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refactor: refactor stream recording ...

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This commit is contained in:
acgnhik 2022-05-29 16:34:00 +08:00
parent eaa60a0817
commit a460c1e9be
82 changed files with 4187 additions and 3048 deletions
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2
.flake8
View File

@ -1,6 +1,6 @@
[flake8]
max-line-length = 88
ignore = D203, W504, W503
ignore = D203, W504, W503, E203
exclude =
__*,
.*,

3
setup.cfg
View File

@ -54,7 +54,7 @@ install_requires =
m3u8 >= 1.0.0, < 2.0.0
jsonpath == 0.82
psutil >= 5.8.0, < 6.0.0
rx >= 3.2.0, < 4.0.0
reactivex >= 4.0.0, < 5.0.0
bitarray >= 2.2.5, < 3.0.0
brotli >= 1.0.9, < 2.0.0
uvicorn[standard] >= 0.15.0, < 0.16.0
@ -65,6 +65,7 @@ install_requires =
mypy == 0.910 # https://github.com/samuelcolvin/pydantic/issues/3528
isort >= 5.10.1
black >= 22.3.0
autoflake >= 1.4
setuptools >= 59.4.0
wheel >= 0.37

3
src/blrec/application.py
View File

@ -7,8 +7,7 @@ import attr
import psutil
from . import __prog__, __version__
from .flv.data_analyser import MetaData
from .core.stream_analyzer import StreamProfile
from .flv.operators import MetaData, StreamProfile
from .disk_space import SpaceMonitor, SpaceReclaimer
from .bili.helpers import ensure_room_id
from .task import (

4
src/blrec/bili/exceptions.py
View File

@ -34,3 +34,7 @@ class NoStreamCodecAvailable(Exception):
class NoStreamQualityAvailable(Exception):
pass
class NoAlternativeStreamAvailable(Exception):
pass

75
src/blrec/bili/live.py
View File

@ -1,30 +1,27 @@
import re
import json
import asyncio
import json
import re
from typing import Dict, List, cast
import aiohttp
from jsonpath import jsonpath
from tenacity import (
retry,
wait_exponential,
stop_after_delay,
retry_if_exception_type,
)
from tenacity import retry, retry_if_exception_type, stop_after_delay, wait_exponential
from .api import AppApi, WebApi
from .models import LiveStatus, RoomInfo, UserInfo
from .typing import (
ApiPlatform, StreamFormat, QualityNumber, StreamCodec, ResponseData
)
from .exceptions import (
LiveRoomHidden, LiveRoomLocked, LiveRoomEncrypted, NoStreamAvailable,
NoStreamFormatAvailable, NoStreamCodecAvailable, NoStreamQualityAvailable,
LiveRoomEncrypted,
LiveRoomHidden,
LiveRoomLocked,
NoAlternativeStreamAvailable,
NoStreamAvailable,
NoStreamCodecAvailable,
NoStreamFormatAvailable,
NoStreamQualityAvailable,
)
from .models import LiveStatus, RoomInfo, UserInfo
from .typing import ApiPlatform, QualityNumber, ResponseData, StreamCodec, StreamFormat
__all__ = 'Live',
__all__ = ('Live',)
_INFO_PATTERN = re.compile(
@ -34,9 +31,7 @@ _LIVE_STATUS_PATTERN = re.compile(rb'"live_status"\s*:\s*(\d)')
class Live:
def __init__(
self, room_id: int, user_agent: str = '', cookie: str = ''
) -> None:
def __init__(self, room_id: int, user_agent: str = '', cookie: str = '') -> None:
self._room_id = room_id
self._user_agent = user_agent
self._cookie = cookie
@ -142,9 +137,7 @@ class Live:
self._room_info = await self.get_room_info()
@retry(
retry=retry_if_exception_type((
asyncio.TimeoutError, aiohttp.ClientError,
)),
retry=retry_if_exception_type((asyncio.TimeoutError, aiohttp.ClientError)),
wait=wait_exponential(max=10),
stop=stop_after_delay(60),
)
@ -158,9 +151,7 @@ class Live:
return RoomInfo.from_data(room_info_data)
@retry(
retry=retry_if_exception_type((
asyncio.TimeoutError, aiohttp.ClientError,
)),
retry=retry_if_exception_type((asyncio.TimeoutError, aiohttp.ClientError)),
wait=wait_exponential(max=10),
stop=stop_after_delay(60),
)
@ -176,14 +167,15 @@ class Live:
# the timestamp on the server at the moment in seconds
return await self._webapi.get_timestamp()
async def get_live_stream_urls(
async def get_live_stream_url(
self,
qn: QualityNumber = 10000,
*,
api_platform: ApiPlatform = 'android',
stream_format: StreamFormat = 'flv',
stream_codec: StreamCodec = 'avc',
) -> List[str]:
select_alternative: bool = False,
) -> str:
if api_platform == 'android':
info = await self._appapi.get_room_play_info(self._room_id, qn)
else:
@ -193,23 +185,30 @@ class Live:
streams = jsonpath(info, '$.playurl_info.playurl.stream[*]')
if not streams:
raise NoStreamAvailable(qn, stream_format, stream_codec)
formats = jsonpath(streams, f'$[*].format[?(@.format_name == "{stream_format}")]') # noqa
raise NoStreamAvailable(stream_format, stream_codec, qn)
formats = jsonpath(
streams, f'$[*].format[?(@.format_name == "{stream_format}")]'
)
if not formats:
raise NoStreamFormatAvailable(qn, stream_format, stream_codec)
codecs = jsonpath(formats, f'$[*].codec[?(@.codec_name == "{stream_codec}")]') # noqa
raise NoStreamFormatAvailable(stream_format, stream_codec, qn)
codecs = jsonpath(formats, f'$[*].codec[?(@.codec_name == "{stream_codec}")]')
if not codecs:
raise NoStreamCodecAvailable(qn, stream_format, stream_codec)
raise NoStreamCodecAvailable(stream_format, stream_codec, qn)
codec = codecs[0]
accept_qn = cast(List[QualityNumber], codec['accept_qn'])
if qn not in accept_qn or codec['current_qn'] != qn:
raise NoStreamQualityAvailable(qn, stream_format, stream_codec)
raise NoStreamQualityAvailable(stream_format, stream_codec, qn)
return [
i['host'] + codec['base_url'] + i['extra']
for i in codec['url_info']
]
urls = [i['host'] + codec['base_url'] + i['extra'] for i in codec['url_info']]
if not select_alternative:
return urls[0]
try:
return urls[1]
except IndexError:
raise NoAlternativeStreamAvailable(stream_format, stream_codec, qn)
def _check_room_play_info(self, data: ResponseData) -> None:
if data.get('is_hidden'):

16
src/blrec/core/danmaku_dumper.py
View File

@ -13,7 +13,7 @@ from tenacity import (
from .. import __version__, __prog__, __github__
from .danmaku_receiver import DanmakuReceiver, DanmuMsg
from .stream_recorder import StreamRecorder, StreamRecorderEventListener
from .statistics import StatisticsCalculator
from .statistics import Statistics
from ..bili.live import Live
from ..exception import exception_callback, submit_exception
from ..event.event_emitter import EventListener, EventEmitter
@ -73,19 +73,19 @@ class DanmakuDumper(
self._lock: asyncio.Lock = asyncio.Lock()
self._path: Optional[str] = None
self._files: List[str] = []
self._calculator = StatisticsCalculator(interval=60)
self._statistics = Statistics(interval=60)
@property
def danmu_total(self) -> int:
return self._calculator.count
return self._statistics.count
@property
def danmu_rate(self) -> float:
return self._calculator.rate
return self._statistics.rate
@property
def elapsed(self) -> float:
return self._calculator.elapsed
return self._statistics.elapsed
@property
def dumping_path(self) -> Optional[str]:
@ -145,7 +145,7 @@ class DanmakuDumper(
async def _do_dump(self) -> None:
assert self._path is not None
logger.debug('Started dumping danmaku')
self._calculator.reset()
self._statistics.reset()
try:
async with DanmakuWriter(self._path) as writer:
@ -169,14 +169,14 @@ class DanmakuDumper(
logger.info(f"Danmaku file completed: '{self._path}'")
await self._emit('danmaku_file_completed', self._path)
logger.debug('Stopped dumping danmaku')
self._calculator.freeze()
self._statistics.freeze()
async def _dumping_loop(self, writer: DanmakuWriter) -> None:
while True:
msg = await self._receiver.get_message()
if isinstance(msg, DanmuMsg):
await writer.write_danmu(self._make_danmu(msg))
self._calculator.submit(1)
self._statistics.submit(1)
elif isinstance(msg, GiftSendMsg):
if not self.record_gift_send:
continue

147
src/blrec/core/flv_stream_recorder_impl.py
View File

@ -1,21 +1,14 @@
import io
import logging
from typing import Optional
from urllib.parse import urlparse
import requests
import urllib3
from tenacity import TryAgain
from tqdm import tqdm
from reactivex.scheduler import NewThreadScheduler
from ..bili.live import Live
from ..bili.typing import QualityNumber
from ..flv.exceptions import FlvDataError, FlvStreamCorruptedError
from ..flv.stream_processor import StreamProcessor
from .stream_analyzer import StreamProfile
from .stream_recorder_impl import StreamProxy, StreamRecorderImpl
from ..flv import operators as flv_ops
from .stream_recorder_impl import StreamRecorderImpl
__all__ = 'FLVStreamRecorderImpl',
__all__ = ('FLVStreamRecorderImpl',)
logger = logging.getLogger(__name__)
@ -49,113 +42,29 @@ class FLVStreamRecorderImpl(StreamRecorderImpl):
)
def _run(self) -> None:
logger.debug('Stream recorder thread started')
try:
with tqdm(
desc='Recording',
unit='B',
unit_scale=True,
unit_divisor=1024,
postfix=self._make_pbar_postfix(),
) as progress_bar:
self._progress_bar = progress_bar
self._stream_processor = StreamProcessor(
self._file_manager,
filesize_limit=self._filesize_limit,
duration_limit=self._duration_limit,
analyse_data=True,
dedup_join=True,
save_extra_metadata=True,
backup_timestamp=True,
)
def update_size(size: int) -> None:
progress_bar.update(size)
self._rec_calculator.submit(size)
def update_stream_profile(profile: StreamProfile) -> None:
self._stream_profile = profile
self._stream_processor.size_updates.subscribe(update_size)
self._stream_processor.stream_profile_updates.subscribe(
update_stream_profile
)
with requests.Session() as self._session:
self._main_loop()
except TryAgain:
pass
except Exception as e:
self._handle_exception(e)
finally:
self._stopped = True
if self._stream_processor is not None:
self._stream_processor.finalize()
self._stream_processor = None
self._progress_bar = None
self._dl_calculator.freeze()
self._rec_calculator.freeze()
self._emit_event('stream_recording_stopped')
logger.debug('Stream recorder thread stopped')
def _streaming_loop(self) -> None:
url = self._get_live_stream_url()
while not self._stopped:
try:
self._streaming(url)
except requests.exceptions.HTTPError as e:
# frequently occurred when the live just started or ended.
logger.warning(repr(e))
self._defer_retry(1, 'streaming_loop')
# the url may has been forbidden or expired
# when the status code is 404 or 403
if e.response.status_code in (403, 404):
url = self._get_live_stream_url()
except requests.exceptions.Timeout as e:
logger.warning(repr(e))
except urllib3.exceptions.TimeoutError as e:
logger.warning(repr(e))
except urllib3.exceptions.ProtocolError as e:
# ProtocolError('Connection broken: IncompleteRead(
logger.warning(repr(e))
except requests.exceptions.ConnectionError as e:
logger.warning(repr(e))
self._wait_for_connection_error()
except (FlvDataError, FlvStreamCorruptedError) as e:
logger.warning(repr(e))
if not self._use_alternative_stream:
self._use_alternative_stream = True
else:
self._rotate_api_platform()
url = self._get_live_stream_url()
def _streaming(self, url: str) -> None:
logger.debug(f'Requesting live stream... {url}')
self._stream_url = url
self._stream_host = urlparse(url).hostname or ''
with self._session.get(
url,
stream=True,
headers=self._live.headers,
timeout=self.read_timeout,
) as response:
logger.debug('Response received')
response.raise_for_status()
if self._stopped:
return
assert self._stream_processor is not None
self._stream_processor.set_metadata(self._make_metadata())
stream_proxy = StreamProxy(response.raw)
stream_proxy.size_updates.subscribe(
lambda n: self._dl_calculator.submit(n)
self._subscription = (
self._stream_param_holder.get_stream_params() # type: ignore
.pipe(
self._stream_url_resolver,
self._stream_fetcher,
self._dl_statistics,
self._stream_parser,
self._request_exception_handler,
self._connection_error_handler,
flv_ops.process(),
self._cutter,
self._limiter,
self._join_point_extractor,
self._prober,
self._injector,
self._analyser,
self._dumper,
self._rec_statistics,
self._progress_bar,
self._exception_handler,
)
self._stream_processor.process_stream(
io.BufferedReader(stream_proxy, buffer_size=8192)
.subscribe(
on_completed=lambda: self._emit_event('stream_recording_completed'),
scheduler=NewThreadScheduler(self._thread_factory('StreamRecorder')),
)
)

498
src/blrec/core/hls_stream_recorder_impl.py
View File

@ -1,51 +1,22 @@
import io
import logging
import time
from contextlib import suppress
from datetime import datetime
from queue import Empty, Queue
from threading import Condition, Event, Lock, Thread
from typing import Final, List, Optional, Set
from urllib.parse import urlparse
from typing import Optional
import m3u8
import requests
import urllib3
from m3u8.model import Segment
from ordered_set import OrderedSet
from tenacity import (
RetryError,
Retrying,
TryAgain,
retry,
retry_if_exception_type,
retry_if_not_exception_type,
retry_if_result,
stop_after_delay,
wait_exponential,
)
from tqdm import tqdm
from reactivex import operators as ops
from reactivex.scheduler import NewThreadScheduler
from ..bili.live import Live
from ..bili.typing import QualityNumber
from ..flv.exceptions import FlvDataError, FlvStreamCorruptedError
from ..flv.stream_processor import StreamProcessor
from ..utils.mixins import SupportDebugMixin
from .stream_analyzer import StreamProfile, ffprobe
from .stream_recorder_impl import StreamProxy, StreamRecorderImpl
from .stream_remuxer import StreamRemuxer
from ..flv import operators as flv_ops
from . import operators as core_ops
from .stream_recorder_impl import StreamRecorderImpl
__all__ = 'HLSStreamRecorderImpl',
__all__ = ('HLSStreamRecorderImpl',)
logger = logging.getLogger(__name__)
class FailedToFetchSegments(Exception):
pass
class HLSStreamRecorderImpl(StreamRecorderImpl, SupportDebugMixin):
class HLSStreamRecorderImpl(StreamRecorderImpl):
def __init__(
self,
live: Live,
@ -71,417 +42,50 @@ class HLSStreamRecorderImpl(StreamRecorderImpl, SupportDebugMixin):
filesize_limit=filesize_limit,
duration_limit=duration_limit,
)
self._init_for_debug(self._live.room_id)
self._init_section_data: Optional[bytes] = None
self._ready_to_fetch_segments = Condition()
self._failed_to_fetch_segments = Event()
self._stream_analysed_lock = Lock()
self._last_seg_uris: OrderedSet[str] = OrderedSet()
self._MAX_LAST_SEG_URIS: Final[int] = 30
self._playlist_fetcher = core_ops.PlaylistFetcher(self._live, self._session)
self._playlist_resolver = core_ops.PlaylistResolver()
self._segment_fetcher = core_ops.SegmentFetcher(self._live, self._session)
self._segment_remuxer = core_ops.SegmentRemuxer(live)
def _run(self) -> None:
logger.debug('Stream recorder thread started')
try:
if self._debug:
path = '{}/playlist-{}-{}.m3u8'.format(
self._debug_dir,
self._live.room_id,
datetime.now().strftime('%Y-%m-%d-%H%M%S-%f'),
)
self._playlist_debug_file = open(path, 'wt', encoding='utf-8')
self._session = requests.Session()
self._session.headers.update(self._live.headers)
self._stream_remuxer = StreamRemuxer(
self._live.room_id,
remove_filler_data=True,
)
self._segment_queue: Queue[Segment] = Queue(maxsize=1000)
self._segment_data_queue: Queue[bytes] = Queue(maxsize=100)
self._stream_host_available = Event()
self._segment_fetcher_thread = Thread(
target=self._run_segment_fetcher,
name=f'SegmentFetcher::{self._live.room_id}',
daemon=True,
)
self._segment_fetcher_thread.start()
self._segment_data_feeder_thread = Thread(
target=self._run_segment_data_feeder,
name=f'SegmentDataFeeder::{self._live.room_id}',
daemon=True,
)
self._segment_data_feeder_thread.start()
self._stream_processor_thread = Thread(
target=self._run_stream_processor,
name=f'StreamProcessor::{self._live.room_id}',
daemon=True,
)
self._stream_processor_thread.start()
try:
self._main_loop()
finally:
if self._stream_processor is not None:
self._stream_processor.cancel()
self._stream_processor_thread.join(timeout=10)
self._segment_fetcher_thread.join(timeout=10)
self._segment_data_feeder_thread.join(timeout=10)
self._stream_remuxer.stop()
self._stream_remuxer.raise_for_exception()
self._last_seg_uris.clear()
del self._segment_queue
del self._segment_data_queue
except TryAgain:
pass
except Exception as e:
self._handle_exception(e)
finally:
self._stopped = True
with suppress(Exception):
self._playlist_debug_file.close()
self._emit_event('stream_recording_stopped')
logger.debug('Stream recorder thread stopped')
def _streaming_loop(self) -> None:
url = self._get_live_stream_url()
while not self._stopped:
try:
self._playlist_fetcher(url)
except requests.exceptions.HTTPError as e:
# frequently occurred when the live just started or ended.
logger.warning(repr(e))
self._defer_retry(1, 'streaming_loop')
# the url may has been forbidden or expired
# when the status code is 404 or 403
if e.response.status_code in (403, 404):
url = self._get_live_stream_url()
except requests.exceptions.ConnectionError as e:
logger.warning(repr(e))
self._wait_for_connection_error()
except FailedToFetchSegments:
url = self._get_live_stream_url()
except RetryError as e:
logger.warning(repr(e))
def _playlist_fetcher(self, url: str) -> None:
self._stream_url = url
self._stream_host = urlparse(url).hostname or ''
self._stream_host_available.set()
with self._stream_analysed_lock:
self._stream_analysed = False
while not self._stopped:
if self._failed_to_fetch_segments.is_set():
with self._segment_queue.mutex:
self._segment_queue.queue.clear()
with self._ready_to_fetch_segments:
self._ready_to_fetch_segments.notify_all()
self._failed_to_fetch_segments.clear()
raise FailedToFetchSegments()
content = self._fetch_playlist(url)
playlist = m3u8.loads(content, uri=url)
if self._debug:
self._playlist_debug_file.write(content + '\n')
if playlist.is_variant:
url = sorted(
playlist.playlists,
key=lambda p: p.stream_info.bandwidth
)[-1].absolute_uri
logger.debug(f'playlist changed to variant playlist: {url}')
self._stream_url = url
self._stream_host = urlparse(url).hostname or ''
with self._stream_analysed_lock:
self._stream_analysed = False
continue
curr_seg_uris: Set[str] = set()
for seg in playlist.segments:
curr_seg_uris.add(seg.uri)
if seg.uri not in self._last_seg_uris:
self._segment_queue.put(seg, timeout=60)
self._last_seg_uris.add(seg.uri)
if len(self._last_seg_uris) > self._MAX_LAST_SEG_URIS:
self._last_seg_uris.pop(0)
if (
self._last_seg_uris and
not curr_seg_uris.intersection(self._last_seg_uris)
):
logger.debug(
'segments broken!\n'
f'last segments uris: {self._last_seg_uris}\n'
f'current segments uris: {curr_seg_uris}'
)
with self._stream_analysed_lock:
self._stream_analysed = False
if playlist.is_endlist:
logger.debug('playlist ended')
time.sleep(1)
def _run_segment_fetcher(self) -> None:
logger.debug('Segment fetcher thread started')
try:
self._segment_fetcher()
except Exception as e:
logger.exception(e)
self._handle_exception(e)
finally:
self._dl_calculator.freeze()
logger.debug('Segment fetcher thread stopped')
def _segment_fetcher(self) -> None:
assert self._stream_remuxer is not None
init_section = None
self._init_section_data = None
num_of_continuously_failed = 0
self._failed_to_fetch_segments.clear()
while not self._stopped:
try:
seg = self._segment_queue.get(timeout=1)
except Empty:
continue
for attempt in Retrying(
reraise=True,
retry=(
retry_if_result(lambda r: not self._stopped) |
retry_if_not_exception_type((OSError, NotImplementedError))
self._subscription = (
self._stream_param_holder.get_stream_params() # type: ignore
.pipe(
self._stream_url_resolver,
ops.subscribe_on(
NewThreadScheduler(self._thread_factory('PlaylistFetcher'))
),
):
if attempt.retry_state.attempt_number > 3:
break
with attempt:
try:
if (
getattr(seg, 'init_section', None) and
(
not init_section or
seg.init_section.uri != init_section.uri
)
):
data = self._fetch_segment(
seg.init_section.absolute_uri
)
init_section = seg.init_section
self._init_section_data = data
self._segment_data_queue.put(data, timeout=60)
data = self._fetch_segment(seg.absolute_uri)
self._segment_data_queue.put(data, timeout=60)
except requests.exceptions.HTTPError as e:
logger.warning(f'Failed to fetch segment: {repr(e)}')
if e.response.status_code in (403, 404, 599):
num_of_continuously_failed += 1
if num_of_continuously_failed >= 3:
self._failed_to_fetch_segments.set()
with self._ready_to_fetch_segments:
self._ready_to_fetch_segments.wait()
num_of_continuously_failed = 0
self._failed_to_fetch_segments.clear()
break
except requests.exceptions.ConnectionError as e:
logger.warning(repr(e))
self._wait_for_connection_error()
except RetryError as e:
logger.warning(repr(e))
break
else:
num_of_continuously_failed = 0
break
def _run_segment_data_feeder(self) -> None:
logger.debug('Segment data feeder thread started')
try:
self._segment_data_feeder()
except Exception as e:
logger.exception(e)
self._handle_exception(e)
finally:
logger.debug('Segment data feeder thread stopped')
def _segment_data_feeder(self) -> None:
assert self._stream_remuxer is not None
MAX_SEGMENT_DATA_CACHE = 3
segment_data_cache: List[bytes] = []
bytes_io = io.BytesIO()
segment_count = 0
def on_next(profile: StreamProfile) -> None:
self._stream_profile = profile
def on_error(e: Exception) -> None:
logger.warning(f'Failed to analyse stream: {repr(e)}')
while not self._stopped:
try:
data = self._segment_data_queue.get(timeout=1)
except Empty:
continue
else:
with self._stream_analysed_lock:
if not self._stream_analysed:
if self._init_section_data and not bytes_io.getvalue():
bytes_io.write(self._init_section_data)
else:
bytes_io.write(data)
segment_count += 1
if segment_count >= 3:
ffprobe(bytes_io.getvalue()).subscribe(
on_next, on_error
)
bytes_io = io.BytesIO()
segment_count = 0
self._stream_analysed = True
try:
if self._stream_remuxer.stopped:
self._stream_remuxer.start()
while True:
ready = self._stream_remuxer.wait(timeout=1)
if self._stopped:
return
if ready:
break
if segment_data_cache:
if self._init_section_data:
self._stream_remuxer.input.write(
self._init_section_data
)
for cached_data in segment_data_cache:
if cached_data == self._init_section_data:
continue
self._stream_remuxer.input.write(cached_data)
self._stream_remuxer.input.write(data)
except BrokenPipeError as e:
if not self._stopped:
logger.warning(repr(e))
else:
logger.debug(repr(e))
except ValueError as e:
if not self._stopped:
logger.warning(repr(e))
else:
logger.debug(repr(e))
segment_data_cache.append(data)
if len(segment_data_cache) > MAX_SEGMENT_DATA_CACHE:
segment_data_cache.pop(0)
def _run_stream_processor(self) -> None:
logger.debug('Stream processor thread started')
assert self._stream_remuxer is not None
with tqdm(
desc='Recording',
unit='B',
unit_scale=True,
unit_divisor=1024,
postfix=self._make_pbar_postfix(),
) as progress_bar:
self._progress_bar = progress_bar
def update_size(size: int) -> None:
progress_bar.update(size)
self._rec_calculator.submit(size)
self._stream_processor = StreamProcessor(
self._file_manager,
filesize_limit=self._filesize_limit,
duration_limit=self._duration_limit,
analyse_data=True,
dedup_join=True,
save_extra_metadata=True,
backup_timestamp=True,
self._playlist_fetcher,
self._request_exception_handler,
self._connection_error_handler,
self._playlist_resolver,
ops.observe_on(
NewThreadScheduler(self._thread_factory('SegmentFetcher'))
),
self._segment_fetcher,
self._dl_statistics,
self._prober,
ops.observe_on(
NewThreadScheduler(self._thread_factory('SegmentRemuxer'))
),
self._segment_remuxer,
ops.observe_on(
NewThreadScheduler(self._thread_factory('StreamRecorder'))
),
self._stream_parser,
flv_ops.process(),
self._cutter,
self._limiter,
self._join_point_extractor,
self._injector,
self._analyser,
self._dumper,
self._rec_statistics,
self._progress_bar,
self._exception_handler,
)
self._stream_processor.size_updates.subscribe(update_size)
try:
while not self._stopped:
while True:
ready = self._stream_remuxer.wait(timeout=1)
if self._stopped:
return
if ready:
break
self._stream_host_available.wait()
self._stream_processor.set_metadata(self._make_metadata())
try:
self._stream_processor.process_stream(
StreamProxy(
self._stream_remuxer.output,
read_timeout=10,
) # type: ignore
)
except BrokenPipeError as e:
logger.debug(repr(e))
except TimeoutError as e:
logger.debug(repr(e))
self._stream_remuxer.stop()
except FlvDataError as e:
logger.warning(repr(e))
self._stream_remuxer.stop()
except FlvStreamCorruptedError as e:
logger.warning(repr(e))
self._stream_remuxer.stop()
except ValueError as e:
logger.warning(repr(e))
self._stream_remuxer.stop()
except Exception as e:
if not self._stopped:
logger.exception(e)
self._handle_exception(e)
else:
logger.debug(repr(e))
finally:
self._stream_processor.finalize()
self._progress_bar = None
self._rec_calculator.freeze()
logger.debug('Stream processor thread stopped')
@retry(
retry=retry_if_exception_type((
requests.exceptions.Timeout,
urllib3.exceptions.TimeoutError,
urllib3.exceptions.ProtocolError,
)),
wait=wait_exponential(multiplier=0.1, max=1),
stop=stop_after_delay(10),
)
def _fetch_playlist(self, url: str) -> str:
response = self._session.get(url, timeout=3)
response.raise_for_status()
response.encoding = 'utf-8'
return response.text
@retry(
retry=retry_if_exception_type((
requests.exceptions.Timeout,
urllib3.exceptions.TimeoutError,
urllib3.exceptions.ProtocolError,
)),
wait=wait_exponential(multiplier=0.1, max=5),
stop=stop_after_delay(60),
)
def _fetch_segment(self, url: str) -> bytes:
with self._session.get(url, stream=True, timeout=10) as response:
response.raise_for_status()
bytes_io = io.BytesIO()
for chunk in response:
bytes_io.write(chunk)
self._dl_calculator.submit(len(chunk))
return bytes_io.getvalue()
.subscribe(
on_completed=lambda: self._emit_event('stream_recording_completed')
)
)

68
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from __future__ import annotations
from collections import OrderedDict
from datetime import datetime, timedelta, timezone
from typing import TYPE_CHECKING, Any, Dict
from .. import __github__, __prog__, __version__
from ..bili.helpers import get_quality_name
from ..bili.live import Live
if TYPE_CHECKING:
from .stream_recorder_impl import StreamRecorderImpl
__all__ = ('MetadataProvider',)
class MetadataProvider:
def __init__(self, live: Live, stream_recorder: StreamRecorderImpl) -> None:
super().__init__()
self._live = live
self._stream_recorder = stream_recorder
def __call__(self) -> Dict[str, Any]:
return self._make_metadata()
def _make_metadata(self) -> Dict[str, Any]:
live_start_time = datetime.fromtimestamp(
self._live.room_info.live_start_time, timezone(timedelta(hours=8))
)
assert self._stream_recorder.real_quality_number is not None
stream_quality = '{} ({}{})'.format(
get_quality_name(self._stream_recorder.real_quality_number),
self._stream_recorder.real_quality_number,
', bluray' if '_bluray' in self._stream_recorder.stream_url else '',
)
return {
'Title': self._live.room_info.title,
'Artist': self._live.user_info.name,
'Date': str(live_start_time),
'Comment': f'''\
B站直播录像
主播：{self._live.user_info.name}
标题：{self._live.room_info.title}
分区：{self._live.room_info.parent_area_name} - {self._live.room_info.area_name}
房间号：{self._live.room_info.room_id}
开播时间：{live_start_time}
流主机: {self._stream_recorder.stream_host}
流格式：{self._stream_recorder.stream_format}
流画质：{stream_quality}
录制程序：{__prog__} v{__version__} {__github__}''',
'description': OrderedDict(
{
'UserId': str(self._live.user_info.uid),
'UserName': self._live.user_info.name,
'RoomId': str(self._live.room_info.room_id),
'RoomTitle': self._live.room_info.title,
'Area': self._live.room_info.area_name,
'ParentArea': self._live.room_info.parent_area_name,
'LiveStartTime': str(live_start_time),
'StreamHost': self._stream_recorder.stream_host,
'StreamFormat': self._stream_recorder.stream_format,
'StreamQuality': stream_quality,
'Recorder': f'{__prog__} v{__version__} {__github__}',
}
),
}

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from .connection_error_handler import ConnectionErrorHandler
from .exception_handler import ExceptionHandler
from .hls_prober import HLSProber, StreamProfile
from .playlist_fetcher import PlaylistFetcher
from .playlist_resolver import PlaylistResolver
from .progress_bar import ProgressBar
from .request_exception_handler import RequestExceptionHandler
from .segment_fetcher import InitSectionData, SegmentData, SegmentFetcher
from .segment_remuxer import SegmentRemuxer
from .sized_statistics import SizedStatistics
from .stream_fetcher import StreamFetcher
from .stream_parser import StreamParser
from .stream_statistics import StreamStatistics
from .stream_url_resolver import StreamURLResolver
__all__ = (
'ConnectionErrorHandler',
'ExceptionHandler',
'HLSProber',
'InitSectionData',
'PlaylistFetcher',
'PlaylistResolver',
'ProgressBar',
'RequestExceptionHandler',
'SegmentData',
'SegmentFetcher',
'SegmentRemuxer',
'SizedStatistics',
'StreamFetcher',
'StreamParser',
'StreamProfile',
'StreamStatistics',
'StreamURLResolver',
)

87
src/blrec/core/operators/connection_error_handler.py Normal file
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from __future__ import annotations
import logging
import time
from typing import Optional, TypeVar
import aiohttp
import requests
from reactivex import Observable, abc
from ...bili.live import Live
from ...utils import operators as utils_ops
from ...utils.mixins import AsyncCooperationMixin
__all__ = ('ConnectionErrorHandler',)
logger = logging.getLogger(__name__)
_T = TypeVar('_T')
class ConnectionErrorHandler(AsyncCooperationMixin):
def __init__(
self,
live: Live,
*,
disconnection_timeout: Optional[int] = None,
check_interval: int = 3,
) -> None:
super().__init__()
self._live = live
self.disconnection_timeout = disconnection_timeout or 600 # seconds
self.check_interval = check_interval
def __call__(self, source: Observable[_T]) -> Observable[_T]:
return self._handle(source).pipe(
utils_ops.retry(should_retry=self._should_retry)
)
def _handle(self, source: Observable[_T]) -> Observable[_T]:
def subscribe(
observer: abc.ObserverBase[_T],
scheduler: Optional[abc.SchedulerBase] = None,
) -> abc.DisposableBase:
def on_error(exc: Exception) -> None:
try:
raise exc
except (
aiohttp.ClientConnectionError,
requests.exceptions.ConnectionError,
) as e:
logger.warning(repr(e))
if self._wait_for_connection_error():
observer.on_error(exc)
else:
observer.on_completed()
except Exception:
pass
observer.on_error(exc)
return source.subscribe(
observer.on_next, on_error, observer.on_completed, scheduler=scheduler
)
return Observable(subscribe)
def _should_retry(self, exc: Exception) -> bool:
if isinstance(
exc, (aiohttp.ClientConnectionError, requests.exceptions.ConnectionError)
):
return True
else:
return False
def _wait_for_connection_error(self) -> bool:
timeout = self.disconnection_timeout
logger.info(f'Waiting {timeout} seconds for connection recovery... ')
timebase = time.monotonic()
while not self._run_coroutine(self._live.check_connectivity()):
if timeout is not None and time.monotonic() - timebase > timeout:
logger.error(f'Connection not recovered in {timeout} seconds')
return False
time.sleep(self.check_interval)
else:
logger.info('Connection recovered')
return True

57
src/blrec/core/operators/exception_handler.py Normal file
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from __future__ import annotations
import errno
import logging
from typing import Optional, TypeVar
from reactivex import Observable, abc
from ...bili.exceptions import LiveRoomEncrypted, LiveRoomHidden, LiveRoomLocked
from ...utils import operators as utils_ops
from ...utils.mixins import AsyncCooperationMixin
__all__ = ('ExceptionHandler',)
logger = logging.getLogger(__name__)
_T = TypeVar('_T')
class ExceptionHandler(AsyncCooperationMixin):
def __call__(self, source: Observable[_T]) -> Observable[_T]:
return self._handle(source).pipe(utils_ops.retry(delay=1))
def _handle(self, source: Observable[_T]) -> Observable[_T]:
def subscribe(
observer: abc.ObserverBase[_T],
scheduler: Optional[abc.SchedulerBase] = None,
) -> abc.DisposableBase:
def on_error(exc: Exception) -> None:
self._submit_exception(exc)
try:
raise exc
except OSError as e:
logger.critical(repr(e), exc_info=e)
if e.errno == errno.ENOSPC:
# OSError(28, 'No space left on device')
observer.on_completed()
else:
observer.on_error(exc)
except LiveRoomHidden:
logger.error('The live room has been hidden!')
observer.on_completed()
except LiveRoomLocked:
logger.error('The live room has been locked!')
observer.on_completed()
except LiveRoomEncrypted:
logger.error('The live room has been encrypted!')
observer.on_completed()
except Exception:
observer.on_error(exc)
return source.subscribe(
observer.on_next, on_error, observer.on_completed, scheduler=scheduler
)
return Observable(subscribe)

79
src/blrec/core/operators/hls_prober.py Normal file
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from __future__ import annotations
import io
import logging
from typing import List, Optional, Union
from reactivex import Observable, Subject, abc
from ...utils.ffprobe import StreamProfile, ffprobe
from .segment_fetcher import InitSectionData, SegmentData
__all__ = ('HLSProber', 'StreamProfile')
logger = logging.getLogger(__name__)
class HLSProber:
def __init__(self) -> None:
self._profiles: Subject[StreamProfile] = Subject()
def _reset(self) -> None:
self._gathering: bool = False
self._gathered_items: List[Union[InitSectionData, SegmentData]] = []
@property
def profiles(self) -> Observable[StreamProfile]:
return self._profiles
def __call__(
self, source: Observable[Union[InitSectionData, SegmentData]]
) -> Observable[Union[InitSectionData, SegmentData]]:
return self._probe(source)
def _probe(
self, source: Observable[Union[InitSectionData, SegmentData]]
) -> Observable[Union[InitSectionData, SegmentData]]:
def subscribe(
observer: abc.ObserverBase[Union[InitSectionData, SegmentData]],
scheduler: Optional[abc.SchedulerBase] = None,
) -> abc.DisposableBase:
self._reset()
def on_next(item: Union[InitSectionData, SegmentData]) -> None:
if isinstance(item, InitSectionData):
self._gathered_items.clear()
self._gathering = True
if self._gathering:
self._gathered_items.append(item)
if len(self._gathered_items) >= 10:
try:
self._do_probe()
except Exception as e:
logger.warning(f'Failed to probe stream: {repr(e)}')
finally:
self._gathered_items.clear()
self._gathering = False
observer.on_next(item)
return source.subscribe(
on_next, observer.on_error, observer.on_completed, scheduler=scheduler
)
return Observable(subscribe)
def _do_probe(self) -> None:
bytes_io = io.BytesIO()
for item in self._gathered_items:
bytes_io.write(item.payload)
def on_next(profile: StreamProfile) -> None:
self._profiles.on_next(profile)
def on_error(e: Exception) -> None:
logger.warning(f'Failed to probe stream by ffprobe: {repr(e)}')
ffprobe(bytes_io.getvalue()).subscribe(on_next, on_error)

105
src/blrec/core/operators/playlist_fetcher.py Normal file
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from __future__ import annotations
import logging
import time
from datetime import datetime
from typing import Optional
import m3u8
import requests
import urllib3
from reactivex import Observable, abc
from reactivex.disposable import CompositeDisposable, Disposable, SerialDisposable
from tenacity import retry, retry_if_exception_type, stop_after_delay, wait_exponential
from ...bili.live import Live
from ...utils.mixins import SupportDebugMixin
__all__ = ('PlaylistFetcher',)
logger = logging.getLogger(__name__)
class PlaylistFetcher(SupportDebugMixin):
def __init__(self, live: Live, session: requests.Session) -> None:
super().__init__()
self._init_for_debug(live.room_id)
self._live = live
self._session = session
def __call__(self, source: Observable[str]) -> Observable[m3u8.M3U8]:
return self._fetch(source)
def _fetch(self, source: Observable[str]) -> Observable[m3u8.M3U8]:
def subscribe(
observer: abc.ObserverBase[m3u8.M3U8],
scheduler: Optional[abc.SchedulerBase] = None,
) -> abc.DisposableBase:
if self._debug:
path = '{}/playlist-{}-{}.m3u8'.format(
self._debug_dir,
self._live.room_id,
datetime.now().strftime('%Y-%m-%d-%H%M%S-%f'),
)
playlist_debug_file = open(path, 'wt', encoding='utf-8')
disposed = False
subscription = SerialDisposable()
def on_next(url: str) -> None:
logger.info(f'Fetching playlist... {url}')
while not disposed:
try:
content = self._fetch_playlist(url)
if self._debug:
playlist_debug_file.write(content + '\n')
playlist = m3u8.loads(content, uri=url)
if playlist.is_variant:
url = self._get_best_quality_url(playlist)
logger.debug('Playlist changed to variant playlist')
on_next(url)
except Exception as e:
logger.warning(f'Failed to fetch playlist: {repr(e)}')
observer.on_error(e)
else:
observer.on_next(playlist)
time.sleep(1)
def dispose() -> None:
nonlocal disposed
disposed = True
if self._debug:
playlist_debug_file.close()
subscription.disposable = source.subscribe(
on_next, observer.on_error, observer.on_completed, scheduler=scheduler
)
return CompositeDisposable(subscription, Disposable(dispose))
return Observable(subscribe)
def _get_best_quality_url(self, playlist: m3u8.M3U8) -> str:
sorted_playlists = sorted(
playlist.playlists, key=lambda p: p.stream_info.bandwidth
)
return sorted_playlists[-1].absolute_uri
@retry(
reraise=True,
retry=retry_if_exception_type(
(
requests.exceptions.Timeout,
urllib3.exceptions.TimeoutError,
urllib3.exceptions.ProtocolError,
)
),
wait=wait_exponential(multiplier=0.1, max=1),
stop=stop_after_delay(10),
)
def _fetch_playlist(self, url: str) -> str:
response = self._session.get(url, headers=self._live.headers, timeout=3)
response.raise_for_status()
response.encoding = 'utf-8'
return response.text

68
src/blrec/core/operators/playlist_resolver.py Normal file
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from __future__ import annotations
import logging
from typing import Final, Optional, Set
import m3u8
import urllib3
from ordered_set import OrderedSet
from reactivex import Observable, abc
from reactivex.disposable import CompositeDisposable, Disposable, SerialDisposable
__all__ = ('PlaylistResolver',)
logger = logging.getLogger(__name__)
logging.getLogger(urllib3.__name__).setLevel(logging.WARNING)
class PlaylistResolver:
_MAX_LAST_SEG_URIS: Final[int] = 30
def __call__(self, source: Observable[m3u8.M3U8]) -> Observable[m3u8.Segment]:
return self._solve(source)
def _solve(self, source: Observable[m3u8.M3U8]) -> Observable[m3u8.Segment]:
def subscribe(
observer: abc.ObserverBase[m3u8.Segment],
scheduler: Optional[abc.SchedulerBase] = None,
) -> abc.DisposableBase:
disposed = False
subscription = SerialDisposable()
last_seg_uris: OrderedSet[str] = OrderedSet()
def on_next(playlist: m3u8.M3U8) -> None:
curr_seg_uris: Set[str] = set()
for seg in playlist.segments:
if disposed:
return
curr_seg_uris.add(seg.uri)
if seg.uri not in last_seg_uris:
observer.on_next(seg)
last_seg_uris.add(seg.uri)
if len(last_seg_uris) > self._MAX_LAST_SEG_URIS:
last_seg_uris.pop(0)
if last_seg_uris and not curr_seg_uris.intersection(last_seg_uris):
logger.debug(
'Segments broken!\n'
f'Last segments uris: {last_seg_uris}\n'
f'Current segments uris: {curr_seg_uris}'
)
if playlist.is_endlist:
logger.debug('Playlist ended')
def dispose() -> None:
nonlocal disposed
disposed = True
last_seg_uris.clear()
subscription.disposable = source.subscribe(
on_next, observer.on_error, observer.on_completed, scheduler=scheduler
)
return CompositeDisposable(subscription, Disposable(dispose))
return Observable(subscribe)

75
src/blrec/core/operators/progress_bar.py Normal file
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from __future__ import annotations
import logging
from typing import Optional
from reactivex import Observable, abc
from reactivex.disposable import CompositeDisposable, Disposable, SerialDisposable
from tqdm import tqdm
from ...bili.live import Live
from ...flv.operators.typing import FLVStream, FLVStreamItem
__all__ = ('ProgressBar',)
logger = logging.getLogger(__name__)
class ProgressBar:
def __init__(self, live: Live) -> None:
self._live = live
self._pbar: Optional[tqdm] = None
def update_bar_info(self) -> None:
if self._pbar is not None:
self._pbar.set_postfix_str(self._make_pbar_postfix())
def __call__(self, source: FLVStream) -> FLVStream:
return self._progress(source)
def _progress(self, source: FLVStream) -> FLVStream:
def subscribe(
observer: abc.ObserverBase[FLVStreamItem],
scheduler: Optional[abc.SchedulerBase] = None,
) -> abc.DisposableBase:
subscription = SerialDisposable()
self._pbar = tqdm(
desc='Recording',
unit='B',
unit_scale=True,
unit_divisor=1024,
postfix=self._make_pbar_postfix(),
)
def on_next(item: FLVStreamItem) -> None:
if self._pbar is not None:
self._pbar.update(len(item))
observer.on_next(item)
def on_completed() -> None:
if self._pbar is not None:
self._pbar.close()
self._pbar = None
observer.on_completed()
def dispose() -> None:
if self._pbar is not None:
self._pbar.close()
self._pbar = None
subscription.disposable = source.subscribe(
on_next, observer.on_error, on_completed, scheduler=scheduler
)
return CompositeDisposable(subscription, Disposable(dispose))
return Observable(subscribe)
def _make_pbar_postfix(self) -> str:
return '{room_id} - {user_name}: {room_title}'.format(
room_id=self._live.room_info.room_id,
user_name=self._live.user_info.name,
room_title=self._live.room_info.title,
)

69
src/blrec/core/operators/request_exception_handler.py Normal file
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from __future__ import annotations
import asyncio
import logging
from typing import Optional, TypeVar
import requests
import urllib3
from reactivex import Observable, abc
from ...utils import operators as utils_ops
__all__ = ('RequestExceptionHandler',)
logger = logging.getLogger(__name__)
_T = TypeVar('_T')
class RequestExceptionHandler:
def __call__(self, source: Observable[_T]) -> Observable[_T]:
return self._handle(source).pipe(
utils_ops.retry(delay=1, should_retry=self._should_retry)
)
def _handle(self, source: Observable[_T]) -> Observable[_T]:
def subscribe(
observer: abc.ObserverBase[_T],
scheduler: Optional[abc.SchedulerBase] = None,
) -> abc.DisposableBase:
def on_error(exc: Exception) -> None:
try:
raise exc
except asyncio.exceptions.TimeoutError:
logger.warning(repr(exc))
except requests.exceptions.Timeout:
logger.warning(repr(exc))
except requests.exceptions.HTTPError:
logger.warning(repr(exc))
except urllib3.exceptions.TimeoutError:
logger.warning(repr(exc))
except urllib3.exceptions.ProtocolError:
# ProtocolError('Connection broken: IncompleteRead(
logger.warning(repr(exc))
except Exception:
pass
observer.on_error(exc)
return source.subscribe(
observer.on_next, on_error, observer.on_completed, scheduler=scheduler
)
return Observable(subscribe)
def _should_retry(self, exc: Exception) -> bool:
if isinstance(
exc,
(
asyncio.exceptions.TimeoutError,
requests.exceptions.Timeout,
requests.exceptions.HTTPError,
urllib3.exceptions.TimeoutError,
urllib3.exceptions.ProtocolError,
),
):
return True
else:
return False

105
src/blrec/core/operators/segment_fetcher.py Normal file
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from __future__ import annotations
import logging
from typing import Optional, Union
import attr
import m3u8
import requests
import urllib3
from m3u8.model import InitializationSection
from reactivex import Observable, abc
from reactivex.disposable import CompositeDisposable, Disposable, SerialDisposable
from tenacity import retry, retry_if_exception_type, stop_after_delay, wait_exponential
from ...bili.live import Live
__all__ = ('SegmentFetcher', 'InitSectionData', 'SegmentData')
logger = logging.getLogger(__name__)
@attr.s(auto_attribs=True, slots=True, frozen=True)
class InitSectionData:
payload: bytes
def __len__(self) -> int:
return len(self.payload)
@attr.s(auto_attribs=True, slots=True, frozen=True)
class SegmentData:
payload: bytes
def __len__(self) -> int:
return len(self.payload)
class SegmentFetcher:
def __init__(self, live: Live, session: requests.Session) -> None:
self._live = live
self._session = session
def __call__(
self, source: Observable[m3u8.Segment]
) -> Observable[Union[InitSectionData, SegmentData]]:
return self._fetch(source)
def _fetch(
self, source: Observable[m3u8.Segment]
) -> Observable[Union[InitSectionData, SegmentData]]:
def subscribe(
observer: abc.ObserverBase[Union[InitSectionData, SegmentData]],
scheduler: Optional[abc.SchedulerBase] = None,
) -> abc.DisposableBase:
disposed = False
subscription = SerialDisposable()
init_section: Optional[InitializationSection] = None
def on_next(seg: m3u8.Segment) -> None:
nonlocal init_section
url: str = ''
try:
if getattr(seg, 'init_section', None) and (
not init_section or seg.init_section.uri != init_section.uri
):
url = seg.init_section.absolute_uri
data = self._fetch_segment(url)
init_section = seg.init_section
observer.on_next(InitSectionData(payload=data))
url = seg.absolute_uri
data = self._fetch_segment(url)
observer.on_next(SegmentData(payload=data))
except Exception as e:
logger.warning(f'Failed to fetch segment {url}: {repr(e)}')
def dispose() -> None:
nonlocal disposed
disposed = True
subscription.disposable = source.subscribe(
on_next, observer.on_error, observer.on_completed, scheduler=scheduler
)
return CompositeDisposable(subscription, Disposable(dispose))
return Observable(subscribe)
@retry(
reraise=True,
retry=retry_if_exception_type(
(
requests.exceptions.Timeout,
requests.exceptions.HTTPError,
urllib3.exceptions.TimeoutError,
urllib3.exceptions.ProtocolError,
)
),
wait=wait_exponential(multiplier=0.1, max=5),
stop=stop_after_delay(60),
)
def _fetch_segment(self, url: str) -> bytes:
with self._session.get(url, headers=self._live.headers, timeout=10) as response:
response.raise_for_status()
return response.content

123
src/blrec/core/operators/segment_remuxer.py Normal file
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@ -0,0 +1,123 @@
from __future__ import annotations
import io
import logging
from typing import Final, List, Optional, Union
import urllib3
from reactivex import Observable, abc
from reactivex.disposable import CompositeDisposable, Disposable, SerialDisposable
from ...bili.live import Live
from ...utils.io import wait_for
from ..stream_remuxer import StreamRemuxer
from .segment_fetcher import InitSectionData, SegmentData
__all__ = ('SegmentRemuxer',)
logger = logging.getLogger(__name__)
logging.getLogger(urllib3.__name__).setLevel(logging.WARNING)
class SegmentRemuxer:
_MAX_SEGMENT_DATA_CACHE: Final = 3
def __init__(self, live: Live) -> None:
self._live = live
self._stream_remuxer = StreamRemuxer(live.room_id, remove_filler_data=True)
def __call__(
self, source: Observable[Union[InitSectionData, SegmentData]]
) -> Observable[io.RawIOBase]:
return self._remux(source)
def _remux(
self, source: Observable[Union[InitSectionData, SegmentData]]
) -> Observable[io.RawIOBase]:
def subscribe(
observer: abc.ObserverBase[io.RawIOBase],
scheduler: Optional[abc.SchedulerBase] = None,
) -> abc.DisposableBase:
disposed = False
subscription = SerialDisposable()
init_section_data: Optional[bytes] = None
segment_data_cache: List[bytes] = []
self._stream_remuxer.stop()
def on_next(data: Union[InitSectionData, SegmentData]) -> None:
nonlocal init_section_data
if isinstance(data, InitSectionData):
init_section_data = data.payload
try:
if self._stream_remuxer.stopped:
self._stream_remuxer.start()
while True:
ready = self._stream_remuxer.wait(timeout=1)
if disposed:
return
if ready:
break
observer.on_next(RemuxedStream(self._stream_remuxer))
if segment_data_cache:
if init_section_data:
self._stream_remuxer.input.write(init_section_data)
for cached_data in segment_data_cache:
if cached_data == init_section_data:
continue
self._stream_remuxer.input.write(cached_data)
self._stream_remuxer.input.write(data.payload)
except Exception as exc:
logger.warning(f'Failed to write data to stream remuxer: {exc}')
self._stream_remuxer.stop()
segment_data_cache.append(data.payload)
if len(segment_data_cache) > self._MAX_SEGMENT_DATA_CACHE:
segment_data_cache.pop(0)
def dispose() -> None:
nonlocal disposed
disposed = True
subscription.disposable = source.subscribe(
on_next, observer.on_error, observer.on_completed, scheduler=scheduler
)
return CompositeDisposable(subscription, Disposable(dispose))
return Observable(subscribe)
class RemuxedStream(io.RawIOBase):
def __init__(
self, stream_remuxer: StreamRemuxer, *, read_timeout: float = 10
) -> None:
self._stream_remuxer = stream_remuxer
self._read_timmeout = read_timeout
self._offset: int = 0
def read(self, size: int = -1) -> bytes:
try:
data = wait_for(
self._stream_remuxer.output.read,
args=(size,),
timeout=self._read_timmeout,
)
except Exception as exc:
logger.warning(f'Failed to read data from stream remuxer: {exc}')
self._stream_remuxer.stop()
raise EOFError
else:
assert data is not None
self._offset += len(data)
return data
def tell(self) -> int:
return self._offset

51
src/blrec/core/operators/sized_statistics.py Normal file
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@ -0,0 +1,51 @@
from __future__ import annotations
from typing import Optional, Sized
from reactivex import Observable, abc
from ..statistics import Statistics
__all__ = ('SizedStatistics',)
class SizedStatistics:
def __init__(self) -> None:
self._statistics = Statistics()
@property
def count(self) -> int:
return self._statistics.count
@property
def rate(self) -> float:
return self._statistics.rate
@property
def elapsed(self) -> float:
return self._statistics.elapsed
def freeze(self) -> None:
self._statistics.freeze()
def reset(self) -> None:
self._statistics.reset()
def __call__(self, source: Observable[Sized]) -> Observable[Sized]:
self.reset()
return self._calc(source)
def _calc(self, source: Observable[Sized]) -> Observable[Sized]:
def subscribe(
observer: abc.ObserverBase[Sized],
scheduler: Optional[abc.SchedulerBase] = None,
) -> abc.DisposableBase:
def on_next(item: Sized) -> None:
self._statistics.submit(len(item))
observer.on_next(item)
return source.subscribe(
on_next, observer.on_error, observer.on_completed, scheduler=scheduler
)
return Observable(subscribe)

61
src/blrec/core/operators/stream_fetcher.py Normal file
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@ -0,0 +1,61 @@
from __future__ import annotations
import io
import logging
from typing import Optional
import requests
from reactivex import Observable, abc
from ...bili.live import Live
from ...utils.mixins import AsyncCooperationMixin
__all__ = ('StreamFetcher',)
logger = logging.getLogger(__name__)
class StreamFetcher(AsyncCooperationMixin):
def __init__(
self,
live: Live,
session: requests.Session,
*,
read_timeout: Optional[int] = None,
) -> None:
super().__init__()
self._live = live
self._session = session
self.read_timeout = read_timeout or 3
def __call__(self, source: Observable[str]) -> Observable[io.RawIOBase]:
return self._fetch(source)
def _fetch(self, source: Observable[str]) -> Observable[io.RawIOBase]:
def subscribe(
observer: abc.ObserverBase[io.RawIOBase],
scheduler: Optional[abc.SchedulerBase] = None,
) -> abc.DisposableBase:
def on_next(url: str) -> None:
try:
logger.info(f'Requesting live stream... {url}')
response = self._session.get(
url,
stream=True,
headers=self._live.headers,
timeout=self.read_timeout,
)
logger.info('Response received')
response.raise_for_status()
except Exception as e:
logger.warning(f'Failed to request live stream: {repr(e)}')
observer.on_error(e)
else:
observer.on_next(response.raw) # urllib3.response.HTTPResponse
return source.subscribe(
on_next, observer.on_error, observer.on_completed, scheduler=scheduler
)
return Observable(subscribe)

54
src/blrec/core/operators/stream_parser.py Normal file
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@ -0,0 +1,54 @@
from __future__ import annotations
import io
import logging
from reactivex import Observable
from reactivex import operators as ops
from ...flv import operators as flv_ops
from ...flv.exceptions import FlvDataError
from ...flv.operators.typing import FLVStream
from ...utils import operators as utils_ops
from ..stream_param_holder import StreamParamHolder
__all__ = ('StreamParser',)
logger = logging.getLogger(__name__)
class StreamParser:
def __init__(
self, stream_param_holder: StreamParamHolder, *, ignore_eof: bool = False
) -> None:
self._stream_param_holder = stream_param_holder
self._ignore_eof = ignore_eof
def __call__(self, source: Observable[io.RawIOBase]) -> FLVStream:
return source.pipe( # type: ignore
flv_ops.parse(ignore_eof=self._ignore_eof, backup_timestamp=True),
ops.do_action(on_error=self._before_retry),
utils_ops.retry(should_retry=self._should_retry),
)
def _should_retry(self, exc: Exception) -> bool:
if isinstance(exc, (EOFError, FlvDataError)):
return True
else:
return False
def _before_retry(self, exc: Exception) -> None:
try:
raise exc
except EOFError:
logger.debug(repr(exc))
except FlvDataError:
logger.warning(f'Failed to parse stream: {repr(exc)}')
if not self._stream_param_holder.use_alternative_stream:
self._stream_param_holder.use_alternative_stream = True
else:
self._stream_param_holder.use_alternative_stream = False
self._stream_param_holder.rotate_api_platform()
except Exception:
pass

81
src/blrec/core/operators/stream_statistics.py Normal file
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@ -0,0 +1,81 @@
from __future__ import annotations
import io
from typing import Any, Optional
from reactivex import Observable, Subject, abc
from ..statistics import Statistics
__all__ = ('StreamStatistics',)
class StreamStatistics:
def __init__(self) -> None:
self._statistics = Statistics()
@property
def count(self) -> int:
return self._statistics.count
@property
def rate(self) -> float:
return self._statistics.rate
@property
def elapsed(self) -> float:
return self._statistics.elapsed
def freeze(self) -> None:
self._statistics.freeze()
def reset(self) -> None:
self._statistics.reset()
def __call__(self, source: Observable[io.RawIOBase]) -> Observable[io.RawIOBase]:
self.reset()
return self._calc(source)
def _calc(self, source: Observable[io.RawIOBase]) -> Observable[io.RawIOBase]:
def subscribe(
observer: abc.ObserverBase[io.RawIOBase],
scheduler: Optional[abc.SchedulerBase] = None,
) -> abc.DisposableBase:
def on_next(stream: io.RawIOBase) -> None:
calculable_stream = CalculableStream(stream)
calculable_stream.size_updates.subscribe(self._statistics.submit)
observer.on_next(calculable_stream)
return source.subscribe(
on_next, observer.on_error, observer.on_completed, scheduler=scheduler
)
return Observable(subscribe)
class CalculableStream(io.RawIOBase):
def __init__(self, stream: io.RawIOBase) -> None:
self._stream = stream
self._offset: int = 0
self._size_updates: Subject[int] = Subject()
@property
def size_updates(self) -> Observable[int]:
return self._size_updates
def read(self, size: int = -1) -> bytes:
data = self._stream.read(size)
assert data is not None
self._offset += len(data)
self._size_updates.on_next(len(data))
return data
def readinto(self, b: Any) -> int:
n = self._stream.readinto(b)
assert n is not None
self._offset += n
self._size_updates.on_next(n)
return n
def tell(self) -> int:
return self._offset

160
src/blrec/core/operators/stream_url_resolver.py Normal file
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@ -0,0 +1,160 @@
from __future__ import annotations
import logging
from typing import Optional
from urllib.parse import urlparse
import requests
import urllib3
from reactivex import Observable, abc
from reactivex import operators as ops
from ...bili.exceptions import (
LiveRoomEncrypted,
LiveRoomHidden,
LiveRoomLocked,
NoAlternativeStreamAvailable,
NoStreamAvailable,
NoStreamCodecAvailable,
NoStreamFormatAvailable,
NoStreamQualityAvailable,
)
from ...bili.live import Live
from ...utils import operators as utils_ops
from ...utils.mixins import AsyncCooperationMixin
from ..stream_param_holder import StreamParamHolder, StreamParams
__all__ = ('StreamURLResolver',)
logger = logging.getLogger(__name__)
logging.getLogger(urllib3.__name__).setLevel(logging.WARNING)
class StreamURLResolver(AsyncCooperationMixin):
def __init__(self, live: Live, stream_param_holder: StreamParamHolder) -> None:
super().__init__()
self._live = live
self._stream_param_holder = stream_param_holder
self._stream_url: str = ''
self._stream_host: str = ''
self._stream_params: Optional[StreamParams] = None
@property
def stream_url(self) -> str:
return self._stream_url
@property
def stream_host(self) -> str:
return self._stream_host
def _reset(self) -> None:
self._stream_url = ''
self._stream_host = ''
self._stream_params = None
def __call__(self, source: Observable[StreamParams]) -> Observable[str]:
self._reset()
return self._solve(source).pipe(
ops.do_action(on_error=self._before_retry),
utils_ops.retry(delay=1, should_retry=self._should_retry),
)
def _solve(self, source: Observable[StreamParams]) -> Observable[str]:
def subscribe(
observer: abc.ObserverBase[str],
scheduler: Optional[abc.SchedulerBase] = None,
) -> abc.DisposableBase:
def on_next(params: StreamParams) -> None:
if self._can_resue_url(params):
observer.on_next(self._stream_url)
return
try:
logger.info(
f'Getting the live stream url... '
f'qn: {params.quality_number}, '
f'format: {params.stream_format}, '
f'api platform: {params.api_platform}, '
f'use alternative stream: {params.use_alternative_stream}'
)
url = self._run_coroutine(
self._live.get_live_stream_url(
params.quality_number,
api_platform=params.api_platform,
stream_format=params.stream_format,
select_alternative=params.use_alternative_stream,
)
)
except Exception as e:
logger.warning(f'Failed to get live stream url: {repr(e)}')
observer.on_error(e)
else:
logger.info(f"Got live stream url: '{url}'")
self._stream_url = url
self._stream_host = urlparse(url).hostname or ''
self._stream_params = params
observer.on_next(url)
return source.subscribe(
on_next, observer.on_error, observer.on_completed, scheduler=scheduler
)
return Observable(subscribe)
def _can_resue_url(self, params: StreamParams) -> bool:
if params == self._stream_params and self._stream_url:
try:
response = requests.get(
self._stream_url, stream=True, headers=self._live.headers
)
response.raise_for_status()
except Exception:
return False
else:
return True
else:
return False
def _should_retry(self, exc: Exception) -> bool:
if isinstance(
exc,
(
NoStreamAvailable,
NoStreamCodecAvailable,
NoStreamFormatAvailable,
NoStreamQualityAvailable,
NoAlternativeStreamAvailable,
),
):
return True
else:
return False
def _before_retry(self, exc: Exception) -> None:
try:
raise exc
except (NoStreamAvailable, NoStreamCodecAvailable, NoStreamFormatAvailable):
pass
except NoStreamQualityAvailable:
qn = self._stream_param_holder.quality_number
logger.info(
f'The specified stream quality ({qn}) is not available, '
'will using the original stream quality (10000) instead.'
)
self._stream_param_holder.fall_back_quality()
except NoAlternativeStreamAvailable:
logger.debug(
'No alternative stream url available, '
'will using the primary stream url instead.'
)
self._stream_param_holder.use_alternative_stream = False
self._stream_param_holder.rotate_api_platform()
except LiveRoomHidden:
pass
except LiveRoomLocked:
pass
except LiveRoomEncrypted:
pass
except Exception:
pass

81
src/blrec/core/path_provider.py Normal file
View File

@ -0,0 +1,81 @@
import asyncio
import logging
import os
import re
import time
from datetime import datetime
from typing import Tuple
import aiohttp
from tenacity import retry, retry_if_exception_type, stop_after_delay, wait_exponential
from ..bili.live import Live
from ..path import escape_path
from ..utils.mixins import AsyncCooperationMixin
__all__ = ('PathProvider',)
logger = logging.getLogger(__name__)
class PathProvider(AsyncCooperationMixin):
def __init__(self, live: Live, out_dir: str, path_template: str) -> None:
super().__init__()
self._live = live
self.out_dir = out_dir
self.path_template = path_template
def __call__(self) -> Tuple[str, int]:
timestamp = self._get_timestamp()
path = self._make_path(timestamp)
return path, timestamp
def _get_timestamp(self) -> int:
try:
return self._get_server_timestamp()
except Exception as e:
logger.warning(f'Failed to get server timestamp: {repr(e)}')
return self._get_local_timestamp()
def _get_local_timestamp(self) -> int:
return int(time.time())
@retry(
reraise=True,
retry=retry_if_exception_type((asyncio.TimeoutError, aiohttp.ClientError)),
wait=wait_exponential(multiplier=0.1, max=1),
stop=stop_after_delay(3),
)
def _get_server_timestamp(self) -> int:
return self._run_coroutine(self._live.get_server_timestamp())
def _make_path(self, timestamp: int) -> str:
date_time = datetime.fromtimestamp(timestamp)
relpath = self.path_template.format(
roomid=self._live.room_id,
uname=escape_path(self._live.user_info.name),
title=escape_path(self._live.room_info.title),
area=escape_path(self._live.room_info.area_name),
parent_area=escape_path(self._live.room_info.parent_area_name),
year=date_time.year,
month=str(date_time.month).rjust(2, '0'),
day=str(date_time.day).rjust(2, '0'),
hour=str(date_time.hour).rjust(2, '0'),
minute=str(date_time.minute).rjust(2, '0'),
second=str(date_time.second).rjust(2, '0'),
)
pathname = os.path.abspath(
os.path.expanduser(os.path.join(self.out_dir, relpath) + '.flv')
)
os.makedirs(os.path.dirname(pathname), exist_ok=True)
while os.path.exists(pathname):
root, ext = os.path.splitext(pathname)
m = re.search(r'_\((\d+)\)$', root)
if m is None:
root += '_(1)'
else:
root = re.sub(r'\(\d+\)$', f'({int(m.group(1)) + 1})', root)
pathname = root + ext
return pathname

7
src/blrec/core/recorder.py
View File

@ -13,7 +13,7 @@ from ..bili.live_monitor import LiveEventListener, LiveMonitor
from ..bili.models import RoomInfo
from ..bili.typing import QualityNumber, StreamFormat
from ..event.event_emitter import EventEmitter, EventListener
from ..flv.data_analyser import MetaData
from ..flv.operators import MetaData, StreamProfile
from ..logging.room_id import aio_task_with_room_id
from ..utils.mixins import AsyncStoppableMixin
from .cover_downloader import CoverDownloader, CoverSaveStrategy
@ -21,7 +21,6 @@ from .danmaku_dumper import DanmakuDumper, DanmakuDumperEventListener
from .danmaku_receiver import DanmakuReceiver
from .raw_danmaku_dumper import RawDanmakuDumper, RawDanmakuDumperEventListener
from .raw_danmaku_receiver import RawDanmakuReceiver
from .stream_analyzer import StreamProfile
from .stream_recorder import StreamRecorder, StreamRecorderEventListener
__all__ = 'RecorderEventListener', 'Recorder'
@ -402,8 +401,8 @@ class Recorder(
async def on_raw_danmaku_file_completed(self, path: str) -> None:
await self._emit('raw_danmaku_file_completed', self, path)
async def on_stream_recording_stopped(self) -> None:
logger.debug('Stream recording stopped')
async def on_stream_recording_completed(self) -> None:
logger.debug('Stream recording completed')
await self._stop_recording()
async def _do_start(self) -> None:

60
src/blrec/core/retry.py
View File

@ -1,60 +0,0 @@
import logging
from typing import Any, Callable, Optional, Type, cast
from tenacity import wait_exponential, RetryCallState
from tenacity import _utils
class wait_exponential_for_same_exceptions(wait_exponential):
"""Wait strategy that applies exponential backoff only for same
continuing exceptions.
"""
def __init__(
self,
multiplier: float = 1,
max: float = _utils.MAX_WAIT,
exp_base: int = 2,
min: float = 0,
continuing_criteria: float = 5.0,
) -> None:
super().__init__(multiplier, max, exp_base, min)
self._continuing_criteria = continuing_criteria
self._prev_exc_type: Optional[Type[BaseException]] = None
self._prev_exc_ts: Optional[float] = None
self._last_wait_time: float = 0
def __call__(self, retry_state: RetryCallState) -> float:
if (
retry_state.outcome is not None and
(exc := retry_state.outcome.exception())
):
curr_exc_type = type(exc)
curr_exc_ts = cast(float, retry_state.outcome_timestamp)
if (
curr_exc_type is not self._prev_exc_type or
not self._is_continuing(curr_exc_ts)
):
retry_state.attempt_number = 1
self._prev_exc_type = curr_exc_type
self._prev_exc_ts = curr_exc_ts
self._last_wait_time = wait_time = super().__call__(retry_state)
return wait_time
def _is_continuing(self, curr_exc_ts: float) -> bool:
assert self._prev_exc_ts is not None
return (
curr_exc_ts - (self._prev_exc_ts + self._last_wait_time) <
self._continuing_criteria
)
def before_sleep_log(
logger: logging.Logger, log_level: int, name: str = ''
) -> Callable[[RetryCallState], Any]:
def log_it(retry_state: RetryCallState) -> None:
seconds = cast(float, getattr(retry_state.next_action, 'sleep'))
logger.log(log_level, 'Retry %s after %s seconds', name, seconds)
return log_it

4
src/blrec/core/statistics.py
View File

@ -1,10 +1,10 @@
import time
__all__ = 'StatisticsCalculator',
__all__ = 'Statistics',
class StatisticsCalculator:
class Statistics:
def __init__(self, interval: float = 1.0) -> None:
self._interval = interval
self._frozen = True

120
src/blrec/core/stream_param_holder.py Normal file
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@ -0,0 +1,120 @@
from __future__ import annotations
import logging
from typing import Any, Final, Optional
import attr
from reactivex import Observable, abc, create
from reactivex.disposable import CompositeDisposable, Disposable, SerialDisposable
from reactivex.scheduler.currentthreadscheduler import CurrentThreadScheduler
from ..bili.typing import ApiPlatform, QualityNumber, StreamFormat
__all__ = ('StreamParamHolder',)
logger = logging.getLogger(__name__)
@attr.s(auto_attribs=True, frozen=True, slots=True)
class StreamParams:
stream_format: StreamFormat
quality_number: QualityNumber
api_platform: ApiPlatform
use_alternative_stream: bool
class StreamParamHolder:
def __init__(
self,
*,
stream_format: StreamFormat = 'flv',
quality_number: QualityNumber = 10000,
api_platform: ApiPlatform = 'android',
use_alternative_stream: bool = False,
) -> None:
super().__init__()
self._stream_format: Final = stream_format
self._quality_number = quality_number
self._real_quality_number: Optional[QualityNumber] = None
self._api_platform: ApiPlatform = api_platform
self._use_alternative_stream: bool = use_alternative_stream
self._cancelled: bool = False
def reset(self) -> None:
self._real_quality_number = None
self._api_platform = 'android'
self._use_alternative_stream = False
self._cancelled = False
def cancel(self) -> None:
self._cancelled = True
@property
def stream_format(self) -> StreamFormat:
return self._stream_format
@property
def quality_number(self) -> QualityNumber:
return self._quality_number
@quality_number.setter
def quality_number(self, value: QualityNumber) -> None:
self._quality_number = value
@property
def real_quality_number(self) -> QualityNumber:
return self._real_quality_number or self._quality_number
@property
def use_alternative_stream(self) -> bool:
return self._use_alternative_stream
@use_alternative_stream.setter
def use_alternative_stream(self, value: bool) -> None:
self._use_alternative_stream = value
def fall_back_quality(self) -> None:
self._real_quality_number = 10000
def rotate_api_platform(self) -> None:
if self._api_platform == 'android':
self._api_platform = 'web'
else:
self._api_platform = 'android'
def get_stream_params(self) -> Observable[StreamParams]:
self.reset()
def subscribe(
observer: abc.ObserverBase[StreamParams],
scheduler: Optional[abc.SchedulerBase] = None,
) -> abc.DisposableBase:
_scheduler = scheduler or CurrentThreadScheduler.singleton()
disposed = False
cancelable = SerialDisposable()
def action(
scheduler: abc.SchedulerBase, state: Optional[Any] = None
) -> None:
if self._cancelled or disposed:
return
params = StreamParams(
stream_format=self._stream_format,
quality_number=self._real_quality_number or self._quality_number,
api_platform=self._api_platform,
use_alternative_stream=self._use_alternative_stream,
)
observer.on_next(params)
cancelable.disposable = _scheduler.schedule(action)
def dispose() -> None:
nonlocal disposed
disposed = True
return CompositeDisposable(cancelable, Disposable(dispose))
return create(subscribe)

9
src/blrec/core/stream_recorder.py
View File

@ -6,11 +6,10 @@ from typing import Iterator, Optional
from ..bili.live import Live
from ..bili.typing import QualityNumber, StreamFormat
from ..event.event_emitter import EventEmitter
from ..flv.data_analyser import MetaData
from ..flv.operators import MetaData, StreamProfile
from ..utils.mixins import AsyncStoppableMixin
from .flv_stream_recorder_impl import FLVStreamRecorderImpl
from .hls_stream_recorder_impl import HLSStreamRecorderImpl
from .stream_analyzer import StreamProfile
from .stream_recorder_impl import StreamRecorderEventListener
__all__ = 'StreamRecorder', 'StreamRecorderEventListener'
@ -230,15 +229,15 @@ class StreamRecorder(
async def on_video_file_completed(self, path: str) -> None:
await self._emit('video_file_completed', path)
async def on_stream_recording_stopped(self) -> None:
await self._emit('stream_recording_stopped')
async def on_stream_recording_completed(self) -> None:
await self._emit('stream_recording_completed')
async def _wait_fmp4_stream(self) -> bool:
end_time = time.monotonic() + self.fmp4_stream_timeout
available = False # debounce
while True:
try:
await self._impl._live.get_live_stream_urls(stream_format='fmp4')
await self._impl._live.get_live_stream_url(stream_format='fmp4')
except Exception:
available = False
if time.monotonic() > end_time:

587
src/blrec/core/stream_recorder_impl.py
View File

@ -1,61 +1,27 @@
import asyncio
import errno
import io
import logging
import os
import re
import time
from abc import ABC, abstractmethod
from collections import OrderedDict
from datetime import datetime, timedelta, timezone
from threading import Thread
from typing import Any, BinaryIO, Dict, Final, Iterator, Optional, Tuple
from typing import Any, Iterator, List, Optional, Tuple, Union
import aiohttp
import requests
import urllib3
from rx.core import Observable
from rx.subject import Subject
from tenacity import (
Retrying,
TryAgain,
retry,
retry_if_exception_type,
retry_if_not_exception_type,
retry_if_result,
stop_after_attempt,
stop_after_delay,
wait_chain,
wait_exponential,
wait_fixed,
wait_none,
)
from tqdm import tqdm
from reactivex import abc
from reactivex.typing import StartableFactory, StartableTarget
from .. import __github__, __prog__, __version__
from ..bili.exceptions import (
LiveRoomEncrypted,
LiveRoomHidden,
LiveRoomLocked,
NoStreamAvailable,
NoStreamFormatAvailable,
NoStreamQualityAvailable,
)
from ..bili.helpers import get_quality_name
from ..bili.live import Live
from ..bili.typing import ApiPlatform, QualityNumber, StreamFormat
from ..bili.typing import QualityNumber, StreamFormat
from ..event.event_emitter import EventEmitter, EventListener
from ..flv.data_analyser import MetaData
from ..flv.stream_processor import BaseOutputFileManager, StreamProcessor
from ..flv import operators as flv_ops
from ..flv.metadata_dumper import MetadataDumper
from ..flv.operators import StreamProfile
from ..logging.room_id import aio_task_with_room_id
from ..path import escape_path
from ..utils.io import wait_for
from ..utils.mixins import AsyncCooperationMixin, AsyncStoppableMixin
from .retry import before_sleep_log, wait_exponential_for_same_exceptions
from .statistics import StatisticsCalculator
from .stream_analyzer import StreamProfile
from .stream_remuxer import StreamRemuxer
from . import operators as core_ops
from .metadata_provider import MetadataProvider
from .path_provider import PathProvider
from .stream_param_holder import StreamParamHolder
__all__ = 'StreamRecorderImpl',
__all__ = ('StreamRecorderImpl',)
logger = logging.getLogger(__name__)
@ -63,15 +29,13 @@ logging.getLogger(urllib3.__name__).setLevel(logging.WARNING)
class StreamRecorderEventListener(EventListener):
async def on_video_file_created(
self, path: str, record_start_time: int
) -> None:
async def on_video_file_created(self, path: str, record_start_time: int) -> None:
...
async def on_video_file_completed(self, path: str) -> None:
...
async def on_stream_recording_stopped(self) -> None:
async def on_stream_recording_completed(self) -> None:
...
@ -98,139 +62,183 @@ class StreamRecorderImpl(
super().__init__()
self._live = live
self._progress_bar: Optional[tqdm] = None
self._stream_remuxer: Optional[StreamRemuxer] = None
self._stream_processor: Optional[StreamProcessor] = None
self._dl_calculator = StatisticsCalculator()
self._rec_calculator = StatisticsCalculator()
self._file_manager = OutputFileManager(
live, out_dir, path_template, buffer_size
self._session = requests.Session()
self._stream_param_holder = StreamParamHolder(
stream_format=stream_format, quality_number=quality_number
)
self._stream_url_resolver = core_ops.StreamURLResolver(
live, self._stream_param_holder
)
self._stream_fetcher = core_ops.StreamFetcher(
live, self._session, read_timeout=read_timeout
)
self._stream_parser = core_ops.StreamParser(
self._stream_param_holder, ignore_eof=stream_format != 'flv'
)
self._progress_bar = core_ops.ProgressBar(live)
self._analyser = flv_ops.Analyser()
self._metadata_provider = MetadataProvider(live, self)
self._injector = flv_ops.Injector(self._metadata_provider)
self._join_point_extractor = flv_ops.JoinPointExtractor()
self._limiter = flv_ops.Limiter(filesize_limit, duration_limit)
self._cutter = flv_ops.Cutter()
self._path_provider = PathProvider(live, out_dir, path_template)
self._dumper = flv_ops.Dumper(self._path_provider, buffer_size)
self._rec_statistics = core_ops.SizedStatistics()
self._stream_format: Final = stream_format
self._quality_number = quality_number
self._real_quality_number: Optional[QualityNumber] = None
self._api_platform: ApiPlatform = 'android'
self._use_alternative_stream: bool = False
self.buffer_size = buffer_size or io.DEFAULT_BUFFER_SIZE # bytes
self.read_timeout = read_timeout or 3 # seconds
self.disconnection_timeout = disconnection_timeout or 600 # seconds
self._prober: Union[flv_ops.Prober, core_ops.HLSProber]
self._dl_statistics: Union[core_ops.StreamStatistics, core_ops.SizedStatistics]
if stream_format == 'flv':
self._prober = flv_ops.Prober()
self._dl_statistics = core_ops.StreamStatistics()
else:
self._prober = core_ops.HLSProber()
self._dl_statistics = core_ops.SizedStatistics()
self._filesize_limit = filesize_limit or 0
self._duration_limit = duration_limit or 0
self._request_exception_handler = core_ops.RequestExceptionHandler()
self._connection_error_handler = core_ops.ConnectionErrorHandler(
live, disconnection_timeout=disconnection_timeout
)
self._exception_handler = core_ops.ExceptionHandler()
self._metadata_dumper = MetadataDumper(
self._dumper, self._analyser, self._join_point_extractor
)
self._metadata_dumper.enable()
self._stream_url: str = ''
self._stream_host: str = ''
self._subscription: abc.DisposableBase
self._threads: List[Thread] = []
self._files: List[str] = []
self._stream_profile: StreamProfile = {}
def on_file_created(args: Tuple[str, int]) -> None:
def on_profile_updated(profile: StreamProfile) -> None:
self._stream_profile = profile
self._prober.profiles.subscribe(on_profile_updated)
def on_file_opened(args: Tuple[str, int]) -> None:
logger.info(f"Video file created: '{args[0]}'")
self._files.append(args[0])
self._emit_event('video_file_created', *args)
def on_file_closed(path: str) -> None:
logger.info(f"Video file completed: '{path}'")
self._emit_event('video_file_completed', path)
self._file_manager.file_creates.subscribe(on_file_created)
self._file_manager.file_closes.subscribe(on_file_closed)
self._dumper.file_opened.subscribe(on_file_opened)
self._dumper.file_closed.subscribe(on_file_closed)
@property
def stream_url(self) -> str:
return self._stream_url
return self._stream_url_resolver.stream_url
@property
def stream_host(self) -> str:
return self._stream_host
return self._stream_url_resolver.stream_host
@property
def dl_total(self) -> int:
return self._dl_calculator.count
return self._dl_statistics.count
@property
def dl_rate(self) -> float:
return self._dl_calculator.rate
return self._dl_statistics.rate
@property
def rec_elapsed(self) -> float:
return self._rec_calculator.elapsed
return self._rec_statistics.elapsed
@property
def rec_total(self) -> int:
return self._rec_calculator.count
return self._rec_statistics.count
@property
def rec_rate(self) -> float:
return self._rec_calculator.rate
return self._rec_statistics.rate
@property
def out_dir(self) -> str:
return self._file_manager.out_dir
return self._path_provider.out_dir
@out_dir.setter
def out_dir(self, value: str) -> None:
self._file_manager.out_dir = value
self._path_provider.out_dir = value
@property
def path_template(self) -> str:
return self._file_manager.path_template
return self._path_provider.path_template
@path_template.setter
def path_template(self, value: str) -> None:
self._file_manager.path_template = value
self._path_provider.path_template = value
@property
def stream_format(self) -> StreamFormat:
return self._stream_format
return self._stream_param_holder.stream_format
@property
def quality_number(self) -> QualityNumber:
return self._quality_number
return self._stream_param_holder.quality_number
@quality_number.setter
def quality_number(self, value: QualityNumber) -> None:
self._quality_number = value
self._stream_param_holder.quality_number = value
@property
def real_quality_number(self) -> Optional[QualityNumber]:
if self.stopped:
return None
return self._real_quality_number
return self._stream_param_holder.real_quality_number
@property
def filesize_limit(self) -> int:
if self._stream_processor is not None:
return self._stream_processor.filesize_limit
else:
return self._filesize_limit
return self._limiter.filesize_limit
@filesize_limit.setter
def filesize_limit(self, value: int) -> None:
self._filesize_limit = value
if self._stream_processor is not None:
self._stream_processor.filesize_limit = value
self._limiter.filesize_limit = value
@property
def duration_limit(self) -> int:
if self._stream_processor is not None:
return self._stream_processor.duration_limit
else:
return self._duration_limit
return self._limiter.duration_limit
@duration_limit.setter
def duration_limit(self, value: int) -> None:
self._duration_limit = value
if self._stream_processor is not None:
self._stream_processor.duration_limit = value
self._limiter.duration_limit = value
@property
def read_timeout(self) -> int:
return self._stream_fetcher.read_timeout
@read_timeout.setter
def read_timeout(self, value: int) -> None:
self._stream_fetcher.read_timeout = value
@property
def disconnection_timeout(self) -> int:
return self._connection_error_handler.disconnection_timeout
@disconnection_timeout.setter
def disconnection_timeout(self, value: int) -> None:
self._connection_error_handler.disconnection_timeout = value
@property
def buffer_size(self) -> int:
return self._dumper.buffer_size
@buffer_size.setter
def buffer_size(self, value: int) -> None:
self._dumper.buffer_size = value
@property
def recording_path(self) -> Optional[str]:
return self._file_manager.curr_path
return self._dumper.path
@property
def metadata(self) -> Optional[MetaData]:
if self._stream_processor is not None:
return self._stream_processor.metadata
else:
def metadata(self) -> Optional[flv_ops.MetaData]:
try:
return self._analyser.make_metadata()
except Exception:
return None
@property
@ -238,225 +246,58 @@ class StreamRecorderImpl(
return self._stream_profile
def has_file(self) -> bool:
return self._file_manager.has_file()
return bool(self._files)
def get_files(self) -> Iterator[str]:
yield from self._file_manager.get_files()
yield from iter(self._files)
def clear_files(self) -> None:
self._file_manager.clear_files()
self._files.clear()
def can_cut_stream(self) -> bool:
if self._stream_processor is None:
return False
return self._stream_processor.can_cut_stream()
return self._cutter.can_cut_stream()
def cut_stream(self) -> bool:
if self._stream_processor is None:
return False
return self._stream_processor.cut_stream()
return self._cutter.cut_stream()
def update_progress_bar_info(self) -> None:
if self._progress_bar is not None:
self._progress_bar.set_postfix_str(self._make_pbar_postfix())
self._progress_bar.update_bar_info()
def _reset(self) -> None:
self._dl_calculator.reset()
self._rec_calculator.reset()
self._stream_url = ''
self._stream_host = ''
self._files.clear()
self._stream_profile = {}
self._api_platform = 'android'
self._real_quality_number = None
self._use_alternative_stream = False
self._fall_back_stream_format = False
async def _do_start(self) -> None:
logger.debug('Starting stream recorder...')
self._reset()
self._thread = Thread(
target=self._run, name=f'StreamRecorder::{self._live.room_id}'
)
self._thread.start()
self._run()
logger.debug('Started stream recorder')
async def _do_stop(self) -> None:
logger.debug('Stopping stream recorder...')
if self._stream_processor is not None:
self._stream_processor.cancel()
await self._loop.run_in_executor(None, self._thread.join)
self._stream_param_holder.cancel()
thread = self._thread_factory('StreamRecorderDisposer')(
self._subscription.dispose
)
thread.start()
for thread in self._threads:
await self._loop.run_in_executor(None, thread.join, 30)
self._threads.clear()
logger.debug('Stopped stream recorder')
@abstractmethod
def _run(self) -> None:
raise NotImplementedError()
@abstractmethod
def _streaming_loop(self) -> None:
raise NotImplementedError()
def _main_loop(self) -> None:
for attempt in Retrying(
reraise=True,
retry=(
retry_if_result(lambda r: not self._stopped) |
retry_if_not_exception_type((NotImplementedError))
),
wait=wait_exponential_for_same_exceptions(max=60),
before_sleep=before_sleep_log(logger, logging.DEBUG, 'main_loop'),
):
with attempt:
try:
self._streaming_loop()
except (NoStreamAvailable, NoStreamFormatAvailable) as e:
logger.warning(f'Failed to get live stream url: {repr(e)}')
except OSError as e:
logger.critical(repr(e), exc_info=e)
if e.errno == errno.ENOSPC:
# OSError(28, 'No space left on device')
self._handle_exception(e)
self._stopped = True
except LiveRoomHidden:
logger.error('The live room has been hidden!')
self._stopped = True
except LiveRoomLocked:
logger.error('The live room has been locked!')
self._stopped = True
except LiveRoomEncrypted:
logger.error('The live room has been encrypted!')
self._stopped = True
except Exception as e:
logger.exception(e)
self._handle_exception(e)
def _rotate_api_platform(self) -> None:
if self._api_platform == 'android':
self._api_platform = 'web'
else:
self._api_platform = 'android'
@retry(
reraise=True,
retry=retry_if_exception_type((
asyncio.TimeoutError, aiohttp.ClientError,
)),
wait=wait_chain(wait_none(), wait_fixed(1)),
stop=stop_after_attempt(300),
)
def _get_live_stream_url(self) -> str:
fmt = self._stream_format
qn = self._real_quality_number or self.quality_number
logger.info(
f'Getting the live stream url... qn: {qn}, format: {fmt}, '
f'api platform: {self._api_platform}, '
f'use alternative stream: {self._use_alternative_stream}'
)
try:
urls = self._run_coroutine(
self._live.get_live_stream_urls(
qn,
api_platform=self._api_platform,
stream_format=fmt,
)
def _thread_factory(self, name: str) -> StartableFactory:
def factory(target: StartableTarget) -> Thread:
thread = Thread(
target=target, daemon=True, name=f'{name}::{self._live.room_id}'
)
except NoStreamQualityAvailable:
logger.info(
f'The specified stream quality ({qn}) is not available, '
'will using the original stream quality (10000) instead.'
)
self._real_quality_number = 10000
raise TryAgain
else:
logger.info(
f'Adopted the stream format ({fmt}) and quality ({qn})'
)
self._real_quality_number = qn
self._threads.append(thread)
return thread
if not self._use_alternative_stream:
url = urls[0]
else:
try:
url = urls[1]
except IndexError:
self._use_alternative_stream = False
self._rotate_api_platform()
logger.info(
'No alternative stream url available, '
'will using the primary stream url '
f'from {self._api_platform} api instead.'
)
raise TryAgain
logger.info(f"Got live stream url: '{url}'")
return url
def _defer_retry(self, seconds: float, name: str = '') -> None:
if seconds <= 0:
return
logger.debug(f'Retry {name} after {seconds} seconds')
time.sleep(seconds)
def _wait_for_connection_error(self, check_interval: int = 3) -> None:
timeout = self.disconnection_timeout
logger.info(f'Waiting {timeout} seconds for connection recovery... ')
timebase = time.monotonic()
while not self._run_coroutine(self._live.check_connectivity()):
if timeout is not None and time.monotonic() - timebase > timeout:
logger.error(f'Connection not recovered in {timeout} seconds')
self._stopped = True
break
time.sleep(check_interval)
else:
logger.info('Connection recovered')
def _make_pbar_postfix(self) -> str:
return '{room_id} - {user_name}: {room_title}'.format(
room_id=self._live.room_info.room_id,
user_name=self._live.user_info.name,
room_title=self._live.room_info.title,
)
def _make_metadata(self) -> Dict[str, Any]:
live_start_time = datetime.fromtimestamp(
self._live.room_info.live_start_time, timezone(timedelta(hours=8))
)
assert self._real_quality_number is not None
stream_quality = '{} ({}{})'.format(
get_quality_name(self._real_quality_number),
self._real_quality_number,
', bluray' if '_bluray' in self._stream_url else '',
)
return {
'Title': self._live.room_info.title,
'Artist': self._live.user_info.name,
'Date': str(live_start_time),
'Comment': f'''\
B站直播录像
主播：{self._live.user_info.name}
标题：{self._live.room_info.title}
分区：{self._live.room_info.parent_area_name} - {self._live.room_info.area_name}
房间号：{self._live.room_info.room_id}
开播时间：{live_start_time}
流主机: {self._stream_host}
流格式：{self._stream_format}
流画质：{stream_quality}
录制程序：{__prog__} v{__version__} {__github__}''',
'description': OrderedDict({
'UserId': str(self._live.user_info.uid),
'UserName': self._live.user_info.name,
'RoomId': str(self._live.room_info.room_id),
'RoomTitle': self._live.room_info.title,
'Area': self._live.room_info.area_name,
'ParentArea': self._live.room_info.parent_area_name,
'LiveStartTime': str(live_start_time),
'StreamHost': self._stream_host,
'StreamFormat': self._stream_format,
'StreamQuality': stream_quality,
'Recorder': f'{__prog__} v{__version__} {__github__}',
})
}
return factory
def _emit_event(self, name: str, *args: Any, **kwds: Any) -> None:
self._run_coroutine(self._emit(name, *args, **kwds))
@ -464,155 +305,3 @@ B站直播录像
@aio_task_with_room_id
async def _emit(self, *args: Any, **kwds: Any) -> None: # type: ignore
await super()._emit(*args, **kwds)
class StreamProxy(io.RawIOBase):
def __init__(
self,
stream: io.BufferedIOBase,
*,
read_timeout: Optional[float] = None,
) -> None:
self._stream = stream
self._read_timmeout = read_timeout
self._offset = 0
self._size_updates = Subject()
@property
def size_updates(self) -> Observable:
return self._size_updates
@property
def closed(self) -> bool:
# always return False to avoid that `ValueError: read of closed file`,
# raised from `CHECK_CLOSED(self, "read of closed file")`,
# result in losing data those remaining in the buffer.
# ref: `https://gihub.com/python/cpython/blob/63298930fb531ba2bb4f23bc3b915dbf1e17e9e1/Modules/_io/bufferedio.c#L882` # noqa
return False
def fileno(self) -> int:
return self._stream.fileno()
def readable(self) -> bool:
return True
def read(self, size: int = -1) -> bytes:
if self._stream.closed:
raise EOFError
if self._read_timmeout:
data = wait_for(
self._stream.read, args=(size, ), timeout=self._read_timmeout
)
else:
data = self._stream.read(size)
self._offset += len(data)
self._size_updates.on_next(len(data))
return data
def tell(self) -> int:
return self._offset
def readinto(self, b: Any) -> int:
if self._stream.closed:
raise EOFError
if self._read_timmeout:
n = wait_for(
self._stream.readinto, args=(b, ), timeout=self._read_timmeout
)
else:
n = self._stream.readinto(b)
self._offset += n
self._size_updates.on_next(n)
return n
def close(self) -> None:
self._stream.close()
class OutputFileManager(BaseOutputFileManager, AsyncCooperationMixin):
def __init__(
self,
live: Live,
out_dir: str,
path_template: str,
buffer_size: Optional[int] = None,
) -> None:
super().__init__(buffer_size)
self._live = live
self.out_dir = out_dir
self.path_template = path_template
self._file_creates = Subject()
self._file_closes = Subject()
@property
def file_creates(self) -> Observable:
return self._file_creates
@property
def file_closes(self) -> Observable:
return self._file_closes
def create_file(self) -> BinaryIO:
self._start_time = self._get_timestamp()
file = super().create_file()
self._file_creates.on_next((self._curr_path, self._start_time))
return file
def close_file(self) -> None:
path = self._curr_path
super().close_file()
self._file_closes.on_next(path)
def _get_timestamp(self) -> int:
try:
return self._get_server_timestamp()
except Exception as e:
logger.warning(f'Failed to get server timestamp: {repr(e)}')
return self._get_local_timestamp()
def _get_local_timestamp(self) -> int:
return int(time.time())
@retry(
reraise=True,
retry=retry_if_exception_type((
asyncio.TimeoutError, aiohttp.ClientError,
)),
wait=wait_exponential(multiplier=0.1, max=1),
stop=stop_after_delay(3),
)
def _get_server_timestamp(self) -> int:
return self._run_coroutine(self._live.get_server_timestamp())
def _make_path(self) -> str:
date_time = datetime.fromtimestamp(self._start_time)
relpath = self.path_template.format(
roomid=self._live.room_id,
uname=escape_path(self._live.user_info.name),
title=escape_path(self._live.room_info.title),
area=escape_path(self._live.room_info.area_name),
parent_area=escape_path(self._live.room_info.parent_area_name),
year=date_time.year,
month=str(date_time.month).rjust(2, '0'),
day=str(date_time.day).rjust(2, '0'),
hour=str(date_time.hour).rjust(2, '0'),
minute=str(date_time.minute).rjust(2, '0'),
second=str(date_time.second).rjust(2, '0'),
)
pathname = os.path.abspath(
os.path.expanduser(os.path.join(self.out_dir, relpath) + '.flv')
)
os.makedirs(os.path.dirname(pathname), exist_ok=True)
while os.path.exists(pathname):
root, ext = os.path.splitext(pathname)
m = re.search(r'_\((\d+)\)$', root)
if m is None:
root += '_(1)'
else:
root = re.sub(r'\(\d+\)$', f'({int(m.group(1)) + 1})', root)
pathname = root + ext
return pathname

22
src/blrec/core/stream_remuxer.py
View File

@ -98,23 +98,23 @@ class StreamRemuxer(StoppableMixin, SupportDebugMixin):
self._exception = None
try:
self._run_subprocess()
except BrokenPipeError as e:
logger.debug(repr(e))
except FFmpegError as e:
except BrokenPipeError as exc:
logger.debug(repr(exc))
except FFmpegError as exc:
if not self._stopped:
logger.warning(repr(e))
logger.warning(repr(exc))
else:
logger.debug(repr(e))
except TimeoutError as e:
logger.debug(repr(e))
except Exception as e:
logger.debug(repr(exc))
except TimeoutError as exc:
logger.debug(repr(exc))
except Exception as exc:
# OSError: [Errno 22] Invalid argument
# https://stackoverflow.com/questions/23688492/oserror-errno-22-invalid-argument-in-subprocess
if isinstance(e, OSError) and e.errno == errno.EINVAL:
if isinstance(exc, OSError) and exc.errno == errno.EINVAL:
pass
else:
self._exception = e
logger.exception(e)
self._exception = exc
logger.exception(exc)
finally:
self._stopped = True
logger.debug('Stopped stream remuxer')

1
src/blrec/data/webapp/869.0ab6b8a3f466df77.js Normal file
View File

File diff suppressed because one or more lines are too long

1
src/blrec/data/webapp/869.42b1fd9a88732b97.js
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File diff suppressed because one or more lines are too long

2
src/blrec/data/webapp/index.html
View File

@ -10,6 +10,6 @@
<body>
<app-root></app-root>
<noscript>Please enable JavaScript to continue using this application.</noscript>
<script src="runtime.3ef3795d150b06f7.js" type="module"></script><script src="polyfills.4b08448aee19bb22.js" type="module"></script><script src="main.b9234f0840c7101a.js" type="module"></script>
<script src="runtime.8ba8344712d0946d.js" type="module"></script><script src="polyfills.4b08448aee19bb22.js" type="module"></script><script src="main.b9234f0840c7101a.js" type="module"></script>
</body></html>

12
src/blrec/data/webapp/ngsw.json
View File

@ -1,6 +1,6 @@
{
"configVersion": 1,
"timestamp": 1651824752572,
"timestamp": 1653113686866,
"index": "/index.html",
"assetGroups": [
{
@ -16,13 +16,13 @@
"/45.c90c3cea2bf1a66e.js",
"/474.7f6529972e383566.js",
"/66.31f5b9ae46ae9005.js",
"/869.42b1fd9a88732b97.js",
"/869.0ab6b8a3f466df77.js",
"/common.858f777e9296e6f2.js",
"/index.html",
"/main.b9234f0840c7101a.js",
"/manifest.webmanifest",
"/polyfills.4b08448aee19bb22.js",
"/runtime.3ef3795d150b06f7.js",
"/runtime.8ba8344712d0946d.js",
"/styles.1f581691b230dc4d.css"
],
"patterns": []
@ -1639,7 +1639,7 @@
"/45.c90c3cea2bf1a66e.js": "e5bfb8cf3803593e6b8ea14c90b3d3cb6a066764",
"/474.7f6529972e383566.js": "1c74b5c6379705a3110c99767f97feddc42a0d54",
"/66.31f5b9ae46ae9005.js": "cc22d2582d8e4c2a83e089d5a1ec32619e439ccd",
"/869.42b1fd9a88732b97.js": "ca5c951f04d02218b3fe7dc5c022dad22bf36eca",
"/869.0ab6b8a3f466df77.js": "fd3e32d78790ec916177aa38b49ca32bfe62d0d4",
"/assets/animal/panda.js": "fec2868bb3053dd2da45f96bbcb86d5116ed72b1",
"/assets/animal/panda.svg": "bebd302cdc601e0ead3a6d2710acf8753f3d83b1",
"/assets/fill/.gitkeep": "da39a3ee5e6b4b0d3255bfef95601890afd80709",
@ -3234,11 +3234,11 @@
"/assets/twotone/warning.js": "fb2d7ea232f3a99bf8f080dbc94c65699232ac01",
"/assets/twotone/warning.svg": "8c7a2d3e765a2e7dd58ac674870c6655cecb0068",
"/common.858f777e9296e6f2.js": "b68ca68e1e214a2537d96935c23410126cc564dd",
"/index.html": "29cb770b0e30ea40770ce8c33c7254da20c3577b",
"/index.html": "da07776fe6f05347b1b8360f61b81c59734dcc54",
"/main.b9234f0840c7101a.js": "c8c7b588c070b957a2659f62d6a77de284aa2233",
"/manifest.webmanifest": "62c1cb8c5ad2af551a956b97013ab55ce77dd586",
"/polyfills.4b08448aee19bb22.js": "8e73f2d42cc13ca353cea5c886d930bd6da08d0d",
"/runtime.3ef3795d150b06f7.js": "c33604f420d675070ccaa5359763e8be3c434c0d",
"/runtime.8ba8344712d0946d.js": "264d0e7e1e88dd1a4383d73d401f5ccd51e40eb7",
"/styles.1f581691b230dc4d.css": "6f5befbbad57c2b2e80aae855139744b8010d150"
},
"navigationUrls": [

2
src/blrec/data/webapp/runtime.3ef3795d150b06f7.js → src/blrec/data/webapp/runtime.8ba8344712d0946d.js
View File

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4
src/blrec/disk_space/space_reclaimer.py
View File

@ -37,8 +37,8 @@ class SpaceReclaimer(SpaceEventListener, SwitchableMixin):
if value := os.environ.get('REC_TTL'):
try:
rec_ttl = int(value)
except Exception as e:
logger.warning(repr(e))
except Exception as exc:
logger.warning(repr(exc))
self.rec_ttl = rec_ttl
self.recycle_records = recycle_records

13
src/blrec/event/event_center.py
View File

@ -1,21 +1,18 @@
from reactivex import Observable, Subject
from rx.subject import Subject
from rx.core import Observable
from .typing import Event
from ..utils.patterns import Singleton
from .typing import Event
__all__ = 'EventCenter',
__all__ = ('EventCenter',)
class EventCenter(Singleton):
def __init__(self) -> None:
super().__init__()
self._source = Subject()
self._source: Subject[Event] = Subject()
@property
def events(self) -> Observable:
def events(self) -> Observable[Event]:
return self._source
def submit(self, event: Event) -> None:

11
src/blrec/exception/exception_center.py
View File

@ -1,20 +1,17 @@
from rx.subject import Subject
from rx.core import Observable
from reactivex import Observable, Subject
from ..utils.patterns import Singleton
__all__ = 'ExceptionCenter',
__all__ = ('ExceptionCenter',)
class ExceptionCenter(Singleton):
def __init__(self) -> None:
super().__init__()
self._source = Subject()
self._source: Subject[BaseException] = Subject()
@property
def exceptions(self) -> Observable:
def exceptions(self) -> Observable[BaseException]:
return self._source
def submit(self, exc: BaseException) -> None:

26
src/blrec/flv/common.py
View File

@ -1,17 +1,16 @@
from __future__ import annotations
from typing import Any, Dict, Iterable, Iterator, Mapping, Optional, Union
from typing_extensions import TypeGuard
import attr
from typing_extensions import TypeGuard
from .io import FlvReader
from .io_protocols import RandomIO
from . import scriptdata
from .avc import extract_resolution
from .io import FlvReader
from .io_protocols import RandomIO
from .models import AudioTag, AVCPacketType, FlvTag, ScriptTag, TagType, VideoTag
from .utils import OffsetRepositor
from .models import (
AVCPacketType, FlvTag, AudioTag, ScriptTag, TagType, VideoTag
)
def read_tags(
@ -54,14 +53,14 @@ def read_tags_in_duration(
def peek_tags(
file: RandomIO, reader: FlvReader, count: int, *, no_body: bool = False,
file: RandomIO, reader: FlvReader, count: int, *, no_body: bool = False
) -> Iterator[FlvTag]:
with OffsetRepositor(file):
yield from read_tags(reader, count, no_body=no_body)
def rpeek_tags(
file: RandomIO, reader: FlvReader, count: int, *, no_body: bool = False,
file: RandomIO, reader: FlvReader, count: int, *, no_body: bool = False
) -> Iterator[FlvTag]:
with OffsetRepositor(file):
yield from rread_tags(reader, count, no_body=no_body)
@ -74,9 +73,7 @@ def find_metadata_tag(tags: Iterable[FlvTag]) -> Optional[ScriptTag]:
return None
def find_header_tag(
tags: Iterable[FlvTag]
) -> Optional[Union[AudioTag, VideoTag]]:
def find_header_tag(tags: Iterable[FlvTag]) -> Optional[Union[AudioTag, VideoTag]]:
for tag in tags:
if is_sequence_header(tag):
return tag
@ -221,9 +218,7 @@ def enrich_metadata(
def update_metadata(
metadata_tag: ScriptTag,
metadata: Mapping[str, Any],
offset: Optional[int] = None,
metadata_tag: ScriptTag, metadata: Mapping[str, Any], offset: Optional[int] = None
) -> ScriptTag:
original_tag_size = metadata_tag.tag_size
new_tag = enrich_metadata(metadata_tag, metadata, offset)
@ -236,7 +231,8 @@ def ensure_order(metadata: Dict[str, Any]) -> Dict[str, Any]:
# some typical properties such as 'keyframes' must be before some custom
# properties such as 'Comment' otherwise, it won't take effect in some
# players!
from .data_analyser import MetaData
from .operators import MetaData
typical_props = attr.fields_dict(MetaData).keys()
return {
**{k: v for k, v in metadata.items() if k in typical_props},

21
src/blrec/flv/exceptions.py
View File

@ -1,4 +1,3 @@
class FlvDataError(ValueError):
...
@ -17,23 +16,3 @@ class FlvStreamCorruptedError(Exception):
class FlvFileCorruptedError(Exception):
...
class AudioParametersChanged(Exception):
...
class VideoParametersChanged(Exception):
...
class FileSizeOverLimit(Exception):
...
class DurationOverLimit(Exception):
...
class CutStream(Exception):
...

4
src/blrec/flv/helpers.py
View File

@ -7,7 +7,7 @@ from .common import (
is_audio_tag, is_metadata_tag, is_script_tag, is_video_tag, read_tags,
parse_metadata, find_metadata_tag,
)
from .stream_processor import JoinPoint
from .operators import JoinPoint
from .utils import format_timestamp
from ..path import extra_metadata_path
@ -32,7 +32,7 @@ def make_comment_for_joinpoints(join_points: Iterable[JoinPoint]) -> str:
'流中断拼接详情\n' +
'\n'.join((
'时间戳：{}, 无缝拼接：{}'.format(
format_timestamp(p.timestamp),
format_timestamp(int(p.timestamp)),
'是' if p.seamless else '否',
)
for p in join_points

84
src/blrec/flv/limit_checker.py
View File

@ -1,84 +0,0 @@
from __future__ import annotations
import logging
from typing import Optional
from .models import FlvHeader, FlvTag, BACK_POINTER_SIZE, VideoTag
from .exceptions import FileSizeOverLimit, DurationOverLimit
from .common import is_video_nalu_keyframe
__all__ = 'LimitChecker',
logger = logging.getLogger(__name__)
class LimitChecker:
def __init__(
self,
filesize_limit: int = 0, # file size in bytes, no limit by default.
duration_limit: int = 0, # duration in seconds, no limit by default.
) -> None:
self.filesize_limit = filesize_limit
self.duration_limit = duration_limit
self.reset()
def is_filesize_over_limit(self) -> bool:
return (
self._filesize + self._max_size_between_keyframes >=
self.filesize_limit
)
def is_duration_over_limit(self) -> bool:
return (
self._duration + self._max_duration_between_keyframes >=
self.duration_limit
)
@property
def last_keyframe_tag(self) -> Optional[VideoTag]:
return self._last_keyframe_tag
def reset(self) -> None:
self._filesize = 0
self._duration = 0.0
self._max_size_between_keyframes = 0
self._max_duration_between_keyframes = 0.0
self._header_checked = False
self._last_keyframe_tag: Optional[VideoTag] = None
def check_header(self, header: FlvHeader) -> None:
assert not self._header_checked
self._header_checked = True
self._filesize += header.size + BACK_POINTER_SIZE
def check_tag(self, tag: FlvTag) -> None:
self._filesize += tag.tag_size + BACK_POINTER_SIZE
self._duration = tag.timestamp / 1000
if not is_video_nalu_keyframe(tag):
return
if self._last_keyframe_tag is not None:
self._max_size_between_keyframes = max(
self._max_size_between_keyframes,
tag.offset - self._last_keyframe_tag.offset,
)
self._max_duration_between_keyframes = max(
self._max_duration_between_keyframes,
(tag.timestamp - self._last_keyframe_tag.timestamp) / 1000,
)
self._last_keyframe_tag = tag
if self.filesize_limit > 0 and self.is_filesize_over_limit():
logger.debug('File size will be over the limit: {} + {}'.format(
self._filesize, self._max_size_between_keyframes,
))
raise FileSizeOverLimit()
if self.duration_limit > 0 and self.is_duration_over_limit():
logger.debug('Duration will be over the limit: {} + {}'.format(
self._duration, self._max_duration_between_keyframes,
))
raise DurationOverLimit()

78
src/blrec/flv/metadata_dumper.py Normal file
View File

@ -0,0 +1,78 @@
import json
import logging
from contextlib import suppress
from typing import List, Optional
import attr
from ..flv import operators as flv_ops
from ..path import extra_metadata_path
from ..utils.mixins import SwitchableMixin
__all__ = ('MetadataDumper',)
logger = logging.getLogger(__name__)
class MetadataDumper(SwitchableMixin):
def __init__(
self,
dumper: flv_ops.Dumper,
analyser: flv_ops.Analyser,
joinpoint_extractor: flv_ops.JoinPointExtractor,
) -> None:
super().__init__()
self._dumper = dumper
self._analyser = analyser
self._joinpoint_extractor = joinpoint_extractor
self._last_metadata: Optional[flv_ops.MetaData] = None
self._last_join_points: Optional[List[flv_ops.JoinPoint]] = None
def _do_enable(self) -> None:
self._metadata_subscription = self._analyser.metadatas.subscribe(
self._update_metadata
)
self._join_points_subscription = (
self._joinpoint_extractor.join_points.subscribe(self._update_join_points)
)
self._file_closed_subscription = self._dumper.file_closed.subscribe(
self._dump_metadata
)
logger.debug('Enabled metadata dumper')
def _do_disable(self) -> None:
with suppress(Exception):
self._metadata_subscription.dispose()
with suppress(Exception):
self._join_points_subscription.dispose()
with suppress(Exception):
self._file_closed_subscription.dispose()
logger.debug('Disabled metadata dumper')
def _update_metadata(self, metadata: flv_ops.MetaData) -> None:
self._last_metadata = metadata
def _update_join_points(self, join_points: List[flv_ops.JoinPoint]) -> None:
self._last_join_points = join_points
def _dump_metadata(self, video_path: str) -> None:
path = extra_metadata_path(video_path)
logger.debug(f"Dumping metadata to file: '{path}'")
assert self._last_metadata is not None
assert self._last_join_points is not None
data = attr.asdict(self._last_metadata, filter=lambda a, v: v is not None)
data['joinpoints'] = list(
map(lambda p: p.to_metadata_value(), self._last_join_points)
)
try:
with open(path, 'wt', encoding='utf8') as file:
json.dump(data, file)
except Exception as e:
logger.error(f'Failed to dump metadata: {e}')
else:
logger.debug(f"Successfully dumped metadata to file: '{path}'")

60
src/blrec/flv/metadata_injection.py Normal file
View File

@ -0,0 +1,60 @@
import logging
import os
from datetime import datetime
from typing import Any, Dict
import attr
from reactivex import Observable
from reactivex import operators as ops
from ..utils import operators as utils_ops
from . import operators as flv_ops
from .helpers import make_comment_for_joinpoints
from .operators import JoinPoint
from .operators.helpers import from_file
__all__ = 'InjectingProgress', 'inject_metadata'
logger = logging.getLogger(__name__)
@attr.s(auto_attribs=True, slots=True, frozen=True)
class InjectingProgress:
count: int
total: int
def inject_metadata(
path: str, metadata: Dict[str, Any], *, show_progress: bool = False
) -> Observable[InjectingProgress]:
filesize = os.path.getsize(path)
append_comment_for_joinpoints(metadata)
root, ext = os.path.splitext(path)
temp_path = f'{root}_injecting{ext}'
filename = os.path.basename(path)
return from_file(path).pipe(
flv_ops.Injector(lambda: metadata),
flv_ops.Dumper(lambda: (temp_path, int(datetime.now().timestamp()))),
flv_ops.ProgressBar(
desc='Injecting',
postfix=filename,
total=filesize,
disable=not show_progress,
),
ops.map(lambda i: len(i)),
ops.scan(lambda acc, x: acc + x, 0),
ops.map(lambda s: InjectingProgress(s, filesize)),
utils_ops.replace(temp_path, path),
)
def append_comment_for_joinpoints(metadata: Dict[str, Any]) -> None:
if join_points := metadata.get('joinpoints'):
join_points = map(JoinPoint.from_metadata_value, join_points)
if 'Comment' in metadata:
metadata['Comment'] += '\n\n' + make_comment_for_joinpoints(join_points)
else:
metadata['Comment'] = make_comment_for_joinpoints(join_points)

148
src/blrec/flv/metadata_injector.py
View File

@ -1,148 +0,0 @@
import os
import logging
from typing import Any, Dict, Optional
import attr
from rx import create, operators as op
from rx.subject import Subject
from rx.core import Observable
from rx.core.typing import Observer, Scheduler, Disposable
from rx.scheduler.currentthreadscheduler import CurrentThreadScheduler
from tqdm import tqdm
from .stream_processor import StreamProcessor, BaseOutputFileManager, JoinPoint
from .helpers import get_metadata, make_comment_for_joinpoints
from ..logging.room_id import with_room_id
__all__ = 'MetadataInjector', 'InjectProgress', 'inject_metadata'
logger = logging.getLogger(__name__)
@attr.s(auto_attribs=True, slots=True, frozen=True)
class InjectProgress:
time: int
duration: int
class MetadataInjector:
def __init__(self, in_path: str, out_path: str) -> None:
self._in_path = in_path
self._file_manager = OutputFileManager(out_path)
self._duration: int = 0
self._progress_updates = Subject()
@property
def progress_updates(self) -> Observable:
return self._progress_updates
def inject(self, in_metadata: Dict[str, Any]) -> None:
metadata = get_metadata(self._in_path)
metadata.update(in_metadata)
self._duration = int(float(metadata['duration']) * 1000)
self._progress_updates.on_next(InjectProgress(0, self._duration))
self._append_comment_for_joinpoints(metadata)
processor = StreamProcessor(
self._file_manager,
metadata=metadata,
disable_limit=True,
)
def update_progress(time: int) -> None:
progress = InjectProgress(time, self._duration)
self._progress_updates.on_next(progress)
processor.time_updates.subscribe(update_progress)
with open(self._in_path, 'rb') as in_file:
processor.process_stream(in_file)
processor.finalize()
progress = InjectProgress(self._duration, self._duration)
self._progress_updates.on_next(progress)
@staticmethod
def _append_comment_for_joinpoints(metadata: Dict[str, Any]) -> None:
if (join_points := metadata.get('joinpoints')):
join_points = map(JoinPoint.from_metadata_value, join_points)
if 'Comment' in metadata:
metadata['Comment'] += '\n\n' + \
make_comment_for_joinpoints(join_points)
else:
metadata['Comment'] = make_comment_for_joinpoints(join_points)
class OutputFileManager(BaseOutputFileManager):
def __init__(self, out_path: str) -> None:
super().__init__()
self._out_path = out_path
def _make_path(self) -> str:
return self._out_path
def inject_metadata(
path: str,
metadata: Dict[str, Any],
*,
report_progress: bool = False,
room_id: Optional[int] = None,
) -> Observable:
def subscribe(
observer: Observer[InjectProgress],
scheduler: Optional[Scheduler] = None,
) -> Disposable:
_scheduler = scheduler or CurrentThreadScheduler.singleton()
def action(scheduler, state): # type: ignore
root, ext = os.path.splitext(path)
out_path = f'{root}_inject_metadata{ext}'
injector = MetadataInjector(path, out_path)
file_name = os.path.basename(path)
with tqdm(desc='Injecting', unit='ms', postfix=file_name) as pbar:
def reset(progress: InjectProgress) -> None:
pbar.reset(progress.duration)
def update(progress: InjectProgress) -> None:
pbar.update(progress.time - pbar.n)
injector.progress_updates.pipe(op.first()).subscribe(reset)
injector.progress_updates.pipe(op.skip(1)).subscribe(update)
if report_progress:
injector.progress_updates.subscribe(
lambda p: observer.on_next(p)
)
try:
logger.info(f"Injecting metadata for '{path}' ...")
injector.inject(metadata)
except Exception as e:
logger.error(
f"Failed to inject metadata for '{path}': {repr(e)}"
)
observer.on_error(e)
else:
logger.info(f"Successfully inject metadata for '{path}'")
try:
os.replace(out_path, path)
except Exception as e:
logger.error(
f"Failed to replace file {path} with '{out_path}'"
)
observer.on_error(e)
else:
observer.on_completed()
if room_id is not None:
return _scheduler.schedule(with_room_id(room_id)(action))
else:
return _scheduler.schedule(action)
return create(subscribe)

6
src/blrec/flv/models.py
View File

@ -106,6 +106,9 @@ class FlvHeader:
else:
self.type_flag &= ~0b0000_0100
def __len__(self) -> int:
return self.size
@property
def size(self) -> int:
return self.data_offset
@ -151,6 +154,9 @@ class FlvTag(ABC, FlvTagHeader):
offset: int = attr.ib(validator=[non_negative_integer_validator])
body: Optional[bytes] = attr.ib(default=None, repr=cksum)
def __len__(self) -> int:
return self.tag_size
@property
@abstractmethod
def header_size(self) -> int:

38
src/blrec/flv/operators/__init__.py Normal file
View File

@ -0,0 +1,38 @@
from .analyse import Analyser, KeyFrames, MetaData
from .concat import JoinPoint, JoinPointData, JoinPointExtractor, concat
from .correct import correct
from .cut import Cutter
from .defragment import defragment
from .dump import Dumper
from .fix import fix
from .inject import Injector
from .limit import Limiter
from .parse import parse
from .probe import Prober, StreamProfile
from .process import process
from .progress import ProgressBar
from .split import split
__all__ = (
'Analyser',
'concat',
'concat',
'correct',
'Cutter',
'defragment',
'Dumper',
'fix',
'Injector',
'JoinPoint',
'JoinPointData',
'JoinPointExtractor',
'KeyFrames',
'Limiter',
'MetaData',
'parse',
'Prober',
'process',
'ProgressBar',
'split',
'StreamProfile',
)

568
src/blrec/flv/data_analyser.py → src/blrec/flv/operators/analyse.py
View File

@ -1,237 +1,331 @@
"""
Analyse FLV file to make MetaData
ref: https://github.com/ioppermann/yamdi/blob/master/yamdi.c
"""
from __future__ import annotations
from typing import List, Optional
import attr
from .models import (
AudioTag, FlvHeader, FlvTag, SoundType, VideoTag, ScriptTag,
BACK_POINTER_SIZE
)
from .common import Resolution, is_audio_tag, is_script_tag, is_video_tag
__all__ = 'DataAnalyser', 'MetaData', 'KeyFrames'
@attr.s(auto_attribs=True, slots=True, frozen=True, kw_only=True)
class KeyFrames:
times: List[float]
filepositions: List[float]
@attr.s(auto_attribs=True, slots=True, frozen=True, kw_only=True)
class MetaData:
hasAudio: bool
hasVideo: bool
hasMetadata: bool
hasKeyframes: bool
canSeekToEnd: bool
duration: float
datasize: float
filesize: float
audiosize: Optional[float] = None
audiocodecid: Optional[float] = None
audiodatarate: Optional[float] = None
audiosamplerate: Optional[float] = None
audiosamplesize: Optional[float] = None
stereo: Optional[bool] = None
videosize: float
framerate: float
videocodecid: float
videodatarate: float
width: float
height: float
lasttimestamp: float
lastkeyframelocation: float
lastkeyframetimestamp: float
keyframes: KeyFrames
class DataAnalyser:
def __init__(self) -> None:
self.reset()
def reset(self) -> None:
self._num_of_tags = 0
self._num_of_audio_tags = 0
self._num_of_video_tags = 0
self._size_of_tags = 0
self._size_of_audio_tags = 0
self._size_of_video_tags = 0
self._size_of_data = 0
self._size_of_audio_data = 0
self._size_of_video_data = 0
self._last_timestamp = 0
self._last_timestamp_of_audio = 0
self._last_timestamp_of_video = 0
self._keyframe_timestamps: List[int] = []
self._keyframe_filepositions: List[int] = []
self._resolution: Optional[Resolution] = None
self._has_audio = False
self._has_video = False
self._header_analysed = False
self._audio_analysed = False
self._video_analysed = False
@property
def last_timestamp(self) -> int:
return self._last_timestamp
def analyse_header(self, header: FlvHeader) -> None:
assert not self._header_analysed
self._header_analysed = True
self._size_of_flv_header = header.size
def analyse_tag(self, tag: FlvTag) -> None:
if is_audio_tag(tag):
self._analyse_audio_tag(tag)
elif is_video_tag(tag):
self._analyse_video_tag(tag)
elif is_script_tag(tag):
self._analyse_script_tag(tag)
else:
raise ValueError('Invalid tag type')
self._num_of_tags += 1
self._size_of_tags += tag.tag_size
self._size_of_data += tag.data_size
self._last_timestamp = tag.timestamp
def get_real_resolution(self) -> Optional[Resolution]:
return self._resolution
def calc_frame_rate(self) -> float:
try:
return (
self._num_of_video_tags / self._last_timestamp_of_video * 1000
)
except ZeroDivisionError:
return 0.0
def calc_audio_data_rate(self) -> float:
try:
return self._size_of_audio_data * 8 / self._last_timestamp_of_audio
except ZeroDivisionError:
return 0.0
def calc_video_data_rate(self) -> float:
try:
return self._size_of_video_data * 8 / self._last_timestamp_of_video
except ZeroDivisionError:
return 0.0
def calc_data_size(self) -> int:
return (
self._size_of_audio_tags +
self._num_of_audio_tags * BACK_POINTER_SIZE +
self._size_of_video_tags +
self._num_of_video_tags * BACK_POINTER_SIZE
)
def calc_file_size(self) -> int:
return (
self._size_of_flv_header + BACK_POINTER_SIZE +
self._size_of_tags + self._num_of_tags * BACK_POINTER_SIZE
)
def make_keyframes(self) -> KeyFrames:
return KeyFrames(
times=list(map(lambda t: t / 1000, self._keyframe_timestamps)),
filepositions=list(map(float, self._keyframe_filepositions)),
)
def make_metadata(self) -> MetaData:
assert self._header_analysed
assert self._has_audio == self._audio_analysed
assert self._has_video and self._video_analysed
assert self._resolution is not None
if not self._has_audio:
audiosize = None
audiocodecid = None
audiodatarate = None
audiosamplerate = None
audiosamplesize = None
stereo = None
else:
audiosize = float(self._size_of_audio_tags)
audiocodecid = float(self._audio_codec_id)
audiodatarate = self.calc_audio_data_rate()
audiosamplerate = float(self._audio_sample_rate)
audiosamplesize = float(self._audio_sample_size)
stereo = self._stereo
keyframes = self.make_keyframes()
return MetaData(
hasAudio=self._has_audio,
hasVideo=self._has_video,
hasMetadata=True,
hasKeyframes=len(self._keyframe_timestamps) != 0,
canSeekToEnd=(
self._last_timestamp_of_video == self._keyframe_timestamps[-1]
),
duration=self._last_timestamp / 1000,
datasize=float(self.calc_data_size()),
filesize=float(self.calc_file_size()),
audiosize=audiosize,
audiocodecid=audiocodecid,
audiodatarate=audiodatarate,
audiosamplerate=audiosamplerate,
audiosamplesize=audiosamplesize,
stereo=stereo,
videosize=float(self._size_of_video_tags),
framerate=self.calc_frame_rate(),
videocodecid=float(self._video_codec_id),
videodatarate=self.calc_video_data_rate(),
width=float(self._resolution.width),
height=float(self._resolution.height),
lasttimestamp=self._last_timestamp / 1000,
lastkeyframelocation=keyframes.filepositions[-1],
lastkeyframetimestamp=keyframes.times[-1],
keyframes=keyframes,
)
def _analyse_audio_tag(self, tag: AudioTag) -> None:
if not self._audio_analysed:
self._has_audio = True
self._audio_analysed = True
self._audio_codec_id = tag.sound_format.value
self._audio_sample_rate = tag.sound_rate.value
self._audio_sample_size = tag.sound_size.value
self._stereo = tag.sound_type == SoundType.STEREO
self._num_of_audio_tags += 1
self._size_of_audio_tags += tag.tag_size
self._size_of_audio_data += tag.data_size
self._last_timestamp_of_audio = tag.timestamp
def _analyse_video_tag(self, tag: VideoTag) -> None:
if tag.is_keyframe():
self._keyframe_timestamps.append(tag.timestamp)
self._keyframe_filepositions.append(tag.offset)
if tag.is_avc_header():
self._resolution = Resolution.from_aac_sequence_header(tag)
else:
pass
if not self._video_analysed:
self._has_video = True
self._video_analysed = True
self._video_codec_id = tag.codec_id.value
self._num_of_video_tags += 1
self._size_of_video_tags += tag.tag_size
self._size_of_video_data += tag.data_size
self._last_timestamp_of_video = tag.timestamp
def _analyse_script_tag(self, tag: ScriptTag) -> None:
pass
"""
Analyse the FLV stream to make MetaData
ref: https://github.com/ioppermann/yamdi/blob/master/yamdi.c
"""
from __future__ import annotations
import logging
from typing import List, Optional, TypedDict
import attr
from reactivex import Observable, Subject, abc
from reactivex.disposable import CompositeDisposable, Disposable, SerialDisposable
from ..common import Resolution, is_audio_tag, is_script_tag, is_video_tag
from ..models import (
BACK_POINTER_SIZE,
AudioTag,
FlvHeader,
FlvTag,
ScriptTag,
SoundType,
VideoTag,
)
from .typing import FLVStream, FLVStreamItem
__all__ = 'Analyser', 'MetaData', 'KeyFrames'
logger = logging.getLogger(__name__)
@attr.s(auto_attribs=True, slots=True, frozen=True, kw_only=True)
class KeyFrames:
times: List[float]
filepositions: List[float]
class KeyFramesDict(TypedDict):
times: List[float]
filepositions: List[float]
@attr.s(auto_attribs=True, slots=True, frozen=True, kw_only=True)
class MetaData:
hasAudio: bool
hasVideo: bool
hasMetadata: bool
hasKeyframes: bool
canSeekToEnd: bool
duration: float
datasize: float
filesize: float
audiosize: Optional[float] = None
audiocodecid: Optional[float] = None
audiodatarate: Optional[float] = None
audiosamplerate: Optional[float] = None
audiosamplesize: Optional[float] = None
stereo: Optional[bool] = None
videosize: float
framerate: float
videocodecid: float
videodatarate: float
width: float
height: float
lasttimestamp: float
lastkeyframelocation: float
lastkeyframetimestamp: float
keyframes: KeyFrames
class MetaDataDict:
hasAudio: bool
hasVideo: bool
hasMetadata: bool
hasKeyframes: bool
canSeekToEnd: bool
duration: float
datasize: float
filesize: float
audiosize: Optional[float] = None
audiocodecid: Optional[float] = None
audiodatarate: Optional[float] = None
audiosamplerate: Optional[float] = None
audiosamplesize: Optional[float] = None
stereo: Optional[bool] = None
videosize: float
framerate: float
videocodecid: float
videodatarate: float
width: float
height: float
lasttimestamp: float
lastkeyframelocation: float
lastkeyframetimestamp: float
keyframes: KeyFramesDict
class Analyser:
def __init__(self) -> None:
self._metadatas: Subject[MetaData] = Subject()
self._reset()
def _reset(self) -> None:
self._num_of_tags = 0
self._num_of_audio_tags = 0
self._num_of_video_tags = 0
self._size_of_tags = 0
self._size_of_audio_tags = 0
self._size_of_video_tags = 0
self._size_of_data = 0
self._size_of_audio_data = 0
self._size_of_video_data = 0
self._last_timestamp = 0
self._last_timestamp_of_audio = 0
self._last_timestamp_of_video = 0
self._keyframe_timestamps: List[int] = []
self._keyframe_filepositions: List[int] = []
self._resolution: Optional[Resolution] = None
self._has_audio = False
self._has_video = False
self._audio_analysed = False
self._video_analysed = False
@property
def metadatas(self) -> Observable[MetaData]:
return self._metadatas
def __call__(self, source: FLVStream) -> FLVStream:
return self._analyse(source)
def get_real_resolution(self) -> Optional[Resolution]:
return self._resolution
def calc_frame_rate(self) -> float:
try:
return self._num_of_video_tags / self._last_timestamp_of_video * 1000
except ZeroDivisionError:
return 0.0
def calc_audio_data_rate(self) -> float:
try:
return self._size_of_audio_data * 8 / self._last_timestamp_of_audio
except ZeroDivisionError:
return 0.0
def calc_video_data_rate(self) -> float:
try:
return self._size_of_video_data * 8 / self._last_timestamp_of_video
except ZeroDivisionError:
return 0.0
def calc_data_size(self) -> int:
return (
self._size_of_audio_tags
+ self._num_of_audio_tags * BACK_POINTER_SIZE
+ self._size_of_video_tags
+ self._num_of_video_tags * BACK_POINTER_SIZE
)
def calc_file_size(self) -> int:
return (
self._size_of_flv_header
+ BACK_POINTER_SIZE
+ self._size_of_tags
+ self._num_of_tags * BACK_POINTER_SIZE
)
def make_keyframes(self) -> KeyFrames:
return KeyFrames(
times=list(map(lambda t: t / 1000, self._keyframe_timestamps)),
filepositions=list(map(float, self._keyframe_filepositions)),
)
def make_metadata(self) -> MetaData:
assert self._has_audio == self._audio_analysed
assert self._has_video and self._video_analysed
assert self._resolution is not None
if not self._has_audio:
audiosize = None
audiocodecid = None
audiodatarate = None
audiosamplerate = None
audiosamplesize = None
stereo = None
else:
audiosize = float(self._size_of_audio_tags)
audiocodecid = float(self._audio_codec_id)
audiodatarate = self.calc_audio_data_rate()
audiosamplerate = float(self._audio_sample_rate)
audiosamplesize = float(self._audio_sample_size)
stereo = self._stereo
keyframes = self.make_keyframes()
return MetaData(
hasAudio=self._has_audio,
hasVideo=self._has_video,
hasMetadata=True,
hasKeyframes=len(self._keyframe_timestamps) != 0,
canSeekToEnd=(
self._last_timestamp_of_video == self._keyframe_timestamps[-1]
),
duration=self._last_timestamp / 1000,
datasize=float(self.calc_data_size()),
filesize=float(self.calc_file_size()),
audiosize=audiosize,
audiocodecid=audiocodecid,
audiodatarate=audiodatarate,
audiosamplerate=audiosamplerate,
audiosamplesize=audiosamplesize,
stereo=stereo,
videosize=float(self._size_of_video_tags),
framerate=self.calc_frame_rate(),
videocodecid=float(self._video_codec_id),
videodatarate=self.calc_video_data_rate(),
width=float(self._resolution.width),
height=float(self._resolution.height),
lasttimestamp=self._last_timestamp / 1000,
lastkeyframelocation=keyframes.filepositions[-1],
lastkeyframetimestamp=keyframes.times[-1],
keyframes=keyframes,
)
def _analyse(self, source: FLVStream) -> FLVStream:
def subscribe(
observer: abc.ObserverBase[FLVStreamItem],
scheduler: Optional[abc.SchedulerBase] = None,
) -> abc.DisposableBase:
stream_index: int = -1
subscription = SerialDisposable()
def push_metadata() -> None:
try:
metadata = self.make_metadata()
except Exception as e:
logger.warning(f'Failed to make metadata: {repr(e)}')
pass
else:
self._metadatas.on_next(metadata)
def on_next(item: FLVStreamItem) -> None:
nonlocal stream_index
if isinstance(item, FlvHeader):
stream_index += 1
if stream_index > 0:
push_metadata()
self._reset()
self._analyse_flv_header(item)
else:
self._analyse_tag(item)
observer.on_next(item)
def on_completed() -> None:
push_metadata()
observer.on_completed()
def on_error(e: Exception) -> None:
push_metadata()
observer.on_error(e)
def dispose() -> None:
push_metadata()
subscription.disposable = source.subscribe(
on_next, on_error, on_completed, scheduler=scheduler
)
return CompositeDisposable(subscription, Disposable(dispose))
return Observable(subscribe)
def _analyse_flv_header(self, header: FlvHeader) -> None:
self._size_of_flv_header = header.size
def _analyse_tag(self, tag: FlvTag) -> None:
if is_audio_tag(tag):
self._analyse_audio_tag(tag)
elif is_video_tag(tag):
self._analyse_video_tag(tag)
elif is_script_tag(tag):
self._analyse_script_tag(tag)
else:
logger.warning(f'Invalid tag type: {tag}')
self._num_of_tags += 1
self._size_of_tags += tag.tag_size
self._size_of_data += tag.data_size
self._last_timestamp = tag.timestamp
def _analyse_audio_tag(self, tag: AudioTag) -> None:
if not self._audio_analysed:
self._has_audio = True
self._audio_analysed = True
self._audio_codec_id = tag.sound_format.value
self._audio_sample_rate = tag.sound_rate.value
self._audio_sample_size = tag.sound_size.value
self._stereo = tag.sound_type == SoundType.STEREO
self._num_of_audio_tags += 1
self._size_of_audio_tags += tag.tag_size
self._size_of_audio_data += tag.data_size
self._last_timestamp_of_audio = tag.timestamp
def _analyse_video_tag(self, tag: VideoTag) -> None:
if tag.is_keyframe():
self._keyframe_timestamps.append(tag.timestamp)
self._keyframe_filepositions.append(self.calc_file_size())
if tag.is_avc_header():
self._resolution = Resolution.from_aac_sequence_header(tag)
else:
pass
if not self._video_analysed:
self._has_video = True
self._video_analysed = True
self._video_codec_id = tag.codec_id.value
self._num_of_video_tags += 1
self._size_of_video_tags += tag.tag_size
self._size_of_video_data += tag.data_size
self._last_timestamp_of_video = tag.timestamp
def _analyse_script_tag(self, tag: ScriptTag) -> None:
pass

406
src/blrec/flv/operators/concat.py Normal file
View File

@ -0,0 +1,406 @@
from __future__ import annotations
import logging
from enum import IntEnum, auto
from typing import Callable, List, Optional, TypedDict, cast
import attr
from reactivex import Observable, Subject, abc
from reactivex.disposable import CompositeDisposable, Disposable, SerialDisposable
from typing_extensions import TypeGuard
from ...utils.hash import cksum
from ..common import (
create_script_tag,
is_audio_sequence_header,
is_metadata_tag,
is_script_tag,
is_sequence_header,
is_video_sequence_header,
parse_scriptdata,
)
from ..models import AudioTag, FlvHeader, FlvTag, ScriptTag, VideoTag
from ..scriptdata import ScriptData
from ..utils import format_timestamp
from .typing import FLVStream, FLVStreamItem
__all__ = ('concat', 'JoinPointExtractor', 'JoinPoint', 'JoinPointData')
logger = logging.getLogger(__name__)
@attr.s(auto_attribs=True, slots=True, frozen=True)
class JoinPoint:
seamless: bool
timestamp: float # timestamp of previous tag in milliseconds
crc32: str # crc32 of the previous tag
@classmethod
def from_metadata_value(cls, value: JoinPointData) -> JoinPoint:
return cls(
timestamp=int(value['timestamp']),
seamless=value['seamless'],
crc32=value['crc32'],
)
def to_metadata_value(self) -> JoinPointData:
return dict(
timestamp=float(self.timestamp), seamless=self.seamless, crc32=self.crc32
)
def __str__(self) -> str:
return 'seamless: {}, timestamp: {}, crc32: {}'.format(
'yes' if self.seamless else 'no',
format_timestamp(int(self.timestamp)),
self.crc32,
)
class JoinPointData(TypedDict):
seamless: bool
timestamp: float
crc32: str
class ACTION(IntEnum):
NOOP = auto()
CORRECT = auto()
GATHER = auto()
CANCEL = auto()
CONCAT = auto()
CONCAT_AND_GATHER = auto()
def concat(
num_of_last_tags: int = 3, max_duration: int = 20_000
) -> Callable[[FLVStream], FLVStream]:
"""Concat FLV streams.
num_of_last_tags: Number of tags for determining whether or not tags are duplicated
max_duration: Max duration in milliseconds the duplicated tags might last
"""
def _concat(source: FLVStream) -> FLVStream:
def subscribe(
observer: abc.ObserverBase[FLVStreamItem],
scheduler: Optional[abc.SchedulerBase] = None,
) -> abc.DisposableBase:
delta: int = 0
action: ACTION = ACTION.NOOP
last_tags: List[FlvTag] = []
gathered_tags: List[FlvTag] = []
last_flv_header: Optional[FlvHeader] = None
last_audio_sequence_header: Optional[AudioTag] = None
last_video_sequence_header: Optional[VideoTag] = None
def update_last_tags(tag: FlvTag) -> None:
nonlocal last_audio_sequence_header, last_video_sequence_header
last_tags.append(tag)
if len(last_tags) > num_of_last_tags:
last_tags.pop(0)
if is_audio_sequence_header(tag):
last_audio_sequence_header = tag
elif is_video_sequence_header(tag):
last_video_sequence_header = tag
def gather_tags(tag: FlvTag) -> None:
nonlocal gathered_tags
nonlocal action
nonlocal last_audio_sequence_header, last_video_sequence_header
if is_audio_sequence_header(tag):
if last_audio_sequence_header is None:
logger.debug(
'Cancel concat due to no last audio sequence header'
)
action = ACTION.CANCEL
else:
if not tag.is_the_same_as(last_audio_sequence_header):
action = ACTION.CANCEL
logger.debug(
'Cancel concat due to audio sequence header changed'
)
last_audio_sequence_header = tag
elif is_video_sequence_header(tag):
if last_video_sequence_header is None:
logger.debug(
'Cancel concat due to no last video sequence header'
)
action = ACTION.CANCEL
else:
if not tag.is_the_same_as(last_video_sequence_header):
action = ACTION.CANCEL
logger.debug(
'Cancel concat due to video sequence header changed'
)
last_video_sequence_header = tag
gathered_tags.append(tag)
def has_gathering_completed() -> bool:
# XXX: timestamp MUST start from 0 and continuous!
# put the correct and fix operator on upstream of this operator
# to ensure timestamp start from 0 and continuous!
return gathered_tags[-1].timestamp >= max_duration
def find_last_duplicated_tag(tags: List[FlvTag]) -> int:
logger.debug('Finding duplicated tags...')
last_out_tag = last_tags[-1]
logger.debug(f'The last output tag is {last_out_tag}')
for idx, tag in enumerate(tags):
if not tag.is_the_same_as(last_out_tag):
continue
if not all(
map(
lambda t: t[0].is_the_same_as(t[1]),
zip(
tags[max(0, idx - (len(last_tags) - 1)) : idx],
last_tags[:-1],
),
)
):
continue
logger.debug(f'The last duplicated tag found at {idx} is {tag}')
return idx
logger.debug('No duplicated tag found')
return -1
def update_delta_duplicated(last_duplicated_tag: FlvTag) -> None:
nonlocal delta
delta = last_tags[-1].timestamp - last_duplicated_tag.timestamp
def update_delta_no_duplicated(first_data_tag: FlvTag) -> None:
nonlocal delta
delta = last_tags[-1].timestamp - first_data_tag.timestamp + 10
def correct_ts(tag: FlvTag) -> FlvTag:
if delta == 0:
return tag
return tag.evolve(timestamp=tag.timestamp + delta)
def make_join_point_tag(tag: FlvTag, seamless: bool) -> ScriptTag:
assert tag.body is not None
join_point = JoinPoint(
seamless=seamless,
timestamp=float(tag.timestamp),
crc32=cksum(tag.body),
)
script_data = ScriptData(
name='onJoinPoint', value=attr.asdict(join_point)
)
script_tag = create_script_tag(script_data)
return script_tag
def do_concat() -> None:
logger.debug(
'Concatenating... gathered {} tags, total size: {}'.format(
len(gathered_tags), sum(t.tag_size for t in gathered_tags)
)
)
tags = list(
filter(
lambda tag: not is_metadata_tag(tag)
and not is_sequence_header(tag),
gathered_tags,
)
)
logger.debug(
'{} data tags, total size: {}'.format(
len(tags), sum(t.tag_size for t in tags)
)
)
if not tags:
return
if (index := find_last_duplicated_tag(tags)) >= 0:
seamless = True
update_delta_duplicated(tags[index])
logger.debug(f'Updated delta: {delta}, seamless: {seamless}')
tags = tags[index + 1 :]
else:
seamless = False
update_delta_no_duplicated(tags[0])
logger.debug(f'Updated delta: {delta}, seamless: {seamless}')
join_point_tag = make_join_point_tag(last_tags[-1], seamless)
observer.on_next(join_point_tag)
for tag in tags:
tag = correct_ts(tag)
update_last_tags(tag)
observer.on_next(tag)
gathered_tags.clear()
def do_cancel() -> None:
logger.debug(
'Cancelling... gathered {} tags, total size: {}'.format(
len(gathered_tags), sum(t.tag_size for t in gathered_tags)
)
)
assert last_flv_header is not None
observer.on_next(last_flv_header)
for tag in gathered_tags:
update_last_tags(tag)
observer.on_next(tag)
gathered_tags.clear()
def on_next(item: FLVStreamItem) -> None:
nonlocal action
nonlocal last_flv_header
if isinstance(item, FlvHeader):
if last_flv_header is None:
logger.debug('No operation needed for the first stream')
last_flv_header = item
action = ACTION.NOOP
observer.on_next(item)
else:
logger.debug('Gathering tags for deduplication...')
last_flv_header = item
if action == ACTION.GATHER:
action = ACTION.CONCAT_AND_GATHER
else:
action = ACTION.GATHER
return
tag = item
while True:
if action == ACTION.NOOP:
update_last_tags(tag)
observer.on_next(tag)
return
if action == ACTION.CORRECT:
tag = correct_ts(tag)
update_last_tags(tag)
observer.on_next(tag)
return
if action in (ACTION.CONCAT, ACTION.CONCAT_AND_GATHER):
do_concat()
if action == ACTION.CONCAT_AND_GATHER:
action = ACTION.GATHER
else:
action = ACTION.CORRECT
return
if action == ACTION.GATHER:
gather_tags(tag)
if action == ACTION.CANCEL:
do_cancel()
action = ACTION.NOOP
return
if has_gathering_completed():
action = ACTION.CONCAT
continue
break
def on_completed() -> None:
if action == ACTION.GATHER:
do_concat()
observer.on_completed()
def on_error(e: Exception) -> None:
if action == ACTION.GATHER:
do_concat()
observer.on_error(e)
return source.subscribe(
on_next, on_error, on_completed, scheduler=scheduler
)
return Observable(subscribe)
return _concat
class JoinPointExtractor:
def __init__(self) -> None:
self._join_points: Subject[List[JoinPoint]] = Subject()
@property
def join_points(self) -> Observable[List[JoinPoint]]:
return self._join_points
def __call__(self, source: FLVStream) -> FLVStream:
return self._extract(source)
def _extract(self, source: FLVStream) -> FLVStream:
def subscribe(
observer: abc.ObserverBase[FLVStreamItem],
scheduler: Optional[abc.SchedulerBase] = None,
) -> abc.DisposableBase:
stream_index: int = -1
subscription = SerialDisposable()
join_points: List[JoinPoint] = []
join_point_tag: Optional[ScriptTag] = None
def push_join_points() -> None:
self._join_points.on_next(join_points.copy())
def on_next(item: FLVStreamItem) -> None:
nonlocal stream_index
nonlocal join_point_tag
if isinstance(item, FlvHeader):
stream_index += 1
if stream_index > 0:
push_join_points()
join_points.clear()
join_point_tag = None
observer.on_next(item)
return
if join_point_tag:
join_point = self._make_join_point(join_point_tag, item)
join_points.append(join_point)
logger.debug(f'{repr(join_point)}; {join_point}')
join_point_tag = None
if self._is_join_point_tag(item):
join_point_tag = item
return
observer.on_next(item)
def on_completed() -> None:
push_join_points()
observer.on_completed()
def on_error(e: Exception) -> None:
push_join_points()
observer.on_error(e)
def dispose() -> None:
push_join_points()
subscription.disposable = source.subscribe(
on_next, on_error, on_completed, scheduler=scheduler
)
return CompositeDisposable(subscription, Disposable(dispose))
return Observable(subscribe)
def _is_join_point_tag(self, tag: FlvTag) -> TypeGuard[ScriptTag]:
if is_script_tag(tag):
script_data = parse_scriptdata(tag)
return script_data['name'] == 'onJoinPoint'
return False
def _make_join_point(self, join_point_tag: ScriptTag, tag: FlvTag) -> JoinPoint:
assert tag.body is not None
script_data = parse_scriptdata(join_point_tag)
join_point_data = cast(JoinPointData, script_data['value'])
return JoinPoint(
seamless=join_point_data['seamless'],
timestamp=tag.timestamp,
crc32=cksum(tag.body),
)

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src/blrec/flv/operators/correct.py Normal file
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import logging
from typing import Callable, Optional
from reactivex import Observable, abc
from ..common import is_script_tag, is_sequence_header
from ..models import FlvHeader, FlvTag
from .typing import FLVStream, FLVStreamItem
__all__ = ('correct',)
logger = logging.getLogger(__name__)
def correct() -> Callable[[FLVStream], FLVStream]:
def _correct(source: FLVStream) -> FLVStream:
"""Correct the timestamp offset of the FLV tags."""
def subscribe(
observer: abc.ObserverBase[FLVStreamItem],
scheduler: Optional[abc.SchedulerBase] = None,
) -> abc.DisposableBase:
delta: Optional[int] = None
def correct_ts(tag: FlvTag, delta: int) -> FlvTag:
if delta == 0:
return tag
return tag.evolve(timestamp=tag.timestamp + delta)
def on_next(item: FLVStreamItem) -> None:
nonlocal delta
if isinstance(item, FlvHeader):
delta = None
observer.on_next(item)
return
tag = item
if is_script_tag(tag):
tag = correct_ts(tag, -tag.timestamp)
observer.on_next(tag)
return
if delta is None:
if is_sequence_header(tag):
tag = correct_ts(tag, -tag.timestamp)
else:
logger.debug(f'The first data tag: {tag}')
delta = -tag.timestamp
logger.debug(f'Timestamp delta: {delta}')
tag = correct_ts(tag, delta)
else:
tag = correct_ts(tag, delta)
observer.on_next(tag)
return source.subscribe(
on_next, observer.on_error, observer.on_completed, scheduler=scheduler
)
return Observable(subscribe)
return _correct

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src/blrec/flv/operators/cut.py Normal file
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from __future__ import annotations
import logging
from typing import Optional
from reactivex import Observable, abc
from ..common import (
is_audio_sequence_header,
is_metadata_tag,
is_video_nalu_keyframe,
is_video_sequence_header,
)
from ..models import AudioTag, FlvHeader, FlvTag, ScriptTag, VideoTag
from ..utils import format_timestamp
from .correct import correct
from .typing import FLVStream, FLVStreamItem
__all__ = ('Cutter',)
logger = logging.getLogger(__name__)
class Cutter:
def __init__(self, min_duration: int = 5_000) -> None:
self._min_duration = min_duration # milliseconds
self._reset()
def _reset(self) -> None:
self._cutting: bool = False
self._triggered: bool = False
self._last_timestamp: int = 0
self._last_flv_header: Optional[FlvHeader] = None
self._last_metadata_tag: Optional[ScriptTag] = None
self._last_audio_sequence_header: Optional[AudioTag] = None
self._last_video_sequence_header: Optional[VideoTag] = None
def is_cutting(self) -> bool:
return self._cutting
def can_cut_stream(self) -> bool:
if self._triggered or self._cutting:
return False
return self._last_timestamp >= self._min_duration
def cut_stream(self) -> bool:
if self.can_cut_stream():
self._triggered = True
return True
return False
def __call__(self, source: FLVStream) -> FLVStream:
return self._cut(source).pipe(correct())
def _cut(self, source: FLVStream) -> FLVStream:
def subscribe(
observer: abc.ObserverBase[FLVStreamItem],
scheduler: Optional[abc.SchedulerBase] = None,
) -> abc.DisposableBase:
def on_next(item: FLVStreamItem) -> None:
if isinstance(item, FlvHeader):
self._reset()
self._update_flv_header(item)
else:
self._update_meta_tags(item)
self._check_cut_point(item)
if self._cutting:
self._insert_header_and_tags(observer)
self._cutting = False
self._triggered = False
observer.on_next(item)
return source.subscribe(
on_next, observer.on_error, observer.on_completed, scheduler=scheduler
)
return Observable(subscribe)
def _update_flv_header(self, header: FlvHeader) -> None:
self._last_flv_header = header
def _update_meta_tags(self, tag: FlvTag) -> None:
if is_metadata_tag(tag):
self._last_metadata_tag = tag
elif is_audio_sequence_header(tag):
self._last_audio_sequence_header = tag
elif is_video_sequence_header(tag):
self._last_video_sequence_header = tag
def _insert_header_and_tags(
self, observer: abc.ObserverBase[FLVStreamItem]
) -> None:
assert self._last_flv_header is not None
assert self._last_audio_sequence_header is not None
assert self._last_video_sequence_header is not None
observer.on_next(self._last_flv_header)
if self._last_metadata_tag is not None:
observer.on_next(self._last_metadata_tag)
observer.on_next(self._last_audio_sequence_header)
observer.on_next(self._last_video_sequence_header)
def _check_cut_point(self, tag: FlvTag) -> None:
self._last_timestamp = tag.timestamp
if not self._triggered:
return
if not is_video_nalu_keyframe(tag):
return
self._cutting = True
logger.info(f'Cut stream at {format_timestamp(tag.timestamp)}')

56
src/blrec/flv/operators/defragment.py Normal file
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import logging
from typing import Callable, List, Optional
from reactivex import Observable, abc
from ..models import FlvHeader
from .typing import FLVStream, FLVStreamItem
__all__ = ('defragment',)
logger = logging.getLogger(__name__)
def defragment(min_tags: int = 10) -> Callable[[FLVStream], FLVStream]:
def _defragment(source: FLVStream) -> FLVStream:
"""Discard fragmented FLV streams."""
def subscribe(
observer: abc.ObserverBase[FLVStreamItem],
scheduler: Optional[abc.SchedulerBase] = None,
) -> abc.DisposableBase:
gathering: bool = False
gathered_items: List[FLVStreamItem] = []
def on_next(item: FLVStreamItem) -> None:
nonlocal gathering
if isinstance(item, FlvHeader):
if gathered_items:
logger.debug(
'Discarded {} items, total size: {}'.format(
len(gathered_items), sum(len(t) for t in gathered_items)
)
)
gathered_items.clear()
gathering = True
logger.debug('Gathering items...')
if gathering:
gathered_items.append(item)
if len(gathered_items) > min_tags:
for item in gathered_items:
observer.on_next(item)
gathered_items.clear()
gathering = False
logger.debug('Not a fragmented stream, stopped the gathering')
else:
observer.on_next(item)
return source.subscribe(
on_next, observer.on_error, observer.on_completed, scheduler=scheduler
)
return Observable(subscribe)
return _defragment

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src/blrec/flv/operators/dump.py Normal file
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import io
import logging
from typing import Callable, Optional, Tuple
from reactivex import Observable, Subject, abc
from reactivex.disposable import CompositeDisposable, Disposable, SerialDisposable
from ..io import FlvWriter
from ..models import FlvHeader
from .typing import FLVStream, FLVStreamItem
__all__ = ('Dumper',)
logger = logging.getLogger(__name__)
class Dumper:
def __init__(
self,
path_provider: Callable[..., Tuple[str, int]],
buffer_size: Optional[int] = None,
) -> None:
self.buffer_size = buffer_size or io.DEFAULT_BUFFER_SIZE # bytes
self._path_provider = path_provider
self._file_opened: Subject[Tuple[str, int]] = Subject()
self._file_closed: Subject[str] = Subject()
self._size_updates: Subject[int] = Subject()
self._timestamp_updates: Subject[int] = Subject()
self._reset()
def _reset(self) -> None:
self._path: str = ''
self._file: Optional[io.BufferedReader] = None
self._flv_writer: Optional[FlvWriter] = None
@property
def path(self) -> str:
return self._path
@property
def file_opened(self) -> Observable[Tuple[str, int]]:
return self._file_opened
@property
def file_closed(self) -> Observable[str]:
return self._file_closed
@property
def size_updates(self) -> Observable[int]:
return self._size_updates
@property
def timestamp_updates(self) -> Observable[int]:
return self._timestamp_updates
def __call__(self, source: FLVStream) -> FLVStream:
return self._dump(source)
def _open_file(self) -> None:
self._path, timestamp = self._path_provider()
self._file = open(self._path, 'wb', buffering=self.buffer_size) # type: ignore
logger.debug(f'Opened file: {self._path}')
self._file_opened.on_next((self._path, timestamp))
def _close_file(self) -> None:
if self._file is not None and not self._file.closed:
self._file.close()
logger.debug(f'Closed file: {self._path}')
self._file_closed.on_next(self._path)
def _dump(self, source: FLVStream) -> FLVStream:
def subscribe(
observer: abc.ObserverBase[FLVStreamItem],
scheduler: Optional[abc.SchedulerBase] = None,
) -> abc.DisposableBase:
subscription = SerialDisposable()
self._close_file()
self._reset()
def on_next(item: FLVStreamItem) -> None:
try:
if isinstance(item, FlvHeader):
self._close_file()
self._open_file()
assert self._file is not None
self._flv_writer = FlvWriter(self._file)
size = self._flv_writer.write_header(item)
self._size_updates.on_next(size)
self._timestamp_updates.on_next(0)
else:
if self._flv_writer is not None:
size = self._flv_writer.write_tag(item)
self._size_updates.on_next(size)
self._timestamp_updates.on_next(item.timestamp)
observer.on_next(item)
except Exception as e:
self._close_file()
self._reset()
observer.on_error(e)
def on_completed() -> None:
self._close_file()
self._reset()
observer.on_completed()
def on_error(e: Exception) -> None:
self._close_file()
self._reset()
observer.on_error(e)
def dispose() -> None:
self._close_file()
self._reset()
subscription.disposable = source.subscribe(
on_next, on_error, on_completed, scheduler=scheduler
)
return CompositeDisposable(subscription, Disposable(dispose))
return Observable(subscribe)

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src/blrec/flv/operators/fix.py Normal file
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import logging
import math
from typing import Callable, Optional
from reactivex import Observable, abc
from ..common import (
is_audio_tag,
is_metadata_tag,
is_script_tag,
is_video_tag,
parse_metadata,
)
from ..models import AudioTag, FlvHeader, FlvTag, ScriptTag, VideoTag
from .typing import FLVStream, FLVStreamItem
__all__ = ('fix',)
logger = logging.getLogger(__name__)
def fix() -> Callable[[FLVStream], FLVStream]:
def _fix(source: FLVStream) -> FLVStream:
"""Fix broken timestamps of the FLV tags."""
def subscribe(
observer: abc.ObserverBase[FLVStreamItem],
scheduler: Optional[abc.SchedulerBase] = None,
) -> abc.DisposableBase:
delta: int = 0
last_tag: Optional[FlvTag] = None
last_audio_tag: Optional[AudioTag] = None
last_video_tag: Optional[VideoTag] = None
frame_rate = 30.0
video_frame_interval = math.ceil(1000 / frame_rate)
sound_sample_interval = math.ceil(1000 / 44)
def reset() -> None:
nonlocal delta, last_tag, last_audio_tag, last_video_tag
nonlocal frame_rate, video_frame_interval, sound_sample_interval
delta = 0
last_tag = None
last_audio_tag = None
last_video_tag = None
frame_rate = 30.0
video_frame_interval = math.ceil(1000 / frame_rate)
sound_sample_interval = math.ceil(1000 / 44)
def update_parameters(tag: ScriptTag) -> None:
nonlocal frame_rate, video_frame_interval
metadata = parse_metadata(tag)
fps = metadata.get('fps') or metadata.get('framerate')
if not fps:
return
frame_rate = fps
video_frame_interval = math.ceil(1000 / frame_rate)
logger.debug(
'frame rate: {}, video frame interval: {}'.format(
frame_rate, video_frame_interval
)
)
def update_last_tags(tag: FlvTag) -> None:
nonlocal last_tag, last_audio_tag, last_video_tag
last_tag = tag
if is_audio_tag(tag):
last_audio_tag = tag
elif is_video_tag(tag):
last_video_tag = tag
def update_delta(tag: FlvTag) -> None:
nonlocal delta
assert last_tag is not None
delta = last_tag.timestamp + delta - tag.timestamp + calc_interval(tag)
def correct_ts(tag: FlvTag) -> FlvTag:
if delta == 0:
return tag
return tag.evolve(timestamp=tag.timestamp + delta)
def calc_interval(tag: FlvTag) -> int:
if is_audio_tag(tag):
return sound_sample_interval
elif is_video_tag(tag):
return video_frame_interval
else:
logger.warning(f'Unexpected tag type: {tag}')
return min(sound_sample_interval, video_frame_interval)
def is_ts_rebounded(tag: FlvTag) -> bool:
if is_audio_tag(tag):
if last_audio_tag is None:
return False
return tag.timestamp < last_audio_tag.timestamp
elif is_video_tag(tag):
if last_video_tag is None:
return False
return tag.timestamp < last_video_tag.timestamp
else:
return False
def is_ts_incontinuous(tag: FlvTag) -> bool:
if last_tag is None:
return False
return tag.timestamp - last_tag.timestamp > max(
sound_sample_interval, video_frame_interval
)
def on_next(item: FLVStreamItem) -> None:
if isinstance(item, FlvHeader):
reset()
observer.on_next(item)
return
tag = item
if is_script_tag(tag):
if is_metadata_tag(tag):
update_parameters(tag)
observer.on_next(tag)
return
if is_ts_rebounded(tag):
update_delta(tag)
logger.warning(
f'Timestamp rebounded, updated delta: {delta}\n'
f'last audio tag: {last_audio_tag}\n'
f'last video tag: {last_video_tag}\n'
f'current tag: {tag}'
)
elif is_ts_incontinuous(tag):
update_delta(tag)
logger.warning(
f'Timestamp incontinuous, updated delta: {delta}\n'
f'last tag: {last_tag}\n'
f'current tag: {tag}'
)
update_last_tags(tag)
tag = correct_ts(tag)
observer.on_next(tag)
return source.subscribe(
on_next, observer.on_error, observer.on_completed, scheduler=scheduler
)
return Observable(subscribe)
return _fix

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import io
import logging
from reactivex import of
from .parse import parse
from .typing import FLVStream
__all__ = ('from_file', 'from_stream')
logger = logging.getLogger(__name__)
def from_stream(
stream: io.RawIOBase,
*,
complete_on_eof: bool = False,
backup_timestamp: bool = False,
restore_timestamp: bool = False,
) -> FLVStream:
return of(stream).pipe(
parse(
complete_on_eof=complete_on_eof,
backup_timestamp=backup_timestamp,
restore_timestamp=restore_timestamp,
)
)
def from_file(
path: str, *, backup_timestamp: bool = False, restore_timestamp: bool = False
) -> FLVStream:
return from_stream(
open(path, 'rb'),
complete_on_eof=True,
backup_timestamp=backup_timestamp,
restore_timestamp=restore_timestamp,
)

93
src/blrec/flv/operators/inject.py Normal file
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from __future__ import annotations
import logging
from typing import Any, Callable, Dict, Optional, cast
from reactivex import Observable, abc
from ..common import (
create_metadata_tag,
enrich_metadata,
is_metadata_tag,
parse_metadata,
update_metadata,
)
from ..models import FlvHeader, ScriptTag
from .analyse import KeyFramesDict
from .typing import FLVStream, FLVStreamItem
__all__ = ('Injector',)
logger = logging.getLogger(__name__)
class Injector:
def __init__(self, metadata_provider: Callable[..., Dict[str, Any]]) -> None:
self._metadata_provider = metadata_provider
def __call__(self, source: FLVStream) -> FLVStream:
return self._inject(source)
def _inject(self, source: FLVStream) -> FLVStream:
def subscribe(
observer: abc.ObserverBase[FLVStreamItem],
scheduler: Optional[abc.SchedulerBase] = None,
) -> abc.DisposableBase:
index = 0
def on_next(item: FLVStreamItem) -> None:
nonlocal index
if isinstance(item, FlvHeader):
index = 0
observer.on_next(item)
return
tag = item
index += 1
if index == 1:
if is_metadata_tag(tag):
tag = self._inject_metadata(tag)
logger.debug('Injected metadata into the metadata tag')
else:
logger.debug('No metadata tag in the stream')
tag = self._make_metadata_tag()
logger.debug('Maked a metadata tag for metadata injection')
observer.on_next(tag)
logger.debug('Inserted the artificial metadata tag')
observer.on_next(tag)
return source.subscribe(
on_next, observer.on_error, observer.on_completed, scheduler=scheduler
)
return Observable(subscribe)
def _inject_metadata(self, tag: ScriptTag) -> ScriptTag:
old_metadata = parse_metadata(tag)
new_metadata = self._metadata_provider()
final_metadata = {
**{'duration': 0.0, 'filesize': 0.0},
**old_metadata,
**new_metadata,
}
new_tag = enrich_metadata(tag, final_metadata, offset=tag.offset)
if 'keyframes' in final_metadata:
keyframes = cast(KeyFramesDict, final_metadata['keyframes'])
offset = new_tag.tag_size - tag.tag_size
keyframes['filepositions'] = list(
map(lambda p: p + offset, keyframes['filepositions'])
)
if 'lastkeyframelocation' in final_metadata:
final_metadata['lastkeyframelocation'] = keyframes['filepositions'][-1]
new_tag = update_metadata(new_tag, final_metadata)
return new_tag
def _make_metadata_tag(self) -> ScriptTag:
metadata = self._metadata_provider()
metadata = {'duration': 0.0, 'filesize': 0.0, **metadata}
return create_metadata_tag(metadata)

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from __future__ import annotations
import logging
from typing import Optional
from reactivex import Observable, abc
from ..common import (
is_audio_sequence_header,
is_metadata_tag,
is_video_nalu_keyframe,
is_video_sequence_header,
)
from ..models import BACK_POINTER_SIZE, AudioTag, FlvHeader, FlvTag, ScriptTag, VideoTag
from .correct import correct
from .typing import FLVStream, FLVStreamItem
__all__ = ('Limiter',)
logger = logging.getLogger(__name__)
class Limiter:
def __init__(
self,
filesize_limit: int = 0, # file size in bytes, no limit by default.
duration_limit: int = 0, # duration in seconds, no limit by default.
) -> None:
self.filesize_limit = filesize_limit
self.duration_limit = duration_limit
self._reset()
def _reset(self) -> None:
self._filesize: int = 0
self._duration: float = 0.0
self._max_size_between_keyframes: int = 0
self._max_duration_between_keyframes: float = 0.0
self._first_keyframe_tag: Optional[VideoTag] = None
self._last_keyframe_tag: Optional[VideoTag] = None
self._last_flv_header: Optional[FlvHeader] = None
self._last_metadata_tag: Optional[ScriptTag] = None
self._last_audio_sequence_header: Optional[AudioTag] = None
self._last_video_sequence_header: Optional[VideoTag] = None
def __call__(self, source: FLVStream) -> FLVStream:
return self._limit(source).pipe(correct())
def _limit(self, source: FLVStream) -> FLVStream:
def subscribe(
observer: abc.ObserverBase[FLVStreamItem],
scheduler: Optional[abc.SchedulerBase] = None,
) -> abc.DisposableBase:
def on_next(item: FLVStreamItem) -> None:
if isinstance(item, FlvHeader):
self._reset()
self._update_flv_header(item)
else:
self._update_meta_tags(item)
will_over_limts = self._check_limits(item)
if will_over_limts:
self._insert_header_and_tags(observer)
observer.on_next(item)
return source.subscribe(
on_next, observer.on_error, observer.on_completed, scheduler=scheduler
)
return Observable(subscribe)
def _insert_header_and_tags(
self, observer: abc.ObserverBase[FLVStreamItem]
) -> None:
assert self._last_flv_header is not None
assert self._last_audio_sequence_header is not None
assert self._last_video_sequence_header is not None
observer.on_next(self._last_flv_header)
if self._last_metadata_tag is not None:
observer.on_next(self._last_metadata_tag)
observer.on_next(self._last_audio_sequence_header)
observer.on_next(self._last_video_sequence_header)
self._filesize = (
self._last_flv_header.size
+ self._last_audio_sequence_header.tag_size
+ self._last_video_sequence_header.tag_size
)
if self._last_metadata_tag is not None:
self._filesize += self._last_metadata_tag.tag_size
self._duration = 0.0
self._first_keyframe_tag = self._last_keyframe_tag
def _will_filesize_over_limit(self) -> bool:
return self._filesize + self._max_size_between_keyframes >= self.filesize_limit
def _will_duration_over_limit(self) -> bool:
return (
self._duration + self._max_duration_between_keyframes >= self.duration_limit
)
def _update_flv_header(self, header: FlvHeader) -> None:
self._filesize += header.size + BACK_POINTER_SIZE
self._last_flv_header = header
def _update_meta_tags(self, tag: FlvTag) -> None:
if is_metadata_tag(tag):
self._last_metadata_tag = tag
elif is_audio_sequence_header(tag):
self._last_audio_sequence_header = tag
elif is_video_sequence_header(tag):
self._last_video_sequence_header = tag
def _check_limits(self, tag: FlvTag) -> bool:
self._filesize += tag.tag_size + BACK_POINTER_SIZE
if not is_video_nalu_keyframe(tag):
return False
if self._first_keyframe_tag is None:
self._first_keyframe_tag = tag
if self._last_keyframe_tag is not None:
self._max_size_between_keyframes = max(
self._max_size_between_keyframes,
tag.offset - self._last_keyframe_tag.offset,
)
self._max_duration_between_keyframes = max(
self._max_duration_between_keyframes,
(tag.timestamp - self._last_keyframe_tag.timestamp) / 1000,
)
self._last_keyframe_tag = tag
self._duration = (
self._last_keyframe_tag.timestamp - self._first_keyframe_tag.timestamp
) / 1000
if self.filesize_limit > 0 and self._will_filesize_over_limit():
logger.debug(
'File size will be over the limit: {} + {}'.format(
self._filesize, self._max_size_between_keyframes
)
)
return True
if self.duration_limit > 0 and self._will_duration_over_limit():
logger.debug(
'Duration will be over the limit: {} + {}'.format(
self._duration, self._max_duration_between_keyframes
)
)
return True
return False

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import io
import logging
from typing import Callable, Optional
from reactivex import Observable, abc
from reactivex.disposable import CompositeDisposable, Disposable, SerialDisposable
from ..io import FlvReader
from .typing import FLVStream, FLVStreamItem
__all__ = ('parse',)
logger = logging.getLogger(__name__)
def parse(
*,
ignore_eof: bool = False,
complete_on_eof: bool = False,
backup_timestamp: bool = False,
restore_timestamp: bool = False,
) -> Callable[[Observable[io.RawIOBase]], FLVStream]:
def _parse(source: Observable[io.RawIOBase]) -> FLVStream:
def subscribe(
observer: abc.ObserverBase[FLVStreamItem],
scheduler: Optional[abc.SchedulerBase] = None,
) -> abc.DisposableBase:
disposed = False
subscription = SerialDisposable()
def on_next(stream: io.RawIOBase) -> None:
try:
try:
reader = FlvReader(
stream,
backup_timestamp=backup_timestamp,
restore_timestamp=restore_timestamp,
)
observer.on_next(reader.read_header())
while not disposed:
tag = reader.read_tag()
observer.on_next(tag)
finally:
stream.close()
except EOFError as e:
if complete_on_eof:
observer.on_completed()
else:
if not ignore_eof:
observer.on_error(e)
except Exception as e:
observer.on_error(e)
else:
observer.on_completed()
subscription.disposable = source.subscribe(
on_next, observer.on_error, observer.on_completed, scheduler=scheduler
)
def dispose() -> None:
nonlocal disposed
disposed = True
return CompositeDisposable(subscription, Disposable(dispose))
return Observable(subscribe)
return _parse

79
src/blrec/flv/operators/probe.py Normal file
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from __future__ import annotations
import io
import logging
from typing import List, Optional, cast
from reactivex import Observable, Subject, abc
from ...utils.ffprobe import StreamProfile, ffprobe
from ..io import FlvWriter
from ..models import FlvHeader, FlvTag
from .typing import FLVStream, FLVStreamItem
__all__ = ('Prober', 'StreamProfile')
logger = logging.getLogger(__name__)
class Prober:
def __init__(self) -> None:
self._profiles: Subject[StreamProfile] = Subject()
def _reset(self) -> None:
self._gathering: bool = False
self._gathered_items: List[FLVStreamItem] = []
@property
def profiles(self) -> Observable[StreamProfile]:
return self._profiles
def __call__(self, source: FLVStream) -> FLVStream:
return self._probe(source)
def _probe(self, source: FLVStream) -> FLVStream:
def subscribe(
observer: abc.ObserverBase[FLVStreamItem],
scheduler: Optional[abc.SchedulerBase] = None,
) -> abc.DisposableBase:
self._reset()
def on_next(item: FLVStreamItem) -> None:
if isinstance(item, FlvHeader):
self._gathered_items.clear()
self._gathering = True
if self._gathering:
self._gathered_items.append(item)
if len(self._gathered_items) >= 10:
try:
self._do_probe()
except Exception as e:
logger.warning(f'Failed to probe stream: {repr(e)}')
finally:
self._gathered_items.clear()
self._gathering = False
observer.on_next(item)
return source.subscribe(
on_next, observer.on_error, observer.on_completed, scheduler=scheduler
)
return Observable(subscribe)
def _do_probe(self) -> None:
bytes_io = io.BytesIO()
writer = FlvWriter(bytes_io)
writer.write_header(cast(FlvHeader, self._gathered_items[0]))
for tag in self._gathered_items[1:]:
writer.write_tag(cast(FlvTag, tag))
def on_next(profile: StreamProfile) -> None:
self._profiles.on_next(profile)
def on_error(e: Exception) -> None:
logger.warning(f'Failed to probe stream by ffprobe: {repr(e)}')
ffprobe(bytes_io.getvalue()).subscribe(on_next, on_error)

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src/blrec/flv/operators/process.py Normal file
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import logging
from typing import Callable
from .concat import concat
from .defragment import defragment
from .fix import fix
from .split import split
from .typing import FLVStream
__all__ = ('process',)
logger = logging.getLogger(__name__)
def process() -> Callable[[FLVStream], FLVStream]:
def _process(source: FLVStream) -> FLVStream:
return source.pipe(defragment(), split(), fix(), concat())
return _process

75
src/blrec/flv/operators/progress.py Normal file
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from __future__ import annotations
import logging
from typing import Optional
from reactivex import Observable, abc
from reactivex.disposable import CompositeDisposable, Disposable, SerialDisposable
from tqdm import tqdm
from .typing import FLVStream, FLVStreamItem
__all__ = ('ProgressBar',)
logger = logging.getLogger(__name__)
class ProgressBar:
def __init__(
self,
desc: str,
postfix: Optional[str] = None,
total: Optional[int] = None,
disable: Optional[bool] = False,
) -> None:
self._desc = desc
self._postfix = postfix
self._total = total
self._disable = disable
self._pbar: Optional[tqdm] = None
def __call__(self, source: FLVStream) -> FLVStream:
return self._progress(source)
def _progress(self, source: FLVStream) -> FLVStream:
def subscribe(
observer: abc.ObserverBase[FLVStreamItem],
scheduler: Optional[abc.SchedulerBase] = None,
) -> abc.DisposableBase:
subscription = SerialDisposable()
self._pbar = tqdm(
disable=self._disable,
desc=self._desc,
total=self._total,
unit='B',
unit_scale=True,
unit_divisor=1024,
postfix=self._postfix,
)
self._pbar.disable
def on_next(item: FLVStreamItem) -> None:
if self._pbar is not None:
self._pbar.update(len(item))
observer.on_next(item)
def on_completed() -> None:
if self._pbar is not None:
self._pbar.close()
self._pbar = None
observer.on_completed()
def dispose() -> None:
if self._pbar is not None:
self._pbar.close()
self._pbar = None
subscription.disposable = source.subscribe(
on_next, observer.on_error, on_completed, scheduler=scheduler
)
return CompositeDisposable(subscription, Disposable(dispose))
return Observable(subscribe)

100
src/blrec/flv/operators/split.py Normal file
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import logging
from typing import Callable, Optional
from reactivex import Observable, abc
from ..common import is_audio_sequence_header, is_metadata_tag, is_video_sequence_header
from ..models import AudioTag, FlvHeader, ScriptTag, VideoTag
from .correct import correct
from .typing import FLVStream, FLVStreamItem
__all__ = ('split',)
logger = logging.getLogger(__name__)
def split() -> Callable[[FLVStream], FLVStream]:
def _split(source: FLVStream) -> FLVStream:
"""Split the FLV stream when av parameters are changed."""
def subscribe(
observer: abc.ObserverBase[FLVStreamItem],
scheduler: Optional[abc.SchedulerBase] = None,
) -> abc.DisposableBase:
changed: bool = False
last_flv_header: Optional[FlvHeader] = None
last_metadata_tag: Optional[ScriptTag] = None
last_audio_sequence_header: Optional[AudioTag] = None
last_video_sequence_header: Optional[VideoTag] = None
def reset() -> None:
nonlocal changed
nonlocal last_flv_header
nonlocal last_metadata_tag
nonlocal last_audio_sequence_header, last_video_sequence_header
changed = False
last_flv_header = None
last_metadata_tag = None
last_audio_sequence_header = last_video_sequence_header = None
def insert_header_and_tags() -> None:
assert last_flv_header is not None
assert last_audio_sequence_header is not None
assert last_video_sequence_header is not None
observer.on_next(last_flv_header)
if last_metadata_tag is not None:
observer.on_next(last_metadata_tag)
observer.on_next(last_audio_sequence_header)
observer.on_next(last_video_sequence_header)
def on_next(item: FLVStreamItem) -> None:
nonlocal changed
nonlocal last_flv_header
nonlocal last_metadata_tag
nonlocal last_audio_sequence_header, last_video_sequence_header
if isinstance(item, FlvHeader):
reset()
last_flv_header = item
observer.on_next(item)
return
tag = item
if is_metadata_tag(tag):
logger.debug(f'Metadata tag: {tag}')
last_metadata_tag = tag
elif is_audio_sequence_header(tag):
logger.debug(f'Audio sequence header: {tag}')
if last_audio_sequence_header is not None:
if not tag.is_the_same_as(last_audio_sequence_header):
logger.warning('Audio parameters changed')
changed = True
last_audio_sequence_header = tag
return
last_audio_sequence_header = tag
elif is_video_sequence_header(tag):
logger.debug(f'Video sequence header: {tag}')
if last_video_sequence_header is not None:
if not tag.is_the_same_as(last_video_sequence_header):
logger.warning('Video parameters changed')
changed = True
last_video_sequence_header = tag
return
last_video_sequence_header = tag
else:
if changed:
logger.debug('Splitting stream...')
changed = False
insert_header_and_tags()
logger.debug('Splitted stream')
observer.on_next(tag)
return source.subscribe(
on_next, observer.on_error, observer.on_completed, scheduler=scheduler
)
return Observable(subscribe).pipe(correct())
return _split

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src/blrec/flv/operators/typing.py Normal file
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from typing import Union
from reactivex import Observable
from ..models import FlvHeader, FlvTag
FLVStreamItem = Union[FlvHeader, FlvTag]
FLVStream = Observable[FLVStreamItem]

58
src/blrec/flv/parameters_checker.py
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@ -1,58 +0,0 @@
from __future__ import annotations
import logging
from typing import Optional
from .models import AudioTag, FlvTag, ScriptTag, VideoTag
from .common import (
is_audio_sequence_header, is_video_sequence_header, is_metadata_tag
)
from .exceptions import AudioParametersChanged, VideoParametersChanged
__all__ = 'ParametersChecker',
logger = logging.getLogger(__name__)
class ParametersChecker:
def __init__(self) -> None:
self.reset()
@property
def last_metadata_tag(self) -> Optional[ScriptTag]:
return self._last_metadata_tag
@property
def last_audio_header_tag(self) -> Optional[AudioTag]:
return self._last_audio_header_tag
@property
def last_video_header_tag(self) -> Optional[VideoTag]:
return self._last_video_header_tag
def reset(self) -> None:
self._last_metadata_tag: Optional[ScriptTag] = None
self._last_audio_header_tag: Optional[AudioTag] = None
self._last_video_header_tag: Optional[VideoTag] = None
def check_tag(self, tag: FlvTag) -> None:
if is_audio_sequence_header(tag):
if self._last_audio_header_tag is not None:
if not tag.is_the_same_as(self._last_audio_header_tag):
logger.debug(f'Audio parameters changed: {tag}')
self._last_audio_header_tag = tag
raise AudioParametersChanged()
self._last_audio_header_tag = tag
elif is_video_sequence_header(tag):
if self._last_video_header_tag is not None:
if not tag.is_the_same_as(self._last_video_header_tag):
logger.debug(f'Video parameters changed: {tag}')
self._last_video_header_tag = tag
raise VideoParametersChanged()
self._last_video_header_tag = tag
elif is_metadata_tag(tag):
self._last_metadata_tag = tag
else:
pass

60
src/blrec/flv/stream_cutter.py
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@ -1,60 +0,0 @@
from __future__ import annotations
import logging
from typing import Optional
from .models import FlvTag, VideoTag
from .exceptions import CutStream
from .common import is_video_nalu_keyframe
from .utils import format_timestamp
__all__ = 'StreamCutter',
logger = logging.getLogger(__name__)
class StreamCutter:
def __init__(self, min_duration: int = 5_000) -> None:
self._min_duration = min_duration # milliseconds
self._last_position: int = 0
self.reset()
@property
def last_keyframe_tag(self) -> Optional[VideoTag]:
return self._last_keyframe_tag
def is_cutting(self) -> bool:
return self._cutting
def can_cut_stream(self) -> bool:
return self._timestamp >= self._min_duration
def cut_stream(self) -> bool:
if self.can_cut_stream():
self._triggered = True
return True
return False
def reset(self) -> None:
self._cutting = False
self._triggered = False
self._timestamp: int = 0
self._last_keyframe_tag: Optional[VideoTag] = None
def check_tag(self, tag: FlvTag) -> None:
self._timestamp = tag.timestamp
if not self._triggered:
return
if not is_video_nalu_keyframe(tag):
return
self._last_keyframe_tag = tag
self._last_position += self._timestamp
self._cutting = True
logger.info(f'Cut stream at: {format_timestamp(self._last_position)}')
raise CutStream()

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src/blrec/flv/stream_processor.py
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from __future__ import annotations
import io
import math
from abc import ABC, abstractmethod
import json
import logging
from typing import (
Any, BinaryIO, Dict, List, Final, Iterable, Iterator, Optional, Tuple,
Protocol, TypedDict, Union, cast, TYPE_CHECKING
)
import attr
from rx.subject import Subject
from rx.core import Observable
from .models import FlvHeader, FlvTag, ScriptTag, VideoTag, AudioTag
from .data_analyser import DataAnalyser, MetaData
from .stream_cutter import StreamCutter
from .limit_checker import LimitChecker
from .parameters_checker import ParametersChecker
from .io import FlvReader, FlvWriter
from .io_protocols import RandomIO
from .utils import format_offest, format_timestamp
from .exceptions import (
FlvTagError,
FlvStreamCorruptedError,
AudioParametersChanged,
VideoParametersChanged,
FileSizeOverLimit,
DurationOverLimit,
CutStream,
)
from .common import (
is_metadata_tag, parse_metadata, is_audio_tag, is_video_tag,
is_video_sequence_header, is_audio_sequence_header,
enrich_metadata, update_metadata, is_data_tag, read_tags_in_duration,
)
from ..path import extra_metadata_path
if TYPE_CHECKING:
from ..core.stream_analyzer import StreamProfile
__all__ = 'StreamProcessor', 'BaseOutputFileManager', 'JoinPoint'
logger = logging.getLogger(__name__)
class StreamProcessor:
# Number of tags for determining whether or not tags are duplicated
_TAG_SEQUENCE_COUNT: Final[int] = 3
# Max duration in milliseconds the duplicated tags might last
_MAX_DURATION: Final[int] = 20000
def __init__(
self,
file_manager: OutputFileManager,
*,
metadata: Optional[Dict[str, Any]] = None,
filesize_limit: int = 0,
duration_limit: int = 0,
disable_limit: bool = False,
analyse_data: bool = False,
dedup_join: bool = False,
save_extra_metadata: bool = False,
backup_timestamp: bool = False,
restore_timestamp: bool = False,
) -> None:
self._file_manager = file_manager
self._parameters_checker = ParametersChecker()
self._stream_cutter = StreamCutter()
if not disable_limit:
self._limit_checker = LimitChecker(filesize_limit, duration_limit)
if analyse_data:
self._data_analyser = DataAnalyser()
self._metadata = metadata.copy() if metadata else {}
self._metadata_tag: ScriptTag
self._disable_limit = disable_limit
self._analyse_data = analyse_data
self._dedup_join = dedup_join
self._save_x_metadata = save_extra_metadata
self._backup_timestamp = backup_timestamp
self._restore_timestamp = restore_timestamp
self._cancelled: bool = False
self._finalized: bool = False
self._stream_count: int = 0
self._size_updates = Subject()
self._time_updates = Subject()
self._stream_profile_updates = Subject()
self._delta: int = 0
self._has_audio: bool = False
self._last_tags: List[FlvTag] = []
self._join_points: List[JoinPoint] = []
self._resetting_file: bool = False
@property
def filesize_limit(self) -> int:
if self._disable_limit:
return 0
return self._limit_checker.filesize_limit
@filesize_limit.setter
def filesize_limit(self, value: int) -> None:
if not self._disable_limit:
self._limit_checker.filesize_limit = value
@property
def duration_limit(self) -> int:
if self._disable_limit:
return 0
return self._limit_checker.duration_limit
@duration_limit.setter
def duration_limit(self, value: int) -> None:
if not self._disable_limit:
self._limit_checker.duration_limit = value
@property
def join_points(self) -> Iterator[JoinPoint]:
for point in self._join_points:
yield point
@property
def metadata(self) -> Optional[MetaData]:
if not self._analyse_data:
return None
try:
return self._data_analyser.make_metadata()
except AssertionError:
return None
except Exception as e:
logger.debug(f'Failed to make metadata data, due to: {repr(e)}')
return None
@property
def size_updates(self) -> Observable:
return self._size_updates
@property
def time_updates(self) -> Observable:
return self._time_updates
@property
def stream_profile_updates(self) -> Observable:
return self._stream_profile_updates
@property
def cancelled(self) -> bool:
return self._cancelled
@property
def finalized(self) -> bool:
return self._finalized
def cancel(self) -> None:
self._cancelled = True
def set_metadata(self, metadata: Dict[str, Any]) -> None:
self._metadata = metadata.copy()
def process_stream(self, stream: RandomIO) -> None:
assert not self._cancelled and not self._finalized, \
'should not be called after the processing cancelled or finalized'
self._stream_count += 1
self._process_stream(stream)
def can_cut_stream(self) -> bool:
return self._stream_cutter.can_cut_stream()
def cut_stream(self) -> bool:
return self._stream_cutter.cut_stream()
def finalize(self) -> None:
assert not self._finalized, \
'should not be called after the processing finalized'
self._finalized = True
if not self._need_to_finalize():
logger.debug('No need to finalize stream processing')
return
self._complete_file()
logger.debug('Finalized stream processing')
def _need_to_finalize(self) -> bool:
return self._stream_count > 0 and len(self._last_tags) > 0
def _reset_params(self) -> None:
self._delta = 0
self._has_audio = False
self._last_tags = []
self._join_points = []
self._resetting_file = False
self._stream_cutter.reset()
if not self._disable_limit:
self._limit_checker.reset()
if self._analyse_data:
self._data_analyser.reset()
def _new_file(self) -> None:
self._reset_params()
self._out_file = self._file_manager.create_file()
self._out_writer = FlvWriter(self._out_file)
logger.debug(f'New file: {self._file_manager.curr_path}')
def _reset_file(self) -> None:
self._reset_params()
self._out_file.truncate(0)
logger.debug(f'Reset file: {self._file_manager.curr_path}')
def _complete_file(self) -> None:
curr_path = self._file_manager.curr_path
if self._save_x_metadata:
self._save_extra_metadata()
self._update_metadata_tag()
self._file_manager.close_file()
logger.debug(f'Complete file: {curr_path}')
def _process_stream(self, stream: RandomIO) -> None:
logger.debug(f'Processing the {self._stream_count}th stream...')
self._in_reader = FlvReaderWithTimestampFix(
stream,
backup_timestamp=self._backup_timestamp,
restore_timestamp=self._restore_timestamp,
)
flv_header = self._read_header()
self._has_audio = flv_header.has_audio()
try:
first_data_tag = self._read_first_data_tag()
if not self._last_tags:
self._process_initial_stream(flv_header, first_data_tag)
else:
self._process_subsequent_stream(first_data_tag)
except (
AudioParametersChanged, VideoParametersChanged,
FileSizeOverLimit, DurationOverLimit, CutStream,
):
self._process_split_stream(flv_header)
logger.debug(f'Completed processing the {self._stream_count}th stream')
def _process_initial_stream(
self, flv_header: FlvHeader, first_data_tag: FlvTag
) -> None:
if self._resetting_file:
self._reset_file()
else:
self._new_file()
try:
self._write_header(self._ensure_header_correct(flv_header))
self._transfer_meta_tags()
self._transfer_first_data_tag(first_data_tag)
self._update_stream_profile(flv_header, first_data_tag)
except Exception:
self._last_tags = []
self._resetting_file = True
raise
else:
del flv_header, first_data_tag
self._transfer_tags_until_complete()
def _process_subsequent_stream(self, first_data_tag: FlvTag) -> None:
tags: List[FlvTag] = []
if self._dedup_join:
tags, exc = self._read_tags_for_deduplication()
if (index := self._find_last_duplicated_tag(tags)) >= 0:
seamless = True
self._delta = self._calc_delta_duplicated(tags[index])
tags = tags[index + 1:]
if not tags:
tags = [self._read_first_data_tag()]
if not self._dedup_join or index == -1:
seamless = False
self._delta = self._calc_delta_no_duplicated(first_data_tag)
tags.insert(0, first_data_tag)
offset = self._out_file.tell()
timestamp = tags[0].timestamp + self._delta
self._add_join_point(offset, timestamp, seamless)
self._transfer_tags(tags)
del first_data_tag, tags
if self._dedup_join and exc:
raise exc
self._transfer_tags_until_complete()
def _process_split_stream(self, flv_header: FlvHeader) -> None:
self._complete_file()
first_data_tag: FlvTag
if self._stream_cutter.is_cutting():
assert self._stream_cutter.last_keyframe_tag is not None
last_keyframe_tag = self._stream_cutter.last_keyframe_tag
original_ts = last_keyframe_tag.timestamp - self._delta
first_data_tag = last_keyframe_tag.evolve(timestamp=original_ts)
elif (
not self._disable_limit and (
self._limit_checker.is_filesize_over_limit() or
self._limit_checker.is_duration_over_limit()
)
):
assert self._limit_checker.last_keyframe_tag is not None
last_keyframe_tag = self._limit_checker.last_keyframe_tag
original_ts = last_keyframe_tag.timestamp - self._delta
first_data_tag = last_keyframe_tag.evolve(timestamp=original_ts)
else:
first_data_tag = self._read_first_data_tag()
try:
self._process_initial_stream(flv_header, first_data_tag)
except (
AudioParametersChanged, VideoParametersChanged,
FileSizeOverLimit, DurationOverLimit, CutStream,
):
self._process_split_stream(flv_header)
def _transfer_meta_tags(self) -> None:
logger.debug('Transfering meta tags...')
if self._parameters_checker.last_metadata_tag is None:
raise FlvStreamCorruptedError('No metadata tag in the stream')
if self._parameters_checker.last_video_header_tag is None:
raise FlvStreamCorruptedError('No video header tag in the stream')
if self._has_audio:
if self._parameters_checker.last_audio_header_tag is None:
raise FlvStreamCorruptedError(
'No audio header tag in the stream'
)
metadata_tag = self._parameters_checker.last_metadata_tag
video_header_tag = self._parameters_checker.last_video_header_tag
audio_header_tag = self._parameters_checker.last_audio_header_tag
offset = self._out_file.tell()
self._metadata_tag = self._enrich_metadata(metadata_tag, offset)
offset_delta = self._metadata_tag.tag_size - metadata_tag.tag_size
self._update_injected_metadata(offset_delta)
self._write_tag(
self._correct_ts(self._metadata_tag, -self._metadata_tag.timestamp)
)
self._write_tag(
self._correct_ts(video_header_tag, -video_header_tag.timestamp)
)
if audio_header_tag is not None:
self._write_tag(
self._correct_ts(audio_header_tag, -audio_header_tag.timestamp)
)
logger.debug('Meta tags have been transfered')
def _update_stream_profile(
self, flv_header: FlvHeader, first_data_tag: FlvTag
) -> None:
from ..core.stream_analyzer import ffprobe
if self._parameters_checker.last_metadata_tag is None:
return
if self._parameters_checker.last_video_header_tag is None:
return
bytes_io = io.BytesIO()
writer = FlvWriter(bytes_io)
writer.write_header(flv_header)
writer.write_tag(
self._correct_ts(
self._parameters_checker.last_metadata_tag,
-self._parameters_checker.last_metadata_tag.timestamp,
)
)
writer.write_tag(
self._correct_ts(
self._parameters_checker.last_video_header_tag,
-self._parameters_checker.last_video_header_tag.timestamp,
)
)
if self._parameters_checker.last_audio_header_tag is not None:
writer.write_tag(
self._correct_ts(
self._parameters_checker.last_audio_header_tag,
-self._parameters_checker.last_audio_header_tag.timestamp,
)
)
writer.write_tag(self._correct_ts(first_data_tag, -first_data_tag.timestamp))
def on_next(profile: StreamProfile) -> None:
self._stream_profile_updates.on_next(profile)
def on_error(e: Exception) -> None:
logger.warning(f'Failed to analyse stream: {repr(e)}')
ffprobe(bytes_io.getvalue()).subscribe(on_next, on_error)
def _transfer_first_data_tag(self, tag: FlvTag) -> None:
logger.debug(f'Transfer the first data tag: {tag}')
self._delta = -tag.timestamp
self._transfer_tags([tag])
logger.debug('The first data tag has been transfered')
def _read_tags_for_deduplication(
self
) -> Tuple[List[FlvTag], Optional[Exception]]:
logger.debug('Reading tags for tag deduplication...')
tags: List[FlvTag] = []
try:
for tag in read_tags_in_duration(
self._in_reader, self._MAX_DURATION
):
tags.append(tag)
except Exception as exc:
logger.debug(f'Failed to read data, due to: {repr(exc)}')
return tags, exc
else:
return tags, None
finally:
logger.debug('Read {} tags, total size: {}'.format(
len(tags), sum(t.tag_size for t in tags)
))
def _transfer_tags_until_complete(self) -> None:
logger.debug('Transfering tags until complete...')
self._transfer_tags(self._read_tags_from_in_stream())
def _read_tags_from_in_stream(self) -> Iterator[FlvTag]:
while not self._cancelled:
try:
tag = self._in_reader.read_tag()
self._parameters_checker.check_tag(tag)
yield tag
except EOFError:
logger.debug('The input stream exhausted')
break
except AudioParametersChanged:
if self._analyse_data:
logger.warning('Audio parameters changed at {}'.format(
format_timestamp(self._data_analyser.last_timestamp),
))
yield tag
except VideoParametersChanged:
if self._analyse_data:
logger.warning('Video parameters changed at {}'.format(
format_timestamp(self._data_analyser.last_timestamp),
))
raise
except Exception as e:
logger.debug(f'Failed to read data, due to: {repr(e)}')
raise
else:
logger.debug('Cancelled reading tags from the input stream')
def _transfer_tags(self, tags: Iterable[FlvTag]) -> None:
logger.debug(f'Transfering tags... timestamp delta: {self._delta}')
try:
count: int = 0
for tag in tags:
self._ensure_ts_correct(tag)
self._write_tag(self._correct_ts(tag, self._delta))
count += 1
finally:
logger.debug(f'{count} tags have been transfered')
def _add_join_point(
self, offset: int, timestamp: int, seamless: bool
) -> None:
join_point = JoinPoint(offset, timestamp, seamless)
self._join_points.append(join_point)
logger.debug(f'{repr(join_point)}; {join_point}')
def _find_last_duplicated_tag(self, tags: List[FlvTag]) -> int:
logger.debug('Finding duplicated tags...')
last_out_tag = self._last_tags[0]
logger.debug(f'The last output tag is {last_out_tag}')
for idx, tag in enumerate(tags):
if not tag.is_the_same_as(last_out_tag):
continue
if not all(
map(
lambda t: t[0].is_the_same_as(t[1]),
zip(reversed(tags[:idx]), self._last_tags[1:])
)
):
continue
logger.debug(f'The last duplicated tag found at {idx} is {tag}')
return idx
logger.debug('No duplicated tags found')
return -1
def _read_header(self) -> FlvHeader:
try:
return self._in_reader.read_header()
except Exception as exc:
raise FlvStreamCorruptedError(repr(exc))
def _read_first_data_tag(self) -> Union[AudioTag, VideoTag]:
for tag in self._read_tags_from_in_stream():
if is_data_tag(tag):
return tag
raise FlvStreamCorruptedError('No data tag found in the stream!')
def _read_tags(self, count: int) -> Iterator[FlvTag]:
assert count > 0, 'count must greater than 0'
for c, tag in enumerate(self._read_tags_from_in_stream(), start=1):
yield tag
if c >= count:
break
def _write_header(self, header: FlvHeader) -> None:
try:
size = self._out_writer.write_header(header)
logger.debug('The flv header has been copied')
except Exception as exc:
logger.debug(f'Failed to write data, due to: {repr(exc)}')
raise
if not self._disable_limit:
self._limit_checker.check_header(header)
if self._analyse_data:
self._data_analyser.analyse_header(header)
self._size_updates.on_next(size)
def _write_tag(self, tag: FlvTag) -> None:
offset = self._out_file.tell()
tag = tag.evolve(offset=offset)
try:
size = self._out_writer.write_tag(tag)
except Exception as exc:
logger.debug(f'Failed to write data, due to: {repr(exc)}')
raise
else:
self._last_tags.insert(0, tag)
if len(self._last_tags) > self._TAG_SEQUENCE_COUNT:
self._last_tags.pop()
self._stream_cutter.check_tag(tag)
if not self._disable_limit:
self._limit_checker.check_tag(tag)
if self._analyse_data:
self._data_analyser.analyse_tag(tag)
self._size_updates.on_next(size)
self._time_updates.on_next(tag.timestamp)
def _ensure_header_correct(self, header: FlvHeader) -> FlvHeader:
header.set_video_flag(
self._parameters_checker.last_video_header_tag is not None
)
header.set_audio_flag(
self._parameters_checker.last_audio_header_tag is not None
)
return header
def _ensure_ts_correct(self, tag: FlvTag) -> None:
if not tag.timestamp + self._delta < 0:
return
logger.warning(
f'Incorrect timestamp: {tag.timestamp + self._delta}\n'
f'last output tag: {self._last_tags[0]}\n'
f'current tag: {tag}'
)
if tag.is_audio_tag() or tag.is_video_tag():
self._delta = (
self._last_tags[0].timestamp +
self._in_reader.calc_interval(tag) - tag.timestamp
)
logger.debug(f'Updated delta: {self._delta}')
elif tag.is_script_tag():
self._delta = (
self._last_tags[0].timestamp - tag.timestamp
)
logger.debug(f'Updated delta: {self._delta}')
else:
pass
def _correct_ts(self, tag: FlvTag, delta: int) -> FlvTag:
if delta == 0 and tag.timestamp >= 0:
return tag
return tag.evolve(timestamp=tag.timestamp + delta)
def _calc_delta_duplicated(self, last_duplicated_tag: FlvTag) -> int:
return self._last_tags[0].timestamp - last_duplicated_tag.timestamp
def _calc_delta_no_duplicated(self, first_data_tag: FlvTag) -> int:
return (
self._last_tags[0].timestamp - first_data_tag.timestamp +
self._in_reader.calc_interval(first_data_tag)
)
def _enrich_metadata(
self, old_metadata_tag: ScriptTag, offset: int
) -> ScriptTag:
# ensure nesessary properties exists in the metadata and init them.
metadata = parse_metadata(old_metadata_tag)
self._metadata.update({
'duration': 0.0,
'filesize': 0.0,
'framerate': metadata.get('framerate', metadata.get('fps', 0.0)),
})
# merge the metadata into the metadata tag
return enrich_metadata(old_metadata_tag, self._metadata, offset)
def _update_injected_metadata(self, offset_delta: int) -> None:
updated = False
if (keyframes := self._metadata.get('keyframes')):
keyframes['filepositions'] = list(
map(lambda p: p + offset_delta, keyframes['filepositions'])
)
if 'lastkeyframelocation' in self._metadata:
self._metadata['lastkeyframelocation'] = \
keyframes['filepositions'][-1]
updated = True
if (join_points := self._metadata.get('joinpoints')):
join_points = cast(List[JoinPointData], join_points)
self._metadata['joinpoints'] = list(
{**p, 'offset': p['offset'] + offset_delta}
for p in join_points
)
updated = True
if updated:
self._metadata_tag = \
update_metadata(self._metadata_tag, self._metadata)
def _update_metadata_tag(self) -> None:
last_tag = self._last_tags[0]
duration = last_tag.timestamp / 1000
filesize = float(last_tag.next_tag_offset)
updates = {
'duration': duration,
'filesize': filesize,
}
if self._analyse_data:
updates.update({
'framerate': self._data_analyser.calc_frame_rate(),
})
self._metadata_tag = update_metadata(self._metadata_tag, updates)
self._out_file.seek(self._metadata_tag.offset)
self._out_writer.write_tag(self._metadata_tag)
logger.debug('The metadata tag has been updated')
def _save_extra_metadata(self) -> None:
if self._analyse_data:
metadata = attr.asdict(
self._data_analyser.make_metadata(),
filter=lambda a, v: v is not None,
)
else:
metadata = {}
metadata['joinpoints'] = list(
map(lambda p: p.to_metadata_value(), self._join_points)
)
assert self._file_manager.curr_path is not None
path = extra_metadata_path(self._file_manager.curr_path)
with open(path, 'wt', encoding='utf8') as file:
json.dump(metadata, file)
logger.debug('The extra metadata has been saved')
@attr.s(auto_attribs=True, slots=True, frozen=True)
class JoinPoint:
offset: int
timestamp: int # milliseconds
seamless: bool
@classmethod
def from_metadata_value(cls, value: JoinPointData) -> JoinPoint:
return cls(
offset=int(value['offset']),
timestamp=int(value['timestamp']),
seamless=value['seamless'],
)
def to_metadata_value(self) -> JoinPointData:
return dict(
offset=float(self.offset),
timestamp=float(self.timestamp),
seamless=self.seamless,
)
def __str__(self) -> str:
return 'offset: {}, timestamp: {}, seamless: {}'.format(
format_offest(self.offset),
format_timestamp(self.timestamp),
'yes' if self.seamless else 'no',
)
class JoinPointData(TypedDict):
offset: float
timestamp: float
seamless: bool
class OutputFileManager(Protocol):
@property
def curr_path(self) -> Optional[str]:
...
@property
def curr_file(self) -> Optional[BinaryIO]:
...
def create_file(self) -> BinaryIO:
...
def close_file(self) -> None:
...
class BaseOutputFileManager(ABC):
def __init__(self, buffer_size: Optional[int] = None) -> None:
super().__init__()
self.buffer_size = buffer_size or io.DEFAULT_BUFFER_SIZE # bytes
self._paths: List[str] = []
self._curr_path: Optional[str] = None
self._curr_file: Optional[BinaryIO] = None
@property
def curr_path(self) -> Optional[str]:
return self._curr_path
@property
def curr_file(self) -> Optional[BinaryIO]:
return self._curr_file
def has_file(self) -> bool:
return len(self._paths) > 1
def get_files(self) -> Iterator[str]:
for file in self._paths:
yield file
def clear_files(self) -> None:
self._paths.clear()
def create_file(self) -> BinaryIO:
assert self._curr_file is None
path = self._make_path()
file = open(path, mode='w+b', buffering=self.buffer_size)
self._paths.append(path)
self._curr_path = path
self._curr_file = file
return file
def close_file(self) -> None:
assert self._curr_file is not None
self._curr_file.close()
self._curr_path = None
self._curr_file = None
@abstractmethod
def _make_path(self) -> str:
...
class RobustFlvReader(FlvReader):
def read_tag(self, *, no_body: bool = False) -> FlvTag:
count = 0
while True:
try:
tag = super().read_tag(no_body=no_body)
except FlvTagError as e:
logger.warning(f'Invalid tag: {repr(e)}')
self._parser.parse_previous_tag_size()
count += 1
if count > 3:
raise
else:
count = 0
return tag
class FlvReaderWithTimestampFix(RobustFlvReader):
def __init__(
self,
stream: RandomIO,
backup_timestamp: bool = False,
restore_timestamp: bool = False,
) -> None:
super().__init__(
stream,
backup_timestamp=backup_timestamp,
restore_timestamp=restore_timestamp,
)
self._last_tag: Optional[FlvTag] = None
self._last_video_tag: Optional[VideoTag] = None
self._last_audio_tag: Optional[AudioTag] = None
self._delta = 0
# 15 is probably the minimal frame rate
self._frame_rate = 15.0
self._video_frame_interval = math.ceil(1000 / self._frame_rate)
# AAC SoundRate always is 44 KHz
self._sound_sample_interval = math.ceil(1000 / 44)
@property
def frame_rate(self) -> float:
return self._frame_rate
@property
def sound_sample_interval(self) -> int:
return self._sound_sample_interval
@property
def video_frame_interval(self) -> int:
return self._video_frame_interval
def read_tag(self, *, no_body: bool = False) -> FlvTag:
while True:
tag = super().read_tag(no_body=no_body)
if self._last_tag is None:
if is_video_tag(tag) or is_audio_tag(tag):
self._update_last_tags(tag)
elif is_metadata_tag(tag):
self._update_parameters(tag)
return tag
if not is_video_tag(tag) and not is_audio_tag(tag):
return tag
if self._is_ts_rebounded(tag):
self._update_delta(tag)
logger.warning(
f'Timestamp rebounded, updated delta: {self._delta}\n'
f'last video tag: {self._last_video_tag}\n'
f'last audio tag: {self._last_audio_tag}\n'
f'current tag: {tag}'
)
if self._is_ts_jumped(tag):
self._update_delta(tag)
logger.warning(
f'Timestamp jumped, updated delta: {self._delta}\n'
f'last tag: {self._last_tag}\n'
f'current tag: {tag}'
)
self._update_last_tags(tag)
return self._correct_ts(tag)
def rread_tag(self, *, no_body: bool = False) -> FlvTag:
raise NotImplementedError()
def read_body(self, tag: FlvTag) -> bytes:
raise NotImplementedError()
def calc_interval(self, tag: FlvTag) -> int:
if is_audio_tag(tag):
return self._sound_sample_interval
elif is_video_tag(tag):
return self._video_frame_interval
else:
logger.warning(f'Unexpected tag type: {tag}')
return min(self._sound_sample_interval, self._video_frame_interval)
def _is_ts_rebounded(self, tag: FlvTag) -> bool:
if is_video_tag(tag):
if self._last_video_tag is None:
return False
if is_video_sequence_header(self._last_video_tag):
return tag.timestamp < self._last_video_tag.timestamp
else:
return tag.timestamp <= self._last_video_tag.timestamp
elif is_audio_tag(tag):
if self._last_audio_tag is None:
return False
if is_audio_sequence_header(self._last_audio_tag):
return tag.timestamp < self._last_audio_tag.timestamp
else:
return tag.timestamp <= self._last_audio_tag.timestamp
else:
return False
def _is_ts_jumped(self, tag: FlvTag) -> bool:
assert self._last_tag is not None
return (
tag.timestamp - self._last_tag.timestamp >
max(self._sound_sample_interval, self._video_frame_interval)
)
def _update_last_tags(self, tag: FlvTag) -> None:
self._last_tag = tag
if is_video_tag(tag):
self._last_video_tag = tag
elif is_audio_tag(tag):
self._last_audio_tag = tag
def _update_parameters(self, tag: ScriptTag) -> None:
metadata = parse_metadata(tag)
frame_rate = metadata.get('fps') or metadata.get('framerate')
if not frame_rate:
return
self._frame_rate = frame_rate
self._video_frame_interval = math.ceil(1000 / frame_rate)
logger.debug('frame rate: {}, video frame interval: {}'.format(
frame_rate, self._video_frame_interval
))
def _update_delta(self, tag: FlvTag) -> None:
assert self._last_tag is not None
self._delta = (
self._last_tag.timestamp + self._delta - tag.timestamp +
self.calc_interval(tag)
)
def _correct_ts(self, tag: FlvTag) -> FlvTag:
if self._delta == 0:
return tag
return tag.evolve(timestamp=tag.timestamp + self._delta)

13
src/blrec/postprocess/ffmpeg_metadata.py
View File

@ -1,13 +1,12 @@
import logging
import json
import logging
from typing import Iterable, cast
import aiofiles
from .helpers import get_metadata, get_extra_metadata
from ..flv.stream_processor import JoinPoint
from ..flv.helpers import make_comment_for_joinpoints
from ..flv.operators import JoinPoint
from .helpers import get_extra_metadata, get_metadata
logger = logging.getLogger(__name__)
@ -27,7 +26,7 @@ async def _make_metadata_content(flv_path: str) -> str:
comment = cast(str, metadata.get('Comment', ''))
chapters = ''
if (join_points := extra_metadata.get('joinpoints')):
if join_points := extra_metadata.get('joinpoints'):
join_points = list(map(JoinPoint.from_metadata_value, join_points))
comment += '\n\n' + make_comment_for_joinpoints(join_points)
duration = int(cast(float, metadata['duration']) * 1000)
@ -49,9 +48,7 @@ Comment={comment}
"""
def _make_chapters(
join_points: Iterable[JoinPoint], duration: int
) -> str:
def _make_chapters(join_points: Iterable[JoinPoint], duration: int) -> str:
join_points = filter(lambda p: not p.seamless, join_points)
timestamps = list(map(lambda p: p.timestamp, join_points))
if not timestamps:

116
src/blrec/postprocess/postprocessor.py
View File

@ -1,28 +1,27 @@
from __future__ import annotations
import asyncio
import logging
from pathlib import PurePath
from contextlib import suppress
from pathlib import PurePath
from typing import Any, Awaitable, Dict, Iterator, List, Optional, Union
from rx.core.typing import Scheduler
from rx.scheduler.threadpoolscheduler import ThreadPoolScheduler
from reactivex.scheduler import ThreadPoolScheduler
from .models import PostprocessorStatus, DeleteStrategy
from .typing import Progress
from .remuxer import remux_video, RemuxProgress, RemuxResult
from .helpers import discard_file, get_extra_metadata
from .ffmpeg_metadata import make_metadata_file
from ..event.event_emitter import EventListener, EventEmitter
from ..bili.live import Live
from ..core import Recorder, RecorderEventListener
from ..exception import submit_exception
from ..utils.mixins import AsyncStoppableMixin, AsyncCooperationMixin
from ..path import extra_metadata_path
from ..flv.metadata_injector import inject_metadata, InjectProgress
from ..event.event_emitter import EventEmitter, EventListener
from ..exception import exception_callback, submit_exception
from ..flv.helpers import is_valid_flv_file
from ..flv.metadata_injection import InjectingProgress, inject_metadata
from ..logging.room_id import aio_task_with_room_id
from ..path import extra_metadata_path
from ..utils.mixins import AsyncCooperationMixin, AsyncStoppableMixin, SupportDebugMixin
from .ffmpeg_metadata import make_metadata_file
from .helpers import discard_file, get_extra_metadata
from .models import DeleteStrategy, PostprocessorStatus
from .remux import RemuxingProgress, RemuxingResult, remux_video
from .typing import Progress
__all__ = (
'Postprocessor',
@ -47,6 +46,7 @@ class Postprocessor(
RecorderEventListener,
AsyncStoppableMixin,
AsyncCooperationMixin,
SupportDebugMixin,
):
def __init__(
self,
@ -58,6 +58,7 @@ class Postprocessor(
delete_source: DeleteStrategy = DeleteStrategy.AUTO,
) -> None:
super().__init__()
self._init_for_debug(live.room_id)
self._live = live
self._recorder = recorder
@ -94,14 +95,10 @@ class Postprocessor(
# clear completed files of previous recording
self._completed_files.clear()
async def on_video_file_completed(
self, recorder: Recorder, path: str
) -> None:
async def on_video_file_completed(self, recorder: Recorder, path: str) -> None:
self._queue.put_nowait(path)
async def on_danmaku_file_completed(
self, recorder: Recorder, path: str
) -> None:
async def on_danmaku_file_completed(self, recorder: Recorder, path: str) -> None:
self._completed_files.append(path)
async def _do_start(self) -> None:
@ -110,6 +107,7 @@ class Postprocessor(
self._queue: asyncio.Queue[str] = asyncio.Queue()
self._scheduler = ThreadPoolScheduler()
self._task = asyncio.create_task(self._worker())
self._task.add_done_callback(exception_callback)
logger.debug('Started postprocessor')
@ -150,12 +148,11 @@ class Postprocessor(
else:
result_path = video_path
await discard_file(extra_metadata_path(video_path), 'DEBUG')
if not self._debug:
await discard_file(extra_metadata_path(video_path), 'DEBUG')
self._completed_files.append(result_path)
await self._emit(
'video_postprocessing_completed', self, result_path,
)
await self._emit('video_postprocessing_completed', self, result_path)
except Exception as exc:
submit_exception(exc)
finally:
@ -164,9 +161,13 @@ class Postprocessor(
async def _inject_extra_metadata(self, path: str) -> str:
try:
metadata = await get_extra_metadata(path)
await self._inject_metadata(path, metadata, self._scheduler)
logger.info(f"Injecting metadata for '{path}' ...")
await self._inject_metadata(path, metadata)
except Exception as e:
logger.error(f"Failed to inject metadata for '{path}': {repr(e)}")
submit_exception(e)
else:
logger.info(f"Successfully injected metadata for '{path}'")
return path
async def _remux_flv_to_mp4(self, in_path: str) -> str:
@ -174,12 +175,10 @@ class Postprocessor(
logger.info(f"Remuxing '{in_path}' to '{out_path}' ...")
metadata_path = await make_metadata_file(in_path)
remux_result = await self._remux_video(
in_path, out_path, metadata_path, self._scheduler
)
remux_result = await self._remux_video(in_path, out_path, metadata_path)
if remux_result.is_successful():
logger.info(f"Successfully remux '{in_path}' to '{out_path}'")
logger.info(f"Successfully remuxed '{in_path}' to '{out_path}'")
result_path = out_path
elif remux_result.is_warned():
logger.warning('Remuxing done, but ran into problems.')
@ -192,65 +191,54 @@ class Postprocessor(
logger.debug(f'ffmpeg output:\n{remux_result.output}')
await discard_file(metadata_path, 'DEBUG')
if not self._debug:
await discard_file(metadata_path, 'DEBUG')
if self._should_delete_source_files(remux_result):
await discard_file(in_path)
return result_path
def _inject_metadata(
self,
path: str,
metadata: Dict[str, Any],
scheduler: Scheduler,
) -> Awaitable[None]:
def _inject_metadata(self, path: str, metadata: Dict[str, Any]) -> Awaitable[None]:
future: asyncio.Future[None] = asyncio.Future()
self._postprocessing_path = path
def on_next(value: InjectProgress) -> None:
def on_next(value: InjectingProgress) -> None:
self._postprocessing_progress = value
inject_metadata(
path,
metadata,
report_progress=True,
room_id=self._live.room_id,
).subscribe(
on_next,
lambda e: future.set_exception(e),
lambda: future.set_result(None),
scheduler=scheduler,
subscription = inject_metadata(path, metadata, show_progress=True).subscribe(
on_next=on_next,
on_error=lambda e: future.set_exception(e),
on_completed=lambda: future.set_result(None),
scheduler=self._scheduler,
)
future.add_done_callback(lambda f: subscription.dispose())
return future
def _remux_video(
self,
in_path: str,
out_path: str,
metadata_path: str,
scheduler: Scheduler,
) -> Awaitable[RemuxResult]:
future: asyncio.Future[RemuxResult] = asyncio.Future()
self, in_path: str, out_path: str, metadata_path: str
) -> Awaitable[RemuxingResult]:
future: asyncio.Future[RemuxingResult] = asyncio.Future()
self._postprocessing_path = in_path
def on_next(value: Union[RemuxProgress, RemuxResult]) -> None:
if isinstance(value, RemuxProgress):
def on_next(value: Union[RemuxingProgress, RemuxingResult]) -> None:
if isinstance(value, RemuxingProgress):
self._postprocessing_progress = value
elif isinstance(value, RemuxResult):
elif isinstance(value, RemuxingResult):
future.set_result(value)
remux_video(
subscription = remux_video(
in_path,
out_path,
metadata_path,
report_progress=True,
show_progress=True,
remove_filler_data=True,
).subscribe(
on_next,
lambda e: future.set_exception(e),
scheduler=scheduler,
on_next=on_next,
on_error=lambda e: future.set_exception(e),
scheduler=self._scheduler,
)
future.add_done_callback(lambda f: subscription.dispose())
return future
@ -258,9 +246,7 @@ class Postprocessor(
loop = asyncio.get_running_loop()
return await loop.run_in_executor(None, is_valid_flv_file, video_path)
def _should_delete_source_files(
self, remux_result: RemuxResult
) -> bool:
def _should_delete_source_files(self, remux_result: RemuxingResult) -> bool:
if self.delete_source == DeleteStrategy.AUTO:
if not remux_result.is_failed():
return True

158
src/blrec/postprocess/remux.py Normal file
View File

@ -0,0 +1,158 @@
import os
import re
import shlex
from subprocess import PIPE, Popen
from typing import Any, Final, List, Optional, Union
import attr
from reactivex import Observable, abc, create
from reactivex.disposable import CompositeDisposable, Disposable, SerialDisposable
from reactivex.scheduler.currentthreadscheduler import CurrentThreadScheduler
from tqdm import tqdm
__all__ = 'RemuxingResult', 'remux_video'
@attr.s(auto_attribs=True, slots=True, frozen=True)
class RemuxingProgress:
count: int
total: int
@attr.s(auto_attribs=True, slots=True, frozen=True)
class RemuxingResult:
return_code: int
output: str
def is_done(self) -> bool:
return self.return_code == 0
def is_successful(self) -> bool:
return self.is_done() and not self.may_timestamps_incorrect()
def is_warned(self) -> bool:
return self.is_done() and self.may_timestamps_incorrect()
def is_failed(self) -> bool:
return not self.is_done()
def may_timestamps_incorrect(self) -> bool:
return 'Non-monotonous DTS in output stream' in self.output
def remux_video(
in_path: str,
out_path: str,
metadata_path: Optional[str] = None,
*,
show_progress: bool = False,
remove_filler_data: bool = False,
) -> Observable[Union[RemuxingProgress, RemuxingResult]]:
SIZE_PATTERN: Final = re.compile(r'size=\s*(?P<number>\d+)(?P<unit>[a-zA-Z]?B)')
filesize = os.path.getsize(in_path)
filename = os.path.basename(in_path)
def parse_size(line: str) -> int:
match = SIZE_PATTERN.search(line)
assert match is not None
result = match.groupdict()
unit = result['unit']
number = int(result['number'])
if unit == 'B':
size = number
elif unit == 'kB':
size = 1024 * number
elif unit == 'MB':
size = 1024**2 * number
elif unit == 'GB':
size = 1024**3 * number
else:
raise ValueError(unit)
return size
def should_output_line(line: str) -> bool:
line = line.strip()
return not (line.startswith('frame=') or line.startswith('Press [q]'))
def subscribe(
observer: abc.ObserverBase[Union[RemuxingProgress, RemuxingResult]],
scheduler: Optional[abc.SchedulerBase] = None,
) -> abc.DisposableBase:
_scheduler = scheduler or CurrentThreadScheduler.singleton()
disposed = False
cancelable = SerialDisposable()
def action(scheduler: abc.SchedulerBase, state: Optional[Any] = None) -> None:
if disposed:
return
with tqdm(
desc='Remuxing',
total=filesize,
unit='B',
unit_scale=True,
unit_divisor=1024,
postfix=filename,
disable=not show_progress,
) as pbar:
cmd = f'ffmpeg -i "{in_path}"'
if metadata_path is not None:
cmd += f' -i "{metadata_path}" -map_metadata 1'
cmd += ' -codec copy'
if remove_filler_data:
# https://forum.doom9.org/showthread.php?t=152051
# ISO_IEC_14496-10_2020(E)
# Table 7-1 – NAL unit type codes, syntax element categories, and NAL unit type classes # noqa
# 7.4.2.7 Filler data RBSP semantics
cmd += ' -bsf:v filter_units=remove_types=12'
cmd += f' "{out_path}" -y'
args = shlex.split(cmd)
out_lines: List[str] = []
try:
with Popen(
args, stderr=PIPE, encoding='utf8', errors='backslashreplace'
) as process:
assert process.stderr is not None
while not disposed:
line = process.stderr.readline()
if not line:
if process.poll() is not None:
break
else:
continue
if line.startswith('frame='):
size = parse_size(line)
pbar.update(size - pbar.n)
progress = RemuxingProgress(size, filesize)
observer.on_next(progress)
if should_output_line(line):
out_lines.append(line)
if not disposed and process.returncode == 0:
pbar.update(filesize)
progress = RemuxingProgress(filesize, filesize)
observer.on_next(progress)
except Exception as e:
observer.on_error(e)
else:
result = RemuxingResult(process.returncode, ''.join(out_lines))
observer.on_next(result)
observer.on_completed()
cancelable.disposable = _scheduler.schedule(action)
def dispose() -> None:
nonlocal disposed
disposed = True
return CompositeDisposable(cancelable, Disposable(dispose))
return create(subscribe)

193
src/blrec/postprocess/remuxer.py
View File

@ -1,193 +0,0 @@
import os
import re
import shlex
from subprocess import Popen, PIPE
from typing import Final, List, Match, Optional, Union
import attr
from rx import create, operators as op
from rx.subject import Subject
from rx.core import Observable
from rx.core.typing import Observer, Scheduler, Disposable
from rx.scheduler.currentthreadscheduler import CurrentThreadScheduler
from tqdm import tqdm
__all__ = 'VideoRemuxer', 'RemuxResult', 'remux_video'
@attr.s(auto_attribs=True, slots=True, frozen=True)
class RemuxProgress:
time: int
duration: int
@attr.s(auto_attribs=True, slots=True, frozen=True)
class RemuxResult:
return_code: int
output: str
def is_done(self) -> bool:
return self.return_code == 0
def is_successful(self) -> bool:
return self.is_done() and not self.may_timestamps_incorrect()
def is_warned(self) -> bool:
return self.is_done() and self.may_timestamps_incorrect()
def is_failed(self) -> bool:
return not self.is_done()
def may_timestamps_incorrect(self) -> bool:
return 'Non-monotonous DTS in output stream' in self.output
class VideoRemuxer:
_TIME_PATTERN: Final = re.compile(
r'(?P<hour>\d+):(?P<minute>\d+):(?P<second>\d+).(?P<millisecond>\d+)'
)
def __init__(self) -> None:
self._duration: int = 0
self._progress_updates = Subject()
@property
def progress_updates(self) -> Observable:
return self._progress_updates
def remux(
self,
in_path: str,
out_path: str,
metadata_path: Optional[str] = None,
*,
remove_filler_data: bool = False,
) -> RemuxResult:
cmd = f'ffmpeg -i "{in_path}"'
if metadata_path is not None:
cmd += f' -i "{metadata_path}" -map_metadata 1'
cmd += ' -codec copy'
if remove_filler_data:
# https://forum.doom9.org/showthread.php?t=152051
# ISO_IEC_14496-10_2020(E)
# Table 7-1 – NAL unit type codes, syntax element categories, and NAL unit type classes # noqa
# 7.4.2.7 Filler data RBSP semantics
cmd += ' -bsf:v filter_units=remove_types=12'
cmd += f' "{out_path}" -y'
args = shlex.split(cmd)
out_lines: List[str] = []
with Popen(
args, stderr=PIPE, encoding='utf8', errors='backslashreplace'
) as process:
assert process.stderr is not None
while True:
line = process.stderr.readline()
if not line:
if process.poll() is not None:
break
else:
continue
self._parse_line(line)
if self._should_output_line(line):
out_lines.append(line)
if process.returncode == 0:
self._complete_progress_updates()
return RemuxResult(process.returncode, ''.join(out_lines))
def _parse_line(self, line: str) -> None:
line = line.strip()
if line.startswith('frame='):
self._parse_time(line)
elif line.startswith('Duration:'):
self._parse_duration(line)
else:
pass
def _parse_duration(self, line: str) -> None:
match = self._TIME_PATTERN.search(line)
if match is not None:
self._duration = self._calc_time(match)
self._progress_updates.on_next(RemuxProgress(0, self._duration))
def _parse_time(self, line: str) -> None:
match = self._TIME_PATTERN.search(line)
if match is not None:
progress = RemuxProgress(self._calc_time(match), self._duration)
self._progress_updates.on_next(progress)
def _complete_progress_updates(self) -> None:
progress = RemuxProgress(self._duration, self._duration)
self._progress_updates.on_next(progress)
self._progress_updates.on_completed()
def _calc_time(self, match: Match[str]) -> int:
result = match.groupdict()
return (
int(result['hour']) * 60 * 60 * 1000 +
int(result['minute']) * 60 * 1000 +
int(result['second']) * 1000 +
int(result['millisecond'])
)
def _should_output_line(self, line: str) -> bool:
line = line.strip()
return not (
line.startswith('frame=') or
line.startswith('Press [q]')
)
def remux_video(
in_path: str,
out_path: str,
metadata_path: Optional[str] = None,
*,
report_progress: bool = False,
remove_filler_data: bool = False,
) -> Observable:
def subscribe(
observer: Observer[Union[RemuxProgress, RemuxResult]],
scheduler: Optional[Scheduler] = None,
) -> Disposable:
_scheduler = scheduler or CurrentThreadScheduler.singleton()
def action(scheduler, state): # type: ignore
remuxer = VideoRemuxer()
file_name = os.path.basename(in_path)
with tqdm(desc='Remuxing', unit='ms', postfix=file_name) as pbar:
def reset(progress: RemuxProgress) -> None:
pbar.reset(progress.duration)
def update(progress: RemuxProgress) -> None:
pbar.update(progress.time - pbar.n)
remuxer.progress_updates.pipe(op.first()).subscribe(reset)
remuxer.progress_updates.pipe(op.skip(1)).subscribe(update)
if report_progress:
remuxer.progress_updates.subscribe(
lambda p: observer.on_next(p)
)
try:
result = remuxer.remux(
in_path,
out_path,
metadata_path,
remove_filler_data=remove_filler_data,
)
except Exception as e:
observer.on_error(e)
else:
observer.on_next(result)
observer.on_completed()
return _scheduler.schedule(action)
return create(subscribe)

9
src/blrec/postprocess/typing.py
View File

@ -1,9 +1,6 @@
from typing import Union
from ..flv.metadata_injection import InjectingProgress
from .remux import RemuxingProgress
from .remuxer import RemuxProgress
from ..flv.metadata_injector import InjectProgress
Progress = Union[RemuxProgress, InjectProgress]
Progress = Union[RemuxingProgress, InjectingProgress]

16
src/blrec/task/task.py
View File

@ -18,12 +18,11 @@ from ..bili.danmaku_client import DanmakuClient
from ..bili.live_monitor import LiveMonitor
from ..bili.typing import StreamFormat, QualityNumber
from ..core import Recorder
from ..core.stream_analyzer import StreamProfile
from ..flv.operators import MetaData, StreamProfile
from ..core.cover_downloader import CoverSaveStrategy
from ..postprocess import Postprocessor, PostprocessorStatus, DeleteStrategy
from ..postprocess.remuxer import RemuxProgress
from ..flv.metadata_injector import InjectProgress
from ..flv.data_analyser import MetaData
from ..postprocess.remux import RemuxingProgress
from ..flv.metadata_injection import InjectingProgress
from ..event.event_submitters import (
LiveEventSubmitter, RecorderEventSubmitter, PostprocessorEventSubmitter
)
@ -151,10 +150,15 @@ class RecordTask:
status = VideoFileStatus.RECORDING
elif path == self._postprocessor.postprocessing_path:
progress = self._postprocessor.postprocessing_progress
if isinstance(progress, RemuxProgress):
if isinstance(progress, RemuxingProgress):
status = VideoFileStatus.REMUXING
elif isinstance(progress, InjectProgress):
elif isinstance(progress, InjectingProgress):
status = VideoFileStatus.INJECTING
else:
if self._postprocessor.remux_to_mp4:
status = VideoFileStatus.REMUXING
else:
status = VideoFileStatus.INJECTING
else:
# disabling recorder by force or stoping task by force
status = VideoFileStatus.BROKEN

3
src/blrec/task/task_manager.py
View File

@ -13,8 +13,7 @@ from tenacity import (
from .task import RecordTask
from .models import TaskData, TaskParam, VideoFileDetail, DanmakuFileDetail
from ..flv.data_analyser import MetaData
from ..core.stream_analyzer import StreamProfile
from ..flv.operators import MetaData, StreamProfile
from ..exception import submit_exception, NotFoundError
from ..bili.exceptions import ApiRequestError
if TYPE_CHECKING:

36
src/blrec/core/stream_analyzer.py → src/blrec/utils/ffprobe.py
View File

@ -1,31 +1,25 @@
from __future__ import annotations
import json
import logging
from subprocess import Popen, PIPE
from typing import Dict, Any, Optional
from subprocess import PIPE, Popen
from typing import Any, Dict, Optional
from rx import create
from rx.core import Observable
from rx.core.typing import Observer, Scheduler, Disposable
from rx.scheduler.newthreadscheduler import NewThreadScheduler
logger = logging.getLogger(__name__)
__all__ = 'ffprobe', 'StreamProfile'
from reactivex import Observable, abc
from reactivex.scheduler import NewThreadScheduler
__all__ = ('ffprobe', 'StreamProfile')
StreamProfile = Dict[str, Any]
def ffprobe(data: bytes) -> Observable:
def ffprobe(data: bytes) -> Observable[StreamProfile]:
def subscribe(
observer: Observer[StreamProfile],
scheduler: Optional[Scheduler] = None,
) -> Disposable:
observer: abc.ObserverBase[StreamProfile],
scheduler: Optional[abc.SchedulerBase] = None,
) -> abc.DisposableBase:
_scheduler = scheduler or NewThreadScheduler()
def action(scheduler, state): # type: ignore
def action(scheduler: abc.SchedulerBase, state: Optional[Any] = None) -> None:
args = [
'ffprobe',
'-show_streams',
@ -35,9 +29,7 @@ def ffprobe(data: bytes) -> Observable:
'pipe:0',
]
with Popen(
args, stdin=PIPE, stdout=PIPE, stderr=PIPE
) as process:
with Popen(args, stdin=PIPE, stdout=PIPE, stderr=PIPE) as process:
try:
stdout, stderr = process.communicate(data, timeout=10)
except Exception as e:
@ -51,4 +43,4 @@ def ffprobe(data: bytes) -> Observable:
return _scheduler.schedule(action)
return create(subscribe)
return Observable(subscribe)

2
src/blrec/utils/mixins.py
View File

@ -120,7 +120,7 @@ class AsyncCooperationMixin(ABC):
super().__init__()
self._loop = asyncio.get_running_loop()
def _handle_exception(self, exc: BaseException) -> None:
def _submit_exception(self, exc: BaseException) -> None:
from ..exception import submit_exception
async def wrapper() -> None:

4
src/blrec/utils/operators/__init__.py Normal file
View File

@ -0,0 +1,4 @@
from .replace import replace
from .retry import retry
__all__ = ('replace', 'retry')

29
src/blrec/utils/operators/replace.py Normal file
View File

@ -0,0 +1,29 @@
import os
from typing import Callable, Optional, TypeVar
from reactivex import Observable, abc
_T = TypeVar('_T')
def replace(src_path: str, dst_path: str) -> Callable[[Observable[_T]], Observable[_T]]:
def _replace(source: Observable[_T]) -> Observable[_T]:
def subscribe(
observer: abc.ObserverBase[_T],
scheduler: Optional[abc.SchedulerBase] = None,
) -> abc.DisposableBase:
def on_completed() -> None:
try:
os.replace(src_path, dst_path)
except Exception as e:
observer.on_error(e)
else:
observer.on_completed()
return source.subscribe(
observer.on_next, observer.on_error, on_completed, scheduler=scheduler
)
return Observable(subscribe)
return _replace

46
src/blrec/utils/operators/retry.py Normal file
View File

@ -0,0 +1,46 @@
import time
from typing import Callable, Iterator, Optional, TypeVar
from reactivex import Observable, abc, catch_with_iterable
from reactivex import operators as ops
_T = TypeVar('_T')
def retry(
count: Optional[int] = None,
delay: Optional[float] = None,
should_retry: Callable[[Exception], bool] = lambda _: True,
) -> Callable[[Observable[_T]], Observable[_T]]:
def _retry(source: Observable[_T]) -> Observable[_T]:
def subscribe(
observer: abc.ObserverBase[_T],
scheduler: Optional[abc.SchedulerBase] = None,
) -> abc.DisposableBase:
exception: Optional[Exception] = None
def counter() -> Iterator[int]:
n = 0
while True:
if exception is not None:
if not should_retry(exception):
break
if count is not None and n > count:
break
if delay:
time.sleep(delay)
yield n
n += 1
def on_error(e: Exception) -> None:
nonlocal exception
exception = e
_source = source.pipe(ops.do_action(on_error=on_error))
return catch_with_iterable(_source for _ in counter()).subscribe(
observer, scheduler=scheduler
)
return Observable(subscribe)
return _retry

4
webapp/src/app/shared/pipes/progress.pipe.ts
View File

@ -7,9 +7,9 @@ import { Progress } from 'src/app/tasks/shared/task.model';
})
export class ProgressPipe implements PipeTransform {
transform(progress: Progress): number {
if (!progress || progress.duration === 0) {
if (!progress || progress.total === 0) {
return 0;
}
return Math.round((progress.time / progress.duration) * 100);
return Math.round((progress.count / progress.total) * 100);
}
}

4
webapp/src/app/tasks/shared/task.model.ts
View File

@ -74,8 +74,8 @@ export enum PostprocessorStatus {
}
export interface Progress {
time: number;
duration: number;
count: number;
total: number;
}
export interface TaskStatus {