refactor: workaround for negative timestamp

src/blrec/core/operators/exception_handler.py

@@ -28,6 +28,7 @@ class ExceptionHandler(AsyncCooperationMixin):
             scheduler: Optional[abc.SchedulerBase] = None,
         ) -> abc.DisposableBase:
             def on_error(exc: Exception) -> None:
+                logger.exception(repr(exc))
                 self._submit_exception(exc)
                 try:
                     raise exc

src/blrec/flv/format.py

@@ -197,6 +197,9 @@ class FlvDumper:
         self._writer.write_ui32(size)
 
     def dump_tag(self, tag: FlvTag) -> None:
+        if tag.timestamp < 0:
+            raise FlvDataError(f'Incorrect timestamp: {tag.timestamp}', tag)
+
         self.dump_flv_tag_header(tag)
 
         if tag.is_audio_tag():

src/blrec/flv/operators/dump.py

@@ -90,9 +90,6 @@ class Dumper:
                         self._timestamp_updates.on_next(0)
                     else:
                         if self._flv_writer is not None:
-                            # XXX: negative timestamp will cause
-                            # `struct.error: ubyte format requires 0 <= number <= 255`
-                            assert item.timestamp >= 0, item
                             size = self._flv_writer.write_tag(item)
                             self._size_updates.on_next(size)
                             self._timestamp_updates.on_next(item.timestamp)