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sources/tech/20210820 How to Download Audio Only Using youtube-dl.md → translated/tech/20210820 How to Download Audio Only Using youtube-dl.md
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How to Download Audio Only Using youtube-dl 如何使用 youtube-dl 只下载音频
====== ======
[youtube-dl][1] is a versatile command line tool for downloading videos from YouTube and many other websites. I use it for making back up of my own YouTube videos. [youtube-dl][1] 是一个多功能的命令行工具，用于从 YouTube 和许多其他网站下载视频。我用它来做我自己的 YouTube 视频的备份。
By default, you [use youtube-dl for downloading videos][2]. How about extracting only the audio with youtubde-dl? That’s very simple actually. Let me show you the steps. 默认情况下，你[使用 youtube-dl 下载视频][2]。用 youtube-dl 只提取音频怎么样？ 其实很简单。让我告诉你步骤。
Attention 注意
Downloading videos from websites could be against their policies. It’s up to you if you choose to download videos or audio. 从网站下载视频可能违反他们的政策。这取决于你是否选择下载视频或音频。
### Download only audio with youtube-dl ### 使用 youtube-dl 只下载音频
Please make sure that you have installed youtube-dl on your Linux distribution first. 请确保你已经在你的 Linux 发行版上安装了 youtube-dl。
``` ```
sudo snap install youtube-dl sudo snap install youtube-dl
``` ```
If you only want to download audio from a YouTube video, you can use the -x option with youtube-dl. This extract-audio option converts the video files to audio-only files. 如果你只想从 YouTube 视频中下载音频，你可以使用 youtube-dl 的 -x 选项。这个提取音频的选项将视频文件转换为纯音频文件。
``` ```
youtube-dl -x video_URL youtube-dl -x video_URL
``` ```
The file is saved in the same directory from where you ran the youtube-dl command. 该文件被保存在你运行 youtube-dl 命令的同一目录下。
Here’s an example where I downloaded the voice-over of our Zorin OS 16 review video. 这是我下载 Zorin OS 16 评论视频的画外音的示例。
``` ```
youtube-dl -x https://www.youtube.com/watch?v=m_PmLG7HqbQ youtube-dl -x https://www.youtube.com/watch?v=m_PmLG7HqbQ
@ -45,15 +45,15 @@ youtube-dl -x https://www.youtube.com/watch?v=m_PmLG7HqbQ
[ffmpeg] Post-process file Zorin OS 16 Review - It's a Visual Masterpiece-m_PmLG7HqbQ.m4a exists, skipping [ffmpeg] Post-process file Zorin OS 16 Review - It's a Visual Masterpiece-m_PmLG7HqbQ.m4a exists, skipping
``` ```
Did you notice the audio format? It is in .m4a format. You may specify the audio format to something of your choice. 你注意到音频格式了吗？它是 .m4a 格式。你可以把音频格式指定为你所选择的格式。
Say you want to extract the audio in MP3 format. You can use it like this: 比如你想提取 MP3 格式的音频。你可以像这样使用它：
``` ```
youtube-dl -x --audio-format mp3 video_URL youtube-dl -x --audio-format mp3 video_URL
``` ```
Here’s the same example I showed previously. You can see that it [uses ffmpeg to convert][3] the m4a file into mp3. 下面是我之前展示的同一个例子。你可以看到它[使用 ffmpeg 转换][3] m4a 文件为 mp3：
``` ```
youtube-dl -x --audio-format mp3 https://www.youtube.com/watch?v=m_PmLG7HqbQ youtube-dl -x --audio-format mp3 https://www.youtube.com/watch?v=m_PmLG7HqbQ
@ -65,33 +65,33 @@ youtube-dl -x --audio-format mp3 https://www.youtube.com/watch?v=m_PmLG7HqbQ
Deleting original file Zorin OS 16 Review - It's a Visual Masterpiece-m_PmLG7HqbQ.m4a (pass -k to keep) Deleting original file Zorin OS 16 Review - It's a Visual Masterpiece-m_PmLG7HqbQ.m4a (pass -k to keep)
``` ```
### Download entire YouTube playlist in MP3 format ### 以 MP3 格式下载整个 YouTube 播放列表
Yes, you can totally do that. The main thing is to get the URL of the playlist here. It is typically in the following format: 是的，你完全可以这样做。最主要的是要在这里得到播放列表的 URL。它通常是以下格式：
``` ```
https://www.youtube.com/playlist?list=XXXXXXXXXXXXXXXXXXX https://www.youtube.com/playlist?list=XXXXXXXXXXXXXXXXXXX
``` ```
To get the URL of a playlist, click on its name when the playlist is being displayed in the right sidebar. 要获得一个播放列表的 URL，当播放列表显示在右边栏时，点击其名称。
![Click on the playlist title][4] ![Click on the playlist title][4]
It will take you to the playlist page and you can copy the URL here. 它将带你到播放列表页面，你可以在这里复制 URL。
![Grab the playlist URL][5] ![Grab the playlist URL][5]
Now that you have the playlist URL, you can use it to download the audio files in MP3 format in the following fashion: 现在你有了播放列表的 URL，你可以用它来下载 MP3 格式的音频文件，方法如下：
``` ```
youtube-dl --extract-audio --audio-format mp3 -o "%(title)s.%(ext)s" playlist_URL youtube-dl --extract-audio --audio-format mp3 -o "%(title)s.%(ext)s" playlist_URL
``` ```
That scary looking `-o "%(title)s.%(ext)s"` specifies the output file (with option -o) and instructs it to use the title of the video and the extension (mp3 in this case) for naming the audio files. 那个看起来很可怕的 `-o "%(title)s.%(ext)s"` 指定了输出文件（带选项 -o），并指示它使用视频的标题和扩展名（本例为 mp3）来命名音频文件。
![][6] ![][6]
I hope you find this quick tip helpful. Enjoy the audio files :) 我希望你觉得这个技巧对你有帮助。享受音频文件吧 :)
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@ -99,7 +99,7 @@ via: https://itsfoss.com/youtube-dl-audio-only/
作者：[Abhishek Prakash][a] 作者：[Abhishek Prakash][a]
选题：[lujun9972][b] 选题：[lujun9972][b]
译者：[译者ID](https://github.com/译者ID) 译者：[geekpi](https://github.com/geekpi)
校对：[校对者ID](https://github.com/校对者ID) 校对：[校对者ID](https://github.com/校对者ID)
本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出 本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出