Search code examples
pythonaudioyoutubeyoutube-dl

Download only audio from youtube video using youtube-dl in python script

There's a few posts on downloading audio from YouTube using youtube-dl, but none of them are concrete or too helpful. I'm wondering what the best way to do it from a Python script is.

For example, here's the README example for downloading videos:

import youtube_dl

ydl_opts = {}
with youtube_dl.YoutubeDL(ydl_opts) as ydl:
    ydl.download(['http://www.youtube.com/watch?v=BaW_jenozKc'])

Obviously if you just care about the audio, you'd rather not download the whole video...

Therefore, the youtube-dl source isn't very helpful

Any suggestions on how to script this?

Solution

  • Read on in the developer instructions for an amended example:

    from __future__ import unicode_literals
import youtube_dl


ydl_opts = {
    'format': 'bestaudio/best',
    'postprocessors': [{
        'key': 'FFmpegExtractAudio',
        'preferredcodec': 'mp3',
        'preferredquality': '192',
    }],
}
with youtube_dl.YoutubeDL(ydl_opts) as ydl:
    ydl.download(['http://www.youtube.com/watch?v=BaW_jenozKc'])

    This will download an audio file if possible/supported. If the file is not mp3 already, the downloaded file be converted to mp3 using ffmpeg or avconv. For more information, refer to the format and postprocessors documentation entries in a current version of youtube-dl.