I want to extract audio from a video downloaded with youtube-dl on windows. I got youtube-dl working, but am unable to extract the audio. This problem is caused due to not having the correct audio codes installed. When i try to extract audio it tells me the following:
'WARNING: unable to obtain file audio codes with ffprobe'
youtube-dl man sais the following: -x -extract-audio convert video files to audio-only files (requires ffmpeg or avconv and ffprobe or avprobe)
How do I install ffprobe or ffmpeg? Do I install this on windows, or do I install this as a python extension? I have no idea, can someone point me in the right direction?
OS: windows 7
ffmpeg is not a Python module. Take a look at the code of youtube-dl in the FFmpegExtractAudioPP class.
It uses this call to figure out if the executable exists or not. It checks in your current path:
subprocess.Popen([exe, '-version'], stdout=subprocess.PIPE, stderr=subprocess.PIPE).communicate()
You'll need to download the Windows builds of ffmpeg and put them in your current path, probably making sure that they do not have .exe at the end of their names.
A quick fix for windows users:
1.Download the ffmpeg package from http://ffmpeg.zeranoe.com/builds/, unzip it, copy ALL the contents of the Bin directory to the directory where youtube-dl.exe is located.
2.Using DOS navigate to the directory where youtube-dl is located and run using the command:
youtube-dl --extract-audio --audio-format mp3
U can use the rtsp stream url for the format type 1 feed listed in the common Youtube api.. call it for feed info...
get youtube feed which contains a number of urls...
get the 'format type 1' url
call that with an RTSP client and you can store the audio directly...
see 'youtube feed' in the above for how to get type 1 url
http://snipplr.com/view/63341/youtube-rtsp-cli-request--audio-track-only-p2/
see above for how to get audio once you have the url
more background at : http://snipplr.com/view/56509/youtube-rtsp-cli-request--audio-track-only/
来源：https://stackoverflow.com/questions/14185867/extract-audio-with-youtube-dl-on-windows