i want to add tags to mp3 converted by youtube-dl & ffmpeg :
youtube-dl -o \'/Output/qpgTC9MDx1o.mp3\' qpgTC9MDx1o -f bestaudio --extract-audio
This is an old question. But if you're using a virtualenv with python, place the contents of the downloaded libav bin folder in the Scriptsfolder of your virtualenv.
bin
Scripts