Making mp3d from video/audio source

I was actually looking around how to do it in ubuntu today. And to answer your question, use ffmpeg in console.

type:

ffmpeg -i -vn

the i means input and the vn means no video.

so,

ffmpeg -i tvshow.avi -vn tvshow.mp3

now you will have a mp3 rip of that avi file. Hope this helps.