I'd like to extract the audio out of any video file (not dvds).
I have easy access to OS X and Bash and I'm very comfortable with both.
The links at:
should help you do this.
The command-line tool ffmpeg can do this.
The above will work for MPEG audio (MP3, AAC), and AC3 and ALAC audio. If it is MP3 audio, you'd be better off using
If you want to extract any audio to a fairly high-quality MP3, use
If your video uses more than one audio track (different languages, for example) you can select a single audio track with: