ITunes U: How to extract audio from video lectures

audiovideo

I download lots of lectures from iTunes U. The problem is, they usually come with video and there is no audio-only version for many.

How can I, using any software available for Snow Leopard, free or paid, extract the audio from a series of video files and end up with a series of audio files?

Any ideas?

Best Answer

Please try it with VLC, see Extract Audio in the Videolan wiki.