Good App for ripping audio from videos

[portcontrol7]

I want to listen to the audio from some videos I have that are a series of lectures on philosophy so I can listen to them on my cellphone. Can anyone recommend a quick and efficient way to take the audio from these several video files?

Thanks in advance.

 

[Dave Braine]

MPEGStreamclip. You can export just as an audio file.
http://www.squared5.com/svideo/mpeg-streamclip-mac.html

 

[gorskiegangsta]

Many video converters have a feature to extract audio from video.

Ones I've tried and liked
Wontube Free Video Converter (Mac App Store)
SmartConverter (Free on Mac App Store)