http://www.mp3-box.org/extract-mp3-from-mp4-mac/
How do I rip/extract audio from a video clip in Mac OS X 10.5?
Its in .mp4 format. I’ve got pretty much every app on the face of the planet except the one I want for extracting the audio. I want the audio completely out of the video clip in .mp3 format if at all possible. I’ll download any app as long as its free.
thanks in advance!
You can try the DVD Video Converter Suite for Mac, it can help Mac OS X users not only rip DVD to AVI, MP4, MPEG, MOV, but also finish conversions among all common video format like convert AVI to MP4, convert MPEG to AVI, etc. With the DVD Converter Suite for Mac, you can easily put your favorite DVD and video on iPhone, iPod, PSP, Zune, Apple TV, YouTube, etc.
http://www.macdvdconverter.com/mac-dvd-converter.html
There is a step-by-step guide which will show you how to use the DVD Ripper for Mac to rip general DVD (copy-protected included) on Mac OS X (Leopard Supported).
http://www.macdvdconverter.com/guides/mac-aimersoft-dvd-ripper-guide.html
There is a step by step guide which is dedicating to demonstrate how to convert, trim, combine and edit video on Mac OS X .
http://www.macdvdconverter.com/guides/mac-aimersoft-video-converter-guide.html
Also, you can find some other software:
http://www.mac.com
Extract MP3 and MP4 files of YouTube