App store link: https://itunes.apple.com/us/app/tru-audio-converter-pro/id577103124?mt=12
1. Extract audio from any video like wmv, avi, mp4, flv, rmvb, mpg etc to the comon audio format, such as mp3, ogag, aac, Apple lossless, aiff, wma, wav.
2. Convert audio from one format to another one.
3. Extract a clip audio from a video or audio file.
4. Auto send the ripped audio files to iTunes library.
OSX 10.7 and later