This application will allow you to convert your MP4 videos to other formats, including audio files.AUAU MP4 Converter is a powerful MP4 conversion tool that can convert MP4 to various video formats.
It can convert MP4 to AVI, MP4 to WMV, MP4 to 3GP, and supports almost all popular video files including AVI, WMV, DVD, VCD, SVCD, 3GP, iPod, iPhone, Zune, Xbox, PSP, Apple TV, PMP, FLV, MOV, etc.