Ce spui tu nu are treaba deloc cu MP4. Deci, cum ziceam (degeaba, cred) mai sus, QUICKTIME by APPLE este solutia, este free si este necesara de multe ori.
"What’s New in QuickTime 6.5?
3GPP and 3GPP2 Support
QuickTime 6.5 now delivers extensive support for both 3GPP and 3GPP2, including video, audio, text, and native .3gp and .3g2 file format support. Because 3GPP and 3GPP2 are now a part of the core architecture of QuickTime, you can import, export, and play back .3gp and .3g2 files just as you do .mp4 and .mov files.
MPEG-4 File Format (.mp4)
Since the QuickTime file format is at the foundation of MPEG-4, QuickTime 6 supports .mp4 files as first-class citizens. So with QuickTime 6, you can author professional-quality, ISO-compliant MPEG-4 audio and video files that can be played back not only by QuickTime 6, but also by any other MPEG-4-compliant player."
Asta ca sa incheiem discutiile despre cine este MP4 si ce vrea el de la noi...