mp4 dobrze czyta QuickTime
http://www.apple.com/quicktime/products/qt/Opis ze strony:
"Welcome to QuickTime 6.5, featuring 3GPP and 3GPP2, worldwide standards for the creation, delivery, and playback of multimedia over new, high-speed wireless networks. Built on MPEG-4 and powered by QuickTime, 3GPP and 3GPP2 extend the reach of rich multimedia to a new generation of handheld wireless devices. As the first widely distributed, freely available multimedia technology to deliver both 3GPP and 3GPP2 capabilities, QuickTime enables users all over the world to share 3G content with others via both computers and mobile devices. "
i dalej ...
"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. The technologies in QuickTime 6.5 that provide these capabilities are MPEG-4 and H.263 video codecs, AAC (Advanced Audio Coding), AMR (Adaptive Multi-Rate), and QCELP (Qualcomm Code Excited Linear Predictive) audio codecs, a 3G Text importer and exporter, support for Movie Fragments, and a user-friendly 3G export dialog to aid in the creation of 3GPP- and 3GPP2-compliant files."