BC:=Baptiste Coudurier [snip] BC> > BC> > BC> > BC> > I am afraid but a bit of hystory lesson is required BC> > BC> > BC> > BC> > the QuickTime file format came first, in the late 90's the ISO MPEG-4 BC> > BC> > group wanted to adopt a file format for MPEG 4... luckily the final choice BC> > BC> > was to adopt a derivative of Apple QT file format and not Microsoft ASF BC> > BC> > file format. BC> > BC> > BC> > BC> > if you still don't believe me check: BC> > BC> > http://en.wikipedia.org/wiki/QuickTime BC> > BC> BC> > BC> yes, that made ISO Media (14496-12), then after generic container BC> > BC> specifications came MP4 (14496-14) and 3GP BC> > BC> > I think I'm failing to make sure you understand that QuickTime file BC> > format is *not* the MP4 nor 3GP nor MJPEG2000 although deceptively BC> > close. BC> BC> I think you fail to understand that Quicktime file format use many BC> specifications from MP4/3GP (see amr/mp4a/mp4v/h264 atoms) and what about if it was the other way around for the *overwhelming majority* of the atoms? best regards andrea -- Andrea Barbieri Moving Image Research http://www.movingimageresearch.com/ The Workshop, Hampton Lane, Bristol, BS6 6LE, UK Tel: +44 117 9732200 FAX: +44 117 9732210 PGP ID=0x034DFD5A KeyFingerprint=C168EA9A7189538D214F1281A7529F32034DFD5A