[Ffmpeg-devel] [PATCH] x264 avc encoding, movenc avcC, ctts (original) (raw)

Richard S. teetrinker
Sun Feb 19 19:54:24 CET 2006

Erik Slagter schrieb:

Are all of "isom"/"mp42"/"mp41" completely valid mp4 types? If for instance one of them is obsolete, I'd vote for adhering to the current standard (be it "isom" or "mp4.") isom = 14496-12 Shouldn't be used as major brand, but can you create a correct IOD,BIFS and OD? Qoute 14496-12: ...This brand should not be used as the major brand; this base file format should be derived into another specification to be used. There is therefore no defined normal file extension, or mime type assigned to this brand, nor definition of the minor version when ?isom? is the major brand. Files would normally be externally identified (e.g. with a file extension or mime type)

There is somewhere a free copy of 14496-12.

mp42 = 14496-14 (mp41 =some time ago the MP4 File was in 14496-1 defined)

14496-* can be bought here: http://www.iso.ch

Richard

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