[Mp4-tech] About H263 in Mp4 file format

Dave Singer singer apple.com
Wed Jan 17 11:59:20 ESTEDT 2007


At 11:30  +0000 17/01/07, Dave Singer wrote:
>At 11:36  +0800 17/01/07, changfeng niu wrote:
>>Hi everyone
>>Do anyone know the definition of H263 in mp4 file format or some 
>>document including these definition?
>>thank you very much  in advance.
>>Nathan.niu
>>
>>______________
>
>Defined in 3GPP 26.244, the 3GPP file format, available free from 
>www.3gpp.org.
>
>(Technically there is a 'short header' mode of MPEG-4 part 2 which 
>is technically identical to H.263, but no-one uses it).

I should have said "no-one (as far as I know) uses MP4 files with 
MPEG-4 video code-points but using short header MPEG-4 video as a way 
of exchanging H.263 video".  I didn't mean to imply that no-one 
worldwide uses mpeg-4 short headers (I do not have universal 
knowledge, of course).
-- 
David Singer
Apple Computer/QuickTime


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