[FFmpeg-devel] Problem with H.263+/RTP payload

William Ahern william
Sun Jul 15 23:29:20 CEST 2007

On Sun, Jul 15, 2007 at 02:10:55PM +0200, Michael Niedermayer wrote:
> also this was disscussed at leas 500 times on this list already, everyone
> has problems with removing the rtp trash not only with h263 but other
> rtp bastardizations of codecs too, people think the payload of h263-rtp
> would be valid h263, no, it is NOT you at least have to merge the bits of
> the first and last bytes, maybe more, i dunno

There are two profiles for this. One is bit-aligned, the other
octet-aligned. I can strip RTP H.263 packets just fine without re-alignment,
when composing H.263 streams from 3GP RTP packets. But, I haven't a clue how
or when spec writers choose one or the other profile.

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