[Mp4-tech] H264 RTP Timestamp

[Dave Singer]

At 15:51  -0700 20/10/06, Jerry Johns wrote:
>Hello,
>           I'm currently in the process of writing a H264 packetizer, 
>and I'm encountering some difficulty composing the RTP timestamps; 
>in the H264 sample vids I've had, there have been samples which
>Had SEI messages, indicating a picture_timing msg which means I can 
>extract the timing info (is the timing a PTS? Where does the 
>reference 90khz come from?) - I've also had samples which don't have 
>an SEI, (just parameter sets and slices), in which case, how do I 
>compose the 32-bit timestamp?

The system that the stream is in is probably carrying the timing in 
that case (e.g. the mp4 file format).
>
>Thank you
>
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-- 
David Singer
Apple Computer/QuickTime
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