[Live-devel] MPEG-4 Streaming presentation rate

Ross Finlayson finlayson at live555.com
Tue May 12 09:21:21 PDT 2009


>Ok - I've now tried with openRTSP creating MPEG-4 ES - no "-4" or "-q".
>Having the same issue.
>
>Turned on debug...  testOnDemandRTSP is calculating presentation times
>that work out to 15 fps, for example:
>#parsing VideoObjectPlane
>vop_coding_type: 1(P), modulo_time_base: 0, vop_time_increment: 133
>MPEGVideoStreamFramer::computePresentationTime(133) -> 98426.157286 [0.240799]
>fDurationInMicroseconds: 67000 ((67*1000000)/1000.000000)
>
>The file should be 30 fps, and plays as such in VLC.

The frame rate of the outgoing stream is set (in this case) at line 
413 of "MPEG4VideoStreamFramer.cpp".  You'll need to examine this 
code to figure out why it's not working properly for your data.
-- 

Ross Finlayson
Live Networks, Inc.
http://www.live555.com/


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