[Live-devel] RTP timestamp issue after RTCP synchronization

[Ross Finlayson]

> I’m pretty sure changing the clock isn’t the solution but maybe it can give a clue on where the issue lies. 

Don't worry; I know where the issue lies (it's a bug/deficiency in the LIVE555 RTSP proxying code; see below).


> After investigating this second point, I found an issue with my timestamps.  My camera’s date is somewhere in 2003 making synchronized timestamps way back in the past.  If I correct the camera’s date and time it fixes the issue I observed making my module and the proxy server working.  This raises a new question: Is it possible to overcome the case where the sender has an incorrect date and time?

Note that the sender's date and time are not really 'incorrect'.  It's perfectly OK for them to be way in the past - or way in the future - as long as the audio and video timestamps are synchronized between themselves.  However, there is a bug in our RTSP proxying code that prevents our proxy server from *sending* correct RTP timestamps (and correct RTCP "SR" packets) in this case.


> For now I can fix the camera’s date and time but I can’t take this for granted when the system will be released.

Yes - I'll need to fix the bug in the LIVE555 code.  Stay tuned...

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

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