[Live-devel] RTP/RTCP startup behaviuor

Marian Durkovic md at bts.sk
Tue Nov 29 13:42:00 PST 2005


> >   What is the solution to this problem?

> See <http://lists.live555.com/pipermail/live-devel/2005-October/003340.html>


Ross,

  I'm fully aware of this interaction. But the problem is, that change from
"guessed" PresentationTime to synchronized PresentationTime happens at
different time for each elementary stream, which means during e.g. 5 seconds
the user has audio but not video or vice versa. Only when RTCP SRs
for ALL elementary streams are received, the correct playback resumes.

The player can't do anything, if it sees PTS for audio being "guessed" 
and 30 seconds away from synchronized PTS for video.

So again - if things should work correctly, the liveMedia library needs to
change from "guessed" PresentationTime to synchronized PresentationTime
for ALL elementary streams at exactly the same time (only after the first 
RTCP SRs for all ESs have been received).


	With kind regards,

		M.

--------------------------------------------------------------------------
----                                                                  ----
----   Marian Durkovic                       network  manager         ----
----                                                                  ----
----   Slovak Technical University           Tel: +421 2 524 51 301   ----
----   Computer Centre, Nam. Slobody 17      Fax: +421 2 524 94 351   ----
----   812 43 Bratislava, Slovak Republic    E-mail/sip: md at bts.sk    ----
----                                                                  ----
--------------------------------------------------------------------------


More information about the live-devel mailing list