[gstreamer-bugs] [Bug 549774] audio / video synchronization glitch during rtsp playback

[GStreamer (bugzilla.gnome.org)]

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  GStreamer | gst-plugins-base | Ver: 0.10.18




------- Comment #6 from Forest  2008-09-04 01:44 UTC -------
Created an attachment (id=117975)
 --> (http://bugzilla.gnome.org/attachment.cgi?id=117975&action=view)
relevant packets captured before and after the problem showed up

(In reply to comment #5)
> The SR packets from the server tell the client to apply a 800ms offset.

No, I don't believe that's true.  I just did a packet capture from a session
that exhibited the problem, and calculated the NTP wallclock time of an audio
and video RTP packet that arrived within one millisecond of each other.  I used
the most recently received RTCP packets to perform this calculation.  The
wallclock times of both packets came out almost exactly the same.

I am attaching the relevant packets from my packet capture.  I stripped out all
RTP packets except the very first (before the sync problem) and nearly last
(after the sync problem), due to file size and content redistribution concerns.

> What versions are you using of gstreamer, gst-plugins-base. gst-plugins-good,
> gst-plugins-bad?

dpkg says:

gstreamer-tools 0.10.18-4ubuntu1
gstreamer0.10-plugins-bad 0.10.6-5
gstreamer0.10-plugins-base 0.10.18-3
gstreamer0.10-plugins-good 0.10.7-3ubuntu0.1
gstreamer0.10-tools 0.10.18-4ubuntu1
gstreamer0.10-x 0.10.18-3


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