[gstreamer-bugs] [Bug 593354] New: rtpjitterbuffer sometimes outputs packets with timestamps in the past

[GStreamer (bugzilla.gnome.org)]

http://bugzilla.gnome.org/show_bug.cgi?id=593354

           Summary: rtpjitterbuffer sometimes outputs packets with
                    timestamps in the past
    Classification: Desktop
           Product: GStreamer
           Version: git
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-plugins-good
        AssignedTo: gstreamer-bugs at lists.sourceforge.net
        ReportedBy: tester at tester.ca
         QAContact: gstreamer-bugs at lists.sourceforge.net
      GNOME target: ---
     GNOME version: ---


--- Comment #0 from Olivier Crete (Tester) <tester at tester.ca> 2009-08-28 03:09:11 UTC ---
Created an attachment (id=141909)
Test program

Under the right conditions, the jitterbuffer can output packets that have
timestamps in the past. I guess the solution is to reset the jb's state if that
happens. I'm not sure how to properly do that without having to query the clock
on every buffer. Attaching a patch that tries to do that.. but there must be a
smarter solution.

One case I can see is if the skew ends up being so much that its more than the
length of the jb. It also happens if for some reason the rtp and gst timestamps
get desynchronized (like if the other sides does a "hold" in a voip call and
just stops its clock entirely while on hold).

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