[Bug 712198] New: rtptimes in RTP-Infor header not syncronized

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=712198
  GStreamer | gst-rtsp-server | git

           Summary: rtptimes in RTP-Infor header not syncronized
    Classification: Platform
           Product: GStreamer
           Version: git
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-rtsp-server
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: branko.subasic at axis.com
         QAContact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---


The RTSP PLAY-response contains an RTP-Info header, which, among other things,
contains initial rtp timestamps for each media. These timestamps indicate the
"implied start point", and are also used for inter-media synchronization.

To be usable for synchronization they must represent the same point in time.
Unfortunately gst-rtsp-server currently for each media takes the timestamp of
the first buffer to generate the rtptime value in the RTP-Info header for that
media. That means that the rtptime values for the different medias in the
RTP-Info header will NOT represent the same point in time, and thus renders
them useless for syncronization purpose.

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