[Bug 681605] New: Playback quality degrades over time when playing a MPEG TS live stream (UDP)

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=681605
  GStreamer | gst-plugins-bad | git

           Summary: Playback quality degrades over time when playing a
                    MPEG TS live stream (UDP)
    Classification: Platform
           Product: GStreamer
           Version: git
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-plugins-bad
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: tvrtko.ursulin at onelan.co.uk
         QAContact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---


This seems to be repeatable and with roughly the same pattern so it's quite
interesting. Could be the new TS demuxer at fault.

I was playing a BBC THREE DVB-T stream (so MPEG-2 video and mp2 audio) from the
network (UDP, localhost unicast). Playback initially starts OK with some QOS
messages (dropped frames) from various elements for a few seconds right after
startup (it was like this even with the old TS demuxer) but then it completely
fine for approx. 26 minutes.

At 26-27 minute mark since start of playback a single QOS message appears with
xvimagesink dropping a frame.

Then between 35-37 minute mark we get more dropped frames every couple of
seconds, or a couple of times per seconds, in clusters with some clean time in
between.

Then between 40-45 minute mark dropped frames become frequent and constant.
Something like one to three times per seconds, almost on every second.

Component versions in use are roughly:
gstreamer-0.10.36.1-git120808.955693fc36ac38dc604e1e616e1c441cc3c25e1c
-ffmpeg-0.10.13.1-git120808.1db8779252afa264996e59c18430f70cc5582b28
-base-0.10.36.1-git120808.12ef907f8a3762685da0b96391edc30a78d31805
-bad-0.10.23.1-git120808.e3b09c25b16c42ca7a83472c61054f34a31f572c
-ugly-0.10.19.1-git120808.afeffcdb44135c04c5767bba8b10fab82ec9a9df
-good-0.10.31.1-git120808.c1f1b62ca26106fba30fca65b0945c31da0ffe22

-- 
Configure bugmail: https://bugzilla.gnome.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the QA contact for the bug.
You are the assignee for the bug.