[gstreamer-bugs] [Bug 500825] New: Race condition in flv demux

[GStreamer (bugzilla.gnome.org)]

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  GStreamer | gst-plugins-bad | Ver: HEAD CVS
           Summary: Race condition in flv demux
           Product: GStreamer
           Version: HEAD CVS
          Platform: Other
        OS/Version: Windows
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-plugins-bad
        AssignedTo: gstreamer-bugs at lists.sourceforge.net
        ReportedBy: kwangyul.seo at gmail.com
         QAContact: gstreamer-bugs at lists.sourceforge.net
     GNOME version: Unspecified
   GNOME milestone: Unspecified


I compiled flv demux against gstreamer-0.10.15 and gst-plugins-base-0.10.15. I
see a werid problem when flv demux works in pull mode. By the way, it works
well in push mode.

gst-launch-0.10.exe playbin uri="file:///c:/w.flv"


In gst_flv_demux_loop() function, demux->segment->rate is negative value for
some reasons I don't know. I tried to print the value, but the g_print shows
that the value is 1.0 in else clause of demux->segment->rate >= 0. So the
playback never starts and ends up in reverse playback's EOS condition.

    /* check EOS condition */
    if (demux->segment->last_stop <= demux->segment->start) {
      /* <<<ALWAYS STOPS HERE>>> */
      ret = GST_FLOW_UNEXPECTED;
      goto pause;
    }

More interestingly, when I convert demux->segment->rate to gint, it works
correctly and playback the flash video.

if ((gint) demux->segment->rate >= 0) {
...
}
else {
...
}

Is this a race condition?


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