[Bug 696244] New: qtdemux subtitles need some fixing

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=696244
  GStreamer | gst-plugins-good | git

           Summary: qtdemux subtitles need some fixing
    Classification: Platform
           Product: GStreamer
           Version: git
        OS/Version: All
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-plugins-good
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: matej.knopp at gmail.com
         QAContact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---


1. qtdemux doesn't recognize SBLT subtype. SBLT is used by handbrake and subler
and is recognized by quicktime player.

2. qtdemux should ignore empty subtitle buffers. Those can be send to end
previous buffer, but gstreamer has duration set on it so another buffer is not
really necessary. Also it doesn't handle empty buffers (len = 2) well which
results in sending garbage as data.

3. qtdemux doesn't send GAP event for subtitle streams.

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