[gstreamer-bugs] [Bug 602508] New: qtdemux: Parse stbl atom per sample instead of all at once

GStreamer (bugzilla.gnome.org) bugzilla at gnome.org
Fri Nov 20 08:04:31 PST 2009

  GStreamer | gst-plugins-good | git

           Summary: qtdemux: Parse stbl atom per sample instead of all at
    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: robert.swain at gmail.com
         QAContact: gstreamer-bugs at lists.sourceforge.net
      GNOME target: ---
     GNOME version: ---

I have been working to make the qtdemux element parse the stbl atom per sample
to improve start-up times when playing mov/mp4/etc.

In master, prior to these changes, the entire atom is parsed during
pre-rolling. My changes make the code parse the 0th sample during pre-rolling
and then any others as required to decode samples. Note that if a seek occurs,
the entire remainder of the atom is parsed.

I have published the changes in the working-qtdemux branch in my personal -good
repository at git://people.freedesktop.org/~robswain/gst-plugins-good

Review and comments are very welcome. The changes have been tested quite a lot,
and while I'm not really aware of any outstanding issues, maybe some still

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