[Bug 648932] New: mpegvideoparse: Avoid double scanning of pictures

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=648932
  GStreamer | gst-plugins-good | unspecified

           Summary: mpegvideoparse: Avoid double scanning of pictures
    Classification: Platform
           Product: GStreamer
           Version: unspecified
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: gst-plugins-good
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: bilboed at gmail.com
         QAContact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---


mpegvideoparse is scanning for all start codes twice. Once when buffers are
added to the packetizer and once again when parsing for picture data.

When handling picture data, we only need to find the MPEG_PACKET_PICTURE data
to scan the header (and not all the remaining picture start codes that we
will be discarding).

Makes mpegvideoparse two times faster on HD content

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