[gstreamer-bugs] [Bug 578926] New: decodebin/decodebin2 should insert mpeg4videoparse

[GStreamer (bugzilla.gnome.org)]

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  GStreamer | gst-plugins-base | Ver: 0.10.21
           Summary: decodebin/decodebin2 should insert mpeg4videoparse
           Product: GStreamer
           Version: 0.10.21
          Platform: Other
        OS/Version: All
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-plugins-base
        AssignedTo: gstreamer-bugs at lists.sourceforge.net
        ReportedBy: arnout at mind.be
         QAContact: gstreamer-bugs at lists.sourceforge.net
     GNOME version: Unspecified
   GNOME milestone: Unspecified


When I view an MPEG4 stream from a Sony camera with playbin or playbin2 (or
decodebin or decodebin2), the decoded stream is weird.  It looks like only the
top row or so of macroblocks is really decoded, and the rest only has
differential info (probably the I-frames aren't detected).  I get the same
effect with a manually constructed pipeline:

 souphttpsrc location=... ! ffdec_mpeg4 ! autovideosink

Inserting an mpeg4videoparse solves this:

 souphttpsrc location=... ! mpeg4videoparse ! ffdec_mpeg4 ! autovideosink


This is using -base 0.10.21, -bad 0.10.9 and -ffmpeg 0.10.4.


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