[gstreamer-bugs] [Bug 556521] New: [PATCH] typefind: improved MPEG4 start code recognition

[GStreamer (bugzilla.gnome.org)]

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  GStreamer | gst-plugins-base | Ver: HEAD CVS
           Summary: [PATCH] typefind: improved MPEG4 start code recognition
           Product: GStreamer
           Version: HEAD CVS
          Platform: Other
        OS/Version: All
            Status: UNCONFIRMED
          Severity: minor
          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


Please describe the problem:
I have a camera that specifies a YUV clamping section in the visual object
header.  However, mpeg4_video_type_find always assumes a 5-byte
visual_object_start_code.  The attached patch allows start codes up to 10 bytes
(the maximum according to http://xhelmboyx.tripod.com/formats/mpeg-layout.txt
).

Note, I'm going to make a more extended patch with more functionality in a
separate bug report.  However, I wanted to submit this already in case the
other patch isn't accepted.

Steps to reproduce:
gst-launch souphttpsrc location=<JVC camera MPEG4 stream> ! typefind ! fakesink

Actual results:
ERROR: from element /pipeline0/typefindelement0: Could not determine type of
stream.


Expected results:
video/mpeg stream recognized

Does this happen every time?
Yes

Other information:


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