[Bug 693263] New: Typefind element has an issue with Mpeg2 video elementary stream

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=693263
  GStreamer | gst-plugins-base | 1.0.4

           Summary: Typefind element has an issue with Mpeg2 video
                    elementary stream
    Classification: Platform
           Product: GStreamer
           Version: 1.0.4
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: major
          Priority: Normal
         Component: gst-plugins-base
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: jagadishkamathk at gmail.com
         QAContact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---


When I try to decode an mpeg interlaced elementary stream with the following
pipeline 

gst-launch-1.0 -v filesrc location=/mnt/hgfs/d/test/libav/carrace.m2v !
decodebin ! filesink location=/mnt/hgfs/d/test/libav/carrace.yuv 

I get following error
/GstPipeline:pipeline0/GstDecodeBin:decodebin0/GstTypeFindElement:typefind.GstPad:src:
caps = video/x-h263 
Missing element: H.263 decoder

Not sure why typefind is finding this as an H263 stream 

Interestingly, the following pipeline works perfectly 

gst-launch-1.0 -v filesrc location=/mnt/hgfs/d/test/libav/carrace.m2v !
mpegvideoparse ! avdec_mpeg2video ! filesink
location=/mnt/hgfs/d/test/libav/carrace.yuv 

SO in short, mpeg2 elementary streams are detected as H263 streams

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