[gstreamer-bugs] [Bug 498715] New: GStreamer fails to decode MPEG1 Video RTP streams when gst-ffmpeg is installed

[GStreamer (bugzilla.gnome.org)]

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  GStreamer | gst-ffmpeg | Ver: 0.10.2
           Summary: GStreamer fails to decode MPEG1 Video RTP streams when
                    gst-ffmpeg is installed
           Product: GStreamer
           Version: 0.10.2
          Platform: Other
        OS/Version: All
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-ffmpeg
        AssignedTo: gstreamer-bugs at lists.sourceforge.net
        ReportedBy: dario.gallucci at gmail.com
         QAContact: gstreamer-bugs at lists.sourceforge.net
     GNOME version: Unspecified
   GNOME milestone: Unspecified


Please describe the problem:
If gst-ffmpeg is installed any gstreamer based player (eg. kmplayer with gst
engine or totem) fails to decode mpeg1 video rtp streams from an rtsp session.

Totem fails with this error: Internal GStreamer error: negotiation problem.
On the console the following message can be read:
gstffmpegdec.c(1981): gst_ffmpegdec_chain (): /play/decodebin1/ffdec_mpeg40:
ffdec_mpeg4: input format was not set before data start

If gst-ffmpeg is not installed, it works correctly.

Steps to reproduce:
1. Install gst-ffmpeg
2. Try to play rtsp://live.polito.it/test/tc_mpeg1.mpg
3. Fails
4. Uninstall gst-ffmpeg
5. Try to play rtsp://live.polito.it/test/tc_mpeg1.mpg
6. Works


Actual results:


Expected results:


Does this happen every time?
Yes.

Other information:
I suppose it depends on the fact "video/mpeg" is mapped to MPEG1, MPEG2 and
MPEG4 in ./ext/ffmpeg/gstffmpegcodecmap.c, but it should be mapped to MPEG1 and
2 only.


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