[gstreamer-bugs] [Bug 542758] New: [playbin2] Hangs in PLAYING forever if caps are not a subset of pad template caps

[GStreamer (bugzilla.gnome.org)]

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  GStreamer | gst-plugins-base | Ver: HEAD CVS
           Summary: [playbin2] Hangs in PLAYING forever if caps are not a
                    subset of pad template caps
           Product: GStreamer
           Version: HEAD CVS
          Platform: Other
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: critical
          Priority: Normal
         Component: gst-plugins-base
        AssignedTo: gstreamer-bugs at lists.sourceforge.net
        ReportedBy: slomo at circular-chaos.org
         QAContact: gstreamer-bugs at lists.sourceforge.net
     GNOME version: Unspecified
   GNOME milestone: Unspecified


Hi,
playbin2 currently has some problems with the file from bug #542646 too. If the
check in gstmpeg2dec.c:631 is removed there will be caps that are not a subset
of the pad template caps:

$ gst-launch-0.10 -v playbin2 uri=file://`pwd`/ffplay.m2v
Setting pipeline to PAUSED ...
/playbin20/uridecodebin0: source = (GstFileSrc) source
/playbin20/uridecodebin0/decodebin20/typefind.src: caps = video/mpeg,
systemstream=(boolean)false, mpegversion=(int)1
/playbin20/uridecodebin0/decodebin20/mpeg2dec0.sink: caps = video/mpeg,
systemstream=(boolean)false, mpegversion=(int)1
/playbin20/uridecodebin0/decodebin20/mpeg2dec0.src: caps = video/x-raw-yuv,
format=(fourcc)I420, width=(int)704, height=(int)4580,
pixel-aspect-ratio=(fraction)1145/132, framerate=(fraction)30000/1001
0:00:00.549227105 15019  0x918e3e0 ERROR             GST_CAPS
gstpad.c:1998:gst_pad_get_caps_unlocked:<mpeg2dec0:src> pad returned caps
video/x-raw-yuv, format=(fourcc)I420, width=(int)704, height=(int)4580,
pixel-aspect-ratio=(fraction)1145/132, framerate=(fraction)30000/1001 which are
not a real subset of its template caps video/x-raw-yuv, format=(fourcc){ YV12,
I420, Y42B }, width=(int)[ 16, 4096 ], height=(int)[ 16, 4096 ],
framerate=(fraction)[ 0/1, 2147483647/1 ]

(gst-launch-0.10:15019): GStreamer-WARNING **: pad mpeg2dec0:src returned caps
which are not a real subset of its template caps
Pipeline is PREROLLED ...
0:00:00.550094885 15019  0x918e3e0 ERROR             playbin2
gstplaybin2.c:1795:perform_eos:<playbin20> failed to send EOS
Setting pipeline to PLAYING ...
New clock: GstSystemClock




And this forever. Changing the template caps to have width/hight in [16,MAX]
will let playbin2 properly error out, same as with the check in line 631
enabled (i.e. what is in CVS).


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