[Bug 660421] New: [queue2] blocked pipeline when using tee and mpeg2enc on size 520x416

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=660421
  GStreamer | gstreamer (core) | git

           Summary: [queue2] blocked pipeline when using tee and mpeg2enc
                    on size 520x416
    Classification: Platform
           Product: GStreamer
           Version: git
        OS/Version: All
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gstreamer (core)
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: julien.isorce at gmail.com
         QAContact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---


* steps to reproduce :

gst-launch-0.10 videotestsrc ! "video/x-raw-yuv, width=520, height=416" ! \
tee name=t ! queue ! mpeg2enc ! fakesink t. ! queue2 ! xvimagesink

 * actual result :

pipeline is blocked in PREROLL step so playing state is not reached.

 * more infos:

With an other (ex: height=520) it's ok. Or when using queue instead of queue2
then it's ok (that's why I think the problem comes from queue2).

I do not if this is a really a deadlock because we can still close the window
of xvimagesink to turn off the pipeline.

The last 3 lines printed by using GST_DEBUG=mpeg2enc:5 are:

0:00:00.177778815 20368 0xb5b00ac8 LOG                 mpeg2enc
gstmpeg2encpicturereader.cc:122:LoadFrame:<mpeg2enc0> locking tlock from thread
0xb5b00ac8
0:00:00.177804225 20368 0xb5b00ac8 LOG                 mpeg2enc
gstmpeg2encpicturereader.cc:122:LoadFrame:<mpeg2enc0> locked tlock from thread
0xb5b00ac8
0:00:00.177823176 20368 0xb5b00ac8 LOG                 mpeg2enc
gstmpeg2encpicturereader.cc:131:LoadFrame:<mpeg2enc0> thread 0xb5b00ac8 waiting

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