[Bug 733072] New: camerabin: Taking a picture in cheese leads to all sort of race

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=733072
  GStreamer | gst-plugins-bad | git

           Summary: camerabin: Taking a picture in cheese leads to all
                    sort of race
    Classification: Platform
           Product: GStreamer
           Version: git
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-plugins-bad
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: nicolas.dufresne at collabora.co.uk
         QAContact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---


I have got 3 different race so far when trying to take a picture.

One it works but there is warning about oustanding buffers in v4l2 pool on
stop. This should never happens in the ready->null state transition.

Second it fails, EBUSY, the v4l2 pool never got freed.

Third it deadlock, see attached backtrace.

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