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[Michi Henning <michi.henning@xxxxxxxxxxxxx>]

As an experiment, I added a separate thread to vs-thumb that runs a
timer. When the timer fires (after 10 seconds), the thread calls
_exit().

When I have one of these stuck vs-thumb processes that is spinning, I
see the timer firing. However, _exit() does not terminate the process
immediately. I'm seeing the same 30-second delay that I get after
SIGKILL.

Note that this doesn't happen all the time. Sometimes, the _exit() call
works (just as sometimes, the SIGKILL works). But, around 20% of the
time, I get this 30-second delay before the process finally exits.

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Touch seeded packages, which is subscribed to gstreamer1.0 in Ubuntu.
https://bugs.launchpad.net/bugs/1466273

Title:
  gstreamer fails intermittently

Status in Thumbnailer:
  New
Status in gstreamer1.0 package in Ubuntu:
  New

Bug description:
  gstreamer occasionally fails to extract a thumbnail from a video file.
  It's clearly a race condition because, almost all of the time, it
  succeeds. To reproduce:

  Check out the thumbnailer/devel branch at r217 and build it. Then:

  cd build/src/vs-thumb

  ./vs-thumb fd://0 ./x.jpg <../../../tests/media/testvideo.ogg

  Point a browser at the generated x.jpg file and check that the image
  was extracted correctly.

  Now run

  while ./vs-thumb fd://0 ./x.jpg <../../../tests/media/testvideo.ogg ;
  do :; done

  Within maybe a hundred iterations or so, I get:

  Error creating thumbnail: ThumbnailExtractor: change_state(): reading
  async messages: GStreamer error: negotiation problem.

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