[Bug 795325] gstreamer-vaapi stutters heavily when rendering (some videos) to GLX

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=795325

--- Comment #2 from Daniel van Vugt <daniel.van.vugt at canonical.com> ---
clutterautovideosink is not smooth either (about half frame rate), but also not
as bad as glimagesink. clutterautovideosink doesn't trigger warnings like
glimagesink does:

WARNING: from element
/GstPipeline:pipeline0/GstGLImageSinkBin:glimagesinkbin0/GstGLImageSink:sink: A
lot of buffers are being dropped.
Additional debug info:
gstbasesink.c(2902): gst_base_sink_is_too_late ():
/GstPipeline:pipeline0/GstGLImageSinkBin:glimagesinkbin0/GstGLImageSink:sink:
There may be a timestamping problem, or this computer is too slow.
WARNING: from element
...

xvimagesink appears to stutter too. The only one that works smoothly is
ximagesink(!).

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