[Bug 761014] File can't be played with hardware acceleration in Android gstreamer tutorial 5

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=761014

--- Comment #44 from Nicolas Dufresne (stormer) <nicolas.dufresne at collabora.co.uk> ---
With a slow GPU here I get the same, it's jerky with glimagesink, but fine with
xvimagesink. It looks like a regression to me. I fixed this kind of issue in
glimagesink (before the split glupload was added) by making sure every uploaded
buffer get displayed (prevent drop between prepare() and show_frame()).
Otherwise, if the time it takes to upload a frame is larger then the duration
of this frame, we would endup with 1 frame per second on screen. Though, moving
on with a split glupload, we'll get the same behaviour again. If glupload takes
more time then the duration of 1 frame, and the input is live, frames get
dropped in the sink before prepare(). For playback case, QoS mechanism should
be able to fix that, though for live, QoS will have no impact unless you
increase the latency.

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