[Bug 762509] H.264 decoder stores too many pictures in the DPB before output

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=762509

Stanislav <stanislav at rkt.name> changed:

           What    |Removed                     |Added
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                 CC|                            |stanislav at rkt.name

--- Comment #7 from Stanislav <stanislav at rkt.name> ---
I have found 1 more important bug - when used vaapih264enc and then vaapidecode
in same pipeline - image is sluttering every few seconds - checked on 2
different intel CPU's (i7 and recent i5) - BUT patch from this thread fixes it,
and also it reduces decoder latency by about 50%.
example pipeline:

gst-launch-1.0 decklinkvideosrc mode=11 connection=2 ! deinterlace mode=1
method=4 fields=2 ! videoconvert ! vaapipostproc format=23 ! vaapih265enc
rate-control=cqp !
video/x-h265,width=1920,height=1080,framerate=25/1,stream-format=byte-stream !
h264parse ! vaapidecodebin ! vaapisink sync=false

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