[Bug 98005] VCE dual instance encoding inconsistent since st/va: enable dual instances encode by sync surface

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=98005

--- Comment #37 from Andy Furniss <adf.lists at gmail.com> ---
I see the patches are in now - Which I think is OK as they do AFAICT fix normal
use cases.

Maybe in future the algorithm for increasing gop could take into account bits
per picture as reducing gop size when this is very high could be a workaround.

There is still the question of why single instance avoids this, the commit
message reads like the rate control system in general needs this and doesn't
say it's just a dual instance requirement.

Though gstreamer is buggy above 100M ffmpeg isn't and 240M is a legal rate for
level 5.2 baseline, and now is hard to reach with dual instance without going
for abnormally low gop.

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