On Friday, February 18, 2022, Andrea paz <[email protected]>
wrote:

> My test.
> Compiling from git: OK.
> Create new project 1080p/25fps/RGBS-Float: OK. Checked "Play every
> frame" and Driver=X11-OpenGL.




i think right now x11 (all versions) output must convert from rgba-float to
rgba8, and vaapi also outputs at best 10-12 bit integer format, so
conversion to project's format also necessary...

>
> With hardware acceleration on "none":
> Playback forward: OK
> Playback reverse: ~OK
> Manual scrub: ~OK
> Rendering (37s): 18 fps (single thread!)


did you tried various vp9 presets?


> With hardware acceleration on "vaapi":
> Playback forward: OK
> Playback reverse: BAD
> Manual scrub: BAD
> Rendering (37s): 18 fps (single thread!)
>
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