On Friday, February 18, 2022, Andrea paz <gamberucci.andrea@gmail.com> 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!)