On Sat, Apr 26, 2025 at 10:09 PM Andrea paz <[email protected]> wrote:
I did two tests with ffmpeg standalone:
1) time -p ffmpeg -hwaccel vaapi -i hdr_02.mp4 -c:a copy -c:v rawvideo -f nut /dev/null
fps=26 speed=0.438x CPU load=5%
2) (no vaapi) time -p ffmpeg -i hdr_02.mp4 -c:a copy -c:v rawvideo -f nut /dev/null
fps=100 speed=1.66x
I loaded the video to CinGG. Playback:
Vaapi X11 --> ~59.7 fps (some freeze at 49 fps) X11 reverse playback --> 9-18 fps (many artefacts)
OpenGL --> ~12 fps (many freezes and artefacts) OpenGL reverse --> 7-9 fps (inusable for freeze and artifacts)
No vaapi X11 --> 59.7 fps (no artefacts) X11 reverse --> 3-9 fps (many freezes and artefacts)
I think I am seeing some artefacts on reverse too, but normal playback was fixed for me by checking "Play every frame" checkbox Can you post mediainfo of input file too?
Rendering (h265.mp4 and hevc_vaapi_8b420.mp4):
h265.mp4 --> 10 fps hevc_vaapi_8b420.mp4 --> 23.7 fps