1 Topic by dawkinscm (edited by dawkinscm 27-12-2025 05:10:31)

Topic: Pixelation on PC when using Vulkan context or gpu-api on mpv player

SVP is smoothest when using Vulkan hwdec with Vulkan api or context. But if I use winvk context then pixelation occurs and usually with exactly the same scene changes. If I use Vulkan api then it is less frequent and a quick rewind normally fixes the issue. Might be partially an Nvidia issue because when using Vulkan gpu-api it occurs even less on my integrated AMD card. But when using winvk context it still occurs on both cards. The symptoms also point to a memory leak as closing and restarting helps. I'm not sure if the leak is with mpv or SVP or both.

2 Reply by flowreen91 (edited by flowreen91 28-12-2025 19:08:24)

Re: Pixelation on PC when using Vulkan context or gpu-api on mpv player

gpu-api=vulkan
hwdec=vulkan
gives weird green artifacts when jumping around in the timeline in mpv
https://gyazo.com/7b320461bc117dbf7c3dc4f5234b2773

Try this instead?
hwdec=vulkan-copy

It only has that weird green artifact once starting the video and shows this in console (not sure if relevant)
https://gyazo.com/ae97a333c9a7cd7319dd0e70620aa150
Probably should be reported to mpv guys?

Nevermind someone already mentioned this behaviour:
https://github.com/mpv-player/mpv/issues/17175

3 Reply by dawkinscm (edited by dawkinscm 28-12-2025 10:26:02)

  • Thanks: 255
  • Thanks for the post: 1

Re: Pixelation on PC when using Vulkan context or gpu-api on mpv player

flowreen91 wrote:

gpu-api=vulkan
hwdec=vulkan
gives weird artifacts when jumping around in the timeline in mpv
https://gyazo.com/7b320461bc117dbf7c3dc4f5234b2773

Try this instead?
hwdec=vulkan-copy

It only has that weird artifact once starting the video and shows this in console (not sure if relevant)
https://gyazo.com/ae97a333c9a7cd7319dd0e70620aa150
Probably should be reported to mpv guys?

Nevermind someone already mentioned this behaviour:
https://github.com/mpv-player/mpv/issues/17175

Thanks. I don't get the green screen but I do get the distortion but only on scene changes within SVP and it usually doesn't last long. I found vulkan-copy was worse which is why I switched to just plain Vulkan.

Either way, Vulkan with SVP Pro using "High Quality" Automatic profile and a few tweaked settings  is (for me) as smooth and clear as RIFE v26 Heavy with next to no artifacts. My previous nvof settings were very good, but strange how the basic Automatic profile now works so well. I don't think it's the 50 series card because SVP+Vulkan actually works more better with my iGPU than my Nvidia dGPU.

4 Reply by starks (edited by starks Yesterday 00:37:40)

  • Thanks: 3
  • Thanks for the post: 2

Re: Pixelation on PC when using Vulkan context or gpu-api on mpv player

I've been trying vulkan(copy)+winvk with Intel Xe for a few months. Tends to crash whenever you interact with the player during playback. mpv really doesn't like the shifting back and forth from VRAM to system RAM for the Vapoursynth portion of the pipeline.