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Youtube VP9 live stream vod artifacts with hwdec=vulkan on windows & nvidia
mpv Information
mpv v0.40.0-301-g77dee9be2 Copyright © 2000-2025 mpv/MPlayer/mplayer2 projects
built on Sep 7 2025 17:01:57
libplacebo version: v7.354.0 (v7.351.0-67-g515da95-dirty)
FFmpeg version: N-121009-g45db6945e
FFmpeg library versions:
libavcodec 62.15.100
libavdevice 62.2.100
libavfilter 11.8.100
libavformat 62.5.100
libavutil 60.12.100
libswresample 6.2.100
libswscale 9.3.100
Other Information
- Windows version: Windows 11 LTSC 24H2
- GPU model, driver and version: Nvidia 3060 driver 581.15
- Source of mpv: latest git build by zhongfly
- Latest known working version: ???
- Issue started after the following happened:
Reproduction Steps
On nvidia gpus under windows any vp9 vod of a Youtube live stream exhibits artifacts, while using hwdec=vulkan this is config that i first experienced the issue with. This does not happen on my 7950x's igpu (RDNA2)
vo=gpu-next
hwdec=auto
gpu-api=vulkan
but it seems to happen with any config that supports hwdec=vulkan, including on vo=gpu. the problem is resolved by setting hwdec=nvdec,auto
Expected Behavior
No corruption while using hwdec=vulkan
Actual Behavior
video corruption
Log File
Sample Files
https://www.youtube.com/live/CcBNYw8pjs8
any of the vp9 formats (315|308|303...) exhibit this issue
I carefully read all instruction and confirm that I did the following:
- [x] I tested with the latest mpv version to validate that the issue is not already fixed.
- [x] I provided all required information including system and mpv version.
- [x] I produced the log file with the exact same set of files, parameters, and conditions used in "Reproduction Steps", with the addition of
--log-file=output.txt. - [x] I produced the log file while the behaviors described in "Actual Behavior" were actively observed.
- [x] I attached the full, untruncated log file.
- [x] I attached the backtrace in the case of a crash.
