Using vulkan/winvk in a Windows HDR environment, skipping from SDR to HDR file or vice versa messes up the colours

[ixxbxxx]

Important Information

Provide following Information:

• mpv version all versions since at least 2023 including latest 0.37 nightly
• Windows Version Windows 11
• Source of the mpv binary shinchiro
• If known which version of mpv introduced the problem tested all the way back to 2023 binaries
• GPU model, driver and version issue persist through various driver versions
• Possible screenshot or video of visual glitches

If you're not using git master or the latest release, update.
Releases are listed here: https://github.com/mpv-player/mpv/releases

Reproduction steps

using a HDR monitor, windows in HDR mode, autoload.lua and the following config:

no-config
vo=gpu-next
target-colorspace-hint=yes
gpu-api=vulkan
gpu-context=winvk

However, when using the following config instead, the issue is resolved:

no-config
vo=gpu-next
target-colorspace-hint=yes
gpu-api=d3d11
gpu-context=d3d11

Expected behavior

When skipping from a SDR file to a HDR file or vice versa, the colour is correct.

Actual behavior

When skipping from a SDR file to a HDR file or vice versa, the colour is incorrect. Skipping from SDR to SDR or HDR to HDR appears fine.

Log file

N/A

Sample files

any HDR + SDR file in the same directory and skipping via autoload.lua

[laodaoxp]

[SDR2HDR]
profile-desc=SDR 反向映射 HDR 参数
inverse-tone-mapping=yes

[HDR2SDR]
profile-desc=HDR-SDR 映射参数
tone-mapping=auto
#tone-mapping-param=1.0
#tone-mapping-max-boost=1.0
gamut-mapping-mode=auto
hdr-contrast-recovery=0.30
#hdr-contrast-smoothness=3.5
hdr-compute-peak=auto
hdr-peak-percentile=99.995
hdr-peak-decay-rate=20
hdr-scene-threshold-low=1.0
hdr-scene-threshold-high=3.0
allow-delayed-peak-detect=no

Set it up like this and take a look

[ixxbxxx]

@laodaoxp I am not sure what this achieves - do you mean that I should also create conditional profiles depending on the underlying file type?

[ixxbxxx]

@kasper93 are you sure this issue is with libplacebo since this appears to be a vulkan specific issue (issue is not that with d3d11 api/context.