ICC profile uses display peak while playing SDR content on HDR display

[Norgerman]

mpv Information

mpv a283f66 Copyright © 2000-2024 mpv/MPlayer/mplayer2 projects
 built on Nov 28 2024 16:48:18
libplacebo version: v7.350.0
FFmpeg version: 6be17a1
FFmpeg library versions:
   libavcodec      61.19.100
   libavdevice     61.3.100
   libavfilter     10.4.100
   libavformat     61.7.100
   libavutil       59.39.100
   libswresample   5.3.100
   libswscale      8.3.100

Other Information

- Windows version: 23H2
- GPU model, driver and version: RTX3080, 566.14
- Source of mpv: https://github.com/shinchiro/mpv-winbuild-cmake/releases
- Latest known working version: https://github.com/shinchiro/mpv-winbuild-cmake/releases/tag/20241123
- Issue started after the following happened:
   1. enable windows HDR
   2. enable ICC profile
   3. playing SDR content

Display infomation:

Reproduction Steps

1. enable windows HDR
2. enable ICC profile
3. playing SDR content
4. if set target-peak to 203 will playing as expected. It seems using peak(1405) from windows.

simple mpv.config, icc file and sample video attached

Expected Behavior

set target-peak=203 in mpv.conf.

Actual Behavior

Log File

mpv.log

Sample Files

sample.zip

I carefully read all instruction and confirm that I did the following:

• I tested with the latest mpv version to validate that the issue is not already fixed.
• I provided all required information including system and mpv version.
• 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.
• I produced the log file while the behaviors described in "Actual Behavior" were actively observed.
• I attached the full, untruncated log file.
• I attached the backtrace in the case of a crash.

[kasper93]

Recently we added display nits retrieval for target-peak, so it now uses true display peak instead. Though for SDR video this has this effect as above.

You can try inverse-tone-mapping if you want to output HDR. Or use target-peak=203 for SDR media. I will think how we can handle it best in default config.

Related: #8249

[Norgerman]

Thanks.