mpv Information

mpv v0.40.0-443-gbbafb7488 Copyright © 2000-2025 mpv/MPlayer/mplayer2 projects
 built on Nov  7 2025 02:13:28
libplacebo version: v7.357.0 (v7.351.0-89-g06992a5-dirty)
FFmpeg version: N-121682-g7435a3180
FFmpeg library versions:
   libavcodec      62.19.100
   libavdevice     62.2.100
   libavfilter     11.9.100
   libavformat     62.6.101
   libavutil       60.17.100
   libswresample   6.2.100
   libswscale      9.3.100

Other Information

- Windows version: 10.0.26200.6901
- GPU model, driver and version: AMD latest
- Source of mpv: zhongfly
- Latest known working version: None
- Issue started after the following happened: -

Reproduction Steps

--background=color --background-color=<any near-black or grey color>

Use in combination with either one of the following:

--treat-srgb-as-power22=auto

or

--target-colorspace-hint-strict=no --target-trc=gamma2.2

Expected Behavior

Inputted RGB values for --background-color are not converted to G22 values.

Actual Behavior

Inputted values do not match the outputted values due to gamma conversion.

There could be a new renderer toggle called --blend-background=<yes|no> (default: no) that allows users to choose whether or not they want the background to be affected by color adjustment.

Log File

output.txt

Sample Files

No response

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.