Most (maybe all) HDR playback fails using gpu or gpu-next, works robustly using libmpv

mpv Information

mpv v0.41.0 Copyright © 2000-2025 mpv/MPlayer/mplayer2 projects
libplacebo version: v7.360.1
FFmpeg version: 9.0.1
FFmpeg library versions:
   libavcodec      63.1.101
   libavdevice     63.1.101
   libavfilter     12.1.101
   libavformat     63.1.101
   libavutil       61.1.101
   libswresample   7.1.101
   libswscale      10.1.101

Other Information

- macOS version: 15.7.3
- Source of mpv: homebrew
- Latest known working version: 0.40 perhaps
- Issue started after the following happened: I am not sure

Reproduction Steps

1. Fresh mpv CLI install from homebrew
2. start HDR video playback (dv, bt.2020, pq) with --no-config, which seems to default to gpu or gpu-next
3. Classic washed out failed HDR playback
4. with vo=libmpv and no other config, HDR plays normally. With a range of other config (currently --cocoa-cb-output-csp=display-p3-pq, --target-trc=pq, --target-prim=display-p3), still works normally. Nothing works at all with gpu or gpu-next, and many flags seems to have no effect.

Expected Behavior

HDR stream should at least activate with basic default parameters using gpu or gpu-next

Actual Behavior

HDR stream fails using gpu or gpu-next

Log File

output.txt

Sample Files

https://drive.google.com/file/d/1Xw7Aug5nx3r_hHEFVypTyQ-cD0Anu7cU/view?usp=sharing

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

• I tested and confirmed that the issue exists with the latest release version or newer.
• 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.

Start by reproducing the HDR sample with the attached output.txt conditions: macOS 15.7.3, mpv v0.41.0, --no-config, and gpu or gpu-next. Compare the behavior and logs with vo=libmpv and the listed HDR options; done means HDR playback works with basic gpu or gpu-next defaults rather than appearing washed out.