Frame dropping when playing ultra-high brightness Dolby Vision P8 content in full-screen mode with "source-dynamic" enabled.

mpv Information

mpv v0.41.0-dev-g41f6a6450 Copyright © 2000-2025 mpv/MPlayer/mplayer2 projects
 built on Dec 21 2025 19:30:47
libplacebo version: v7.358.0
FFmpeg version: f853d12
FFmpeg library versions:
   libavcodec      62.11.100
   libavdevice     62.1.100
   libavfilter     11.4.100
   libavformat     62.3.100
   libavutil       60.8.100
   libswresample   6.1.100
   libswscale      9.1.100

Other Information

- Windows version:Windows11 24h2 26100.4762
- GPU model, driver and version:RTX 2080Ti 591.74
- Source of mpv:
- Latest known working version:null
- Issue started after the following happened:target-colorspace-hint-mode = source-dynamic

Reproduction Steps

Set the conf configuration to the following parameters
vo = gpu-next hwdec = d3d11va target-colorspace-hint = auto target-colorspace-hint-mode = source-dynamic
Then play the sample video in full screen.

Expected Behavior

Play normally and smoothly

Actual Behavior

Lag and frame drops occur after entering full-screen mode.

Log File

mpv.log

Sample Files

https://drive.google.com/file/d/11Op6OPxuP1vE-bpWRpXCHjU4Y4T2-OuI/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 issue with the listed gpu-next, d3d11va, target-colorspace-hint, and source-dynamic settings, using the linked sample and mpv.log. Compare windowed and full-screen playback on the reported Windows and GPU setup. Done means the Dolby Vision P8 sample plays smoothly in full-screen mode without lag or frame drops.