nvidia-true-hdr should not take effect in SDR display or HDR source

[dyphire]

mpv Information

mpv v0.41.0-538-gf5939d0b9 Copyright © 2000-2026 mpv/MPlayer/mplayer2 projects
 built on Apr 22 2026 12:08:56
libplacebo version: v7.362.0 (v7.360.0-16-g409c9a8-dirty)
FFmpeg version: N-124079-g117807510
FFmpeg library versions:
   libavcodec      62.30.100
   libavdevice     62.4.100
   libavfilter     11.17.100
   libavformat     62.13.102
   libavutil       60.30.100
   libswresample   6.4.100
   libswscale      9.7.100

Other Information

- Windows version: Windows 11 25H2
- Source of mpv: git master
- Latest known working version: n/a
- Issue started after the following happened: n/a

Reproduction Steps

1. Turn on the RTX Video HDR switch in the Nvidia graphics card driver
2. Turn off Windows HDR to put the monitor in SDR mode
3. Use the mpv --no-config --vf=@rtx-hdr:d3d11vpp=nvidia-true-hdr command to play SDR video

Expected Behavior

mpv should behave like mpcvr, and the nvidia-true-hdr functionality will not take effect in SDR display.

Actual Behavior

The nvidia-true-hdr video filter will also take effect in SDR display, resulting in incorrect screen display.

Log File

mpv.log

Sample Files

No response

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.

[kasper93]

Use conditional profile. I don't know what nvidia-true-hdr do or doesn't do when you request SDR output. You can report it to NVIDIA to disable the filter on SDR too.

[dyphire]

Use conditional profile.

Yes I know this works, but it would be more correct not to make nvidia-true-hdr take effect when the SDR display or source is HDR does to produce an error screen.
Just like the mpcvr code I linked above:
https://github.com/Aleksoid1978/VideoRenderer/blob/71a4575a8d817b3f83a3d6b626763367e6eb997e/Source/DX11VideoProcessor.cpp#L1989-L1990

[kasper93]

I don't agree, filter is filter. If you enable filter and this filter is broken on some output, it's filter issue. NVIDIA could very easily disable filter in not supported configurations.

[dyphire]

I don't agree, filter is filter. If you enable filter and this filter is broken on some output, it's filter issue. NVIDIA could very easily disable filter in not supported configurations.

Not sure about this, because NVIDIA's RTX Video HDR is not activated and applied in SDR display. The problem is the internal conversion of mpv.
The fundamental problem lies in the judgment logic of enable_nvidia_true_hdr, which was passed incorrectly on the SDR display, causing mpv to perform subsequent internal conversions.

In HDR display mode, RTX Video HDR is activated and applied normally:

In SDR display mode, RTX Video HDR is actually disabled. An internal processing error in mpv caused an abnormal picture:

Also when the source is HDR and in HDR display mode, RTX Video HDR is not activated. but also internal processing error in mpv caused an abnormal picture:

So in fact, NVIDIA's RTX Video HDR can intelligently handle the working status when the source is HDR or is SDR display mode. The problem lies within mpv.

https://github.com/Aleksoid1978/VideoRenderer/blob/71a4575a8d817b3f83a3d6b626763367e6eb997e/Source/DX11VideoProcessor.cpp#L1989-L1990

MpcVR's code behaves normally.

[dyphire]

This issue can indeed be avoided by the following conditional profile. But this only masks the output_format handling error inside the mpv.

[RTX-HDR]
profile-cond=get("video-params/gamma") == "bt.1886" and get("video-target-params/max-luma") > 203 and p.current_vo == "gpu-next"
profile-restore=copy
inverse-tone-mapping=no
target-colorspace-hint=auto
vf-pre=@rtx-hdr:d3d11vpp=nvidia-true-hdr