Adjust GUI SDR peak luminance when display is in HDR PQ mode

Kodi
1

I was wondering if it would be possible to implement something like this in CoreELEC:

This PR is meant for Android. It will reduce the brightness of the OSD and subtitles when an HDR or DV video is being played. Any chance something similar could be implemented on the Amlogic devices?

2

Hi, its feature working fine under android, its part of kodi omega.
The subtitles and the GUI, user choice, can reduce the brighness in hdr/dv mode in those elements.
Would be nice when that would be possible under CoreElec too…

3

Forgot to post this here, but this can be achieved by adding this to your autostart.sh:

echo 200 > /sys/module/amdolby_vision/parameters/dolby_vision_graphic_max

This will limit the brightness of the OSD and subtitles to 200 nits.

Unfortunately it cannot be done in the GUI (and doesn’t work for HDR, only DV).

1 Like
4

Must the luminance controlled also in HDR10(+) or only when DV mode?

EDIT:
The feature will be included in nightly since 20240522 CE-21/22 for DV.

2 Likes
5

In the Android version, the luminance setting works for both HDR10(+) and DV.

This is because in both cases, the luminance of the OSD elements and the text-based (.srt) subtitles become too high and will hurt your eyes if nothing is done :slight_smile:

6

Awesome, thanks @Portisch :+1:
Yes, would be nice to all hdr type.

7

I changed it for DV + HDR, so check it tomorrow.

2 Likes
8

This seems to working great for HDR and DV.

Is it possible for this to also be enabled for HLG?

9

It must be included, yes.

10

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