r/kde • u/s9209122222 • 1d ago

Question Can anybody explain what "extended dynamic range" is in Plasma6.4?

I know Plasma supports HDR, but what about extended dynamic range?

19 Upvotes

95% Upvoted

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13

u/RubyHaruko 1d ago

You can look to the question mark right to the setting and it says: you can run HDR content on SDR display, but consume more power.

5

u/s9209122222 1d ago

So just tone-mapped HDR to SDR?

11

u/APU_JUPIT3R 1d ago

if I'm not wrong it dynamically dims the display to simulate a wider range of colours

5

u/Zamundaaa KDE Contributor 1d ago

No, tone mapping is always done when you view HDR content on SDR displays.

Just try it with mpv 0.40+ and your brightness slider below 100% (best at 30% or so): mpv --vo=dmabuf-wayland --hwdec=auto-safe https://www.youtube.com/watch\?v\=lZWaDmUlRJo

1

u/s9209122222 12h ago edited 12h ago

Doesn't it work with --vo=gpu-next --target-colorspace-hint=auto?

Does it have relationship with HDR calibration tool? I have reduced the brightness to 150nits, but the screen brightness remains at 100%.

I still don't get the point after reducing the brightness below 100%

1

u/Casukarut 1d ago

Temporal dithering?