Posts by Phoskam

Quote from noggin

Have you watched the same content in HDR via alternate sources such as a UHD HDR Blu-ray player? Is that brighter?

If not - then chances are you're just seeing the normally reported issue with HDR10 from people who have HDR TVs but normally watch SDR on them.

Most people with HDR displays are watching SDR content with the SDR peak brightness pushed well into the HDR range of brightness levels. The SDR range in HDR10 (and other specs) is officially 0-100nits (i.e. anything over 100nits is reserved for HDR speculars, detail in bright areas etc.). However this feels really dim to many people watching in regular light level rooms, and the reality is that most people watching SDR will have their peak SDR well over 100nits on an HDR TV.

As a result HDR stuff (which will keep most of the detail in the SDR range of 0-100nits) often looks a lot darker than people are expecting (particularly as many people think HDR = brighter picture, rather than more detail in highlights)

This is also somewhat complicated by HDR10 officially using PQ (Perceptive Quantisation) where the ST.2084 EOTF (video level - > display light level conversion) according to the standard is fixed to a 1:1 mapping - rather than relative (like SDR and HLG HDR) - so in theory you shouldn't be able to make an HDR picture brighter or darker with user controls (as that stops it being properly compliant with the HDR10 spec). (*)

Of course you will often find this can be overridden on many TVs - though it does mean that you are then likely to be clipping/squeezing more and more HDR detail (reducing the benefits of the HDR source), as the brighter you make the SDR picture, the less dynamic range you have left for the HDR elements.

Dolby Vision modes on TVs often go one step further and specifically stop you altering the display brightness levels at all.

(*) Arguably this is why HLG HDR makes a tonne more sense for domestic viewing (particularly as it has ambient light compensation built into the standard - rather than bolted on as a bolted-on afterthought like Dolby Vision IQ)

Changing the brightness/contrast of an image should really be a display function not a Kodi function.

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The other hdr stuff I watch is mostly dolby vision on Netflix or hdr movies on YouTube.

Both of these look much brighter, especially dolby vision.

Tonight were going to watch a movie, then the living room is also much darker.

Working for me now, my Sony 65XE9305 switches to hdr, but only thing is that in hdr the overall image looks pretty dark.

Is there a way to up the brightness in libreelec/kodi somewhere in the settings?

Hello Hias,

And which nightly do I need for rpi4?

There are so much versions when I look at the nightly list.

Thanks

Hello, i'm New to the libreelec forum.

Running libreelec on my rpi4 for long time, works perfect.

But would like hdr to work.

Is it possible to update to the nightly build with hdr support and keep all my other addons and settings in kodi?

And if possible how do I instal this nightly build ?

And can I downgrade back to 9.2.6 if needed?

Or is it better to take a New sd card and fresh install with latest nightly build and reinstall my addons?

Can you make a New sd card with nightly builds with the usb-SB creator?