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You're getting somewhere but still not complete. HDR formats we have today use 10bit or 12bit bit depths so that alone is a big difference. About the metadata,

You're getting somewhere but still not complete. HDR formats we have today use 10bit or 12bit bit depths so that alone is a big difference. About the metadata, HDR10 uses static metadata meaning whole content will have the same metadata but HDR10+ and Dolby use dynamic metadata. HDR content "will not" be HDR if you're playing it under Linux. It will however be HDR if you play it under Macos or Windows (keeping everything else like the screen and content same). There is no way around this right now. So in basic terms you will not see the dark blacks and bright whites under Linux. > Edit - where HDR really is great is photography... You take multiple photos of the same scene with different ISO and shutter settings then stitch them together for more colours than would otherwise be captured. But a screen can either display colours or it can't. It's the same for video or games really. With HDR you can record and display more details and contrast. And that HDR photo you just described will not be shown as HDR even if your display supports HDR if viewed under Linux

Mikeb85 4y ago
HDR hasn't always meant 10 bit colour... But anyhow, Ubuntu supports 10 bit colour and has for awhile: https://wiki.ubuntu.com/DeepColourDepthSupportPlan https://wiki.ubuntu.com/DeepColourDepthSupportPlan
- neoberg 4y ago
  HDR as we know today always meant 10 bit colour. Before that some screens emulated HDR in 8 bit color by doing dithering to -poorly- create the illusion of a wider luminance range. edit: and 10 bit color support on its own is not enough for HDR. I mean I don't know why we are even discussing this honestly. HDR under Linux is not supported at all. It's not an opinion; it's an objective fact which you can confirm in a couple of different ways. You can not view HDR content if you're using Linux no matter what content or display you have. There is an active effort in the community to have HDR support in Linux but it will take a couple more years probably.

Mikeb85 4y ago

HDR hasn't always meant 10 bit colour... But anyhow, Ubuntu supports 10 bit colour and has for awhile: https://wiki.ubuntu.com/DeepColourDepthSupportPlan https://wiki.ubuntu.com/DeepColourDepthSupportPlan

neoberg 4y ago
HDR as we know today always meant 10 bit colour. Before that some screens emulated HDR in 8 bit color by doing dithering to -poorly- create the illusion of a wider luminance range. edit: and 10 bit color support on its own is not enough for HDR. I mean I don't know why we are even discussing this honestly. HDR under Linux is not supported at all. It's not an opinion; it's an objective fact which you can confirm in a couple of different ways. You can not view HDR content if you're using Linux no matter what content or display you have. There is an active effort in the community to have HDR support in Linux but it will take a couple more years probably.