Thanks to your remark I have just tried MrMC, which looks like a Kodi port for tvOS.
The interface is a total disaster. It freezes for no apparent reason.
But for the one video that looked totally wrong with Infuse, it looks OK with MrMC, similarly identical to the output of the Apple TV’s native media player for homesharing and my Android TV’s native media player.
In the video/ acceleration settings, make sure to check
Allow hardware acceleration - VideoToolbox
Allow hardware acceletaion - AVFoundation
and uncheck (this is their recommandation to get correct color mapping)
Use VideoToolBox for 4K HEVC HDR content
I know this is out of topic to talk about MrMC here, but I hope these settings can give James and the Firecore team some ideas about why color mapping has issues (VideooTolBox?)
And, if a software like MrMC (which I really don’t like - but some people do, so I changed the rather strong words I used before) can get HDR color mapping right, I am sure Infuse can have its HDR rendering issues solved very soon!
You can see through the screenshots I posted earlier in this thread, that MrMC and Infuse images are almost identical for me, and neither are sending HDR data even though HDR is triggered on my TV. This does not happen with my UHD player, HDR works as intended.
My files are all rips from personally owned media using DeUHD and MakeMKV.
I don’t have these freezing issues with MrMC, but to call it “trash software” is a bit hyperbolic. There are a lot of things about the interface that I really like. For example, the people browser is a very cool and useful feature.
We’ve identified 2 issues that are affecting some videos and TVs.
For certain HDR videos, colors are not getting passed correctly. The effect of this is somewhat subtle, but it’s something we are in the process of fixing.
The Apple TV is not correctly setting the HDR video flag required by some TVs. This is more of a bug/limitation in the current tvOS software, but we think we’ve found a way around this. Fix also in progress.
I came across the HDR-Problem when using the ATV on my Sony VW760 projector. HDR is way to dark, no „punch“ in the highlights.
Very easy to see with the Sony HDR test charts derived from a Sony UHD-BD. Same problem when connecting the ATV on my 75XE9405 TV.