Today I had the time to test HDR with infuse with files that everyone can get and compare.
You can find very good videos here:
I used “LG Color of journey HDR UHD 4k Demo” for this.
Same behavior in dark scenes I saw last week by the movie “The Dark Tower” but I thought it was a rip issue…now I know I was wrong.
In dark scenes/parts of a movie there is a huge color banding and what you can’t see in the picture but in the movie is the restlessness in the color bands!
So let me show you what I mean.
I think the pictures speaks for themselves.
Look at the dark sky behind the woman.
That’s what I saw in every dark part (more or less) if I use infuse.
The apple player (direct or Plex or emby) doesn’t show this and the native TV player is from all of them the best with no fault.
I am having banding issues in dark scenes with a Samsung KS8000. I played HDR movies on my PC with HDR->SDR mapping with MPC-BE, it’s almost the same result playing on a HDR Samsung KS8000. There’s definitely not HDR playing, although the apple TV is switching to “HDR” mode.
I’m afraid your problem with posterisation is due to your Sony xd pannel. I have the same problem and it’s not just Apple TV or infuse, but anything you connect to the HDMI inputs on this tv. Although much more subtle I notice it whilst watching sky for example which is non hdr. I think the tv is incorrectly processing/mapping HDMI signals to the wrong colours. This is evident as the inbuilt apps and tv own tuner don’t suffer. You won’t get anywhere with Sony on this and it’s present in all xd panels (just google purple banding and fringing for your model number).
I was lucky enough to get my money back on this tv which is the only fix at the mo.
My Panasonic has slotted in its place on my wall and all issues are now gone.
And the justification is as simple; => The plex app and the “my computer” app uses the apple TV and so the HDMI input. Both with no fault.
And important too is the new firmware v3.925 for this TV is really good compared to the ones before and improved many things.
Glad your problem is to a lesser extent. Unless a fix came out in the last two weeks as regards firmware mine was like that on all HDMI sources. Very noticeable on HDR and very subtle on SDR, but there if you looked hard enough. Hundreds of comments about it on AVforums regarding that problem, purple fringing on dark scenes and the constant daily reboots and constant DPS board failures I’m glad to say I have managed to get a refund.
Hope yours stays in an exceptable condition, I really do.
All the best.