Originally Posted by thezrb
Hey all, I’ve been having an issue with 4K HDR content streamed through apples own iTunes service. On black or near black scenes there seems to be a pulsing or strobing effect that I haven’t been able to resolve. For instance, in the first 3 minutes of black mass outside the bar peripheral darker parts of my tv, not the letterboxed portions, exhibit this effect.
I’ve watched the same movie through vudu and it didn’t have any strobing or pulsing. I’ve tried bypassing my avr as well and it still pops up. I have a vizio pq65-f1 and will also post this in the relevant forum. But does anyone have any relevant thought on the matter?
Originally Posted by rolltide1017
I noticed the same thing on La La Land the other night. I don’t have the 4K version in Vudu so, I can’t check there. Haven’t seen it in anything else yet, but I’ve only check a couple.
I tell ya, I have had nothing but problems since upgrading to tvOS 12.2 back in March. I wish I could go back to an earlier firmware.
Originally Posted by souks83
This is also happening to me. I noticed it while watching the Harry Potter movies through the Apple TV app. Vudu doesn’t exhibit the issue. I also have a Vizio P55-F1
I registered for the forum when I saw this discussion...
I just want confirm this is what everyone is discussing:
"John Wick" clip:
This happens with 4K HDR and Dolby Vision iTunes movie purchases in the new (and improved???) tvOS 12.3 TV app on two Apple TV 4Ks. Non-HDR content plays just fine. Other apps play the same movies just fine.
I tried three different HDMI cables (all different manufacturers) using an LG 55SK9000, LG 65SK9000 (and also an LG OLED I hooked my Apple TV to at the store just for troubleshooting purposes). I power cycled everything from the Apple TVs, the TV's themselves and even the router and modem just to rule everything out. I also did a factory reset of the Apple TV. None of that fixed the problem.
The only "fix" (well, a workaround) is to put the Apple TV in 4K SDR and then those movies play without the flicker/pulsating dark scenes (of course, what's the point of having a nice HDR box and TV when the HDR doesn't work properly).
Anyways, I filled out a bug report on the Apple developer site (submitting those clips and some others as samples). I've also filed a report over the phone with Apple. If this is your problem, please phone Apple and report it to draw their attention to this issue.