Apple TV 4K flickering issue

I have noticed very recently that when a show is particularly dark (nighttime scene, shadows in the background) the blacks will flicker in only the darkest areas. I thought I fixed this when I changed around settings but the last 10 minutes of Loki on Disney Plus are a flickering mess. I ordered a new Belkin HDMI cable. No difference. Internet is very fast, and currently no other app is causing me problems. I’ve turned everything on/off, I’ve reset settings. Still nothing! Help!

Apple TV 4K, tvOS 14

Posted on Jun 17, 2021 9:24 AM

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3 replies

Jul 12, 2021 7:44 AM in response to axm1208

So I think I managed to fix it.

I do have an Ultra HD Samsung TV so I had the Apple TV setting on HDR. I decided to mess around with the settings. 60 Hz SDR with Match Content Dynamic Range OFF and Frame Rate Match Content ON. HDMI output RGB High. Color Balance ON. I rechecked the last 10 minutes of Ep: 1 of Loki. Looks good with no flicker and first 10 minutes The Witcher Ep: 1 (which was also giving me trouble). It’s overall a little more contrasty. The blacks have slightly less detail than with HDR but it’s better than a constant flicker which was driving me absolutely nuts!

Jul 10, 2021 3:41 PM in response to axm1208

Its driving me nuuuts. I hadn’t noticed before Loki. Now all I can see is the bloody flickering. I can see it in every streaming service, HBO max is the worst (I believe since their video quality is usually inferior to the D+ and Netflix).


At first I thought I could be the app, or the cable, or the tv (a brand new Samsung QLED, by the way), then the file. I spent hours comparing between the apps I use the most, even tried playing movies on Infuse, from my NAS server, but the issue was somewhat persistent. Sometimes I wondered if it could really be the tv panel.


Im no developer, but to me, as a photographer / video editor, it seems like when a software is dealing badly with digital noise / compressing artifacts, since it affects patches on the shadowy areas, usually a color band with similar luminance values.


I was watching a movie on HBOmax and the quality was terrible, compared to the same movie on the netflix catalog.


I came around to blame the ATV4K when I compared that both on the ATV and the tv’s native apps and the flickering appeared only on Apple TV.

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Apple TV 4K flickering issue

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