Dolby Vision Movies not working - Chroma 2.2.2 not working

Please verify your chroma subsampling options. I know of 4:4:4, 4:2:2, 4:2:1, 4:1:1, 4:2:0, 4:1:0, and 3:1:1. Not 2:2:2. Of these, only 4:4:4, 4:2:2, and 4:2:0 are relevant to HDMI connections.

All streaming video is 4:2:0 in the encoding. Any higher settings on your devices will not result in better video, it only uses more bandwidth. Just leave it at 4:2:0.

What is your model Apple TV? Identify your Apple TV model - Apple Support

Apple TV 4K (1st generation, 2017) and Apple TV 4K (2nd generation, 2021) have different HDMI ports with different capabilities (HDMI 2.0 vs. HDMI 2.1).

Hi George78,

Thanks for posting your question to Apple Support Communities! We understand that you're experiencing an issue with playing movies in Dolby Vision on your Apple TV, and that this seems to be related to the selected settings for chroma. We'd be happy to provide some information to assist.

Steps 1-4 here may assist with this behavior: About 4K, HDR, and Dolby Vision on your Apple TV 4K - Apple Support

If applicable, we'd recommend making sure the firmware or software on your TV and sound bar are up to date.

Should you still need assistance, please reach out to Apple Support here: Get Support

Regards.