ATV 4K Match Content does not work as expected with Sony TV

tvOS 11.4.1 which became available yesterday, resolves this problem. Dolby Vision with Match Content ON or OFF now works properly on my Sony A1E OLED.

Appreciate the suggestion, but that unfortunately does not work for me either...

When I change Format to 4K SDR (and Match Content ON), a new setting appears at the top of that ATV panel to "Enable Dolby Vision" (along with HDMI Output and Chroma settings that reappear, which I leave at YCbCr and 4:4:4 respectively). Assuming I don't make any further changes and leave Format in "4K SDR 60Hz" mode as you suggest, when testing content: ATV Menus, non-4K and 4K movies are in SDR as I would expect, but Dolby Vision movies like Ready Player One playback in basic 4K non-HDR and non-DV as well.

It very much appears I must have ATV Format set to Dolby Vision (and then also have Match Content OFF) to get any subsequent Dolby Vision playback on this Sony TV.

FWIW, my OPPO UDP-203 Blu-ray player last week received a firmware update, amongst other things to support this "Dolby Vision Player-led processing mode", and I'm now able to play Blu-ray DV discs or DV encoded files via the Blu-ray player and actually see them in DV on my A1E OLED. That was not the case in it's previous firmware releases that supported standard Dolby Vision processing where the TV is doing all the heavy lifting (e.g. on an LG OLED), where the Sony TV would drop back to 4K HDR10 only mode for DV content. This change to my Blu-ray player firmware, which was specifically called-out to better support DV content on TVs like my Sony, makes me feel even stronger that while Apple put in the support for this new DV processing mode in recent tvOS (thank you), they are not testing something correctly to then allow iTunes 4K DV movies to play on TVs using the outboard DV processing mode when Match Content is ON, as I and likely other owners would prefer.

Thanks again for your attempt to help!

I understand the point about HDMI 2.0 limitations. There are a couple of details though with at least my ATV interface that preclude me from doing (or at least ensuring) exactly what you suggest with ATV settings:

• When Format = 4K SDR, the HDMI Output and Chroma settings are available, but "Enable Dolby Vision" is displayed (so I assume DV is then disabled within my ATV, which it appears to be no matter what DV content I try to display with Content Match being ON or OFF.)
• When I select "Enable Dolby Vision", the ATV defaults to Format = "4K DV 60Hz" so I have always left it there as the ATV test screen works to my TV. Concurrently the HDMI Output and Chroma settings are removed from the ATV interface. As such, I assume Apple is doing it's magic trying to keep complexity away from users that can get them into trouble, and is setting HDMI Output/Chroma to what makes best sense from their POV when DV is enabled -- that's fine by me.

So, attempting to possibly get to your latest suggestion:

• I double-checked that both Match Content settings remain ON
• I set Format to 4K SDR to gain access to the HDMI/Chroma settings, and then dropped Chroma to 4:2:0 (only 4:4:4 and 4:2:0 are available options)
• I then Enable Dolby Vision, which changed the Format back to 4K DV 60Hz and eliminated the HDMI/Chroma settings from my menu

...and unfortunately, I'm in the same place I have been: iTunes 4K DV content only displays as Dolby Vision when I manually turn both Match Content settings OFF.

While I again appreciate the data point you're on about not exceeding aggregate HDMI data rates, I doubt very much that is a root cause of my problem with DV and Match Content since Apple removes Chroma from the user's control when DV is enabled. The only sort of thing I have control over in terms of data rates is Hz, and for the heck of it just tried DV at 50Hz with the same problems I've been describing. (BTW, If I have Format as 4K SDR 60Hz, ATV allows Chroma as 4:4:4 or 4:2:0, whereas if Format is 4K HDR 60Hz, ATV allows Chroma as 4:2:2 or 4:2:0, so it appears Apple is only presenting the best options that will work for a given combination in a particular user's setup. I always ran with Format at 4K HDR 60Hz and Chroma 4:2:2, until I enabled DV once ATV became available to try and gain use of DV benefits. My picture is pristine in every combination I've tried, including when I can get DV content to display on my ATV by changing Match Content settings. 😉)

Thx again.