Originally Posted by Woof Woof
Are you playing HDR content on the AppleTV?
If you have the latest firmware on the AppleTV you should match frame rate and range.
Originally Posted by Mike Garrett
From what you described, everything sounds correct with the settings. What do you see on the JVC info, when playing an HDR movie? How does a UHD HDR movie look and what is showing on the JVC info?
I had some time to play around with a bunch of settings last night. Here is what I have tested so far...yes, I do have the latest and am on public beta so had the match frame rate and dynamic range for a while.
Equipment: ATV4k - OPPO (HDR off BT2020, mode 2, 300 nit) - Denon AVR-S730 (enhanced passthrough HDMI) - JVC x770 (user 1 mode, BT2020 color space, HDR(6500) temp, high lamp (-7), auto 2 DI, color, contrast, bright all 0).
Now, the ATV allows the user to setup a million and one different video "resolutions" which is used for a) the main ATV interface and b) to scale ALL content (if match dynamic range is off). I have tested both 4k 60 HDR 4:2:2 and 4k 60 SDR 4:4:4 as the primary settings on the ATV. I used to keep dynamic range and frame rate match "OFF" so everything scaled, however, I decided to change both dynamic range and frame rate to match for my testing. As above I kept all the settings the exact same except for ATV. What I watch is really only 3 things...first, itunes movies (both HD 1080p and 4k HDR). Second, Netflix both HD 1080p and 4k HDR. Third, Bell Fibe (similar to Direct TV in US) app which is HD 1080p. So really a mix between regular HD shows and when available 4k HDR movies on itunes and Netflix.
First, with 4K 60 HDR 4:2:2. The main ATV menu is shown in 4k HDR (as it would auto switch JVC to HDR mode prior to Vertex). As I watch NON HDR stuff (which is mostly Bell TV and some movies non 4k HDR) the ATV actually upconverts the video to 4K HDR. It does NOT see the Bell Fibe app as anything but HDR because it's converted by ATV (ie no dynamic range matching occrus) The OPPO then sees this as HDR and does it's tone mapping output to JVC (which is set for SDR). Image was "meh" on most things, including HDR based movies from itunes.
Second, changed to 4k 60 SDR on the ATV. With JVC BT2020, gamma 2.4 the colors are WAY oversaturated...greens, reds especially. This is true only for NON HDR content like the main menu of ATV, Bell Fibe TV app, and any non HDR movie. I have calibrated both gamma (standard which will work with 2.4 custom) AND BT2020 so wondering why the oversaturation.
So..my next test tonight will be to set the video output of ATV to HD 1080o 60 as this is what non 4k (SDR or HDR) content is set at (itunes HD movies, HD Netflix and HD Fibe TV) and have the dynamic range match on. This SHOULD play 4k HDR content when presented on ATV and have the OPPO so the tone mapping.
Any other suggestions at this point? Overall, I did find that when I had set the ATV to 4k SDR, playing HDR content like Harry Potter from itunes looked AMAZING both color (brighter, vivid) and details/shadow compared to "custom" curves. I am trying to set it to work for all content somehow. Perhaps I need a true 1080p rec709 color space mode for all content but HDR and use my vertex to switch modes right out of the ATV, BEFORE the OPPO. Then if the content is HDR, it gets sent that to OPPO for tone mapping, JVC switches to my User 1 with BT2020.