I am finding this is an issue mostly on 4K UHD TVs that do not have HDR, which is odd because Netflix, Vudu, FandangoNow, Apple TV, and even Prime Video play back 4K UHD content just fine on my Roku Premiere on my older LG 4K UHD TV. Even more strange, the Disney+ app plays back in 4k UHD on the Fire TV 4K stick connected to the same TV.
I believe the content provider has to offer HDR and non-HDR versions, or it won't look right. When I watched HDR content on my 1080 plasma, it was really washed out and dull. So to look right on a non-HDR set, they either have to have a non-HDR version, or just send you the 1080 stream. My guess is Disney doesn't have non-HDR 4K. Since they are supported Dolby Vision, they have to have that available as well, so they probably decided against keeping a non-HDR 4K version as well. All just a guess, but that's my hunch.
Hdr is just extra metadata like atmos your tv should just ignore it there is no need for multiple 4k versions. Ultra had blu rays have dolby vision hdr 10 and hdr 10 plus they are all just metadata that is ignored by non hdr 4k tv.
Not in my experience. Playing HDR media on a non-HDR set looks terrible. I just tried one of my 4K HDR demo clips, playing on my Premiere (which supports 4K/HDR) on a 1080 non-HDR set. It looks really bad. Yes, a display that supports HDR but not DV will ignore the DV metadata. But if you want 4K content to look right on a non-HDR display, the media must not contain HDR metadata.
Hi. I'm having this same issue with my Roku Ultra. Our LG C8 OLED says the video is 1080P HR.2020 HDR on every movie that is said to be in UHD (Star Wars: A New Hope & Free Solo).
@GARoss This sounds like it may be a configuration issue for your particular TV make/model.
In your LG TV's settings, you'll need to ensure you have enabled 'Deep color' for proper HDR playback. See more here: https://www.lg.com/ca_en/support/product-help/CT20098005-1437131182045-menu-settings
Then, once enabled, go into Settings>Display type and try adjusting your display type to 4K HDR 60Hz, or see if 'Auto-detect' automatically selects this display type. See if you can then play 4K HDR content from Disney+.
If not, on your Roku, try going into Settings>System>Advanced system settings>Advanced display settings>HDR subsampling and try changing this from 4:2:0 to 4:2:2. Then, try playing 4K HDR content from Disney+ again. (Note: Not all content will offer this format. You need to confirm that this format is available on the content you are trying to play.)
Keep us posted from there!