We're hearing multiple reports worldwide from subscribers to Apple TV+, Apple's video streaming service, about the loss of support for watching shows in Dolby Vision HDR on Apple TV 4K set-top boxes connected to compatible 4K TVs.
Over the past two weeks, more and more users have taken to the MacRumors forums, Twitter, Reddit and Apple's discussion pages to highlight the problem, which appears to be affecting not only new show episodes as they're made available, but existing episodes hosted on the service that previously worked in Dolby Vision HDR.
For example, early episodes of "See," "The Morning Show" and "For All Mankind" are no longer being streamed in dynamic Dolby Vision HDR, but revert back to static HDR in HDR10 format on TVs that officially support Dolby Vision. The same goes for brand new episodes of these shows that were released today, despite the fact that they still carry the Dolby Vision HDR support label on the summary screens.
Compared to static HDR10 which works uniformly across content, Dolby Vision HDR use dynamic image metadata that enables Dolby Vision-capable TVs to adapt the extended color gamut and increased contrast range of HDR on a scene-by-scene and even frame-by-frame basis. Losing the DV HDR support can result in scenes that look too dark, appear like a negative image, or have an odd tint to them.
@UHD4k I don’t know if it’s just me but today on my Apple TV 4K when I watch an Apple TV+ show (See and Morning show) it’s in HDR instead of Dolby vision. Used to work fine.
Weird. — Djems (@Djems94) December 6, 2019
Some users have suggested that the affected episodes may still be encoded in Dolby Vision and it's actually a bug in Apple TV's Match Dynamic Range feature that's preventing the set-top box from outputting the source content correctly. However, it seems more likely that Apple has removed support from the source content while it resolves a problem streaming shows in Dolby Vision.
It's worth noting that the problem doesn't currently seem to affect all shows on Apple TV+ for at least some users. There are scattered reports that "The Elephant Mother" documentary and Apple's "Dickinson" show still appear to be streaming in full Dolby Vision HDR, as do some kids shows like "Snoopy in Space."
We've contacted Apple for comment on the issue and will update this article if we learn anything more.
