It's both. there's dolby vision profile 5 (netflixn amazon and disneyplus streams can have them in certain configs) which doesn't have hdr10 fallback and thus will show purple and green when showing on a non dolby vision enabled display. Profile 8 has a hdr10 fallback layer for hdr10 or sdr only devices to display the colors properly, and will then enable dolby vision enhanced colors on supporting displays.
Dijitul
Yes, DoVi Profiles 5.03 and 5.06 were used for Dolby Vision HDR encoded streams by some downloaders for a while. In these files there is only a Dolby Vision layer for HDR colors, with no fallback to HDR10 for playback on equipment that doesn't support Dolby Vision.
If you have any "link in the chain" that doesn't support Dolby Vision (DV), it will give you a Green and Purple type picture. For example, when Black Adam first hit Max, it was downloadable as distinctly as DV only with "HDR format : Dolby Vision, Version 1.0, dvhe.05.06, BL+RPU" per MediaInfo, and HDR10 only with "Color primaries : BT.2020". When playing the DV copy with dvhe 05.06 on a Roku Ultra 4670 and Sony X800D TV, neither of which support DV, results in green/purple picture. Its really evident in the first scenes with dialog.
That likely does explain
@Chameleon 's purple hue issue.
Is the updated Netflix downloader pulling down H265 from Netflix as DV/HDR instead of SDR? I mean I saw something similar with Max on Anystream where if HEVC was selected, and there was a 4K available, even though I selected HEVC Only, didn't select DV or DV/HDR, I got an HDR encoded 1080p file.
DoVi Profile 8, specifically 8.06 which is what the streamers have switched to recently, and Profile 7, 7.06 which they had been using too, is Dolby Vision with HDR10 fallback. So yes, on DV equipment Dolby Vision is used for HDR Colors, however on equipment that supports only supports HDR10, it uses HDR10. Note: some devices can't play Profile 7 files and result in black picture, Kodi and Plex added work arounds to their apps.
But unfortunately none of these profiles have fallback to SDR. On SDR only equipment, these files wont display the colors right at all.
Then there's Dolby Atmos which is a surround sound format, usually 5.1 but can also be 7.1. We can get the lossy format from disney plus or supporting netflix titles (with uhd account). Dolby Atmos can also be found in dolby truehd lossless tracks, but that's not relevant to SF downloading.
dolby atmos is for object encoding in space, vs dolby digital plus and dolby digital have fixed object channel encoding and thus may not sound as good to you as an atmos track.
Dijitul
Just for clarification.
Lossless Atmos is usually TrueHD with Atmos object meta data on top to add "height". Typically its 9.1 or 7.1. On most 4K discs its 7.1 for home theaters. Most Atmos home theaters are 7.1.2 or 5.1.4.
Dolby Digital Plus, or EAC3, is a lossy codec that is an enhanced version of AC3 codec. It does allow for the Atmos Object Meta data. This is how the streamers do Atmos. In the downloads with Atmos audio tracks you'll see EAC3-JOC (Join Object Coding) audio tracks, which are lossy DD+ w/Atmos object meta data. EAC3-JOC is typically 5.1 (aka 6 channel), and usually 768kbps but sometimes 640kbps. When I play them back, my receiver does denote DD+ Atmos 5.1.4.
