Hi,
Nice to see Dolby Vision support coming to iOS. After experimenting with a few of my titles, both in MKV containers and mp4 containers, I’m not seeing Dolby Vision kick in on the iPhone XS.
My MKV contained files fall back to HDR10 and the MP4 files simply display an overly green cast on the video. The MP4 file does not have an HDR10 fallback, it’s simply the Dolby Vision layer.
Is there limited device support, or a separate HDR setting I need to enable?
Thanks
I believe they are talking about videos taken with the iPhone 12 itself. iOS hardware is only compatible with the streaming version of Dolby vision, profile 5 I believe, so it wouldn’t be able to read profile 7 which is used on Blu-ray Discs.
Interesting.
I did some more testing a short while ago, and it does look like it is able to playback Dolby Vision in a .ts container.
I tested the LG Dolby Vision test file: https://4kmedia.org/lg-dolby-vision-uhd-4k-demo/
And yet it can. Anything with Dolby Vision that is profile 7 or 8 that passes Dolby Vision metadata to the Shield also now passes Dolby Vision to the ATV 4K. (Can’t test on iOS as I have an older iPhone.)
Here’s a really shaky crap video of Plex triggering DV on the ATV 4K.
https://drive.google.com/file/d/1SYOkeWXm0_Fy47IU4IdN-ybZ-rMrGXy4/view?usp=sharing
@dklein Be aware that Plex cant pass DV if the Atmos track is enabled. It works fine with anything DTS seemingly but you will have to manually select the AC3 compatibility track for anything with Atmos.
Thanks @Xhaka.
That may have been the issue with the MKV file. I figured that since it was direct streaming the video layer the DV metadata would transfer as well.
No dice on mp4 files though.
Yeah I only collect mkv nowadays although the .ts files I already had seem to trigger just fine. The MP4’s that I originally had for use with the native LG app are long gone from my collection so cant test.
I just find it a little bizarre that I cant find any release notes for the feature here on the forums
I only stumbled across it when I noticed an update in Testflight.
Same. I wish either the dashboard or Tautulli could report whether or not the DV metadata was being sent. They only show a generic 4K HDR tag when I look.
Yeah agreed. A separate Dolby Vision tag in filters for these files would be great too.
Holy cow just tested and you are right. Disabling the lossless track will trigger DV on the AppleTV 4k. I just wish the player was better on tvOS. Infuse can direct play lossless audio and less micro stuttering throughout the video. If you want to test try the remux of Gemini Man. Plex has never been able to play it more than like 12 fps. Infuse is like butter.
Actually, I just found out it doesn’t sadly. It simply turns on Dolby Vision mode on the device.
Wait…What?!
I finally see the DV logo on some of my ripped movies and your saying it not real? 
Can you explain what you mean by “…It simply turns on Dolby Vision mode on the device”?
Thank you so much for adding Dolby Vision support to the ATV 4K Plex app! I tested a half dozen MKV movies with Dolby Vision last night, but there seems to be all kinds of random issues. Lossless audio tracks seem to “break” the DV, so a fallback to HDR occurs. But even if I choose the lossy audio tracks, it’s 50/50 that DV will be enabled. I also had multiple app crashes while playing the DV files. Side note: I have the same issues on my 2019 Nvidia Shield when playin DV MKVs, just not as many occurrences. Keep up the great work as you continue to improve our Plex experiences!
Playback any file that you know is not even HDR (any 700mb avi will do) and watch it trigger Dolby Vision.
So assuming you don’t have DV enabled by default Plex is simply reading the meta info for the file and turning on DV on the device when those files are detected.
The fact is at a minimum the ATV 4K needs a firmware (if not a hardware) upgrade from Apple to play profile 7 or 8 DV files.
I would love to be proved wrong but after myself and several others have asked for clarification on what they actually mean by DV support. Not a single reply.
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