Not a bad idea. Of course that test would be specifically for my client/TV/AVR combination.
I don’t have any movies with DTS-X or Atmos soundtracks but I have files with TrueHD and DTS-HD Master Audio and they have mostly worked. I ran into a couple TrueHD tracks that have caused issues.
there no KNOWN combinations of E-ARC TV + E-ARC AVR that can pass TRUEHD+ATMOS via plex.
If the combination of LG 65C9 OLED & Sony STR-DH790 truly pass unmodified truehd+atmos, I would like screen shots of the plexweb status, and a picture of the receiver with truehd+atmos indicators lit up.
OK, it looks like I can download sample files with those audio formats from these locations:
https://www.dolby.com/us/en/guide/dolby-atmos-trailers.html
When I get a chance I will give it a try.
Just to be clear, I wasn’t saying they would work but I’m willing to test it out. For science!
Also, I don’t have height speakers. I’m only running a 5.1 setup. Will Atmos still display on my receiver? I guess I will find out…
e-arc may indeed work with shield, as it goes over hdmi, like a bluray player.
unfortunately, it seems (so far) that all e-arc tv’s do not pass truehd+atmos from a built-in plex tv app.
so, let me qualify my statement;
no known smart tv with e-arc can pass truehd+atmos internally via plex.
the OP may be the first (that I am aware of) to use shield + e-arc-tv + e-arc avr.
and if that works, its great. but that still means you need a separate player, instead of using the tv plex app itself.
I tried a couple files but I am not getting atmos to display on my receiver.
I’m not sure I’ll get atmos to play from any source with my 5.1 speaker setup. I will change my setup to 3.1.2 and try again later.
OK, I reconfigured my speakers to 3.1.2 and was able to get ATMOS to display on my AVR using both 1) the LG TV’s built in Disney+ app playing Empire Strikes Back, and 2) using the Shield Pro to play the Dolby_Amaze_Lossless-ATMOS-thedigitaltheater.mkv file from the Dolby Trailers page I linked earlier. It says the file has Dolby TrueHD 7.1 ATMOS.
Here are the photos:
The Plex dashboard doesn’t specifically say ATMOS so I’m not sure if that means anything.
Also, the receiver display scrolled through the text “DOLBY ATMOS - DOLBY TRUEHD” and then settled on displaying ATMOS after the scrolling was complete.
Is that a successful test? I know these things can be more complicated than they seem.
Oh yeah, here is a shot of my LG TV eARC settings:
Edit: Specified that I used the Shield Pro to play the file.
looks good to me, thanks for the confirmation.
plex itself doesn’t display ‘atmos’ anywhere.
so we now know that SHIELD will work over E-ARC with compatible tv/avr.
now if we could just find a tv that could do true-hd/atmos over plex internally with e-arc.
There is a built in LG TV app. I just tried it. It made my server transcode the audio to AAC.
Check the PassThrough option in the App.
I have similar on the Nvidia Shield. With Passthrough enabled, it sends to the Onkyo as-is.
The shield passed atmos through the tv to the avr fine (very cool 
).
I was responding to the question about the LG TV plex client when I said it transcoded the audio.
Carry on !
scampers off to his hiding spot to resume development work
Keep up the good work! I have been using Plex more than any of my subscription streaming services (like Netflix or Amazon).
Interesting, I’ve just tried the 200mbps hevc jellyfish file and it plays without any issues on my Shield TV Pro (2019) with the new player. My server is on a Windows 10 Pro machine. Everything’s wired (10G + 1G). I hope this helps in your investigation in some way.
The 250mbps file is being transcoded (not sure why yet).
Hmm. I just tried the 200Mbps file again in case the last client update changed something but I still get the error on the Shield TV Pro (2019). Curious. Perhaps it is a matter of hardware quality for each individual Shield. Sort of like when PC folk would overclock their machines. People would have varying results on how high they could get their CPU running based on the quality of their inividual CPU (for a group of people using the same CPU model). Just speculation, of course.
The same 200Mpbs file plays on my PC using Plex for Windows and all the hardware is the same up to the network switch that the PC and Shield are both plugged into.
Excellent point. I was trying to play the jellyfish-200-mbps-4k-uhd-hevc-10bit.mkv file.
Edit: I just tried the jellyfish-200-mbps-4k-uhd-h264.mkv on my Shield Pro and it still gives me the error.
@pproba Did the 200Mbps file direct play or was it being transcoded by your Windows 10 PC Server?
So, there’s a small update. The file I was using was jellyfish-200-mbps-4k-uhd-hevc-10bit.mkv.
After I’ve tried out the 200mbps (successful) and 250mbps (unsuccessful) videos I’ve changed to the old player and tried the 200mbps file -> it transcoded.
I’ve closed the plex app and started it again, was greeted with a new splash screen (new watch together feature) and since then I haven’t managed to direct play the 200mbps video anymore.
Before it definitely direct played, in several attempts.
I even made a screenshot:
Plex for Kodi on the other hand has no trouble direct playing the 200mbps and even the 250mbps HEVC 4K versions. I’m currently downloading the 300mbps and 400mbps files to try them out.
Mysterious. I seem to recall something about Plex analyzing the files during maintenance. I wonder if, during that process, it sets up a parameter that tells the server to transcode that file or not.
Edit: found a link to a relevant post…
I haven’t tried Plex for Kodi yet but it sounds like I need to set that up as a fallback/troubleshooting player.
Looks like we are all getting slightly different results for the same files on the same hardware. Odd.
Edit 2: I found this support page that discusses this topic (but it focuses mostly on remote play).
https://support.plex.tv/articles/227715247-server-settings-bandwidth-and-transcoding-limits/?_ga=2.9710965.1533728452.1586114438-1360080259.1581431966
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