Windows Server, Windows Desktop Player, Denon Receiver, TV as monitor.
Player Settings: Recvr selected as Audio Device, 48GB/s HDMI, Exclusive Audio selected, 5.1 selected, All audio passthroughs selected. Plays fine, no buffering or skipping/clipping.
I am attempting to now make the most of my new surround receiver. I found a Dolby Atmos audio track to a movie I enjoy. I moved that audio file to the folder containing the video.
On the movie’s info screen showing all the metadata, the audio populates as HE-AAC 7.1, and the Subtitles populates as English, with a drop-down that includes many other languages. There is no drop-down to choose which audio to play.
Am I doing this correctly?
Are you sure that 7.1 is not an existing track in the video file? I’ve never heard of us supporting a separate audio track like that. AFAIK it needs to be embedded/muxed into the video file to be given as an option as another audio track. Apps like mkvtoolnix make short work of muxing in tracks.
I am not sure. I would imagine that it is the existing audio track as I have other movies with the same audio format.
Embedding and muxing are currently outside my skill set, so I will leave well enough alone for now.
Thank you.
The receiver will display “Atmos” on the front panel if receiving Atmos audio.
If Plex shows the audio as AAC, then I doubt the audio is TrueHD + Atmos (found on Blu-ray discs) or Dolby Digital Plus + Atmos (used by streaming services).
Examine the file with MediaInfo (text format). It will show details of all the video/audio/subtitle tracks.
As @BigWheel mentions, you can use MKVToolNix to remove undesired tracks (Multiplexer), retag tracks with correct info (Header Editor), or add/modify chapters (Chapter Editor).
Example MediaInfo output:
Dolby Digital Plus + Atmos
ID : 2
Format : E-AC-3 JOC
Format/Info : Enhanced AC-3 with Joint Object Coding
Commercial name : Dolby Digital Plus with Dolby Atmos
Codec ID : A_EAC3
Duration : 1 h 0 min
Bit rate mode : Constant
Bit rate : 768 kb/s
Channel(s) : 6 channels
Channel layout : L R C LFE Ls Rs
Sampling rate : 48.0 kHz
Frame rate : 31.250 FPS (1536 SPF)
Compression mode : Lossy
Stream size : 333 MiB (14%)
Title : Dolby Digital Plus Atmos
Language : English
Service kind : Complete Main
Default : Yes
Forced : No
Complexity index : 16
Number of dynamic objects : 15
Bed channel count : 1 channel
Bed channel configuration : LFE
TrueHD + Atmos
ID : 2
ID in the original source medium : 4352 (0x1100)
Format : MLP FBA 16-ch
Format/Info : Meridian Lossless Packing FBA with 16-channel presentation
Commercial name : Dolby TrueHD with Dolby Atmos
Codec ID : A_TRUEHD
Duration : 2 h 4 min
Bit rate mode : Variable
Bit rate : 2 875 kb/s
Maximum bit rate : 4 188 kb/s
Channel(s) : 8 channels
Channel layout : L R C LFE Ls Rs Lb Rb
Sampling rate : 48.0 kHz
Frame rate : 1 200.000 FPS (40 SPF)
Bit depth : 24 bits
Compression mode : Lossless
Stream size : 2.49 GiB (11%)
Title : TrueHD Atmos
Language : English
Default : Yes
Forced : No
Original source medium : Blu-ray
Number of dynamic objects : 11
Bed channel count : 1 channel
Bed channel configuration : LFE
Edit: Here are some Atmos demo and test files. Place them in an Other Video library. FYI, the site has a lot of ads.
Not quite correct.
Atmos is not a number of channels.
It is a number of sound objects which are placed (and even moved dynamically) within a virtual 3D space that extends around the listener.
It’s up to the Atmos decoder to translate that to whatever speaker setup it is connected to.
You can even decode Atmos to 2 channels for headphones and retain some of of the spatial impression.
But this has not really something to do with Plex as it doesn’t touch the Atmos data stream. All it does is to forward it unchanged to the client, if that is technically possible.
