I don't get Atmos on this one file

Video Playback
1

I get Atmos from Apple Music.
I get Atmos from other mkv files in Infuse.

Just this one Dolby sample I want in my AVTest debug folder, that had two tracks 1:truehd(I know the issues there, so demultiplexed) and an EAC3 backup track. Used mkvtoolnix, and just deleted the other. What did I do wrong? Flagged as default and enabled. Proton Drive

Audio
ID : 2
Format : E-AC-3 JOC
Format/Info : Enhanced AC-3 with Joint Object Coding
Commercial name : Dolby Digital Plus with Dolby Atmos
Format profile : Blu-ray Disc
Format settings : Dolby Surround EX
Codec ID : A_EAC3
Duration : 3 min 7 s
Bit rate mode : Constant
Bit rate : 1 664 kb/s
Channel(s) : 8 channels
Channel layout : L R C LFE Ls Rs Lb Rb
Sampling rate : 48.0 kHz
Frame rate : 31.250 FPS (1536 SPF)
Compression mode : Lossy
Stream size : 37.3 MiB (7%)
Title : DDp 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

2

7.1 DD+ Atmos (ie 8 channels) is not support. Only 5.1 DD+ Atmos.

I don’t think this is an Infuse limitation, but an AppleTV one.

1 Like
3

doh! Thank you.

4

This is correct. It seems like a strange limitation, and maybe something that will change in a future tvOS update. :crossed_fingers:

1 Like
5

It does seem strange! I thought the EAC3 audio part got decoded to LPCM (which I could have sworn supports 7.1) and that Atmos metadata gets merged in as Dolby MAT.

6

Yes, you should get 7.1 PCM from these files but no Atmos.