Dolby Atmos Tagging

Plex Media Server Metadata & Adding Files
1

Server Version#: 1.26.0.5715
Player Version#: Shield TV Pro latest Plex app beta

Why is that PMS doesn’t tag some movies as Dolby Atmos even though my AVR detects them as Dolby Atmos files? So far, the all TrueHD files that I play are detected as Dolby Atmos files by my AVR. For example, these two files:

image
image736×556 107 KB

image
image741×547 115 KB

The first one doesn’t have any Dolby Atmos tagging but the second one does. Why so?

2

MediaInfo shows the first one with Dolby Atmos too:

image
image912×537 13.5 KB

So I’m not sure if this is a Plex problem or something.

3

Short Answer: Edit the Title field of the audio track using MKVToolNix or similar tools.

Longer Answer:

Plex does not detect if a file has Atmos information. It detects the language, audio codec, and number of channels. That is what is shown in the Display Title field.

If the Title field is populated, Plex will combine that with Display Title when populating Extended Display Title.

In your first example, there is no Title information. In your second example, the Title is “TrueHD Atmos 7.1.”

How all of the above is displayed on-screen varies by Plex client.

If there is only one audio track, then Display Title is shown and Title information is not shown.

If there are multiple audio tracks, then the Title field may be visible when selecting audio tracks (varies by Plex client). It is displayed in Plex Web and the Android Mobile & TV apps. It is not displayed in the Plex app on LG TVs.

Example:

AC3 1.0 audio track from a movie on my server.
I set Title = Commentary using MKVToolNix Header Editor

Screenshot (1231)
Screenshot (1231)254×269 6.58 KB


Plex Web:

Screenshot (1230)
Screenshot (1230)356×180 29.9 KB


LG:

lg
lg1160×431 90.8 KB


MKVToolNix Header Editor:

Screenshot (1233)
Screenshot (1233)945×419 10.4 KB

1 Like
4

@FordGuy61 … You started a feature suggestion / vote topic on this back in 2017…

5

Yep. Still not detecting Atmos or dts:X, but things are improved from when I opened that suggestion.

DTS-HD is now detected and displayed.

The title field is also displayed on some clients. IIRC, it was not displayed on any in 2017.

Maybe someday… :slight_smile:

1 Like
6

Ok, well, that sucks. Radarr can detect if a file has Atmos so I would’ve thought that Plex can too.

7

@FordGuy61 is there any way to automate editing the title? I don’t want to do this manually as I have everything mostly automated if possible.

8

MKVToolNix has a command line interface (see mkvpropedit). There is probably some way to script it. Same with ffmpeg. That’s out of my wheelhouse, so I will not be of any help in that area.

1 Like
9

Automation certainly can be done. I use mkvpropedit through a for loop in order to perform the action across a select batch of files in a specific location.

Here’s the content of a batch file I made…

For %%A in ("*.mkv") do (
	
	CLS
	
	REM echo full path: %%~fA
	REM echo directory: %%~dA
	REM echo path: %%~pA
	REM echo file name only: %%~nA
	REM echo extension only: %%~xA
	REM echo expanded path with short names: %%~sA
	REM echo attributes: %%~aA
	REM echo date and time: %%~tA
	REM echo size: %%~zA
	REM echo drive + path: %%~dpA
	REM echo name.ext: %%~nxA
	REM echo full path + short name: %%~fsA
	
	echo Orig Filename:   %%A
	echo Filename Only:   %%~nA
	echo Extension Only:  %%~xA
	echo Output Filename: %%~nA_Out%%~xA
	echo.
	
	echo Running mkvmerge...
	echo.
	
	
	IF EXIST 01-AudioTrackName.txt (
		
		SET /P AudioTrackName=<01-AudioTrackName.txt
		
		ECHO Setting Audio Track Properties to...  !AudioTrackName!
		REM ## Set the Title for Audio Track 1
		"C:\Program Files\MKVToolNix\mkvpropedit" --edit track:a1 --set language=eng --set flag-forced=0 --set flag-default=1 --set name="!AudioTrackName!" %%~nA_Out%%~xA
		echo.
		
		REM PAUSE
	
	)
	
	
	IF EXIST 02-VideoTrackName.txt (
		
		SET /P VideoTrackName=<02-VideoTrackName.txt
		
		ECHO Setting Video Track Properties to...  !VideoTrackName!
		REM ## Set the Title for Video Track 1
		"C:\Program Files\MKVToolNix\mkvpropedit" --edit track:v1 --set language=eng --set flag-forced=0 --set flag-default=1 --set name="!VideoTrackName!" %%~nA_Out%%~xA
		echo.
		
		REM PAUSE
		
	)
	
)

You will need to ensure that there are also 2 txt files in the same location as the batch file, called…

01-AudioTrackName.txt
02-VideoTrackName.txt

And in the txt files I have something like…

3.5 Mbps TrueHD / Atmos 7.1 Surround > within 01-AudioTrackName.txt

and

6.5 Mbps 10Bit x265 1080p > within 02-VideoTrackName.txt

Good luck :+1:

1 Like
10

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