Hi all,

I'm running into a issue with MP4's with Dolby Atmos

When I run  these commands,

`mp4fragment './media/Universe_Fury2.mp4' './media/Universe_Fury2.mp4-f.mp4'`
`mp4-dash.py './media/Universe_Fury2-f.mp4' --hls --profile='on-demand' -o'./packaged/'`

I get the following console log error.

```
ERROR: 'atmos'

Parsing media file 1: ./media/Universe_Fury2-f.mp4
Extracting track 2 from ./media/Universe_Fury2-f.mp4
Extracting track 1 from ./media/Universe_Fury2-f.mp4
Parsing media file 1: tmp7d7rnngy = Extracted[track 2 from ./media/Universe_Fury2-f.mp4mp4]
Parsing media file 2: tmppclu11qi = Extracted[track 1 from ./media/Universe_Fury2-f.mp4.mp4]
Processing and Copying media file tmp7d7rnngy = Extracted[track 2 from ./media/Universe_Fury2-f.mp4.mp4]
Processing and Copying media file tmppclu11qi = Extracted[track 1 from ./media/Universe_Fury2-f.mp4]
[Finished in 5.5s with exit code 1]
```

The media used for this is a demo mp4 from Dolby tah can be found here https://developer.dolby.com/tools-media/sample-media/video-streams/hd-video-streams/

Running the code from the latest code from github (cloned 25 July 2022)

mp4-dash atmos error
This is a GitHub Issue
repo:Bento4
owner:axiomatic-systems
Title : mp4-dash atmos error
Issue date:

--- start body ---
Hi all,

I'm running into a issue with MP4's with Dolby Atmos

When I run  these commands,

`mp4fragment './media/Universe_Fury2.mp4' './media/Universe_Fury2.mp4-f.mp4'`
`mp4-dash.py './media/Universe_Fury2-f.mp4' --hls --profile='on-demand' -o'./packaged/'`

I get the following console log error.

```
ERROR: 'atmos'

Parsing media file 1: ./media/Universe_Fury2-f.mp4
Extracting track 2 from ./media/Universe_Fury2-f.mp4
Extracting track 1 from ./media/Universe_Fury2-f.mp4
Parsing media file 1: tmp7d7rnngy = Extracted[track 2 from ./media/Universe_Fury2-f.mp4mp4]
Parsing media file 2: tmppclu11qi = Extracted[track 1 from ./media/Universe_Fury2-f.mp4.mp4]
Processing and Copying media file tmp7d7rnngy = Extracted[track 2 from ./media/Universe_Fury2-f.mp4.mp4]
Processing and Copying media file tmppclu11qi = Extracted[track 1 from ./media/Universe_Fury2-f.mp4]
[Finished in 5.5s with exit code 1]
```

The media used for this is a demo mp4 from Dolby tah can be found here https://developer.dolby.com/tools-media/sample-media/video-streams/hd-video-streams/

Running the code from the latest code from github (cloned 25 July 2022)

--- end body ---

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