Thanks for reporting your issue. Please make sure these boxes are checked before submitting your issue - thank you!

- [x] I looked for a similar issue and couldn't find any.
- [x] I tried with the latest version of GPAC. Installers available at http://gpac.io/downloads/gpac-nightly-builds/
- [x] I give enough information for contributors to reproduce my issue (meaningful title, github labels, platform and compiler, command-line ...). I can share files anonymously with this dropbox: https://www.mediafire.com/filedrop/filedrop_hosted.php?drop=eec9e058a9486fe4e99c33021481d9e1826ca9dbc242a6cfaab0fe95da5e5d95

Dolby vision profile 5 is working great on Apple TV but Dolby Atmos is recognized as DD+ only. If I use mp4muxer Dolby Atmos works. This can be reproduced demuxing any mkv with FFMPEG and muxing it with mp4box. 

DD+ Atmos not working on Apple TV
This is a GitHub Issue
repo:gpac
owner:gpac
Title : DD+ Atmos not working on Apple TV
Issue date:

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Thanks for reporting your issue. Please make sure these boxes are checked before submitting your issue - thank you!

- [x] I looked for a similar issue and couldn't find any.
- [x] I tried with the latest version of GPAC. Installers available at http://gpac.io/downloads/gpac-nightly-builds/
- [x] I give enough information for contributors to reproduce my issue (meaningful title, github labels, platform and compiler, command-line ...). I can share files anonymously with this dropbox: https://www.mediafire.com/filedrop/filedrop_hosted.php?drop=eec9e058a9486fe4e99c33021481d9e1826ca9dbc242a6cfaab0fe95da5e5d95

Dolby vision profile 5 is working great on Apple TV but Dolby Atmos is recognized as DD+ only. If I use mp4muxer Dolby Atmos works. This can be reproduced demuxing any mkv with FFMPEG and muxing it with mp4box. 

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