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



I found some mp4box converted file audio is missing  on some players such as vlc ,windows media player and adobe premier 2023
detail and files are here
https://code.videolan.org/videolan/vlc/-/issues/27328

convert cmd is 
MP4Box -dash 30000 -profile onDemand mp4box.mp4 -out dash.mpd --dual 
no audio sometimes in fragment mp4
This is a GitHub Issue
repo:gpac
owner:gpac
Title : no audio sometimes in fragment mp4
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



I found some mp4box converted file audio is missing  on some players such as vlc ,windows media player and adobe premier 2023
detail and files are here
https://code.videolan.org/videolan/vlc/-/issues/27328

convert cmd is 
MP4Box -dash 30000 -profile onDemand mp4box.mp4 -out dash.mpd --dual 
--- end body ---
