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. Although #2695 also reports a seg fault in the latest gpac version.
- [x] I tried with the latest version of GPAC. Installers available at https://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

Detailed guidelines: https://gpac.io/bug-reporting/

MP4Box dxml is producing a segmentation fault. Seems to be related to commit `271e7e2` as versions before (e.g. `gpac-2.3-DEV-rev626-ge4d8e658-master` do not lead to the error).

Version tested: `MP4Box - GPAC version 2.3-DEV-rev635-gc81887c5-master`

Command to reproduce:

`MP4Box -dxml Chimera_2560x1440_30fps_1min_hevc_main10.mp4`

File can be downloaded from https://drive.google.com/drive/folders/15p-M-CPsAjaV1SFjt2tIzpYUndze71dr?usp=drive_link
MP4Box -dxml seg fault
This is a GitHub Issue
repo:gpac
owner:gpac
Title : MP4Box -dxml seg fault
Issue date:

--- start body ---
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. Although #2695 also reports a seg fault in the latest gpac version.
- [x] I tried with the latest version of GPAC. Installers available at https://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

Detailed guidelines: https://gpac.io/bug-reporting/

MP4Box dxml is producing a segmentation fault. Seems to be related to commit `271e7e2` as versions before (e.g. `gpac-2.3-DEV-rev626-ge4d8e658-master` do not lead to the error).

Version tested: `MP4Box - GPAC version 2.3-DEV-rev635-gc81887c5-master`

Command to reproduce:

`MP4Box -dxml Chimera_2560x1440_30fps_1min_hevc_main10.mp4`

File can be downloaded from https://drive.google.com/drive/folders/15p-M-CPsAjaV1SFjt2tIzpYUndze71dr?usp=drive_link
--- end body ---
