Okay, strange no clue what's wrong with VLC, but it from time to time it has issues with mp4 files.
Personally, I'm using MPC-HC which works better for me than VLC.
When I use VLC I usually use the current nightly build (https://nightlies.videolan.org/). Currently, I would use the nightly build of v4.
Reading the changelog over at https://github.com/videolan/vlc/blob/master/NEWS regardint the changes from 3x to 4x, it states:
"Fix regression on some MP4 files for the audio track" <- this might be your issue, so trying VLC 4.x might help.
Cu Selur
Personally, I'm using MPC-HC which works better for me than VLC.
When I use VLC I usually use the current nightly build (https://nightlies.videolan.org/). Currently, I would use the nightly build of v4.
Reading the changelog over at https://github.com/videolan/vlc/blob/master/NEWS regardint the changes from 3x to 4x, it states:
Demux:
* Adaptive: fix artefacts in HLS streams with wrong profiles/levels
* Fix regression on some MP4 files for the audio track
* Fix MPGA and ADTS probing in TS files
* Fix Flac inside AVI files
* Fix VP9/Webm artefacts when seekingCu Selur
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Dev versions are in the 'experimental'-folder of my GoogleDrive, which is linked on the download page.
Dev versions are in the 'experimental'-folder of my GoogleDrive, which is linked on the download page.