I looked at your MONSTA music video clip and this makes sense why you are having issues. To start, you do not have a keyframe for every frame, in fact it is every 3 frames (more discussed here).
Next you are using the AV1 codec which is not fully supported by Apple. (More on that here. Youtube and Netflix now encode their HD videos in AV1 codec which Apple has not fully adopted in favor of their HVEC codec.
So you’ll need to do two things to for this media to playback correctly.
- Encode H.264 files with 1 keyframe per video frame
- Do not use passthru to encode from AV1 to an MP4 or MOV
I’ll take a look at your HAP files shortly.
