Injecting multichannel to mv-hevc with mp4box

[hanneshonkanen]

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System: macOS Sonoma 14.5

Hello!

I've tried injecting multiple channels to mv-hevc mov prores file using the Mp4box, but the number of channels is always reduced down to 3.

Is it possible, and how, to inject multiple channels (like ambisonics or dolby 5.1)?

This is the command I used:

mp4box -new -add /path/video.mov -add /path/audio.aac  /path/finalvideo.mov

[jeanlf]

There is no specific limit in the number of audio channel, seems like a bug with the source. COuld you upload some test content ?