[FFmpeg-user] How to keep/inject proper ambisonic audio metadata using ffmpeg ?

[yael Laouar]

I'm trying to encode a file using ffmpeg but I would like this file to have 360 metadata (audio and video) with this command : ffmpeg -i videoAmb2k_injected.mp4 -c copy -map_metadata 0 -map_metadata:s:v 0:s:v -map_metadata:s:a 0:s:a -b:a 128k testAddMetadata2.mp4


The input file "videoAmb2k_injected.mp4" got 360 metadata thanks to the spatial media metadata injector. But using this command, VLC does not play the file as a 360 video, and the audio isn't spatialize neither. By adding "-strict unofficial" option, I was allowed to keep 360 video metadata between input and output, and the video is played as spherical.


However, audio isn't spatialized. How can I inject or keep the right audio metadata so that any video player such as VLC3 interprets the audio as ambisonic ?


Thanks :)