3rd order ambisonics outputs in mono

[Kurville]

About a month ago, I uploaded on YT a video with 3rd order ambisonics and everything was fine.

I uploaded a new video today, also with 3OA: post-upload, very long processing and the result plays back in mono with Safari and Brave on macOS 26.1. I used FFmpeg to process the audio and video.

As something changed server-side? Maybe the FFmpeg scripts need updating?

[jwcullen]

Looking into it. May be a recent sever-side bug.

[Kurville]

Thanks

[Kurville]

Tried again with updated FFmpeg 8.0.1: didn't change anything.