Convert Youtube 360 (EAC) to Equirectangular

Youtube uses cubic projection for its videos, but most other things, like VR headsets, natively use equirectangular. Yes, there are players that will play either, but I am shooting for the native format of my Apple Vision Pro.

A quick way to convert them is with ffmpeg. You can tune the parameters to your liking, but the “v360=eac:equirect” is the filter that works the magic.

ffmpeg -y -i input.mp4 -vf "v360=eac:equirect" -c:a copy -c:v hevc_videotoolbox -q:v 52 -tag:v hvc1 output.mp4

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