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You can find examples of v360 filtering (and much more) in:
FFmpeg_Book.pdf
by Michael Koch, astroelectronic@t-online.de, scripts are PC based, but mostly easy to adapt.
The commands are in PC/DOS form, so for Mac (and Linux) I make them one-liners and if they don't work, I enclose the filter part (after the -vf) in double quotes "". That works most of the time. To translate the PC batch files to shell scripts this resource helps: https://tldp.org/LDP/abs/html/dosbatch.html

And I find this free ffmpeg course to be valuable:
slhck.info/ffmpeg-encoding-course

In ffmpeg (in stereo was where I found it), there is a frame size limit of ≈16000x16000 px over/under (or 32000x8000 side/side). I tried to work with 16384x16384 and it failed.

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