SOLVED: Failed to transcode to HEVC on mac mini

[gnattu]

Your system complained about that it does not find an hardware encoder. Most likely you are using an x86 ffmpeg and programs running with rosetta will have problems find the correct VT encoder.

You can use file $(which ffmpeg) in console to see if it is the case.

For now, your best option is to install homebrew via https://brew.sh, and use brew install ffmpeg to use their ffmpeg instead. Theirs will have correct hardware acceleration behavior.