HandBrake

Macbook Pro 16
M3 Max 16/40
48 gigs ram
Plugged in, auto power mode

--software encoder--
Big Buck Bunny 4k --> Fast1080p30 - avg 144.8 fps
https://pastebin.com/md8znER7

Big Buck Bunny 4k --> H264 MKV 2160p60 4k - avg 63.42 fps
https://pastebin.com/xU6T6BG6

Big Buck Bunny 4k --> H265 MKV 2160p60 4k - avg 13.34 fps
https://pastebin.com/5sMnbezY


--VideoToolbox hardware encoder, quality preset, other settings the same--

Big Buck Bunny 4k --> Fast1080p30 - avg 190.47 fps
https://pastebin.com/yCNsSvAh

Big Buck Bunny 4k --> H264 MKV 2160p60 4k - avg 98.12 fps
https://pastebin.com/7bfBQyWv

Big Buck Bunny 4k --> H265 MKV 2160p60 4k - avg 106.47 fps
https://pastebin.com/8BU8W6BA