Did this issue never get resolved by Apple for M1 Pro, M1 Max, and M1 Ultra chips, and why is the M1 and M2 so much faster with Hardware Accelerated Apple H.264 ? I then tried and Export with Hardware Accelerated Apple H.264 turned on my Mac Studio M1 Ultra with 128GB RAM and 4TB SSD drive, on the same hour long 1080P video file, with much slower (maybe 10-20X slower) Hardware Encode speeds. I tried the H.264 Hardware Encoding (Hardware Accelerated Apple H.264 option) on a one hour 1080P, 30 fps video, with Hardware Accelerated Apple H.264 option turned on in Screenflow, and it ripped very fast through the encode, faster than I remember the M1 Mac Mini with Hardware Accelerated Apple H.264 turned on. Since then, I have just upgraded to a new Mac Mini M2 computer (8GB RAM, 256GB SSD drive) that just came out this week, running Screenflow 10.0.8 and the latest macos Ventura version.

In and old thread over a year ago on this forum, it was said that Screenflow's H.264 Hardware Encoding option on Export was much slower on M1 Pro and M1 Max chip Macs, but H.264 Hardware Encoding (Hardware Accelerated Apple H.264 CODEC) was not slower on M1 chip Macs, and the issue had been determined to be Apple's, and you were waiting on a fix.

Handbrake for mac m1