dBpoweramp Video now runs natively on new Macs with ARM ("Apple Silicon") processors.
There's no need to update the app itself; "Install FFmpeg automatically" now fetches new build of FFmpeg 4.3.1 with Intel+ARM code.
Encoding performance of x264 is over two times faster than emulated code, on the Developer Transition Kit machine.
There are still some performance issues with x265 due to x265 not supporting the new platform properly yet; an updated version will be out once issues in x265 are fixed.