I'm stumbling through this without a lot of technical knowledge when it comes to video. Sorry if this is a vague or simplistic question. How can I use it in a way that would be analogous to the standard RF settings (18, 20, 22) on the software encoder? Another advantage of using GPU for the encoding is that you can use Filter with nearly no speed loss - as the filters run on the CPU while the encoding takes place on the GPU cores. I'd love to get some idea of how to use it, and what's actually changing when I move it around. I just tried with the The Batman 4k Trailer here on my MacBook 16' with M1 Pro 10 Core and got 18fps encoding speed in h265 10 Bit with GPU acceleration. I found another conversation on another forum from a couple months ago that pointed out that this slider was grayed out on Intel Macs, but I haven't found any clear discussion about how it actually functions. HandBrake's popular-level VideoToolbox documentation seems pretty thin, and doesn't reference this slider. It's in the same place that the RF slider would be in if you were using the software encoder, but it's labeled CQ instead of RF, and the numbers on the slider seem to operate at a different scale. When doing an MKV/h.264 encode using the VideoToolbox encoder and selecting Constant Quality, there's a slider available that wasn't available on earlier versions on Intel-powered Macs (or, as far as I can remember, the Windows version of Handbrake, but I could be mistaken there). I tested GPU-accelerated video encoding on M1 Mac Mini (H.264 VideoToolBox) in Handbrake Beta and constant quality mode (new feature for M1 Macs, it works like -crf in libx264). I've been trying out the version of Handbrake that's built for native compatibility with Apple's M1 SoC.
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