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As of macOS Big Sur, you can Export videos from QuickTime (i.e. the screen recording) in H.265, and it's faster than converting it via ffmpeg as it can leverage
by minimaxir 6y ago
As of macOS Big Sur, you can Export videos from QuickTime (i.e. the screen recording) in H.265, and it's faster than converting it via ffmpeg as it can leverage the GPU via VideoToolbox.
...but you still have to record-and-save it in H.264 first then reload into QuickTime, and for some reason the H.265 quality isn't great. This is still the case even when using GPU VideoToolbox via ffmpeg/Handbrake, and it's something I've never figured out why.
As an aside, for more serious recordings (and if you don't want to use paid software), I recommend using OBS instead, as it gives you a lot more recording flexibility that the native macOS screen recorder lacks.