[varenc]

That’s definitely possible, but you won’t be able to do this in real time without more GPU power. And the frame interpolation techniques might not work as well on a desktop recording.

If you can record and process later, you might try recording your desktop in a more raw format. It’ll be very large on disk, but this avoids the need to transcode the recording in real time and strain your GPU/CPU. In ffmpeg just use `-c:v copy` to capture it raw. (Assuming the transcoding is the main limiting factor)