I am attempting to screencast using ffmpeg on my PC, but I have one problem: it uses too much CPU, even using `-crf=0`. Does anyone know how I can reduce this, either using a REALLY lossy format or using my Radeon RX 480? Even if it's not that efficient on my GPU, at least it will take some load off my Intel Core 2 Quad Q9450...

Also, for some reason using `-hwaccel auto` still uses CPU. Have I compiled it wrong? Or does it really need to use 100% of it...
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