I'm given to understand that, under the hood, two-pass and CRF are the
same thing, just that two-pass calculates the necessary CRF to get the
desired filesize. Is this correct? And if so, is it possible to see what
CRF was selected in the two-pass encoding? I'm experimenting with
encoding two versions of a video, one at a higher resolution than the
other, and I'm curious if I could encode the high-res one with two-pass,
then somehow encode the low-res one with the same CRF. (I already
figured out that naively dividing the filesize by some amount for a
second two-pass encode isn't going to work.)
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