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Old 19th November 2018, 11:41   #1  |  Link
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Join Date: Feb 2003
Location: Palmcoast of Norway
Posts: 357
CRF question

hi! Ive been doing alot of test encodes on CRF lately and i find it using way to low bitrate on average than i would prefer..
My principle behind the encoding has been the focus is quality, but not waste bits thats not needed given a quality level (like static VBR will do).

CRF22, for me is a bit low quality on some titles (prores source), and even CRF20 looks a bit daft and triggers a 2-3mbps avg bitrate..
But on noisy sources the bitrate like spikes to like 20-30mbps...

The strange thing is the VMAF scores are like 98-99 in average and some dips into the sub 95s..

So the question is: anyone know if its possible to tune CRF against non-noise focused PQ?
Or should i just offset it all down to a lower CRF value and cap it ?
Like CRF18 with a 15mbps cap ?

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