6th September 2015, 09:00
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#16
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Join Date: Mar 2006
Location: Barcelona
Posts: 5,034
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Quote:
Originally Posted by feisty2
Constant quality = qp != crf
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Have a look here
Quote:
crf
Default: Not Set
The final ratecontrol method: Constant Ratefactor. While qp targets a certain quantizer, and bitrate targets a certain filesize, crf targets a certain 'quality'. The idea is for crf n to give the same perceptual quality as qp n, just in a smaller space. It is not extremely exact, but reasonably close (and will average out to be accurate over a large number of videos).
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