CRF vs VBR&Dual Pass

jmc

Active member
#1
Been reading too many articles.
Seems like CRF is felt to be better for quality then VBR/dual pass.

CRF changes bitrate to match what is happening in the frame.

Well, that is exactly what I thought VBR did!...changing the bitrate to match what is happening in the video.

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EDIT----Also found this...

CRF and 2-pass use identical bit allocation algorithms.
All 2-pass does is pick the CRF value that gives the filesize you want.
It's still using the CRF algorithm.
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If this is correct (that VBR uses CRF) then I'll stay with my current "VBR/DualPass @1.3Mbps" system
I want my dvd.mpg files to be 25 to 33% of their previous size after X264.

All the info I find seems to be about ffmpeg which is what I believe VRD uses.


Thoughts very welcome!
jmc
 
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