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Old 16th July 2015, 13:01   #433  |  Link
r0lZ
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Quote:
Originally Posted by sneaker_ger View Post
x264 devs always said that CRF and 2pass are roughly equal and if anything CRF has the slight upper hand. (2pass algo has to do some slight adjustments over the course of the encode to hit target while CRF is "free")
It's what I have tried to explain above. Thanks for the confirmation.
Quote:
Originally Posted by sneaker_ger View Post
No, 6.55 fps is faster than 6.16 fps. Some work (frame type decision) is already done in first pass and the whole stats calculations should be negligible compared to that so second pass is supposed to be faster than CRF.
Yep. I have noticed my error, and modified my previous post while you were replying.
Quote:
Originally Posted by sneaker_ger View Post
Be careful when interpreting these values.
I agree that it's not easy. But normally, CRF 21.5 is always less good than CRF 20, right?
But I don't know if "Constant" in CRF is important. I wonder if the computed ratefactor during pass 1 is strictly equivalent to the CRF value in CRF mode?
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Last edited by r0lZ; 16th July 2015 at 13:03.
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