View Full Version : FPS-based ratecontrol on 2pass?
parent5446
3rd January 2012, 22:09
So according to this: http://git.videolan.org/?p=x264.git;a=commit;h=22bfd310abced4df0b11c9620b152e5cfe746d43
When using CRF the FPS of the video is taken into account. Will 2pass (and other modes) take this into account as well or does this only apply to CRF mode?
Blue_MiSfit
3rd January 2012, 22:16
When using CRF the FPS of the video is taken into account
That's not how I read the post. I read it as saying that rate control in general is VFR aware.
CRF is affected by this, but it's not the only rate control method capable of VFR. I could be wrong, but I think this is accurate.
Derek
parent5446
3rd January 2012, 22:50
I don't doubt that I probably misunderstood the commit message. Unfortunately I cannot find any resources that explain video encoding. I still have no idea what an MB-tree or VFR is, and not for lack of trying.
sneaker_ger
3rd January 2012, 23:04
VFR (http://avisynth.org/mediawiki/VFR)
MB-tree (http://forum.doom9.org/showthread.php?p=1310980) (scroll down to the FAQ:"What does it actually do?")
I agree with Blue_MiSfit, x264's bitrate distribution is VFR-aware in all modes IIRC, not just CRF.
Dark Shikari
3rd January 2012, 23:05
All ratecontrol modes consider the frame duration in their calculations.
parent5446
3rd January 2012, 23:10
All ratecontrol modes consider the frame duration in their calculations.
Kk. Thanks.
(And thanks for the resources.)
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