Quote:
Originally Posted by Kuningas
CRF mode is much more smarter then 2-pass mode.
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Nope, it isn't. Please stop spreading wrong information
Quote:
Originally Posted by Kuningas
CRF raises the quantizers in "fast" scenes where the loss won't be visible anyway and lower the quantizers in "slow" scenes.
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Correct, but applies to 2-Pass mode as well.
(Also you should say "blocks" instead of "scenes", now with MB-Tree rate-control being used)
Quote:
Originally Posted by Kuningas
While encoding in two pass average bitrate mode "high motion" scenes will get a significant higher bitrate than "static" scenes.
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Correct, but applies to CRF mode as well.
Quote:
Originally Posted by Kuningas
That's why pq cann't be equivalent.
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I guess you mean "CQP" (aka "constant quantizer"). And of course CQP cannot be equivalent to CRF/2-Pass. But CQP was never mentioned!
Example:
The upper one was encoded with 1-Pass CRF, the lower one was encoded as a "normal" 2-Pass:
(Note that both files have the
same total size, i.e. the
same average bitrate!)
You notice something regarding the bitrate distribution?
Upper: cabac=1 / ref=16 / deblock=1:-1:-1 / analyse=0x3:0x133 / me=umh / subme=10 / psy=1 / psy_rd=1.00:0.15 / mixed_ref=1 / me_range=24 / chroma_me=1 / trellis=2 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-3 / threads=6 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / constrained_intra=0 / bframes=8 / b_pyramid=2 / b_adapt=2 / b_bias=0 / direct=3 / weightb=1 / weightp=2 / keyint=750 / keyint_min=25 / scenecut=40 / intra_refresh=0 / rc_lookahead=60 / rc=crf / mbtree=1 / crf=24.0 / qcomp=0.60 / qpmin=10 / qpmax=51 / qpstep=4 / ip_ratio=1.40 / aq=2:1.00
Lower: cabac=1 / ref=16 / deblock=1:-1:-1 / analyse=0x3:0x133 / me=umh / subme=10 / psy=1 / psy_rd=1.00:0.15 / mixed_ref=1 / me_range=24 / chroma_me=1 / trellis=2 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-3 / threads=6 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / constrained_intra=0 / bframes=8 / b_pyramid=2 / b_adapt=2 / b_bias=0 / direct=3 / weightb=1 / weightp=2 / keyint=750 / keyint_min=25 / scenecut=40 / intra_refresh=0 / rc_lookahead=60 / rc=2pass / mbtree=1 / bitrate=284 / ratetol=1.0 / qcomp=0.60 / qpmin=10 / qpmax=51 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / ip_ratio=1.40 / aq=2:1.00