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Old 31st October 2003, 00:11   #6  |  Link
haibane
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Posts: 58
Quote:
Originally posted by karl_lillevold
@haibane: You can examine the 2-pass analysis file, and see what this new version chooses, but for less than full framerate animation I still suggest to use patternAdaptivity set to '1'. Leave scalingFactor alone, i.e. do not use it, unless you have found a setting that works much better than default, then please report this in the Undocumented RV9 tweaks thread. Thanks!
This is the first part of the analysis file...
I see "MaxBFrames = 3" in there, is this the what the codec suggests me to use on second pass?

My encode is an episode of an japanese animation, so even the codec suggest to use B-frame=3, i still should use B-frame=1?

// Video Stream
// Variable Bit Rate
Stream 0 ==============================
FileVersionNumber = 0;
Codec = RV40;
MaxBFrames = 3;
CodingMode = 0; (Video)
AvgBitrate = 485918;
MaxBitrate = 1835918;
MinQP = 1;
MaxQP = 31;
KeyFrameRate = 10000;
Scene 1 ------------------------------
StartTime = 0;
EndTime = 5297;
MinSuggestedQP = 3.38;
MaxSuggestedQP = 4.84;
NumBFrames = 3;
MaxSuggestedFrameTime = 162;
RPRSize = 0;
KeyFrameRate = 10000;
UpperTargetBitrate = 599458.500000;
LowerTargetBitrate = 455588.437500;
QP_Hat = 4.67;


Another question is that is there any explanation for the options in the analysis file?
such as what is a "RPRSize"?
What is the difference between MaxSuggestedQP and QP_Hat?
Does QP mean quantizers?



BTW, the first test i did shows great improvement over my previous encoding. Eventhough the background suffers much, but the scene transition and higher motion are much better now.
I have taken some shots here: http://www-personal.umich.edu/~liusu/compare/

the file named with apass(it's called a-pass because i was doing some blind testing with other people) has the following setting:

it is actually made with 1-pass vbr, because i feel the older 2-pass didn't give enough quality improvement to justify the extra time used.........

a-passs setting:
EHQ=90
custumpaketsize=16000
BF=1
scale=120
average bitrate=550kbps
max bitrate=1900kbps
audio= cook 64 kbps
max startup latency=60
other settings use default........

this one is encoded with the new 2-pass..
b-pass setting:
EHQ=90
custumpaketsize=16000
BF=auto
scale=auto
average bitrate=550kbps
max bitrate=1900kbps
audio= cook 64 kbps
max startup latency=60
other settings use default........

Last edited by haibane; 31st October 2003 at 00:26.
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