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Jellygoose

02-28-2003 08:11 AM

Compressibility Of Movies?

Hi all...

I know of course the length of a movie and its aspect ratio (encoded pixels) determine the rate of compression for a movie. Also low action and dark movies are easier to compress.
But sometimes I can raise the CQ level for a high action movie which is longer than a low action movie higher than that one and I ask myself why...
What else is important for the compressibility of movies? it often seems strange to me that some movies are so hard to compress, because they are rather short (under 90 min.) and not high action at all, and I can't raise CQ level above let's say 62 for KVCDx3 544x576 and in other movies which are a lot longer I can go up to the 70s...
any ideas?

kwag	02-28-2003 10:17 AM

Re: Compressibility Of Movies...

Quote:

Originally Posted by Jellygoose

any ideas?

It probably has to do with the chroma and luma levels.
Have you tried one of those with the mergechroma and mergeluma :idea:

-kwag

Jellygoose

03-01-2003 06:14 AM

Yes I have. I think it is filter independent...
Hasn't anyone else had any problems to compress a specific movie yet?

TCC	03-01-2003 06:35 AM

I have :(

89min movie
KVCDx3 MPEG-1 528x480 template with prediction
Max CQ = 58.5 yielding a recommened sample size of 11.9MB
128kbps audio = ~83MB
GOP structure of 1-24-2-1-24
Q Matrix = KVCD Notch (Beta-1a)

Code:

LegalClip() 

GripCrop( width=528, height=480, overscan=2 ) 

GripSize(resizer="lanczosresize") 

mergechroma(blur(1.58)) 

mergeluma(blur(0.2)) 

SpaceDust() 

FluxSmooth(7,7) 

NoMoSmooth(40,1,6,1,3,false) 

Convolution3d(preset="movieHQ")

DctFilter(1,1,1,1,1,.5,.5,0) 

GripBorders() 

LegalClip()