Quantcast KVCD: Uncompressable Movies?? - digitalFAQ.com Forums [Archives]
  #1  
07-17-2003, 10:17 PM
AgNa AgNa is offline
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Well I made quite a few KVCDS for a while and I never noticed what happened to me with my last to movies (AVI sources) Both movies are ~90mins so they usually fit`s wonderfull in 704x480 or better in 480x480 when to much action. Now this 2 movies I made are not to much action and for the first 1 I used AVS 2.07 and the 2nd 2.5.2. And The last one I can only get 62,8 CQ?? with 2200Max 150Min bitrate. For the previous one was even worst since I have to move to 352x480 to get 69CQ. What can be wrong? this are the 2 scripts I used

Code:
viSource("D:\Movies-videos\test\evildead3.avi")
LegalClip() 
GripCrop( 480, 480, overscan=2 ) 
GripSize(resizer="BicubicResize") 
STMedianFilter(8, 32, 0, 0, 8, 32) 
# SpaceDust() # Optional - for some "not so clean" DVDs. 
unfilter(30,30)
Blockbuster(method="noise", variance=.5, seed=1)
temporalsmoother(1,2) 
##mergechroma(blur(1.50)) 
##mergeluma(blur(0.2)) 
# Convolution3d or DCTFilter for extreme worse cases. 
GripBorders()
TextSub("D:\Movies-videos\hero480.ssa") 
##AssumeFPS(23.976)
LegalClip()
Sampler(length=24)
Code:
## DLL Section ## 
# 
LoadPlugin("D:\Movies-videos\Codecs2.5\MPEG2Dec3.dll") 
LoadPlugin("D:\Movies-videos\Codecs2.5\GripFit_YV12.dll") 
LoadPlugin("D:\Movies-videos\Codecs2.5\STMedianFilter.dll") 
LoadPlugin("D:\Movies-videos\Codecs2.5\asharp.dll") 
LoadPlugin("D:\Movies-videos\Codecs2.5\unfilter.dll") 
LoadPlugin("D:\Movies-videos\Codecs2.5\undot.dll") 
LoadPlugin("D:\Movies-videos\codecs2.5\Sampler-2.5.dll")
LoadPlugin("D:\Movies-videos\codecs2.5\VSFilter.dll")
# 
#### 

## Defined Variables and Constants ## 
# 
MaxTreshold = 1.50 
nf =  0 # Current frame. 
# 
#### 

## Main section and static filters ### 
# 
AviSource("D:\Movies-videos\test\spun.avi") 
# 
undot() 
Limiter() 
asharp(1, 4) 
##BilinearResize(448,352,22,0,596,352)
##AddBorders(16,64,16,64)
GripCrop(480, 480, overscan=2) 
GripSize(resizer="BicubicResize") 
STMedianFilter(8, 32, 0, 0 ) 
MergeChroma(blur(MaxTreshold)) 
MergeLuma(blur(0.1)) 
# 
# 

## Linear Motion Adaptive Filtering ## 
# 
# ( Portions from AviSynth's manual ) - This will apply temporalsoften to 
# very static scenes, and apply variable blur on moving scenes. 
# We also assign a variable - and this is why a line break is inserted: 

SwitchThreshold = (Width<=352) ? 4 : (Width<=480) ? 3 : 2 
ScriptClip("nf = YDifferenceToNext()"+chr(13)+ "nf >= SwitchThreshold ? \ 
unfilter( -(fmin(round(nf)*2, 100)), -(fmin(round(nf)*2, 100)) ) : \ 
TemporalSoften( fmin( round(2/nf), 6), round(1/nf) , round(3/nf) , 1, 1) ") 

# 
# 
# 

GripBorders() 
#LetterBox( Your_Values_Here ) # Depends on situation. Use MovieStacker! 
##AssumeFPS(23.976)
TextSub("D:\Movies-videos\test\Spun.ssa")
Limiter() 
Sampler(length=24)
# 
# 
## Functions ### 

function fmin( int f1, int f2) { 
  return ( f1<f2 ) ? f1 : f2 
} 

# 
####
Any tips?
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Someday, 12:01 PM
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  #2  
07-17-2003, 11:07 PM
kinggee kinggee is offline
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i have had similar problems with movies that will not compress

it is basically because some movies just don't because of a lot of things like brightness, amount of action and how clean the source is.

i wouldn't worry about it, i don't think anything is wrong
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  #3  
07-17-2003, 11:13 PM
kwag kwag is offline
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Guys,

Tale a look at my post #7 here: http://www.kvcd.net/forum/viewtopic.php?t=4964&start=32

Try to calculate your CQ again, and see if you get a different number

-kwag
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  #4  
07-17-2003, 11:21 PM
kinggee kinggee is offline
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wow this looks promising

off to test now
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  #5  
07-17-2003, 11:35 PM
kinggee kinggee is offline
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sorry to be an idiot, but where in movie stacker do i find the average bit rate
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  #6  
07-17-2003, 11:39 PM
kwag kwag is offline
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Quote:
Originally Posted by kinggee
but where in movie stacker do i find the average bit rate
Under the "Video Stream" frame, on the "Resize & Video Stream" tab

-kwag
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  #7  
07-17-2003, 11:41 PM
kinggee kinggee is offline
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ahh i see it - 873, that sounds about right

many thanks
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  #8  
07-17-2003, 11:43 PM
jorel jorel is offline
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Quote:
Originally Posted by kinggee
sorry to be an idiot, but where in movie stacker do i find the average bit rate
it's not an idiot question my friend

is in the bottom of the "resize and video stream" tab
in the "video stream" (in dark blue color)



editing:
:P
oops, i answer in slow motion,
the "faster double click" came faster!
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  #9  
07-17-2003, 11:43 PM
kwag kwag is offline
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Quote:
Originally Posted by kinggee
ahh i see it - 873, that sounds about right

many thanks
873 - 43% = 497.61
So set your MIN to that ( or 498 in ToK, because ToK doesn't allow decimals )


-kwag
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  #10  
07-18-2003, 12:17 AM
AgNa AgNa is offline
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Well thanx for the tip I`m gonna try it tomorrow after all I`m just 1,5 hs away of finishing the encoding, so I`m gonna compare betterif I let it finish.
But isn`t 2000Kbs to low? I mean what about action movies?
My problem wasn`t about acurate in the prediction ony low CQ, but I will cheq further tomorrow it`s to late now and I need some sleep
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  #11  
07-18-2003, 12:29 AM
kwag kwag is offline
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Quote:
Originally Posted by AgNa
But isn`t 2000Kbs to low? I mean what about action movies?
Play it http://www.kvcd.net/boon-action.mpg

-kwag
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  #12  
07-18-2003, 03:32 PM
AgNa AgNa is offline
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Well I gave it a try this morning and it truned down my CQ by 1,5 points I wasn`t totally happy with the result so I went for another full encode at 352x480 (200min, 2200Max) and I got 9 more points in CQ. So I think It`s gonna look better. Maybe I`m gonna do some test using your method Kwang but I don`t like the results when lowering the bitrate so much, your sample looks good but not so good as others KVCDs I saw. So for now, and until another better method arrives, I`m gonna keep lowering to 352x480 in this kind of movies, or just going for 2 cd`s when the movie deserves it
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  #13  
07-18-2003, 04:30 PM
kwag kwag is offline
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Of course you had more points That's because you increased the distance from the MIN to the MAX, and the encoder has to compensate for the loss of dynamic range It now has a larger bitrate swing to take care of.
The CQ is only a reference, and you can't rely on the value. That's why you got a lower CQ with a MAX of 2,000. But quality wise, it will be better than with the higher CQ and larger MIN, MAX
That is, referenced to a same file size on both encodes.

-kwag
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  #14  
07-18-2003, 04:38 PM
AgNa AgNa is offline
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well maybe I didn`t explain my self to clear or I didn`t understand you totally

A) 480x480 - 2200max - 150 min = 62.7 CQ
B) 480x480 - 2000max - 422.69min = 61 CQ
C) 352x480 2200max -200 min = 71 CQ
D) 352x480 2000max - 422.69min = 69CQ

That`s why I decided to go for C
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  #15  
07-18-2003, 04:48 PM
kwag kwag is offline
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Take a look at your D sample. It should be better than your C sample
Also, B will be better than A.

-kwag
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