Quantcast Avisynth: Unfilter Tweak? - digitalFAQ.com Forums [Archives]
  #1  
05-07-2003, 08:53 PM
ovg64 ovg64 is offline
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I read some where in this forum that a negative unfilter value would give compression to a file ,...well they sure were right.

LegalClip()
GripCrop(528, 480, overscan=2)
GripSize(resizer="BicubicResize")
UnFilter(50, 50)
TemporalSmoother(1, 2)
MergeChroma(blur(1.5)
MergeLuma(blur(0.2))
GripBorders()

Tok prediction with this script 63.15% CQ.

LegalClip()
GripCrop(528, 480, overscan=2)
GripSize(resizer="BicubicResize")
UnFilter(-30,-30)
UnFilter(50, 50)
TemporalSmoother(1, 2)
MergeChroma(blur(1.5)
MergeLuma(blur(0.2))
GripBorders()

Tok prediction with this script 70.39% CQ.

notice a 7% CQ gain with the second script, still a pretty sharp image.
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  #2  
05-07-2003, 09:32 PM
CheronAph CheronAph is offline
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I´ll try that too when I get off from work!
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  #3  
05-07-2003, 09:45 PM
muaddib muaddib is offline
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The image could be sharp... but what about the details?
Are they still there?
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  #4  
05-07-2003, 10:32 PM
ovg64 ovg64 is offline
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Detail looks just find to me Muaddib, but only you can answer your owen
Remember this is only a test.
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  #5  
05-07-2003, 10:56 PM
jorel jorel is offline
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ovg64, muaddib, CheronAph


like i posted after do 6 hours of tests...
"only my opinion...
maybe with unfilter 30,30 will be good
and is needed less time/less final size too!"

here:
http://www.kvcd.net/forum/viewtopic....6ac4153de10073

and is my opinion here too.
unfilter for me is the very best filter!
in the same day that trBarry post about unfilter,
i download the version of dvd2svcd (d2s110b1pre22unfilter)
in july-30-02,and all encodes are using this filter.
you got time if adjust to 30,30 or 25,25 like in MovieStacker,
the result will be fastest and
with just a few visual differences from this script!
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  #6  
05-08-2003, 01:02 PM
CheronAph CheronAph is offline
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I got the same results, about 10% more CQ with negative unfilter!
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  #7  
05-08-2003, 02:06 PM
dazedconfused dazedconfused is offline
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Yes, but Kwag's whole point of using Unfilter(50, 50) within the Optimal Script was to first oversharpen the picture before the subsequent MergeChroma/Luma lines blur the picture later on. I believe Kwag referred to it as a "psycho-visual" effect....basically meaning that it gave us some extra compression while at the same time, maintaining a good sharp picture to the naked eye.

If you decide to use negative Unfilter values, then you'll probably need to also lower your MergeChroma/Luma(blur) values or drop them completely (so you probably won't really be gaining any compression in the long run). If you can tolerate a blurrier picture, then use lower (or negative) Unfilter values and/or higher MergeLuma/Chroma values until your eyes can notice the difference....afterall, beauty is in the eye of the beholder! You'll gain compression, but probably sacrifice some picture-quality (sharpness). Personally, I think the current Optimal Script works and looks great as it is, so I try not to stray from it (by making changes or adding more filters) unless I absolutely have to.

-d&c
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  #8  
05-08-2003, 03:18 PM
Wolfi Wolfi is offline
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I think I gonna stay with Kwags script, for now. I encoded a 90min movie, KVCDx3 544x480, and put it on a 80min cd-r, the result was fantastic

//Wolfi
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  #9  
05-08-2003, 04:17 PM
kwag kwag is offline
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Quote:
Originally Posted by dazed&confused
Yes, but Kwag's whole point of using Unfilter(50, 50) within the Optimal Script was to first oversharpen the picture before the subsequent MergeChroma/Luma lines blur the picture later on.
Yes. And said another way: "You can trim long hair to make it short, but you can't trim a balled head that doesn't have any hair"
I guess you get the point
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  #10  
05-08-2003, 05:34 PM
ovg64 ovg64 is offline
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Yes Kwag i think thats what we are doing anyway trimming a bald headed and making him look better the best way we can until we get a filter to gain CQ will keep doing anorthodox things around here, see the other guys they still not happy they want more

Thanks 4 ur opinion we'll keep trying
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