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  #1  
09-04-2003, 01:06 PM
jorel jorel is offline
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source:
Peter Pan(Disney)
4:3
29.970 fps
film
progressive

using this script from MovieStacker(overscan 2),
i got perfect aspect radio:

Undot()
Asharp(1,4)
BicubicResize(448, 448, 0, 0.6, 0, 0, 720, 480)
Deen()
DCTFilter(1,1,1,1,1,1,0.5,0)
AddBorders(16, 16, 16, 16)

but using this script with GripCrop,
i got wrong aspect radio with big black borders on top and botton


Undot()
Asharp(1,4)
GripCrop(480,480,overscan=2,source_anamorphic=fals e,dest_anamorphic=false)
GripSize(resizer="BiCubicResize")
Deen()
DCTFilter(1,1,1,1,1,1,0.5,0)
GripBorders()

and without overscan i got the same borders on the top and botton too.


any help please?
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  #2  
09-04-2003, 01:53 PM
kwag kwag is offline
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Always preview your movie, and if the results are wrong with GripFit, use AviSynth's resize
If you want to be 100% correct every time, then use AviSynth's resize

-kwag
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  #3  
09-04-2003, 01:58 PM
jorel jorel is offline
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ok yes Kwag,
i did little samples not the full movie!


is the first time that i see wrong aspect radio with GripCrop!
...very strange.

thanks for the hints !
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  #4  
09-04-2003, 03:41 PM
jorel jorel is offline
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i re did the scripts and encode using the
scripts again with and without overscan!


just the same...
using GripCrop is anamorphic and give big black borders in the top and botton.

it's a bug, problem or "don't know what"?
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  #5  
09-04-2003, 03:41 PM
Dialhot Dialhot is offline
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Other thing : if you want to use bicubic precise (b=.6, c=0) as you in your example, you must use avisynth resizing. Gripcrop always uses bicubic standard (b=c=1/3).
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  #6  
09-04-2003, 03:51 PM
jorel jorel is offline
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Quote:
Originally Posted by Dialhot
Other thing : if you want to use bicubic precise (b=.6, c=0) as you in your example, you lust use avisynth resizing. Gripcrop always uses bicubic standard (b=c=1/3).
lust?
this is not a girl Phil!


i got the same problem with the dvd2svcd script!

i did another sample with bicubic standard too:

Undot()
Asharp(1,4)
BicubicResize(448, 448, 1/3, 1/3, 0, 0, 720, 480)
Deen()
DCTFilter(1,1,1,1,1,1,0.5,0)
AddBorders(16, 16, 16, 16)

the result is ok,the same like bicubic precision!
any recomendations Phil
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  #7  
09-04-2003, 03:57 PM
Dialhot Dialhot is offline
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Quote:
Originally Posted by jorel
Quote:
Originally Posted by Dialhot
Other thing : if you want to use bicubic precise (b=.6, c=0) as you in your example, you lust use avisynth resizing. Gripcrop always uses bicubic standard (b=c=1/3).
lust?
this is not a girl Phil!
Lol. I'd edited my post (but too late ).

Quote:
BicubicResize(448, 448, 1/3, 1/3, 0, 0, 720, 480)

the result is ok,the same like bicubic precision!
any recomendations Phil
No they are not. Bicubic precise is a lot sharper than normal. You can see that with the file length of a sample using same CQ for both : the one with bicubic precise will be bigger.

Note: Lanczos is often compared to a bicubic with b=0.75 or even b=1 !
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  #8  
09-04-2003, 04:06 PM
jorel jorel is offline
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too late...lol!

oh,ok,ok...but
differents things and problems:

using (any) bicubic the aspect radio is perfect,
using GripCrop the aspect radio is wrong with black borders,
with lanczos the aspect radio is perfect but give
"strange artefacts in the edges"...
the edges seems "moving ants" with extreme bright.


more recomendations and hints please Phil!

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  #9  
09-04-2003, 04:19 PM
kwag kwag is offline
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Quote:
Originally Posted by jorel
with lanczos the aspect radio is perfect but give
"strange artefacts in the edges"...
the edges seems "moving ants" with extreme bright.
That's exactly why I always use Bicubic Precise

-kwag
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  #10  
09-04-2003, 05:04 PM
Dialhot Dialhot is offline
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Taken alone, that's true, Lanczos does too much sharpening.

But the problem is not the same with other filters. Light blur + Lanzos (my Divx script for instance) is in my eye a lot better than asharp + bicubic (MA script).

A resizer sharpen only the edges. Asharp sharpens everything, included possible remaining noise. That's a part of the difference.

In fact I have to say that I never use any sharpening filter
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  #11  
09-04-2003, 05:10 PM
jorel jorel is offline
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let me test your idea Phil.
<EDITED>
i did using:

Undot()
LanczosResize(448,448,0,0,720,480)
Deen()
DCTFilter(1,1,1,1,1,1,0.5,0)
AddBorders(16, 16, 16, 16)

and compare the quality with the others scripts:

with lanczos without asharp is really good too but
i see just a (little) few more details with bicubic/asharp...
seems more "dimentional" too...can't explain better.
deserve more tests cos i did with Peter Pan (Disney),
like all samples with scripts used in this tests.
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  #12  
09-05-2003, 09:56 AM
Dialhot Dialhot is offline
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Quote:
Originally Posted by jorel
deserve more tests cos i did with Peter Pan (Disney),
like all samples with scripts used in this tests.
A classic cartoon is not the perfect choice for a sample. I do all mine with a short (5 minutes) making-off of Star Trek Insurrection : explosion, battle action, computer generated scenes... That's a really good test sample
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  #13  
09-05-2003, 11:11 AM
jorel jorel is offline
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thanks Phil,
i will test now with "real" movies from dvds, not cartoons!

and like i wrote, the differences are tiny(really tiny),
Lanczos without "sharpens" is very good
and give short final size too

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