Quantcast Sansgrip Filters: Manually Adjust for Overscan ? - digitalFAQ.com Forums [Archives]
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05-12-2003, 04:20 PM
phibertron phibertron is offline
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Being the control freak that I am,
and that I am having issues the GripFit

The issue with it is that it is not centering correctly,
unless I use Nicks MpegDec, then it works fine

I did some fooling with overscan and resizeing,
and a little cause and effect on a source of 2.35/1 16x9

I am either correct or incorrect about a vcd, svcd, dvd
getting stretched or shrunk to 640x480 for a 4x3 aspect display

What do you think ?

Thanks
-Phibertron

Example:

Mpeg2Source("test.d2v")

Crop(0, 60, 0, -60)

### overscan of 0, ends up as 640x272

BilinearResize(480, 272)
AddBorders( 0, 104, 0, 104)


### overscan of 16, ends up as 620 264

BilinearResize(464, 264)
AddBorders( 8, 108, 8, 10


### overscan of 32, ends up as 600 256

BilinearResize(448, 256)
AddBorders( 16, 112, 16, 112)
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  #2  
05-13-2003, 12:09 PM
phibertron phibertron is offline
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After doing some more reading and testing

I dont think that I am going to deal with the resizeing the aspect ratio
to compensate for the overscan settings

It seems to be a better choice to resize as normal
and to just letterbox to gain compression

Letterbox( 0, 0, 8, 8 ), Letterbox( 0, 0, 16, 16), etc

I would rather gain compression from letterbox
than lose imagery by compensating for aspect ratio because of overscan

-phibertron
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