18th June 2018, 22:34
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#11
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Guest
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There is a bug with YV12 sources I see from the Avisynth wiki page. Maybe this can help you?
Quote:
Originally Posted by raffriff42
Has anybody used WarpedResize [with a YV12 source] lately? For me it is warping Chroma from one side instead of centered like Luma, which looks a bit odd:
Code:
LoadPlugin(p + "SimpleResize\Avisynth_2.5_Alpha\SimpleResize.dll")
ColorBars(pixel_type="YV12")
Subtitle("5 4 3 2 1 0 1 2 3 4 5",
\ align=5, size=Height*0.2, font="Courier New",
\ text_color=$aaffffff, halo_color=$ff000000)
WarpedResize(Width, Height, 1.5, 1.0)
Subtitle("WarpedResize(hWarp=1.5)", align=8,
\ text_color=$ebebeb, halo_color=$ff000000)
return Last
...but this fixes the problem:
Code:
## fix WarpedResize YV12 chroma bug; make warp arguments optional
function WarpedResize2(clip C, int width, int height, float "hWarp", float "vWarp")
{
Assert(C.IsYV12,
\ "WarpedResize2: source must be YV12")
Assert(width % 4 == 0,
\ "WarpedResize2: 'width' arg must be mod 4")
Assert(height % 4 == 0,
\ "WarpedResize2: 'height' arg must be mod 4")
hWarp = Default(hWarp, 1.0)
vWarp = Default(vWarp, 1.0)
U = C.UToY .WarpedResize(width / 2, height / 2, hWarp, vWarp)
V = C.VToY .WarpedResize(width / 2, height / 2, hWarp, vWarp)
Y = C .WarpedResize(width, height, hWarp, vWarp)
return YToUV(U, V, Y)
}
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Last edited by amichaelt; 18th June 2018 at 22:38.
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