crop diagonally?

[chilledinsanity]

I'm trying to take 2 shots from the exact same scene, but crop the screen diagonal so that only part of it shows on top of the other. Can this be accompished in avisynth or virtualdub?

[Guest]

Your sig has a link to a site with illegal movie downloads. Remove it from your sig or you'll be struck.

[chilledinsanity]

How are these downloads illegal? I MAKE them! I wrote the script, animated the characters, did the mapping, voiced some of the characters, filmed it and edited it. I use a computer game engine to animate it, but showing game footage is not illegal.

[hanfrunz]

i don't know exactly if i understood what you want. You could use stackhorizontal(v1,v2) to stack two clips together. Then rotate it with a rotate-plugin (use search) and crop it.
Or you could draw a key mask (black=v1, white=v2) with photoshop/gimp and use some keyer-plugin (i think there is one...)

hanfrunz

[chilledinsanity]

It sounds like the latter is what I need, I'll have to research that, thanks.

[Guest]

How are these downloads illegal? I MAKE them! I wrote the script, animated the characters, did the mapping, voiced some of the characters, filmed it and edited it. I use a computer game engine to animate it, but showing game footage is not illegal. OK, sorry, I saw "episodes" and assumed they were TV things. My bad.

[chilledinsanity]

Hehe, that's fine. Actually my question here pertains to the new episode I'm currently working on since I'm hoping to overlay part of a scene on top of another recorded at the exact same angle to edit out a glitch I'm having.

[mikeytown2]

Using a rotated mask would be the best way to do this in my opinion.

Here's my hacked together version

a=BlankClip(199,640,640,color=$000000)
b=BlankClip(199,640,640,color=$FFFFFF)
StackHorizontal(a,b)
Spinner(angle=45,check=false,bg=false)
ZoomBox(640,480,align=5,zoomFactor=-100,SourcePAR=4.0/3.0)
masked=last

a=ColorBars().Trim(0,199)
b=a.invert()

Overlay(a,b,mask=masked)


http://avisynth.org/vcmohan/Spinner/Spinner.html - Spinner
http://forum.doom9.org/showthread.php?p=1111789#post1111789 - ZoomBox

[Didée]

No need to actually perform a rotation. A diagonal mask can be easily made with MaskTools v2a35.

Diagonal TopLeft--BottomRight mask:
mt_lutspa(true,"x y < 255 0 ?",U=3,V=3)

Diagonal BottomLeft--TopRight mask:
mt_lutspa(true,"x 1 y - < 255 0 ?",U=3,V=3)

If a soft boundary is needed, add a blur(1).

[mikeytown2]

@Didée
I get an Integer Overflow Error with your code.




http://manao4.free.fr/?M=D - MaskTools

[Didée]

You've to load mt_masktools-25.dll, not mt_masktools-26.dll.