shifting chroma channels...

[Fullasoul]

Hello,

I'm wondering if there is a plugin for Avisynth that will allow you to shift the chroma channels left/right/up/down. This is obviously a very common problem with VHS tapes, and I know there are a few Vdub plugins that handle this (the VHS plugin, for example)...but I'm wondering if there's any specifically for use in Avisynth?

Thanks!


Fullasoul

[mg262]

chromashift by Simon Walters, I think... just Google it.

[Wilbert]

I'm wondering if there is a plugin for Avisynth that will allow you to shift the chroma channels left/right/up/down.
Look for ChromaShift. See analog capture guide for more info.

edit: two responses within two minutes :)

[Leak]

I'm wondering if there is a plugin for Avisynth that will allow you to shift the chroma channels left/right/up/down. This is obviously a very common problem with VHS tapes, and I know there are a few Vdub plugins that handle this (the VHS plugin, for example)...but I'm wondering if there's any specifically for use in Avisynth?
MergeChroma(last.Cut(...).AddBorder(...))

np: Autechre - Bine (Confield)

[IanB]

For fractional shifting, abuse the resizer as a subpixel shifter.

MergeChroma(LanczosResize(Width(), Height(), xshift, yshift, Width(), Height())

-3.0 < (xshift, yshift) < 3.0

You can violate the edges by approx upto the order of the resizer, (BiLinear=1, BiCubic=2, Lanczos=3, Lanczos4=4), if you try to shift to far you will get a trap, so use Crop/AddBorder for the gross shift.