Shared functions/DeKafka

From Avisynth

As outlined at my own wiki, this fairly simple filter washes away those annoying bugs from broadcast clips.

Note this "new and improved" version works seamlessly (literally) with any format, but there will be a RGB32 conversion.

function dekafka(clip clip, int Xstart, int Ystart, int X, int Y, int Amount)
{
  ytop = Ystart
  ybot = Ystart + Y
  xleft = Xstart
  xright = Xstart + X
  topline = clip.Crop(Xstart, ytop-2, X, 2)
  bottomline = clip.Crop(Xstart, ybot, X, 2)
  leftline = clip.Crop(xleft-2, ytop-2, 2, Y)
  rightline = clip.Crop(xright, ytop-2, 2, Y)
  logosrc_hor = StackVertical(topline, bottomline).Blur(0, 1.58).BilinearResize(X, Y)
  logosrc_ver = StackHorizontal(leftline, rightline).Blur(1.58, 0).BilinearResize(X, Y)
  Amount2 = (Y>=2*X) ? 255 : 128*Y/X
  # Amount2 is small if X >> Y => logoscr_hor is dominant
  logosrc = Layer(logosrc_hor, logosrc_ver, "add", Amount2)
  clip = clip.Layer(logosrc, "add", Amount, Xstart, Ystart)
  return clip
}

You must provide both a source and a mask. if you don't care about a mask I suppose you can change the code, but why would you want to replace an ugly logo with an even more ugly blurred box? ;)

clip = clip.dekafka(maskclip,Xpos,Ypos,Width,Height,Amount)

Guaranteed to be the fastest logo remover in the county!