Blur small section of video

[zakman]

I would like to blur just a small area of my video, say 30 by 30 pixels in the middle of the video. My source file is mpg, but I could always convert. I am thinking of using avisynth or vdub, but I am fairly new to both. I like vdub because it has an easy way to preview. Most filters I see are made to affect the entire video, not just a portion. How do I make them work over just part of the video?

[Island Buoy]

google "logoaway"

[AlanHK]

The VirtualDub LogoAway filter can do this.
See http://forum.videohelp.com/topic320220.html

In Avisynth you can do this using Overlays
Get the AvsP editor for previews.

[manono]

Yeah, I do it using Overlay in AviSynth. A sample script might go:

A=MPEG2Source("C:\Path\To\Movie.d2v")
B=A.Crop(52,36,-488,-412)#crop down to the place you want to blur
B=B.MedianBlur(6)#or your favorite blur filter
Overlay(A,B,X=52,Y=36)

[zakman]

Thank you! The "overlay" was exactly what I was looking for.