Averaging multiple video captures?

[bani]

I've made multiple captures of a broadcast off cable.

I would like to average them together to get noise reduction.

Any way to do this with virtualdub? Any standalone apps to do this?

[snowmoon]

I believe something could be done using avisynth. If it's not part of avisynth already it could easly be added. The problem that I see is aligning each of the signals perfectly to account for...

1) pixel shift
2) dropped frames on your end
3) commercials
4) ...

http://www.avisynth.org/

[bani]

1) maybe. we'll see.
2) 0 dropped frames, this is DV capture.
3) already trimmed out.
4) 8)

i recall seeing some averaging app on a japanese site, but i can't find the url again... buried under 1000's of bookmarks

i was hoping someone would know offhand...

[RoopeT]

This can be done with avisynth. To get more information about how to do it, go to www.doom9.org forum, avisynth section and search for "Averaging two analog captures for noise reduction"

Basicly it goes like this:

clip1=AVISource("F:\video1.avi")
clip2=AVISource("F:\video2.avi")
clip3=Layer(clip1,clip2,"add",128,0,0,use_chroma=t rue)
Return(clip3)