How do I take 4 video clips and put onto one screen?

[OM2]

Can someone tell me how to take 4 video clips, make each of them be a 1/4 size and have each clip play in one corner of of the screen.

AND, this might sound dumb, but: do I have to take into consideration how much stuff I have moving?
(i.e. because some players will struggle to play that much on screen all at once???)

Any replies would be appreciated.

Thanks.


OM

[gadgetguy]

I would use Avisynth using the Lanczos4Resize, StackVertical, and StackHorizontal commands.

[edDV]

Live or as an edit?

For live what you want is a "quad split". I'd start with Extron for dedicated hardware.

If edit, most programs will allow you to build the effect in four passes.

[OM2]

thanks for the replies.
can i use vitrualdubmod?

live????
wow... that sounds kewl.
but... would that be only for professional tv channels?
what else? cctv?? if cctv... doesn'tt hat mean a lot of programming to interface witht he cameras...?

[edDV]

thanks for the replies.
can i use vitrualdubmod?

live????
wow... that sounds kewl.
but... would that be only for professional tv channels?
what else? cctv?? if cctv... doesn'tt hat mean a lot of programming to interface witht he cameras...?

It would be a box that takes four live inputs and outputs what you want. In theory, a PC card could do this and probably is available in the security market. They even make VCRs that record four cameras in quad split.

[gadgetguy]

I don't think there's a way to do it in VDubMod. As far as I know VDub doesn't allow for parallel clips, but I don't use Mod so I can't say for sure.

[kschang]

I know you can sorta do it in AviSynth, but only 2 clips at a time that I've tried. 4? I dunno.

[gadgetguy]

The script would look something like this:

A = aviSource(Clip1)
B = aviSource(Clip2)
C = aviSource(Clip3)
D = aviSource(Clip4)

A = Lanczos4Resize(A, halfwidth, halfheight)
B = Lanczos4Resize(B, halfwidth, halfheight)
C = Lanczos4Resize(C, halfwidth, halfheight)
D = Lanczos4Resize(D, halfwidth, halfheight)

Top = StackHorizontal(A,B)
Bottom = StackHorizontal(C,D)

StackVertical(Top,Bottom)