Putting a video over another video?

[InSaNiTy]

Hi,
I have 2 videos and 1 images that I want to combine into one video. I have a video of a curtain I want to use as a background:
[
On it I want to put an image of a screen:


On this screen I want to put another layer of video.

How can it be done? (actually I somewhat managed to put the image on the first video, tryed to play with the blue screen in unleadmediastudio to put the second video but I got confused with it)

Thanks in advance =)

[gadgetguy]

It can be done using AviSynth.
I don't know what your source videos are so I experimented with your pictures and what I had on hand. The first thing I did was convert the picture of the screen to bmp, pull it into paint and fill everything outside of the screen with green. Then I used the following script.

Vid = DirectShowSource("superman_1941.mpeg").converttoyv 12()
Aud = Vid #Save the Audio
Screen = Imagesource("23061486nj3_4.bmp", End = Framecount(Vid)).converttoyv12()
Curtain = Imagesource("89667023go5.jpg", End = Framecount(Vid)).converttoYV12()
#Curtain = avisource("CurtainVideo.avi").Lanczos4Resize(320,2 56)
Vid = lanczos4resize(Vid, 200, 154) #Resize to fit on screen)
A = greenkey(Screen, Curtain, 1,1,1,interlaced=false)
B = Overlay(A, Vid, x=48, y=32, opacity=1).assumefps(29.97)
B = Audiodub(B, Aud)
return(B)

function greenkey(clip fore, clip back, int "low", int "high", float "gamma", bool "interlaced", bool "show")
{
interlaced=default(interlaced,true)
low=default(low,96)
gamma=default(gamma,1)
high=default(high,212)
show=default(show,false)

fore = (interlaced==true)? fore.separatefields() : fore
back = (interlaced==true)? back.separatefields() : back

green1 = overlay(fore.vtoy(),fore.utoy(),mode="multiply").c oloryuv(autogain=true)
green = green1.levels(low,gamma,high,0,255,coring=false).b icubicresize(fore.width,fore.height,0,.5)
overlay(back,fore,mask=green)

interlaced==true? last.weave() : last

show==true? green1 : last

}

There may be easier or better methods, but this worked for me. It was a little crude because I didn't spend much time painting the unwanted parts of the screen picture green, I just did a simple 'fill' in Paint. The Greenkey function comes from MugFunky at doom9 in this thread.


Edit: By cleaning up the screen picture a little bit and adjusting the Greenkey parameters it now looks like this:

[racer-x]

It's just your basic "Track Mask Editing" and can be done fairly easy with any good NLE. Premiere, Vegas, even Wax2 can do this.

I did a video tutorial a while back on Track Masks with Vegas. It's in english only though, and it's a lot more complex than your project. Here it is:
http://www.fortvir.net/gallery/d/2173-1/trackmasks_tut.mov

[Rudyard]

reacer-x I just stumbled in here and watched your clip....very helpful, good work and thanks for posting helpful vids.

[racer-x]

gadgetguy
I love and use Avisynth all the time. It always amazes me what it can do. For video overlays and chroma keying, it's a bit over my limit. I prefere to work in an NLE enviroment where I can see and adjust changes instantly. Avisynth is an invaluable tool non the less.

Rudyard
I just submited my Track Masks Tutotial to the Guides section. Don't know if there is one in there allready on Vegas, but maybe someone else will find it usefull.

[SLK001]

I would prefer to use a separate mask, instead of greenscreening, because it allows you to feather the edges so that the transitions between the two videos isn't so harsh.

Basically, you have two videos that you load. The mask (only $FFFFFF black and $000000 white) tells the overlay function where to place what video - ie, video 1 appears only in the white part of the mask and video 2 appears only in the black part of the mask. By feathering the edges of the mask, the transition is a lot smoother.

All this is using AVISynth, of course.

[gadgetguy]

gadgetguy
I love and use Avisynth all the time. It always amazes me what it can do. For video overlays and chroma keying, it's a bit over my limit. I prefere to work in an NLE enviroment where I can see and adjust changes instantly. Avisynth is an invaluable tool non the less.

As I said, it's not the only method of accomplishing what the OP wants, just one way.

SLK001
I'm not sure I follow what you're saying. I used the Greenkey only to put the picture of the screen in front of the video of the curtain.(Although, I used the picture of the curtain in the example it works equally well in front of a video). Then to put the target video on the screen it's a simple overlay, picture in picture style. Where would you use the mask and how would creating a mask be simpler than altering the picture of the screen for use with greenkey?