How can I overlay a video with another video?

[afdast]

Pretty much I want to add green screen video and add it over the other one.
I'm pretty sure it needs AviSynth and MeGUI, but I don't know much about them .

What I'm trying to achieve:
1. I already have the videos
2. How do I make them to overlay
3. How to time the green screen one to the other and remove the color (by the way the green screen video will be made by me,
and can it be rendered in Sony Vegas without the green screen, maybe make it somehow like a png without the background)
4. And how to render them

I watched a video of how to add a watermark, but I want to know how to add a video and time it to the other.

[LigH.de]

Regarding AviSynth, you can learn about Layer and related functions (e.g. ColorKeyMask producing a mask based on RGB tolerance ranges). For a PiP (Picture in Picture) case, you don't even need a mask, just a rectangular area.

To limit this feature to a range of frames, you can use ApplyRange, a special case of Animate.

[poisondeathray]

Why don't you just do it in vegas ? You can do the chroma key, timing, overlay all in vegas

[pepegot1]

Use Corel Videostudio Pro X10 - quick and easy - not like Vegas.
The best is Green Screen Wizard but, you will pay and get what you pay for. http://www.greenscreenwizard.com/

[Budman1]

You can use AVISYNTH and feed it to your video converter/editor (even FFMPEG) for one or several overlays.



The code you need is similar to this:

v1 = Directshowsource("C:\Users\Bud\Desktop\[dp]Manjandani-1.mp4").ConvertToRGB32.Lanczosresize(854, 480)
img1 = DirectShowSource("C:\Users\Bud\Desktop\[dp]Manjandani-1.mp4", pixel_type="RGB32", fps=29.97).converttoRGB32.LanczosResize(160,90)
img2 = DirectShowSource("C:\Users\Bud\Desktop\[dp]Manjandani-1.mp4", pixel_type="RGB32", fps=29.97).converttoRGB32.LanczosResize(160,90)
clip1 = v1.trim(0, -100) \
 ++ v1.trim(100, -50).Overlay(img1, 10, 10,Opacity=1.0, img1.ShowAlpha()) \
 ++ v1.trim(150, -50).Overlay(img1, 10, 10,Opacity=1.0, img1.ShowAlpha()).Overlay(img2, 180, 110,Opacity=1.0, img2.ShowAlpha()) \
 ++ v1.trim(200, -100).Overlay(img2, 180, 110,Opacity=1.0, img2.ShowAlpha()) \
 ++ v1.trim(300, 0)
return clip1