How To Use Chroma Key in Videopad Editor to remove background video or image

What is Chroma Key?

Chroma key compositing, or chroma keying, is a special effects / post-production technique for compositing (layering) two images or video streams together based on color hues (chroma range). The technique has been used heavily in many fields to remove a background from the subject of a photo or video – particularly the newscasting, motion picture and videogame industries. A color range in the top layer is made transparent, revealing another image behind. The chroma keying technique is commonly used in video production and post-production. This technique is also referred to as color keying, colour-separation overlay (CSO; primarily by the BBC), or by various terms for specific color-related variants such as green screen, and blue screen – chroma keying can be done with backgrounds of any color that are uniform and distinct, but green and blue backgrounds are more commonly used because they differ most distinctly in hue from most human skin colors. No part of the subject being filmed or photographed may duplicate a color used in the background

source : Wikipedia

How ti use Chroma Key in Videopad?

Chroma key, also known as blue screen and green screen, is easy to use in VideoPad. You'll need two video clips on your main sequence: the background image on a lower track (such as Video Track 1) and the main object on a higher track (such as Video Track 2). For best results, the background of the main object (which you'll remove) must be a very consistent color (e.g., without highlights or shadows), and that same color must not appear on actors or objects if you don't want to remove the color there as well.

The Chroma Key effect is in the Video Effects dialog, which you can open by clicking the Effects button. From the Video Effects dialog, click the drop menu at the top and select Chroma Key and click Add to add the effect to the Applied Effects list. Click the Configure Effect button to open the Chroma Key Select dialog.

Select the color you want to remove by clicking on a color in the clip preview, or by clicking on the color picker control. Change the Background and Foreground values to adjust how similar a color has to be to the selected color for it to be removed.

The Background value can not exceed the Foreground value. As you move one slider, the other may move automatically, to maintain this relationship.

source: http://www.nchsoftware.com