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User Manual

ManualsBrandsSony Creative Software ManualsAudio SoftwarePICTURES Vegas Pro 11 - AUDIO VIDEO AND BLU-RAY MASTERING PRODUCTION SOFTWARE
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USING VIDEO EFFECTS, COMPOSITING, AND MASKS | 323
Chroma keying
Chroma keying or bluescreening is a special case of overlay transparency. A color key is a specific color or a range of similar colors in
an image that are made transparent, allowing a background video to show through. The idea is to take a video subject and film it
against a solid, uniform background color. It is critical that the color be smooth and uniformly lit with no shadows, and that the
color chosen for the background not be used in the subject.
The most important factors in successful blue screening happen during shooting, well before the footage is imported into Vegas
Pro software. Compression of the source video is also an important consideration. While almost all video is compressed in some
way, highly compressed video does not key well because colors can be smeared together and edges tend to not be very sharp.
If your source footage is good and the captured video file is also of high quality, color keying is an easy process.
1.
Insert a video with a blue (or any solid colored) background into a track. This is the overlay video.
2.
Insert the background video that will show through the blue areas into the next lower track.
3.
Click the overlay video (foreground, higher track) to select it.
4.
Drag a Chroma Keyer plug-in from the Video FX window onto the overlay video. The Video Event FX window displays.
5.
Click the down arrow to the left of the Split Screen View button ( ) on the Video Preview window and choose FX
Bypassed. This will bypass the effect of the Chroma Keyer plug-in until you are ready to view the effect.
6.
In the Video Event FX window, click the Pick Color from Screen button ( ). The cursor changes to an eyedropper icon.
7.
Draw (click and drag) a small rectangular selection area around the color(s) to key out. Although you can select the color range
from just about anywhere, the Video Preview window is the best location.
Note:
You do not need to set the lower track as a child track when using the Chroma Keyer plug-in as you would with a mask.
Note:
Other effects that can change the color of the event should be bypassed when using the Pick Color from Screen tool.
Magnified
area
Compressed video
Uncompressed video