User`s guide

Using the Shot Editor
Shot Editor Chroma Key
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Wirecast User Guide | 104730
the controls. Use the sliders to set the Key Threshold, Black Clip, and White Clip. Click
the Defaults button to restore all controls to their default state.
Working Top Down
The key color is the color of the background you want to drop out of the resulting
media. The Chroma Key configuration panel is designed to work through the
configuration as a process, from top to bottom, fine tuning your key as you go. It is
important to not over-adjust any one control. A good key color is obtained by finding
the right balance in the controls.
Selecting a Key Color
To get the best key possible, select the key color using the mouse. To do this check the
Pick key color with mouse checkbox. Use the mouse to click a point on the image in the
preview area. As you do this watch the preview change in level of transparency,
displaying the gray/white checkerboard pattern on the affected regions. Usually,
clicking near the corners of the media provides the best key, but sometimes clicking
near the main subject in the image is best.
Key Threshold
Once you have the best key by picking the color, you can adjust the key threshold to
drop out the background as completely as possible. The Key Threshold parameter
enables Wirecast to determine how close the color in the video is to the key color.
Adjust the key threshold (0 to 100) by using the slider.
Black Clip
Sometimes, dark areas are keyed out, when they should not be, due to how digital
cameras function. The Black Clip parameter controls how close the keying is toward
black. For example, if the host has black hair, you need to increase this value slightly so
that the keying effect is not seen in his hair. Adjust the Black Clip (0 to 100) by using the
slider.
Chroma Key button
Slider controls
Default button
Use Chroma Key
checkbox