Global Streams GlobeCaster STUDIO 4000, Manual

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59 GlobeCaster
Swi t che r M anu al
This brings up a pop-up menu (Figure 3.21).
Figure 3.21: External Alpha Pop-Up Menu
The selections on the pop-up menu vary according to what is loaded into your
GlobeCaster system. For example, it lists installed input cards. In this case,
input cards are installed in slots 1, 3, and 4 of the GlobeCaster. You can also
use mattes, framestores, black, or Program Out as your video source.
2. Select the appropriate video input source.
3. Click on the Alpha Input button next to the Video Input button.
4. From the pop-up menu, select the source you want to use as the alpha channel
for the video input.
When you set the key to External Alpha in Switcher, GlobeCaster automatically
uses the designated source as an alpha channel for the video source you chose.