NewTek TriCaster TCXD300, User Manual

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Figure 140
Clicking a button in the input selector updates the Source button label, and closes the selector
(clicking anywhere outside the selector closes it without changing the current selection).
12.3.3 SOURCES AND TRANSPARENCY
Some Overlay sources may be partially transparent. This might be because they are drawn from
a media player ( DDR , Stills or Titles ) showing a file with an embedded alpha channel , or perhaps
because LiveMatte is enabled for the source. In either case, Overlay will respect the
transparency. The ‘upstream’ switcher output will appear through (or around) the Overlay
channel source where appropriate.
Important Note: Use straight (a.k.a. “non-premultiplied”) alpha channels in TriCaster’s media
players. Premultiplied files may not yield correct results when overlaid on other imagery.
Figure 141
TriCaster’s Overlay channels offer a lot of creative possibilities. You might use one channel to
display a permanent station ID ‘bug’. Or, you might superimpose a company logo from
Stills
onto a title page in Overlay channel 2, add a ‘spinning globe’ animation playing in the DDR to a