NewTek tricaster advanced edition, User Manual, Page: 99 / 339

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A
CT AS
A
LPHA
TriCaster 860 band 8000 optionally allow one or more neighboring pairs of video inputs to be combined as
a single ‘video + alpha’ channel (sometimes also referred to as “fill and matte”).
The ability to configure one input as the alpha channel source for another
is invaluable for installations employing traditional video feeds from high
end external CG and chromakeying systems (some third-party systems
now provide NDI output with embedded alpha channel, making this older
method unnecessary and eliminating the need to sacrifice an extra input).
To use this feature, select Act as Alpha Channel for Input (#) as the
Connection Type in the Input Configuration panel for an even-numbered
input (feature not supported by TriCaster Mini).
Note: The input configuration (video format and connection type) for the alpha input is automatically
configured to match the fill source it is paired with.
FIGURE 8-16
FIGURE 8-15