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DSK T
RANSPARENCY
Sources assigned to DSKs are often partially transparent. This might be because they are drawn from a
Media Player (DDR or Graphics) file that includes an embedded alpha channel, because LiveMatte or Crop
options are enabled for the source, because a Network source includes an alpha channel, or all of these factors
operating together.
In all of these cases, DSK layers automatically respect transparency when supplied by the source. The BKGD
layer and all visible content in lower-numbered DSKs will appear through or around sources with
transparency as appropriate.
Important Note: It’s best to use files with straight (a.k.a. “non-premultiplied”) alpha channels in TriCaster’s
Media Players. Premultiplied files will generally not yield correct results when overlaid on other imagery.
FIGURE 9-14
TriCaster’s DSK layers offer a lot of creative possibilities. You might use DSK channels to display a permanent
station ID ‘bug’, superimpose a company logo onto a title page, perhaps to add a ‘spinning globe’ animation
playing in the DDR to a lower-third, ‘frame’ a keyed source composed over a title (Figure 9-14), or set up
many other elaborate effects in this manner.
9.4.2
MAIN CONTROLS
In large measure, TriCaster’s main Transition controls behave similarly to their local sidekicks. What makes
them especially powerful is the T-bar and Transition Delegate button group located just above.
B
ACKGROUND
T
RANSITION
Transition control settings in this section apply to the Background video layer only. In
most respects, these tools are identical to the DSK transition controls discussed earlier
(Section 9.4.1), but there is one difference worth mentioning.
The Duration menu for the Background transition offers two additional items compared
to the similar menu in the DSK control groups:

Reverse – configures the current transition to run in reverse direction the next
time it is applied.
FIGURE 9-15