NewTek Tricaster TCXD850, Руководство пользователя, Страница: 165 / 336

Page | 149
DSK TRANSPARENCY
Remember that the source for a DSK layer is selected using the Switcher’s Utility row. Some DSK
sources may be partially transparent. This might be because they are drawn from a Media
Player (DDR, Stills or Titles) file that includes an embedded alpha channel , because LiveMatte or
Cropping are enabled for the source, or even all of the above
Regardless, DSK layers will automatically respect transparency when the source supplies it. The
BKGD layer (and, for DSK 2 , its lower-numbered sibling) will appear through or around sources
with transparency as 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 137
TriCaster’s DSK layers offer a lot of creative possibilities. You might use one DSK to display a
permanent station ID ‘bug’. Or, you might superimpose a company logo from Stills onto a title
page, add a ‘spinning globe’ animation playing in the DDR to a lower-third, ‘frame’ a keyed
source composed over a title (Figure 137), or set up many other elaborate effects in this manner.