Vision Mixer: Special Effects
The use of special effects facilities on switchers can improve the scope of production capabilities.
The wipe
Available on most switchers, this can best be described as one picture gradually replacing the original picture. The direction of entry can be horizontal, vertical, diagonal, circular, diamond shaped and so on. The ‘edge’ of the wipe can be sharply defined (hard) or electronically defocused (soft).
The split screen
This is a wipe which is frozen at some pre-determined point. The composite picture is made up from two picture sources.
Chroma key
This is a powerful production facility whereby part of one picture, known as the foreground source, is electronically inserted in another picture, known as the background ...
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