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Keyer Areas
When the key bus is contributing to the switcher Program output,
pressing MATTE FILL does not low tally the key bus, even though
the key fill video is not visible.
Video fill mode operates with background keyers in layered
mode. When the keyer is delegated to a background layer, the
VIDEO FILL
button is turned on automatically (MATTE FILL is
turned off).
Key Source Buttons
The VIDEO KEY and AUTO SELECT KEY buttons determine the
source of the key.
Pressing the VIDEO KEY button forces derivation of the key from a
video source. The “video source” is the video selected on the key
bus (for keyers 1 and 2) or on the background bus (for background
keyers in layered mode only).
If
VIDEO KEY and VIDEO FILL are both selected, the result is a self-
key.
Pressing VIDEO KEY while in Chroma Key mode causes an
encoded chroma key, using the fill video as the source for the
encoded chroma keyer.
Pressing the AUTO SEL KEY button forces the key to be derived
from a user-defined source.
User preferences selected in the Configuration/User Preferences
menu determine whether a luminance or linear key is a self-key or
an external key (and determine which external key is used). They
also specify whether chroma keys are encoded or analog
component (YUV, BETA, MII, or RGB).
Auto
Select
Key
Video
Key
Auto
Select
Key