AJA Control Panel Function Screens
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DS Keyer Screen
The Avid Artist | DNxIV has a hardware-based downstream keyer that is ideal for putting logos,
“bugs” or other video material with an alpha channel on top of video being played out or printed to
tape.
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The Avid Artist | DNxIV does not support Downstream Keying in UltraHD and 4K formats.
A typical application would be putting a television station's call letters or channel over program video
content. Keyed video can be from the Avid Artist | DNxIV internal Frame Buffer (from storage,
video In, etc.) or from a graphics file that has an alpha channel (Photoshop etc.).
Settings in the DS Keyer Screen provide control over how the keyer operates and whether it's turned
on or off.
Mode
Downstream Keyer Off - When this pulldown menu item is selected the downstream keyer will be
turned off.
•
Frame Buffer over Matte - Places the keyed video with alpha channel currently in the Frame
Buffer over a fixed color matte determined by the “Matte Color” setting set separately.
•
Frame Buffer over Video In - Places the keyed video currently in the Frame Buffer over the video
input for playout or print-to-tape.
•
Graphic over Matte - Places a graphics file having an alpha channel (chosen in “Graphic File”
pulldown) over a fixed color matte determined by the “Matte Color” setting set separately.
