AJA KONA 4 PCI-E Video I/O Card (HDMI Output, Cable Included) - Manual (Page 51)

KONA Capture, Display, Convert v15.5 51 www.aja.com
Downstream Keyer
Mode
• Downstream Keyer Off - When this pulldown menu item is selected the
downstream keyer will be turned off.
• Frame Buffer over Matte - fixed color matte determined by the “Matte Color”
setting set separately.
• Frame Buffer over Video In - Places the keyed video currently in the
framebuffer 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.
• Graphic over Video In - Places a graphics file having an alpha channel (chosen
in “Graphic File” pulldown) over the video input for playout or print-to-tape.
• Graphic over Frame Buffer
• Places a graphics file having an alpha channel (chosen in “Graphic File” -
pulldown) over the current contents of the KONA card’s framebuffer (which
might be from storage, video In, KONA TV, etc.).
Matte Color
Only available when the pulldown “Frame Buffer over Matte” or “Graphic over
Matte” are selected-pressing this button brings up a color selection dialog. The
dialog provides a variety of ways to select a matte color including a color wheel,
color picker (choose from a location anywhere on the computer screen), numeric
sliders, swatches, “crayons”, and spectrums. The matte chosen will be used as a
video background under the keyed video.
Foreground pre-multiplied (checkbox)
Use to avoid “matte lines” and improve the appearance of the foreground (key)
being composited over the background.
Audio Out
• Frame Buffer - Select audio out to be routed from the contents of the
framebuffer.
• Audio In - Select audio out to be routed from KONA’s currently selected
input(s).
Opacity (slider)
This slider controls the transparency of the keyed video (over the background)
from translucent to completely opaque.
Graphic File
This pulldown allows you to choose from any recently accessed file or select a
new file (“Load File...”), which then brings up a file dialogue. Remember that the
file raster (pixel x pixel count) should match the Device Format in the framebuffer
or the Converted Format if upconverting. Example: you wish to key a logo on
top of your 1920x1080 footage, the still image with alpha channel that you load
should be 1920x1080.