AJA Kona 4 Installation & Operation Manual page 52

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 Frame Buffer (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-
Use to avoid "matte lines" and improve the appearance of the foreground (key) being
multiplied (checkbox)
composited over the background.
Audio Out
Frame Buffer: Select audio out to be routed from the contents of the Frame Buffer.
Audio In: Select audio out to be routed from KONA's currently selected input(s).
Opacity
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 primary format in the frame buffer or the secondary
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.
Figure 35. Downstream Keyer Graphic Selection
KONA v12.3 52 www.aja.com