Io XT/4K Capture, Display, Convert v14.0 38 www.aja.com
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 Buer - Select audio out to be routed from the Frame Buer.
• Audio In - Select audio out to be routed from the Io XT/4K’s selected input(s).
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 up-converting. 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.
LUT Screen
The LUT screen controls allow you to create a custom color look up table (LUT) on
the output, for matching a production "look" on a specific display.
Users can also specify their own custom LUTs by creating a LUT file and uploading
it to an AJA Video Device using the LUT (lookup table) screen in the Control Panel.
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