AJA IoXT - Manual (Page 45)

Io XT v10.4 www.aja.com 45
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 Frame Buffer.
Audio In: Select audio out to be routed from the Io XT’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.
Timecode Screen
The timecode is used for both monitoring the RP-188 timecode embedded in the digital
data stream and for selecting a timecode offset (if required) for the attached VTR
(connected to the RS-422 port)—and sent during assemble-edit mode.
Note: SMPTE 12M-2 is the updated name and specification for what was RP-188.
Figure 39. AJA Control Panel, Timecode Screen