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Input Screen
IO Express Control Panel , Inputs Tab
On the Inputs screen, you can view the currently selected video and audio input sources
and map audio sources to the channels supported by your capture application (more on
this later). Two information panes in the screen are provided: Video Input and Audio Input.
Input Screen Settings
Video Input
—These radio buttons allow you to see and change what’s currently selected
and the video format that Io Express has detected there (if any). If you wish to select a
different input, click a different radio button. Choices are:
•
HD/SD SDI input
•
HDMI 1.3a input
Audio Input
—This pulldown menu allows you to choose where the audio comes from. Io
Express supports up to 8 channels of embedded digital audio, so you can choose from
the 16 channels that can be embedded in SDI, and pick which to bring in (from the
group 1-8 or 9-16). If your application supports only two channels of audio, you will
select which two channels from the 8 selected embedded will be mapped to the two
designated channels (1 & 2).
Format Screen
The Format screen shows the video format currently in use by the Io Express framebuffer
(called the
Primary Format
) and allows you to change it. Throughout the Control Panel,
choices are always presented based on what Io Express can do with the signals available
and the inputs/outputs selected. For example, on the Formats screen, if the output or inputs
are a different format than the primary, you’ll see an additional information pane that allows
you to view and edit the secondary format—including control over whether down-
conversion is employed. In the figure below, the SDI input (Secondary Format) is being
down-converted to the Primary Format.
Click a Tab to
Select a Screen.
Click to Select
an Input for capture
Click side Arrows to
View hidden Tabs (Left
or Right)
