Matrox MXO2 PCIe Host Adapter - Manual (Page 243)

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Specifying your settings for media streaming
4 To configure your source settings, choose Sources > Show Sources
Settings .
5 In the Source Settings dialog box, under MATROX INPUT DEVICES ,
select the Matrox device that you want to configure, and then specify the
following settings:
$
From the Video Format list, select the video format that matches your
source video. For a list of the video input formats supported on the various
MXO2 inputs, see
“Supported input formats” on page 304 .
$
From the Video Source list, select the type of video input you want to
stream. For example, to stream video from your HDMI source, select
HDMI . The available video input sources depend on your selected video
input format.