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APPENDIX A: KEY/FILL CONNECTIONS
A.1 MARK M SYSTEMS
Key/Fill output using two SDI output connectors is supported as follows:
• SDI connectors numbered 1-4 show “video and alpha” options in their Configure Channel Format
menu. Selecting this option sends ‘video fill’ from the source to the designated SDI connector (let’s
refer to it as SDIn), and places the ‘matte’ output on the SDI output connector SDI(n+4).
For example, suppose the unit is configured with 4 inputs and 4 outputs:
o In this configuration, SDI connectors 5-8 serve as outputs.
o If the Format for SDI 5 is set to a “video and alpha” option in its Output tab, SDI 9 will supply
the corresponding matte output.
Key/Fill with 4K format is supported as follows:
• Using NDI source with an alpha layer and output a key + fill over quad-link SDI.
In this configuration use output 1-4 for the Fill and 5-8 for the Key.
o Bring the NDI video to Channel 1 (ensure the video being received has an alpha layer).
o Make sure all Channels are set to a Hardware Video Destination of “None”.
o Set Channel 1’s Hardware Video Destination to “Quadlink SDI Out ch 1 (1, 2, 3, 4)”.
o Set the Video Format to the desired resolution and framerate making sure it includes “and
Alpha” in the option.
A.2 MARK D SYSTEMS
Key/Fill output using two SDI output connectors is supported as follows:
• Even-numbered output channels show “video and alpha” options in their Configure Channel Format
menu. Selecting this option sends ‘video fill’ from the selected source to the designated (even-
numbered) SDI connector.
• The ‘key matte’ output is placed on the next lower-numbered connector. (So, for example, if the fill
is output on SDI output 4, the SDI output connector labeled 3 will supply the corresponding matte).
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