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API > API/Plugins > API/Plugins/MediaIOCore > API/Plugins/MediaIOCore/FMediaIOOutputConfiguration
Syntax
UPROPERTY&40;VisibleAnywhere, Category&61;Configuration&41;
int32 KeyPortIdentifier
Remarks
The port of the video channel on the device to output the key to.
'Frame Buffer Pixel Format' must be set to at least 8 bits of alpha.
'Enable alpha channel support in post-processing' must be set to 'Allow through tonemapper'.