Syphon Video Output Device allow to exchange GPU texture between softwares of a same computer.
This allow to plug Smode as a video stream source of external software.
Note that this device only available on MacOSX Systems.
Whether you see this problem in your devices
or this one in your video outputs;
it means that you have to add the requested number of IO Channel
Remove watermark on inputs and outputs channels
Read More to your device.