Projection mapping with two different video outputs to two projectors?

hello community!

I want to do a projection mapping for a performance where different stage areas should be mapped with different videos via two projectors at the same time. I have a feeling this should be possible by using Window COMP and hmm double Kantan Mapper? or a second computer is needed for this?
wanted to get a feeback on this idea, would really appreciate any tips ty!

Your question is not very clear.
Do you have a computer with two discrete outputs?
If yes, you can use two different flow, each one with image producing, kantanMapper and a window Comp.
Some prefere to group the two output in a single window but I dont agree…
If you have only one output, you can use a video splitter (as Matrox doublehead2go or Datapath).
A second computer seems a little bit extreme and more difficult to manage.

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thanks @jacqueshoepffner for your reply.
sorry if my question was unclear, still find it tricky to wrap my head around some tech issues.
I wasn’t sure about the setup it will require (main question was if TD can do projection mapping using two projectors that use different videos). Seems like using video splitter was the answer :slight_smile:

I have a computer with a single output. so just to make sure I understand correctly, in this case window Comp will be managing which projection mapping goes to which projector?
thanks again!

It seems nobody has replied to this in a while. I hope you have found your answer somewhere else, but in case not:

TouchDesigner get’s it information on connected displays from the OS. There is no discerning between a connected monitor and a projector. All the displays reported by the OS are situated on one virtual canvas, and a window can be placed anywhere inside (and even outside of) this canvas, either by monitor nr with relative coordinates or by absolute coordinates. To output to 2 projectors, you can make your window fullscreen on the first projector, but make it as wide as the sum of the two projector’s widths.

You need only 1 kantan mapper, also set to this total resolution, and then you create projector 1 on the left side of the canvas, etc.

If you use a laptop with 1 hdmi out port, you can check if there is a second output on displayport, vga or usb-c and use an hdmi adapter for that. If that is not an option, you can use a video splitter (good video splitters are expensive!) as suggested above. In that case you would set your resolution to any resolution the display splitter can ingest and that can hold the full canvas (most likely you will fill the top 2 quadrants of a 4K texture with a 3840x1080px canvas)

Let’s say in the future you want to build something with 8 fullhd outputs, then you get a (powerful) computer with at least 2 outputs, to send 2x 4k to 2 video splitters), but still use just 1 kantan mapper with a 3840x4320px canvas and layout the outputs in a grid of the same composition in the OS (in windows this is called Display settings)