By first matching the output shape, you've made sure your input slice has the same aspect ratio as your output shape. This means that you will exactly see that part on your LED wall. What you have now is a slice that takes a 2x1 piece of your composition and places it in the top left of your output. Now scale it up until it fills the entire Input Selection stage again, Make sure you hold down both Shift and Alt to scale proportionally from the center! Drag it back to the center, letting the snapping do the hard work for you. This will place your slice exactly in the same place as it has on the Output Transformation stage.
Now switch over to the Input Selection stage, right click the Slice, and hit Match Output Shape. Output MapĬreate a new setup, and on the Output Transformation stage, you make your single slice 384x192 pixels in size and place it exactly in the top left of your output. You could of course render all your content to this scale before show, but it's much easier to use the Advanced Output. It's only interested in the 384x192 pixels in the top left of that signal. In this case the regular video signal is 1024x768, but it could be any standard video resolution. The processor will only take the top left part from a regular video signal. The output your processor expects would look something like this: Let's say your LED wall is 384x192 in resolution.
The processor takes the top left part of the video signal and shows it on the LED wall. In the case of a single LED screen, setup is relatively simple. A LED processor usually takes a single video input (DVI/HDMI/VGA/composite) and divides this signal over the connected LED walls.
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