I have a Pi 3 with a 3.5" TFT touchscreen that I'm considering using as a Video DJ device at events, hooked up to a projector system. Trying to figure out if this project makes sense before I get too involved in it. Basically, here's the concept:
On the small touch display, a GUI with buttons will be available. Each one can be assigned to a video / graphic / etc file. When pressed, it will send the required asset out the HDMI to the big screen system.
Seems simple enough, right? I know that OMXPlayer can send the output to the HDMI even if the internal display is in use (since it normally disables the hdmi), so I feel like all I need to do is create some sort of GUI that will send the appropriate command to invoke OMXPlayer with the correct parameters (file to be played, and on the external display). If anyone has ever used the Windows application Screen Monkey, that's sort of what I'm trying to replicate. I'm occasionally asked to run a projector at fundraiser events and what not, and I think the Pi used like this would make an excellent alternative to setting up my laptop each time.
Am I barking up the right tree? Any caveats I should be aware of? Has anyone done anything like this already that I could base it off?