Ok, I messed around with some stuff and I think I have gotten a more reliable setup, but still need to incorporate the arduino. I was able to get things working well by increasing the size of the wire i used to run from the media cabinet to the TV. I also increased my power supply to 20a and run the power for the raspberry pi and leds power from it using the larger wires. No cap, no resistor yet. Using this setup the HA integration. seems to work to let me toggle between a solid color and the USB capture card. So I am making some progress... Now if i can figure out how to make the default just white then i manually turn on the usb i would have at least accomplished the basic setup of what i was doing but in the hyperion ui doesn't let me set the solid color/effect at a lower priority # than the USB.
Do I only need to run a wire from the pin 6 on the Arduino to the data wire on the leds then plug the arduino in via USB to the pi3?