As mentioned, you can use the RPI as a show player and a light controller. So you have a few decisions to make:

Do you want to use vixen or RPI as your show player?
If you use vixen as your show player then you can use an E1.31 application to convert the E1.31 data from Vixen into something you can output on your GPIO ports.
If you use RPI as the show player, then FPP has a mechanism for hooking into the data stream and outputting data to the GPIO pins. This would be my prefered option. The RPI as a show player is much less expensive than tying up one of my laptops or computers for lighting. RPI is pretty much an all-in-one solution for under $50.