Live camera switching for virtual production

I’m setting up a virtual production studio, and I am wondering what the best way to go about doing a live camera switching set up would be. This virtual production studio will most likely be used for podcasts hosted by no more than four people at a time. We usually run a three camera set up, cameras are locked off on tripods. But I would need to figure out how to get the unreal frustum to switch to the correct perspective of the live camera between each three. If anyone has any tips going forward, they would be much appreciated!