Switch between two or more RTSP streams

I have two FPV cameras connected to the air unit of a MK32 GS from SIYI, and their app(SIYI FPV) sometimes freezes if QGC is opened at the same time, affecting the video stream and sometimes even crashing both apps, so I want a way to switch between the cameras so only one is active at a time, either with an app or hardware, any ideas?

Can you change bitrates?