Trying to use Arduino TV-Out to switch feed to a TV set, s.a. ones found in Clinics, to display some information, s.a. next patient, expected delays etc. The TV is normally playing regular programming fed by a cable STB, but say every 5 minutes, switches to Arduino's TV-out, to display such info, for say 30 seconds, and then switches back to regular programming.
So, the question is --
What might be a very "economical" (circuit / device cost wise) way to switch the input of TV between multiple RCA type composite video feeds (s.a. old'ish set-top-box, teletype box, VCR...) ? If it can switch Audio feeds too, great, but priority (and absolutely must) for me is video switching.
Also, note that I'd like this to happen, under uC control (s.a. Arduino), i.e. the uC decides when to switch to which A/V feed. At the moment, I am looking for capability to switch between one of the 2 feeds.