I am currently mixing an IP Camera stream with audio and forwarding that using ffmpeg (which helps in going from RSTP to RTMP. I would like to have multiple Camera streams (and a single audio stream), where I rotate every few seconds the Camera streams and produce a single output stream again with ffmpeg. I am looking at the available filters for a filter graph but haven't seen anything like it. (Could have overseen it though, there are so many)

Any tips?