[FFmpeg-user] Loop around multiple streams for a few seconds

Hi, We are trying to achieve something a bit specific and I haven't been able yet to figure out if it's actually possible with FFMPEG: We have multiple camera streams and we need to export this as a unique output stream looping on all inputs for 5 seconds. Bonus feature: keep all inputs "alive" so we get a smooth switch between them, Any hint ? Thanks in advance, Best regards, Adam.