https://www.vmix.com/ is very similar to OBS but used in more professional settings and freemium, price for resolutions starting with HD is 60…1200$ (one time purchase for application).
It can output 3 streams in parallel and even features adding Call-in.
PTZ control for several cameras is possible as well.
How to overlay text
- Generate with ProPresenter
- send via Ethernet using NDI Network device interface
Use green background for chrome keying to have transparancy in vMix
alternative local ppt
- Create Master Slide for lower third, right text box, whatever needed
- fill rest with green for chrome keying
- overlay in vMix after camera inputs are mixed, into PIP
Use elgato streamdeck (150$) for switching camera inputs and preset and overlay (and dissolve)