Using this example https://www.wowza.com/docs/how-to-add-graphic-overlays-to-live-streams-with-wowza-transcoder I am able to bring image and text inside my live streams, it is working fine for me. I would like to know whether there is any way to update the text dynamically through HTTP Post method or through Websocket connection or any other way. Is there any sample tutorial available for this situation.
It is possible, but will require some work. We do not have a tutorial at this time, but tech support can work with you on this through a support ticket.