gerry Lau,
Here is a suggestion & some background:
We have used a 3rd output for a stage display (via HTTP) with OpenLP for almost 6 years now. This is accomplished by having Google Chrome "live" fullscreen on the 3rd monitor, and it is only used for this purpose. Once we started streaming back in our facility almost a year ago, what I was able to do was create a custom "stage display" to get my lyrics formatted suitable for showing as subtitles or lower 3rds on the bottom of our stream. (stream lyrics matched main screens with only one operator). (The stage display has very basic formatting so that it can be keyed into our video software as an overlay).
My suggestion to your query would be to use a custom formatted stage display, and simply have a fullscreen browser always be on the screen that is feeding to your video mixer via HDMI. If by some chance your video mixer can accept HTTP inputs (similar to the browser control in OBS Studio), you might be able to bypass the 3rd display entirely, and simply pull the HTTP stage display into the video.
Basically OpenLP -> custom stage display -> HDMI -> video mixer
Thank you so much for the quick response, gerry.
Your response is very helpful. Your setup is exactly what I need.
The part that I didnt knew that was possible is having a custom stage screen ¿How you made a custom stage display? Can you have multiple stage screens all with different themes? Im thinking one for the stream, another for the musicians, one for the pastor, etc. Its possible?
I'd really like to guide me more on how you have configured your setup, if its possible in a step by step way, Im really new in all of this.
I tell you my setup now in case is necessary. The video mixer is a little ATEM Mini Pro (I dont think that can accept HTTPS inputs) that one operator uses to change the live video from one camera to another, and we are connected to the video mixer from an HDMI using a 2nd computer. The lyrics appears on the stream like you have, in a subtitle form or lower 3rds; mine has a theme that is all black and letters in white. The operator has a LUMA overlay that only allows white to appear on the screen
Thank you for you great suggestions, I'd will look it up and investigate more. God bless