Welcome to the Live Video Production & Visual Presentation Reinforcement area of the WELSTech wiki!
Introduction
Orientation
Live Video Production is the use of video systems to show presentation and/or video program material to people who observe the event...
Usually there is a separate video program for each group of observers in the list above because those in attendance at an event may not need to see images of the event leaders on the big projection screen.
Other times,the exact same program material may be sent to both on-site and remote audiences (i.e. there is only one video program), especially when the event is large enough that those on-site benefit from the use of image magnification ("imag"), and there is only 1 video projection screen available. Imag is the technique of making event leaders more easily seen, by putting a video image of the event leader into the video program, using cameras that are zoomed up close to the body of the leader. If there is more than 1 video projection screen, then the matrix of video program mixes may become a bit more complex, but possibly very helpful.
Imag is not necessary in most WELS churches, so most WELS churches use the technique of having 2 separate video programs: one for the projector(s) in the sanctuary and another for broadcast (live streaming) to remote TVs on the church campus (cry rooms, fellowship halls, overflow rooms, etc.) and/or the Internet. Often, the sanctuary screen(s) are fed by a computer running presentation software, while the remote feed is fed by a simple video camera.
Some live video production systems are more complex, using multiple cameras and some way to switch between or mix the sources of video. See the page about Video Mixers, Matrices and Switchers for more information.