Video Switcher

Basic usage

UltraGrid

If you have multiple video sources you want to switch between during transmission, you can use video switcher dummy video driver, syntax is following:

uv --control-port 5054 -t switcher -t decklink:0 -t decklink:1

Note: the order of -t arguments is important, first must be "switcher", consequent capture parameters give the switcher possible inputs that can be switched to. It is usually a good point to have the same video format from all sources, although not required.

Control

Switching then can be controlled with following command (distributed with UltraGrid):

switcher_control_keyboard localhost 5054

This command controls UltraGrid instance on localhost with control port number 5054. You can also control remote instance of UltraGrid if you specify remote address. Switching is then done simply by pressing 0,1,2... keys (first input is indexed 0).

Capture filters

You may also apply capture filters for individual inputs:

uv --control-port  -t switcher --capture-filter blank 0:0:100:100 -t testcard --capture-filter 1000:0:80:100 decklink

Here --capture-filter parameter relates directly to nearest succeeding -t parameter.