A vision mixer, also known as a video switcher, video mixer or production switcher is a device used to select or mix two or more different video sources and in some cases to add special effects.
There are various types of vision switchers that accept different video inputs from composite video (BNC/RCA/Phono), VGA, DVI and HD-SDI. Higher end switchers oftern offer all these inputs for flexibility.
The switchers and vision mixers we hire can be used for presentation switching, in a conference environment for example, for switching between a number of live camera feeds, presentaions laptops etc.
Besides hard cuts (switching directly between two input signals), mixers can also generate a variety of transitions, from dissolves to pattern wipes. Additionally, most vision mixers can perform keying operations and generate color signals (called mattes in this context).