Which device is used to select different video sources and, in some cases, composite video sources to create effects? Tricaster by Vizrt is a brand name for a popular example.

• A. Router
• B. Encoder
• C. Switcher
• D. Monitor

Answer: (C)

In video production, a switcher (also called a vision mixer) is the device you use to choose between multiple video sources and apply transitions or effects to build the final program feed. It doesn’t just route signals; it blends them, adds transitions like cuts, dissolves, wipes, and can layer graphics or picture-in-picture to create a polished live or recorded show. Models like TriCaster from Vizrt are popular because they integrate switching with built-in graphics, streaming, and recording, making them versatile for real-time production.

The other devices don’t fit this role: a router channels signals to multiple destinations but doesn’t provide live source selection with effects; an encoder converts video into a digital stream for distribution but doesn’t manage switching between sources; a monitor simply displays video and doesn’t perform switching or effects.