Vision Mixer

A vision mixer (also called video switcher, video mixer or production switcher) is a device used to select between several different video sources and, in some cases, compositing video sources together to create special effects. This is similar to what a mixing console does for audio.
Typically a vision mixer would be found in a video production environment such as a television studio, production truck, OB Van or linear video editing bay of a post-production facility.

Manufacturers

• Evertz  Microsystems
• Barco (manufacturer)
• Blackmagic Design, ATEM Production Switchers
• Broadcast Pix, Integrated Live Production Tools
• Datavideo
• EVS Broadcast Equipment: Dyvi 
• Gallery SIENNA: NDI Vision Mixer 
• Focus Enhancements (Videonics)
• FOR-A
• Grass Valley
• Guramex, professional broadcast quality vision mixers (production switchers)
• Kramer Electronics Ltd.Kramer Electronics
• Play / GlobalStreams (Trinity), (GlobeCaster) 
• NewTek (Video Toaster), (TriCaster)
• Panasonic
• Philips
• Roland Corporation
• Roland Systems Group
• Ross Video
• Snell
• Sony
• VideoSolution Group
• ColosseoEAS