Getting Started with ATEM Chroma Keying

Green screen keying on an ATEM

A chroma key removes a green screen background and composites your presenter over another source. The ATEM does this live, in hardware, with no rendering — which is why it works for broadcast and streaming rather than only post-production.

What the video covers

• Choosing chroma from the four upstream keyers in the palettes menu
• Setting the fill source to your green screen camera
• Using the chroma sample tool to pick the hue being keyed out
• Previewing the composite before it reaches air
• The spill tool — removing green reflections from skin, blonde hair and shiny surfaces
• Refining foreground, background and edge settings
• The flying key — repositioning and resizing the composite, with keyframes A and B

Spill suppression is usually the difference between a key that convinces and one that doesn't, particularly with fair hair or reflective clothing. Explore the ATEM range.