Set Chroma Keyer

Sets details for the chroma keyer. This action only works on those ATEM switchers that lack the advanced chroma keyer.


  • Index: The 1-based USK index for the keyer.

  • Mix Effect Block Index: The Mix Effect Block to change. Default is M/E 1.

  • Fill Source: The fill source to use for the Chroma keyer.

  • Enable Mask: Toggle whether to crop the Chroma key area.

  • Mask Top: The mask top value from -9.0 to 9.0.

  • Mask Bottom: The mask bottom value from -9.0 to 9.0.

  • Mask Left: The mask left value from -16.0 to 16.0.

  • Mask Right: The mask right value from -16.0 to 16.0.

  • Foreground: Adjustment on how opaque the foreground mask is.

  • Hue: Adjustment to the hue value.

  • Gain: Adjustment to the gain of the keyer area.

  • Y Suppress: Adjustment to remove colored tint from the edges of the foreground elements.

  • Life: Adjustment to lift value of the keyer area.

  • Narrow Chroma Key Range: Boolean.

  • Enable Flying Key: Enable the flying key.

  • Position X: The X position of the keyer box.

  • Position Y: The Y position the keyer box.

  • Size X: Set the horizontal size of the keyer box.

  • Size Y: The vertical size of the keyer box.

  • Rotation: The rotation of the keyer box. Not all switchers support rotation.



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