White areas are solid (the foreground video is opaque), black areas are transparent (the foreground is not seen at all), and shades of gray indicate varying levels of transparency (the background video can be seen mixed with the foreground video).

Matte: Shows the grayscale matte, or alpha channel, that’s being generated by the keying operation. To help fine-tune the key, use the View options:Ĭomposite: Shows the final composited image, with the keyed foreground subject over the background clip. The Strength parameter is useful for retrieving areas of semitransparent detail such as hair, smoke, or reflections.

Increasing the Strength value expands the range of color sampled, resulting in more transparency in the keyed image. Reducing this value narrows the range of color sampled, resulting in less transparency in the keyed image. Select Composite (the left button) in the View area to see the foreground clip combined with the background clip.Īdjust how strongly the Keyer matches a color in the foreground image to the default chroma key color: Use the Strength slider to adjust the tolerance (core transparency) of the Keyer effect’s automatic sampling. Then use Sample Color to choose the color to remove. Make an Edges adjustment: Draw a line while holding down the Command key.ĭelete a Sample Color or Edges adjustment: Click a Sample Color rectangle or Edges line while holding down the Option key, or select the control and press the Delete key.Ĭhoose a different color if the Keyer effect chose the wrong color: Set the Strength parameter to 0% (to override the automatic initial color sampling).

Make a Sample Color adjustment: Draw a rectangle while holding down the Shift key. You can use the following keyboard shortcuts to work directly in the viewer: Refine any difficult areas, such as hair and reflections: Click the Edges thumbnail image in the Video inspector, draw a line across the difficult area in the viewer (with one end in the area to keep and the other in the area to remove), and drag the line’s handle to adjust the edge softness. This can make it much easier to see areas that are not keying well. Tip: Select Matte (the center button) in the View area in the Video inspector to see the matte that the chroma keyer is creating.

Remove green screen premiere