Apple Final Cut Pro X 10.1.2 User Guide

 Chapter 10    Advanced editing 3 51
In the case of video-only or audio-only cuts and switches, the edit point can be mixed (with 
both black and white dotted lines). For example, when you cut and switch video only, you see 
a black dotted line for the video and a white dotted line for the audio. 
Black dotted lines indicate that different angles from the same multicam clip are 
on either side of the edit point.
A white dotted line indicates 
that the same angle is on 
either side of the edit point....

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Switch angles in the Inspector
Switching angles in the Inspector allows you to switch angles for multiple selected multicam 
clips at once.
 1 Select one or more multicam clips that you want to switch.
 2 Open the Info inspector.
 3 In the Info inspector, do one of the following:
 •To switch the video angle: In the Active Video Angle pop-up menu, choose the angle you want 
to switch to.
 •To switch the audio angle: In the Active Audio Angle pop-up menu, choose the...

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 •If performance becomes an issue while you’re working on a multicam project, do any of the 
following: 
 •Set Final Cut Pro to use proxy media by choosing Proxy in the Media section of the Viewer 
Options pop-up menu (in the upper-right corner of the Viewer). Proxy playback allows you 
to play back more angles at a time. To use proxy playback, you must have proxy versions of 
your media available, or you must create proxy versions. For more information, see Manage...

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Keying
Keying overview
There are times when you need to combine two clips to create an image with bits of both. A 
common way to combine two clips is to use a keying process, where the video of the top, or 
foreground, clip is processed to eliminate either a color or luma value in areas of the video and 
then is combined with the bottom, or background, clip.
For example, keying allows you to take a video clip of a person standing in front of a green 
background and replace that green with a street...

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Use chroma keys
A challenging part of creating a good chroma key is shooting the chroma key video, and in 
particular, using a good, well-lit background that provides a uniform color to remove. A wide 
variety of specialized chroma key background options are available, from chroma key paint 
that includes highly reflective additives to chroma key cloth or paper sheets. Additionally, it is 
important to use the best camera you can access and avoid using a highly...

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 3 Select the foreground clip in the Timeline, and click the Effects button in the toolbar.
Tip:  For best results, also position the playhead at a point within the foreground clip that shows 
the maximum amount of the color to be keyed.
 4 In the Effects Browser, select the Keyer effect.
Tip:  Type “keyer” in the Effects Browser’s search field to quickly find the Keyer effect.
 5 Do one of the following:
 •Drag the effect to the Timeline foreground clip to which...

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Note:  By default, the Keyer effect applies spill removal, which causes any leftover fringing of 
the blue- or green-screen background color you’re making transparent to appear as gray. To 
see the original color, set the Spill Level parameter to 0%.
Drag over an area where the chroma key color 
is not being removed.
To improve the key, you can drag the rectangle to adjust its position or drag its corners to 
change its size, and you can drag additional...

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 •To choose a different color if the Keyer effect chose the wrong color: Set the Strength parameter 
to 0 (to override the automatic initial color sampling). Then use Sample Color to choose the 
color to remove. Select Composite (the left button) in the View area to see the foreground clip 
combined with the background clip.
 •To adjust how strongly the Keyer matches a color in the foreground image to the default chroma 
key color: Use the Strength slider to...

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 6 To suppress any of the background color that is appearing (spilling) on the foreground image, 
adjust the Spill Level control.
 7 To reverse the keying operation, retaining the background color and removing the foreground 
image, select Invert.
 8 To mix the keyed effect with the unkeyed effect, adjust the Mix control.
For information about making advanced chroma key adjustments, see the following instructions.
Make advanced chroma key adjustments
The...

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 •Scrub Boxes: Select to limit the Chroma and Luma controls to adjusting softness (edge 
transparency) in the matte you are creating. In this mode, you cannot manually adjust 
tolerance (core transparency), which is determined by the Keyer effect’s automatic sampling, 
plus any Sample Color rectangles you’ve added in the Viewer. ( To increase matte tolerance, 
add more Sample Color rectangles or adjust the Strength slider.)
 •Manual: Select to use the Chroma and...