Apple Final Cut Pro 7 - Manual (Page 1460)

Compositing in Y
′
C
B
C
R
and RGB Color Spaces
Many compositing operations in Final Cut Pro work the same way in Y
′
C
B
C
R
as they do in
RGB. However, in some cases, slightly different results may occur. This is because the
Y
′
C
B
C
R
and RGB color spaces are not identical, and some compositing operations that
generate highly saturated colors may show different clamping behavior in Y
′
C
B
C
R
than
they do in RGB.
For example, using the Add composite mode to combine 75 percent cyan and 75 percent
white will “clamp” to white in RGB, but to a bright cyan color in Y
′
C
B
C
R
. For this reason,
it’s important to verify the results of the composite by doing a test render in the color
space you will do the final render in.
For more information about limiting Y
′
C
B
C
R
and RGB values, see “Using the Broadcast
Safe Filter” and “Using the RGB Limit Filter.”
Changing Video Processing Settings
You can change video processing settings for an individual sequence, or you can change
video processing settings for a sequence preset.
To change video processing settings for an individual sequence
1 Choose Sequence > Settings, then click the Video Processing tab.
2 Select the appropriate options, then click OK.
For a detailed description of options in the Video Processing tab, see the following sections:
• “About Color Space and Bit Depth Settings”
• “Maximum RGB White Level Settings”
• “Motion Filtering Quality Pop-Up Menu”
To change the default video processing settings for a sequence preset
1 Choose Final Cut Pro > Audio/Video Settings, then click the Sequence Presets tab.
2 Double-click a sequence preset in the list of presets.
The Sequence Preset Editor window opens.
3 Click the Video Processing tab, then choose the appropriate settings.
About Color Space and Bit Depth Settings
These options determine the color space and video bit depth used for rendering and
real-time playback.
1460 Chapter 85 Rendering and Video Processing Settings