Apple Final Cut Pro 5 User Manual download pdf (Page 276)

276 Chapter 16

yuvcolor yuvtint;

yuvtint = RGBtint;

yuvtint += 128;

offset128[ 1] = 128;

offset128[ 2] = 128;

colorTransform (Src1, Dest, RGBtoYUV, offset0, offset128);

channelFill(Dest, -1, -1, yuvtint.u, yuvtint.v);

ColorTransform (Dest, Dest,YUVtoRGB, offset128, offset0);

The ﬁrst two lines state the script’s name and type, and assign it to a group in the Browser.

This script is named “Tint.” It is a ﬁlter script and has been assigned to the group Image

Control. This means it can be found in the Browser’s Image Control bin.

filter “Tint”;

group “Image Control”

The third line speciﬁes the input control needed. In this case, all that is needed is a standard

color selection control. If more input controls were needed, they would appear in this part of

the script, on separate lines. This input control takes a number corresponding to the color

selected and places it in a variable called RGBtint.

All input controls place the result of the input into a variable, so that it can be used later on

in the script code.

input RGBtint, “Tint Color”, color, 0,0,0,0;

The next line shows where the actual script code begins. Every line that follows it is script

code:

code

The remaining lines are the code required to take the selected color and apply it to the video

by changing the colors in individual pixels of video. The ﬁnal line, which begins with the

word

channelFill, is the one that actually applies the selected color.

float offset0[ 3], offset128[ 3] ;