Apple Shake 4 Tutorials Uživatelský manuál stáhnout pdf (Strana 176)

176 Chapter 5 Using Keylight

To begin the composite:

1 Add an Image–FileIn node, then load the saint_fg.1-5#.jpg and saint_/jointfilesconvert/1578512/bg.1-5#.jpg image

sequences.

The first thing you notice is that these are anamorphic frames, so everything is

squeezed. Additionally, the element is originally a scanned Cineon plate, so it is in

logarithmic color space. First, focus on the aspect ratio issue.

2 In the Globals tab, open the useProxy subtree and set the proxyRatio to 0.5.

Note: You can also set the proxy in the useProxy value field as 1, 0.5.

The images are squeezed by half in the Y axis.

This squeezing can be turned on and off very quickly with the proxy button in the

upper-right corner of the Shake interface. “Other” (highlighted in green) indicates that

you are using a custom proxy setting rather than a preset (P1, P2, P3). The proxy scaling

is just temporary while you work with the script. When finished with the composite, set

the proxyRatio back to 1.

The Joy of JPEG

Never use JPEG images for any footage you have to key. The compression causes

major problems, as you will find in this tutorial. Also, do not use JPEG images for

video interlaced footage, as the fields become corrupted.

proxyRatio = 1 proxyRatio = 0.5

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Apple Shake 4 Tutorials Uživatelský manuál Strana 176