Datasheet

30 chapter 1 ■ Setting Up a Composite
Interlacing and 3:2 Pulldown in Nuke
Nuke 5.1 carries a hidden DeInterlace node. To access the node, press the X key to bring up
the Command Line window. With the Script radio buttons set to TCL, enter DeInterlace
in the cell and click OK (note the capitalization). A DeInterlace node is added to the Node
Graph. Connect the DeInterlace node to the output of a
Read node that carries interlaced footage. The interlacing
is removed. However, since the DeInterlace node carries
no adjustable parameters, the output may be scaled verti-
cally. To correct this, connect Transform and Reformat
nodes to scale and fit the output back to the project reso-
lution. For example, in Figure 1.31, interlaced HDTV
footage is imported. The DeInterlace node removes the
interlacing but stretches the footage vertically by 125%.
A Transform node is added with its Scale property set to
1,0.75. A Reformat node is included so that the result of the
Transform node is snapped back to the correct 1280
×720
bounding box size.
In addition, Nuke 5.1 includes two gizmo nodes for
working with pulldowns: Add 3:2 Pulldown and Remove
3:2 Pulldown. Both are found in the Time menu. Each
carries a Phase parameter, which you can use to offset the
fields incrementally. Various interlacing/deinterlacing plug-
ins and gizmos are available for Nuke. For example, the
FieldsKit gizmo is available at
www.creativecrash.com.
Tips & Tricks: Nuke Primitives
Nuke provides a number of primitives that are useful for testing networks or seeing the results
of particular filters. You can add a primitive to the Node Graph by RMB+clicking and choos-
ing either Image
→ node or Draw → node. The Image menu carries the Constant (solid color),
Checkerboard, and Colorbars (NTSC test pattern) nodes. The Draw node includes the Radial
(solid circle), Ramp (gradient), and Rectangle nodes.
AE and Nuke Tutorials
In this chapter’s tutorials, you’ll create new projects and scripts. In After Effects, you’ll
work with interlaced footage and in Nuke you’ll work with footage that has different
resolutions.
AE Tutorial 1: Working with Interlaced Footage
Working with interlaced video footage presents its own unique set of challenges.
1. Open After Effects. Choose File
→ New → New Project. Choose File → Project
Settings. In the Project Settings dialog box, select the Frames radio button in the
Display Style section. This consecutively numbers frames on the timeline. Note that
the Project Settings dialog box includes Depth (bit-depth) and Working Space (color
Figure 1.31 A
DeInterlace node
removes interlacing
with the help of
a Transform and
Reformat node.
A sample Nuke
script is included as
deinterlace.nk in
the Tutorials folder
on the DVD.
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