User Guide

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ADOBE AFTER EFFECTS 5.0
User Guide
7 Using the Frame Advance button ( ) on the Time Controls palette, step forward at least
five frames in the Footage window. Moving areas should move consistently in one direc-
tion. If the moving areas move backward every other frame, the wrong field-separation
option has been applied to the footage.
Note: Analog capture cards can vary. DV or footage captures from IEEE 1394 FireWire/i.Link
are always lower field first.
Field rendering
When you render a composition containing separated footage, set the Field Rendering
option to the same field order as your video equipment. If you don’t field-render the
composition, or if you field-render with the incorrect settings, the final movie may appear
too soft, jerky, or distorted. See “Testing the field-rendering order” on page 387.
Removing 3:2 pulldown from video transferred from film
When you transfer 24-fps film to 29.97-fps (NTSC) video, you use a process called 3:2
pulldown, in which the film frames are distributed across video fields in a repeating 3:2
pattern. It’s important to remove 3:2 pulldown from video footage that was originally film,
so that effects you add in After Effects synchronize perfectly with the original frame rate of
film. Removing 3:2 pulldown reduces the frame rate by 4/5: from 30 to 24 fps or from 29.97
to 23.976 fps, which also reduces the number of frames you have to change. To remove 3:2
pulldown, you must also indicate the phase of the 3:2 pulldown. For more information on
3:2 pulldown, see online Help.
Before you remove 3:2 pulldown, separate the fields as either upper-field first or lower-
field first. Once the fields are separated, After Effects can analyze the footage and deter-
mine the correct 3:2 pulldown phase and field order. If you already know the phase and
field order, choose them.
Note: If your footage file contains frames from different sources, the phase may not be consis-
tent. If this is the case, import the footage once for each phase. Then, add the footage to your
composition as many times as there are phases and trim each layer to use only the appropriate
frames for each phase.
To remove 3:2 pulldown from video transferred from film:
1 In the Project window, select the footage from which you want to remove 3:2 pulldown.
UG.book Page 87 Wednesday, February 21, 2001 12:05 PM