Adobe AFTER EFFECTS CS3 PROFESSIONAL User Manual page 88

In the Fields and Pulldown section, select Upper Field First or Lower Field First from the Separate Fields menu.
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Do one of the following and click OK:
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• If you know the phase of the 3:2 or 24Pa pulldown, choose it from the Remove Pulldown menu.
• To have After Effects determine the correct settings, click Guess 3:2 Pulldown or Guess 24Pa Pulldown.
Note: If your footage file contains frames from different sources, the phase may not be consistent. If this is the case, import
the footage multiple times, once for each phase, and interpret each footage item with a different setting. Then, add each
footage item to your composition and trim each layer to use only the appropriate frames.
Importing AAF and OMF files (Windows only)
AAF (Advanced Authoring Format) is a multimedia file interchange format that contains all of the editing decisions
of a project from a non-linear editor (NLE). Using AAF, you can exchange NLE projects between platforms, systems,
and applications. AAF files do not contain media, such as video and audio; rather, they contain editing decisions and
links to media.
OMF (Open Media Framework) is an extensible, object-oriented format that provides a means of tracking
production and post-production information. Unlike AAF files, OMF files can contain media as well as project
information. An AAF file may link to an associated OMF file as a media source. When you import an AAF file that
references an OMF file, the OMF footage is also imported. After Effects imports only raw (essence) OMF files, which
are OMF files that have embedded media and no project information. After Effects doesn't import OMF project files.
You can use an application such as Automatic Duck to import OMF project files on Windows or Mac OS.
Note: You can also output to OMF. See "Render a composition to OMF (Windows only)" on page 616.
The following OMF codecs are supported for importing and outputting to OMF: Uncompressed, Avid AVR, Avid
JPEG, JFIF, and DV.
The OMF file format supports video only. Avid editing systems store audio files as separate .wav files, which you can
import into After Effects if desired. Depending on the resolution and codec, each frame may be composed of a full
noninterlaced frame, two interlaced fields, or a single line-doubled field (for single-field media). The codec used to
encode the media is displayed in the footage information area in the Project panel.
To ensure that the project that you want to import conforms to general AAF specifications and is compatible with
After Effects, consider the following:
Character limits for names
to 31 characters, the maximum limit in After Effects. Names for items in the Project panel and for layers in the
Timeline panel are also truncated to 31 characters.
Platform-specific footage references
AAF file.
Separate video and audio tracks
imported into After Effects, each clip is converted into a layer. For an audio clip, only the audio switch is enabled for
the layer. For a video clip, only the video switch is enabled for the layer.
Clips that appear on the same track in Avid appear as separate layers in After Effects.
Clips on the same track
Depth order of video and audio tracks
converted audio layers will appear above video layers in the After Effects Timeline panel.
Different image dimensions and pixel aspect ratios
dimensions of the project regardless of the original dimensions of the footage. When the AAF file is imported into
The folder name (based on the AAF file name) created in the Project panel is truncated
Footage references are saved with platform-specific paths and file names in the
An AAF file can have separate clips for audio and video. When the AAF file is
During AAF import, video tracks are processed before audio tracks, so
When an Avid editing system imports footage, it is scaled to the
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