Adobe 25510629 - After Effects CS3 Professional, Руководство пользователя

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Saving the finished video 121
Uncompressed options: 24-bit (standard) or 32-bit Keyed Source (preserves alpha
channel). For more information, see
“Outputting clips or stills with an alpha channel”
on page 122 . If you select 32-bit, then you also have the option to invert the alpha
channel for compatibility with applications that interpret alpha channels as film alpha
(0 means opacity) instead of video alpha (0 means transparency).
DV Video Encoder: Type 1 (file containing separate streams for audio and video
content) or Type 2 (single stream for audio and video). The most common type is
Type 2.
With Type 1, the multiplexed Audio-Video is kept in its original multiplexing and
saved together into the video section of the AVI file. This method has a relatively small
file size, but Windows applications based on the VfW API do not support it.
With Type 2, audio is saved as an additional audio stream into the file. This type is
supported by VfW applications, and has a larger file size.
5.
Select a resolution. Some codecs lock this option.
6.
Select a frame rate. The frame rates that are available vary depending on whether you are
working in NTSC mode or in PAL mode.
7.
Select a field order that’s compatible with the editing application. If you’re not sure which
field should be first, see the NLE’s documentation. Standard-definition video (such as
NTSC DV) is typically lower-field first, whereas many high-definition formats (such as
DVCProHD 1080i) are upper-field first.
8.
Enable the Flicker Filter if the composited scene contains high-contrast thin lines or other
patterns that may produce an unpleasant strobing effect in an interlaced video. Clothing
with a fine pattern is known to introduce this problem.
9.
Enter a name for the output movie in the File Name field.
10.
If you want the output movie saved to a path other than the path shown in the Folder field,
then click the Browse button, and set the desired path.
11.
Click the Save Output button to export the video. The status bar indicates what percentage
of the job is finished, and the Time Remaining field estimates how much longer it will take.
NOT
E
You may notice that one option on this control panel tab—aspect ratio—is not
included in this sequence of steps. That’s because you should have selected 4:3
or 16:9 when you created the session. Changing it at this point may require
repositioning layers and reprogramming virtual camera moves.