ADOBE AFTER EFFECTS 7.0
User Guide
622
• For Microsoft Video 1, choose a level for the temporal compression quality of the movie. Temporal compression
compresses a movie by comparing successive frames and keeping only changed data. High temporal quality
maintains smoothness of motion. Lower temporal quality tends to produce jerkiness of motion because a pixel
doesn’t change unless the difference between frames is great.
7 If you want the smallest possible files, and your compressor choice allows for a key frame rate, select the Key
Frame Every option and type a number of frames. Generally, you should type a number equal to the frame rate. For
example, if you set a frame rate of 30 fps, type 30 in the Key Frame box. This sets one keyframe every 30 frames of
your movie.
Note: IfyouaregoingtousetheresultingmovieinanotherAfterEffectscomposition,typeasmallvalue(lessthan5)in
the Key Frame Every field or deselect the Key Frame Every option. The presence of keyframes greatly increases the
memory required to edit and render a movie.
8 Click OK.
9 If your compressor choice supports different image color depths, choose the appropriate color depth in the Output
Module Settings dialog box.
10 Choose other options in the Output Module Settings dialog box. (See “To change output module settings” on
page 607.) Then click OK.
Video for Windows compression options
Microsoft RLE Use for lossless compression limited to 256 colors.
Microsoft DV Use for digital video camcorders.
Intel Indeo/Microsoft Video Use when compressing video for playback from CD.
No Compression Use for a depth setting of Millions of Colors+ when an alpha channel is required.
Cinepak Use when compressing 16-bit and 24-bit video for playback from CD or for desktop presentations. For best
results, use the Cinepak compressor on raw source data that has not been previously compressed with a highly lossy
compressor. Note that this is a slow compression method. With Cinepak, decompression is much faster than
compression,andthedatarateforplaybackcanbedefinedbytheuser.However,youcannotsaveanalphachannel
using the Cinepak compressor.
Exporting footage using QuickTime components
Exporting using QuickTime
If you have QuickTime 6.0 or later installed on your system, you can export footage using components provided by
QuickTime. This rendering process exports footage directly without using the Render Queue panel in After Effects.
Compositions are exported using the Composition panel’s current quality and resolution settings, and only the work
area indicated in the time ruler is exported.
Note: You can also render to QuickTime by using the Render Queue panel. However, some QuickTime options, such as
Fast Start and Hinted Streaming, are available only through the QuickTime exporter.
The specific file formats you can export to depend on how you’ve configured QuickTime. If you install new export
modules as they become available from Apple or other third parties, those modules appear in the File > Export
submenu in After Effects. With this QuickTime support, you can export AVI files on both platforms or prepare
streaming video and audio for web distribution. If you want to apply QuickTime effects, you can do so during export.
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