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Adobe After Effects CC - 2015 Manual

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Rendering and Exporting
Last updated 11/30/2015
When you export a composition to the XFL format from a 32-bpc project, the rendering of colors with values under 0
and over 1 does not produce results that preserve the appearance of the composition in After Effects. You should only
work in an 8-bpc or 16-bpc project when creating a composition that you intend to export to Flash Professional in XFL
format.
Audio is not exported to the XFL file.
Render and export a composition as a SWF file
SWF files are small files that play in Flash Player. They are often used to deliver animated vector graphics (such as
cartoons), audio, and other data types over the Internet. SWF files also allow viewer interaction, such as clicking to
follow a web link, control animation, or provide input to a rich internet application (RIA). SWF files are the output
created from FLA files.
While rendering and exporting a movie to a SWF file, After Effects maintains vector graphics as vector objects as much
as possible. However, raster images, blending modes, motion blur, some effects, and the contents of nested
compositions cannot be represented as vectors in the SWF file and are rasterized.
You can choose to ignore these unsupported items so that the SWF file includes only the After Effects features that can
be converted into native SWF elements, or you can choose to rasterize frames that contain unsupported features and
add them to the SWF file as JPEG-compressed bitmap images, which may reduce the efficiency of the SWF file.
Audio is encoded in MP3 format and added to the SWF file as an audio stream.
When After Effects creates a SWF file, it also saves a report ([SWFfile_name]R.htm) to the same folder as the SWF file.
The report also contains a link to the SWF file so that you can preview the output using the Flash Player plug-in. Open
the report in a browser to view the SWF file and see which items in the composition are unsupported.
The exported SWF file includes each unchanged item in the After Effects composition once, and then references it for
each use. If a layer is used in multiple frames, each use refers to the same object, even if the layer’s transform properties
(such as Position) are animated. However, if the content of the layer changes—for example, if a mask on the layer is
animated or if the source footage item for the layer is video—a new object is created for each frame in which the layer
is visible. If multiple layers in the composition share the same source footage item, the source is added once and is then
referenced for every additional layer that shares the source. If the source is an Illustrator file, a SWF movie clip is created
and referenced. Text characters are added as vectors once and then referenced on all subsequent frames, unless you
choose Fill Over Stroke from the Fill And Stroke options menu; in that case, the characters are added as vectors on every
frame.
Note: If color management is enabled for the project, then colors are converted from the working color space of the project
to the sRGB IEC61966-2.1 color space for output. This output color space is appropriate for movies shown in a web browser.
(See
Color management.)
1 Select the composition you want to export, and then choose File > Export > Adobe Flash Player (SWF).
2 Enter a filename (making sure to include the .swf extension) and location, and then click Save.
3 Specify options as appropriate, and then click OK.
Chris Jackson provides tips for rendering and exporting SWF files from After Effects in an excerpt from his book Flash
+ After Effects on the
Focal Press website.
SWF export settings
JPEG Quality Specifies the quality of rasterized images. The higher the quality, the larger the file. (If you select Rasterize
for Unsupported Features, the JPEG Quality setting is used for all JPEG-compressed bitmap images exported to the
SWF file, including bitmap images generated from composition frames or Adobe Illustrator files.)
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