MACROMEDIA FLASH 8-DEVELOPING FLASH LITE 2.X User Manual download pdf (Page 16)

Adobe Flash CS3 Classroom in a Book

• With external FLV ﬁles, Flash document playback

does not have to be interrupted while the video ﬁle is

loading. Imported video ﬁles can sometimes interrupt

document playback to perform certain functions (for

example, to access a CD-ROM drive). FLV ﬁles can per-

form functions independently of the Flash document,

and so do not interrupt playback.

• Captioning video content is easier with external FLV

ﬁles because you can use callback functions to access

metadata for the video.

Working with Flash and After Eects

If you use Adobe Flash to create video or animation,

you can use After Effects to edit and reﬁne the video.

For example, you can export Flash animations and ap-

plications as QuickTime movies or Flash Video (FLV)

ﬁles. You can then use After Effects to edit and reﬁne

the video.

If you use After Effects to edit and composite video,

you can then use Flash to publish that video. You can

also export an After Effects video as Flash content for

further editing in Flash.

Exporting QuickTime video from Flash

If you create animations or applications with Flash, you

can export them as QuickTime movies using the File >

Export Movie command in Flash. For a Flash anima-

tion, you can optimize the video output for animation.

For a Flash application, Flash renders video of the

application as it runs, allowing the user to manipulate

it. This lets you capture the branches or states of your

application that you want to include in the video ﬁle.

Exporting Flash video (FLV) from After Eects

When you render ﬁnished video from After Effects,

select FLV as the output format in the render queue to

export directly to the Flash Video (FLV) format. This

launches the Flash Video Encoder application, which

provides size, compression, and other output options.

Any After Effects markers are added to the FLV ﬁle as

cue points. You can then import the FLV ﬁle into Flash

and publish it in a SWF ﬁle, which can be played by

Flash Player.

Importing and publishing video in Flash

When you import a FLV ﬁle into Flash, you can use

various techniques, such as scripting or Flash compo-

nents, to control the visual interface that surrounds

your video. For example, you might include playback

controls or other graphics. You can also add graphic

layers on top of the FLV ﬁle for composite effects.

Composite graphics, animation, and video

Flash and After Effects each include many capabilities

that allow you to perform complex compositing of

video and graphics. Which application you choose to

use will depend on your personal preferences and the

type of ﬁnal output you want to create.

Flash is the more Web-oriented of the two applica-

tions, with its small ﬁnal ﬁle size. Flash also allows for

runtime control of animation. After Effects is oriented

towards video and ﬁlm production, provides a wide

range of visual effects, and is generally used to create

video ﬁles as ﬁnal output.

Both applications can be used to create original graph-

ics and animation. Both use a timeline and offer script-

ing capabilities for controlling animation program-

matically. After Effects includes a larger set of effects,

while Flash’s ActionScript language is the more robust

of the two scripting environments. Both applications

allow you to place graphics and effects on separate layers

for compositing. These layers can be turned on and off

as needed.

In Flash, composites do not affect the video content

directly; they affect only the appearance of the video

during playback in Flash Player. In contrast, when you

composite with imported video in After Effects, the

video ﬁle you export actually incorporates the compos-

ited graphics and effects.

Because all drawing and painting in After Effects is

done on layers separate from any imported video, it is

always non-destructive. Flash has both destructive and

non-destructive drawing modes.

Exporting After Eects content for use in Flash

You can export After Effects content for use in Flash.

You can export a SWF ﬁle that can be played immediately

in Flash Player or used as part of another Flash project.

When you export content from After Effects in SWF for-

mat, the content is ﬂattened and rasterized in the SWF ﬁle.

LESSON 9

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