Handleiding Adobe After Effects CC - 2015 (pagina 732 van 761) (Engels)

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Rendering and Exporting

Last updated 11/30/2015

If you choose such a constrained output format, and your composition, its render settings, or its output module settings

don’t match the constraints, then After Effects shows a yellow warning icon

and the message “Settings mismatch” at

the bottom of the Output Module Settings dialog box.

Click the warning icon to see a detailed message that describes how the output file will be modified to meet the format

constraints. You can go back and change composition settings, render settings, and output module settings if you don't

want After Effects to make the changes automatically in the output module.

For more information about output module constraints and the warnings for mismatches in frame rate, dimensions,

and pixel aspect ratio, see the

Adobe website.

Encoding and compression options for movies

Compression is essential for reducing the size of movies so that they can be stored, transmitted, and played back

effectively. Compression is achieved by an encoder; decompression is achieved by a decoder. Encoders and decoders

are known by the common term codec. No single codec or set of settings is best for all situations. For example, the best

codec for compressing cartoon animation is generally not efficient for compressing live-action video. Similarly, the best

codec for playback over a slow network connection is generally not the best codec for an intermediate stage in a

production workflow. For information on planning your work with final output in mind, see

Planning your work.

After Effects uses an embedded version of the Adobe Media Encoder to encode most movie formats through the

Render Queue panel. When you manage render and export operations with the Render Queue panel, the embedded

version of the Adobe Media Encoder is called automatically. The Adobe Media Encoder appears only in the form of the

export settings dialog boxes with which you specify some encoding and output settings.

Note: The embedded version of the Adobe Media Encoder used to manage export settings within After Effects output

modules does not provide all of the features of the full, stand-alone Adobe Media Encoder application. For information

about the full, stand-alone Adobe Media Encoder application, see

Adobe Media Encoder Help .

For most output formats, you can specify format-specific encoding and compression options. In many cases, a dialog

box opens and presents these options when you choose a format to export to or click the Format Options button in the

Output Module settings dialog box. (See

Output modules and output module settings.)

Note: In After Effects CC 2014, formats such as H.264, MPEG-2, and WMV have been removed from the Render Queue

because Adobe Media Encoder gives better results. Use Adobe Media Encoder to export to these formats.

QuickTime (MOV) encoding and compression settings

1 In the Render Queue panel, click the underlined name of the output module.

2 Choose QuickTime from the Format menu.

3 Click Format Options in the Video Output section.

4 In the QuickTime Options dialog box, choose a codec and set options according to the specific codec and your

needs:

Quality A higher Quality setting produces better image quality but results in a bigger movie file.

Key Frame Every In QuickTime terminology, the term key frames refers to something different from the change-

over-time keyframes placed in the After Effects Timeline panel. In QuickTime, key frames are frames that occur at

regular intervals in the movie. During compression, they are stored as complete frames. Each intermediate frame

that separates them is compared to the previous frame, and only changed data is stored. Using key frames greatly

reduces movie size and greatly increases the memory required to edit and render a movie. Shorter intervals between

key frames enable faster seeking and reverse playback, but can significantly increase the size of the file.

Frame Reordering Some codecs allow for frames to be encoded and decoded out of order for more efficient storage.

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