Handleiding Adobe After Effects CC - 2015 (pagina 758 van 761) (Engels)

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Rendering and Exporting

Last updated 11/30/2015

Note: When rendering at reduced resolution, set the quality of the composition to Draft. Rendering at Best quality while

reducing resolution does not produce a clean image and takes longer to render than rendering at Draft quality.

Scaling a movie up

Increasing the size of the output from a rendered composition reduces the image quality of a movie and is not

recommended. If you must enlarge a movie, to maintain highest image quality, enlarge a composition that was rendered

at full resolution and highest quality using one of the following methods:

Nest the composition Create a new composition at the larger dimensions and nest the smaller composition inside it.

For example, if you create a 320x240 composition, you can place it in a 640x480 composition. Resize the composition

to fit the new larger composition size, and then collapse transformations by choosing Layers > Switches > Collapse. The

resulting composition rendered at full resolution and best quality will have better image quality than if you had resized

the movie. However, this method also renders slower than if you created a composition and resized it.

Note: To create a draft movie with specific dimensions, use both the Resize option and reduced resolution in the rendered

composition.

Resize the composition For example, if you create a 320x240 composition and render it at full resolution, you can set

the Resize value in the Output Module Settings dialog box to 200% to create a 640x480 movie. For a composition

rendered at full resolution, the image quality is usually acceptable.

Note: Do not use resizing to change the vertical dimensions of a movie with field rendering. Resizing vertically mixes the

field order, which distorts any motion. Use either cropping or composition nesting if you need to vertically resize a field-

rendered movie.

Crop the composition To enlarge a movie by a few pixels, increase the size using negative values for the Crop options

in the Output Module Settings dialog box. For example, to increase the size of a movie by 2 pixels, enter –2 in the

Cropping section of the Output Module Settings dialog box. Remember that negative cropping adds to one side of a

movie, so objects originally centered in the composition may not appear centered when the movie is cropped.

Note: Adding an odd number of pixels to the top of a field-rendered movie reverses the field order. For example, if you add

one row of pixels to the top of a movie with Upper Field First field rendering, the field-rendering order then becomes Lower

Field First. Remember that if you add pixels to the top of the movie, you need to crop from the bottom row of the movie to

maintain the original size.

Adobe Photoshop provides fine control over resampling methods used for scaling of images. For fine control of

resampling, you can export frames to Photoshop to change the image size and then import the frames back into After

Effects.

For a list of plug-ins that provide high-quality scaling—including some designed to create high-definition images from

standard-definition sources—see the

Toolfar m website.

For a script that scales multiple compositions simultaneously, see the AE Enhancers forum.

Create a composition and render source footage items simultaneously

You can simultaneously create a composition from source footage and prepare it for rendering. This process is useful

when you want to change some characteristic of the source footage, such as frame rate or compression method, and

have that rendered version available in your project.

1 Drag one or more footage items from the Project panel to the Render Queue panel, or select the footage items in the

Project panel and do one of the following:

• Choose Composition > Add to Render Queue.

• Press Ctrl+Shift+/ or Ctrl+M(Windows) or Command+Shift+/ or Command+M (Mac OS).

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