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Adobe After Effects CC - 2015 Manual

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Rendering and Exporting
Last updated 11/30/2015
6 Choose Custom from the Render Settings menu.
7 In the Render Settings pane, enable Field Rendering (choose the field order required by your output type), select any
option from the 3:2 Pulldown menu, and then click OK.
8 Choose the output type from the Render Queue Output Module menu (for example, Microsoft DV NTSC 32 kHz).
9 Specify a name and destination for the output file using the controls to the right of the Output To heading in the
Render Queue panel. (See
Specify filenames and locations for rendered output.)
10 Click the Render button to render your movie.
Scaling a movie down
Several methods exist for producing a reduced-size movie from your composition, each with tradeoffs between speed
and quality:
Nest the composition Create a new composition at the smaller dimensions, and nest the large composition inside it.
For example, if you create a 640x480 composition, place it in a 320x240 composition. Use the Fit To Comp command
to scale the composition to fit the new smaller composition size: Press Ctrl+Alt+F (Windows) or Command+Option+F
(Mac OS), and then collapse transformations by choosing Layer > Switches > Collapse. The resulting composition
rendered at full resolution and best quality will have excellent image quality, better than if you had rendered using a
reduced resolution.
Resize the composition This method produces the highest quality reduced-size movie but is slower than nesting. For
example, if you create a 640x480 composition and render it at full resolution, you can set the Resize value in the Output
Module Settings dialog box to 50% to create a 320x240 movie. For a composition rendered at full resolution, the image
quality is excellent when the Resize Quality is set to High.
Note: Do not use resizing to change the vertical dimensions of a movie when field rendering is on. Resizing vertically mixes
the field order, which distorts motion. Use either cropping or composition nesting if you need to vertically resize a field-
rendered movie.
Crop the composition This method is ideal for reducing the size of a movie by a few pixels. Use the Crop options in the
Output Module Settings dialog box. Remember that cropping cuts off part of the movie, so objects centered in the
composition may not appear centered unless the movie is cropped evenly on opposite edges.
Note: In some special cases, After Effects will automatically crop rather than scale when creating an output movie with
dimensions that don’t match the dimensions of the composition. For example, when creating a 720x480 movie with a pixel
aspect ratio of 0.91 or 1.21 from a 720x486 composition, After Effects will crop instead of scale.
Crop to a region of interest To render just a portion of the composition frame, define a region of interest in the
Composition panel. Then, select the Region Of Interest option in the Output Module Settings dialog box before
rendering. (See
Region of interest (ROI).)
Note: Cropping an odd number of pixels from the top of a field-rendered movie reverses the field order. For example, if you
crop one row of pixels from the top of a movie with Upper Field First field rendering, the field-rendering order then becomes
Lower Field First. Remember that if you crop pixels from the top of the movie, you need to add to the bottom row of the
movie to maintain the original size. If you don’t mind losing one scan line, this technique gives you a way to output two
movies from one render, each with a different field order.
Render the composition at a reduced resolution This method is the fastest for creating reduced-size movies. For
example, if you create a 640x480 composition, you can set the composition resolution to one half, reducing the size of
the rendered composition to 320x240. You can then create movies or images at this size. The reduced resolution reduces
the sharpness of the image and is best used for creating preview or draft movies.
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