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ADOBE AFTER EFFECTS 7.0
614
User Guide
About the Adobe Media Encoder
The Adobe Media Encoder is an encoding mechanism employed by programs such as Adobe Premiere Pro, Adobe
After Effects, and Adobe Encore DVD for output to certain media formats. Depending on the program, the Adobe
Media Encoder provides a specialized Export Settings dialog box that accommodates the numerous settings
associated with certain export formats, such as MPEG-1, MPEG-2, and those designed for delivering content over
the web. For each format, the Export Settings dialog box includes a number of presets that are tailored for particular
delivery media. You can also save custom presets that you can share with others or reload as needed.
Although the Export Settings dialog box's appearance varies slightly and it is accessed differently in each program,
its general form and function are consistent. The Export Settings dialog box always contains an area for specifying
general export settings (such as the Format, Range, Preset, and tracks to export) and an area with tabbed panels. The
types of tabbed panels available depend on the format and preset you specify. A panel menu also contains commands
specific to the selected format.
When exporting a movie file for delivery media other than full-screen, full frame-rate television, it is often necessary
to deinterlace the frames, crop the image, or apply certain filters. Through the Export Settings dialog box, the Adobe
Media Encoder offers these tasks as pre-rendering options, because it's best to perform them prior to encoding the
file. You can also specify post-encoding tasks, which include generating a log file or uploading the exported file to a
specified server automatically.
Adobe Media Encoder Filters options
Noise, grain, and similar artifacts can interfere with the efficient compression of images. For this reason, the size of
the final output file may in some cases be reduced by applying a noise reduction filter to an image or movie before
compression takes place.
In the Export Settings dialog box, you can specify whether to apply a noise reduction filter before compression, and
you can also set the amount of noise filtering to apply.
If you intend to remove noise and grain from your project for reasons other than reduction of compressed file size,
consider using the Noise & Grain effects in Adobe Premiere Pro or After Effects.
Adobe Media Encoder Video options
The options available in the Adobe Media Encoder Video tab depend on the format you specify in the Export
Settings area. Video settings include some or all of the following options:
Specifies the codec used to encode the video from those available on your system. The term codec is derived
Codec
from compressor/decompressor and coder/decoder.
Specifies the encoding quality. Generally, higher values increase rendering time and file size.
Quality
Conforms the output to the NTSC or PAL standard.
TV Standard
Scales the output frame's horizontal aspect to the specified width.
Frame Width
Scales the output frame's vertical aspect to the specified height.
Frame Height
The output frame rate for either NTSC or PAL formats.
Frame Rate
Specifies whether the output file's frames are interlaced, and if so, whether the upper or lower field is first
Field Order
in the scanning order. (See "About interlaced and noninterlaced video" on page 98.)
Specifies the ratio of each pixel's width to height, which determines the number of pixels required
Pixel Aspect Ratio
to achieve a given image aspect ratio. Some formats use square pixels, while others use nonsquare pixels.
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