Adobe Media Encoder Basics - Adobe 65021048 User Manual

• Work at an aspect ratio consistent with mobile output. New project presets (available only on Windows) make
this easy. The frame dimensions are larger than the ultimate output size (working at 176 x 144 can be difficult, for
example, for titling), but they match the output-frame aspect ratio to facilitate easy encoding. Each Windows
project preset renders to uncompressed video, but most computers can manage the data rate at these reduced
frame sizes and halved frame rates. (This process is for projects where the only output is for mobile devices.) Two
frame aspect ratios account for the majority of support in mobile devices: 4:3 (QVGA, VGA etc.) and 11:9 (CIF,
QCIF, Sub-QCIF). These two common project settings are included in the Adobe Media Encoder "Mobile &
Presets" folder.
Note: Do not use the device data in Device Central to determine how to configure a custom preset. Device Central does
not have information about video or audio support (frame sizes, codecs, bit rates, and so on). The frame size data in
Device Central refers to screen size and wallpaper and screen saver sizes, which are different from video sizes.
For more tips and techniques for creating content for mobile phones and devices, see
www.adobe.com/go/learn_cs_mobilewiki_en.

Adobe Media Encoder basics

About the Adobe Media Encoder
The Adobe Media Encoder is an encoding mechanism employed by programs such as Adobe Premiere Pro, After
Effects, Soundbooth, and Encore 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-2, Adobe Flash Video, and H.264. 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, which you can share with others or reload as needed.
Although the Export Settings dialog box's appearance varies slightly and is accessed differently in different software,
its general form and function are consistent. The Export Settings dialog box always contains a section for general
export settings (such as Format and Preset) and one or more tabbed sections. The sections available depend on the
format and preset you specify. The tab menu also contains commands specific to the selected format.
When you export a movie file for delivery media other than full-screen, full frame-rate television, you usually need
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-encoding 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.
About the Export Settings dialog box
Adobe Media Encoder can encode a sequence to any of a wide variety of compressed video formats.
The Export Settings dialog includes a large image area where you can toggle between Source and Output tabs. The
Source tab allows you to see the source video and apply cropping options interactively. The Output panel includes
a deinterlacing feature, and indicates how the clip's frame size and pixel aspect ratio (PAR) appear after processing.
Under each view's image, there is a time display and a time ruler. The time ruler includes a current-time indicator
and a viewing area bar. Other tabs include various encoding settings, depending on the selected format.
April 1, 2008
ADOBE PREMIERE PRO CS3 416
User Guide