Adobe ENCORE 2 Manual page 69

•
TIFF
Supported video file formats
You can import any of the following types of video files:
•
AVI
•
MPEG-2 (including MPG, MPV, and M2V)
•
QuickTime (MOV; including Reference Movies)
Video must conform to one of the following frame rates and frame sizes, depending on the TV standard you plan to
use for the project:
Standard
Frame rate (frames per second)
Frame size (pixels)
*Transcoded on import to convert to 29.97
Advantages of transcoding before or after import
A DVD player can play only video that conforms to DVD standards (called DVD-compliant). However, video does
not need to be DVD-compliant before you import it (though it does need to have the correct frame rate and frame
size). Adobe Encore DVD includes a transcoding engine that can compress (or transcode) files for DVD playback.
You can transcode video before you import it (in a video-editing application), on import, or when you are ready to
build the DVD.
Whether you transcode before or after import is up to you. Adobe Encore DVD handles both transcoded and
untranscoded files equally well.
Importing transcoded DVD-compliant content allows you to work with the exact assets that will appear on the DVD.
Also, because the content is already DVD-compliant, the time it takes to build the project will be reduced.
Note: In certain instances, Adobe Encore DVD needs to transcode DVD-compliant files. For example, if the data rate of
a DVD-compliant file is too high for the amount of content, the program transcodes the file to bring its data rate down.
Allowing Adobe Encore DVD to transcode your content gives you more flexibility in placing chapter points (markers
within the timeline of the video), inserting subtitles, and trimming your files. The MPEG-2 compression scheme
used in transcoding divides the footage into chunks, called a Group of Pictures (GOP). Once transcoded, you can
place chapter points and trim only at the header of each GOP, not at specific frames within the group. If you haven't
transcoded the file, you are not restricted by GOP headers. In addition, when Adobe Encore DVD does transcode
the file, it creates GOP headers at every chapter point you set. (See "To add chapter points to timelines" on page 139.)
Nontranscoded files also give you more flexibility at build time. In large projects, you often need to adjust the video
data rate to fit all the video and audio assets on the DVD. If a file is already transcoded, you might have to transcode
it again at a lower data rate, or lower the data rate of the other content to reduce file size.
NTSC PAL
29.97 25
23.976*
23.978*
24*
720 x 480 720 x 576
720 x 486 704 x 576
704 x 480
ADOBE ENCORE DVD 2.0 64
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