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MPEG is the name of a family
of digital audio and video standards specified by the ISO/IEC Moving
Picture Experts Group. MPEG standards include several keyframe-based
compression methods. It requires significant processing power and
time to generate MPEG files from other video formats.
- MPEG‑1
- Used for the Internet and CD‑ROM, providing picture quality
comparable with VHS quality at quarter-screen frame size.
- MPEG‑2
- Delivers higher quality video than MPEG‑1. A specific form
of MPEG‑2 was chosen as the standard for compressing video for DVD
video. This standard is called DVD‑compliant MPEG‑2.
MPEG‑2 compression is also used in HDV, and supported in the Blu-ray
Disc and HD‑DVD formats.
- MPEG‑4
- Includes many of the features of MPEG‑1 and MPEG‑2, and adds support
for interactivity. It offers better compression and reduces file
size while maintaining the same perceptual quality level as MPEG‑2.
MPEG‑4 part 10 (H.264, AVC) is used by the Blu-ray Disc and HD‑DVD
formats. For more information about MPEG-4, see “Overview of the
MPEG-4 standard” at www.chiariglione.org/mpeg/standards/mpeg-4/mpeg-4.htm.
The Adobe Media Encoder offers some MPEG presets to optimize
the output quality for various project types. If you’re experienced
with MPEG encoding, you can further fine-tune projects for specific
playback situations by customizing the presets in the Export Settings
dialog box.
In After Effects, you can create MPEG‑2 and MPEG‑2 DVD video.
In Adobe Premiere Pro, you can create various types of MPEG video
by using the File > Export > Media command.
Also, in Adobe Premiere Pro you can export directly to DVD‑compliant
video by using the File > Adobe Dynamic Link > Send
To Encore command. Any video you send to Encore is automatically
transcoded to MPEG‑2 if it isn’t already in that format.
 After Effects and Adobe Premiere Pro add metadata
to MPEG‑2 files that Encore can read for aid in authoring and building
DVDs. This metadata enables Encore to multiplex audio and video,
automatically generate DVD chapter points, and open clips in the
applications from which they were rendered. For more information,
see Encore Help.
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