Apple Compressor 2 - Manual (Page 145)

Chapter 10 Creating MPEG-2 Output Files 145
MPEG-2 Transcoding Workflow
This section gives step-by-step instructions for setting your MPEG-2 attributes prior to
creating MPEG-1 output files with Compressor. Make your MPEG-2 settings from the
MPEG-2 Encoder pane by either modifying an existing setting or creating a new one in
the Settings tab of the Presets window. See the following steps for working with the
MPEG-2 output file format:
Example MPEG-2 Settings
The following MPEG-2 settings can be used for the most general MPEG-2 encoding
situations. Open the MPEG-2 Encoder pane and click the appropriate button to access
these tabs.
Note: Be aware that many of the settings shown in this example are not suitable for
all video input formats, nor for all encoding situations. Some alternative settings are
shown in parentheses where appropriate. See the sections at the beginning of this
chapter for details on how and when to use other settings.
Video Format tab
 Video Format: NTSC (PAL, 720p, 1080i-HDV, 1080i-Std, Automatic-SD, or Automatic-HD)
 Aspect Ratio: 4:3 (16:9 for anamorphic widescreen)
 Field Dominance: Automatic (not available for 720p)
Quality tab
 Mode: One pass VBR Best (Other one pass and two pass settings)
 Average Bit Rate: 5 Mbps (2 to 9 Mbps) for standard DVD
Note: Your choice of bit rate may be influenced by several factors, including the
complexity of your source video, the format and number of your audio streams, and
the total duration of all video clips to fit on your DVD.
 Maximum Bit Rate: 8.0 Mbps for standard DVD
 Motion Estimation: Best
GOP tab
 GOP Structure: IBBP
 GOP Size: 15 (12 for PAL and 50i, 50p, and 24p HD formats)
 GOP Type: Open (Closed)
Note: Your choice of GOP type (Open or Closed) may be influenced by whether and
how you create chapter markers for DVD authoring with DVD Studio Pro and whether
you intend to use multiple video angles in your title. See “
Adding DVD Studio Pro
Chapter Markers to a Clip ” on page 222 for more information.