Apple DVD Studio Pro 4 - Manual (Page 73)

The Encoder Settings dialog appears with the same settings found in the Encoding
Preferences pane, with HD projects getting an added Resolution setting.
When you have the “Background encoding” method selected and you make any changes
in the Encoder Settings dialog, one of two things happens:
• If you change the bit rate setting: The current file, whether a complete or partially
complete file, is left as is and the encoder starts encoding a new file. This allows you
to compare the quality of the two bit rates. If you decide to continue the encoding of
the partially completed file, you can set the bit rate (and all other settings, if you have
made changes) to the value it used, and the encoder will continue encoding it.
Note: If the encoded files are being written to the project bundle, they are deleted
regardless of whether or not you change the bit rate setting.
• If you do not change the bit rate setting: The original asset is deleted, whether a complete
or partially complete file, and a new encoded file is created. For example, if you want
to see the difference between one-pass VBR and two-pass VBR encoding and want to
keep the files from both encoding sessions, you need to rename or move the completed
one-pass VBR encoded file before re-encoding with the two-pass VBR setting.
If you have the “Encode on build” method selected, these changes will apply once you
build your project.
Encoding Settings in HD Projects
Because an HD project can use assets with a wide variety of video resolutions, the Encoder
Settings dialog contains a Resolution pop-up menu that shows the asset’s resolution.
You are also able to change an asset’s video resolution by choosing a setting from the
Resolution pop-up menu.
SD resolution assets (720 x 480i and 720 x 576i) in HD projects can use a bit rate up to
15 Mbps. The Bit Rate setting in the Encoder Settings dialog will not go beyond 15 Mbps
when an SD resolution is chosen.
Important: Encoding an asset at a resolution other than its native resolution may result
in unacceptable artifacts appearing in the video.
How the Encoded Files Are Named
When you import QuickTime video assets into DVD Studio Pro, the integrated MPEG
encoder names the encoded files as follows:
• The first half is the complete original filename, including its extension.
• The second half has three parts—the video standard (NTSC or PAL), the encoding bit
rate (shown as a four-digit number), and the “.m2v” extension.
For example, if you import an asset named “Main Program.mov,” use the NTSC standard
and a bit rate of 5.5 Mbps, the MPEG-encoded filename will be “Main
Program.mov_NTSC_5500.m2v.”
73 Chapter 4 Preparing Video Assets