Apple DVD Studio Pro 4 - Manual (Page 393)

You can protect a stream from accidental changes by clicking its lock icon. When it is
open (unlocked), you can make changes to the stream; when the lock is closed, you can’t.
You can still select it for previewing and assign a language to it, but you cannot make
any changes to its clips.
To lock all streams
µ
Choose Project > Timeline > Lock All Streams (or press Shift-F4).
Exporting an MPEG Clip
You can export the contents of the V1 stream as an MPEG file. This can be useful in some
situations:
• If you have a long video asset and want to make a separate asset of a small part of it,
you can add the asset to the stream, trim it to the size you want, and export it as a new
asset. You can use this asset as you would any other asset. For example, you could use
it as a menu background.
• You can edit multiple assets into the stream, and then export them as a single MPEG
file.
Note: You cannot export the stream as an MPEG file if the stream contains still images
or uses H.264 format clips.
To export an MPEG file from the V1 stream
1 Configure the stream as needed.
2 Do one of the following:
• Choose File > Export > MPEG File.
• Control-click the stream, then choose Export MPEG File from the shortcut menu.
3 Enter a name and select a destination for the file in the Save Stream dialog that appears,
then click Save.
When exporting a large asset, be sure you have sufficient disk space to hold the file.
Working with Markers
You can add up to 255 markers to a track, although a maximum of 99 can be set as chapter
markers. Each marker has its own properties that define its purpose. Markers can be used
to:
• Identify chapter points that the viewer can skip to when viewing the title
• Define when buttons appear over the video stream
• Identify the dual-layer break point when creating dual-layer projects
• Identify points in the stream that can be accessed by buttons and scripts
393 Chapter 17 Creating and Editing Tracks