Apple DVD Studio Pro 4 - Manual (Page 215)

When used in a menu, there may be issues for you to work with. For example, if the asset
is used in a menu also using overlays, you may have to readjust the button active areas
to match any changes you have made to the graphic. The same is true if you have made
changes to the layers of a multiple-layer PSD file.
Issues with Refreshing QuickTime Assets
Changes made to QuickTime assets, which can include video, audio, or both together,
can have large impacts on any project elements that use them.
Re-encoding
Any QuickTime assets you make changes to that have already been MPEG encoded by
the DVD Studio Pro integrated MPEG encoder will need to be re-encoded. If you have
enabled background encoding in the Encoding pane of DVD Studio Pro Preferences, this
re-encoding will start automatically.
Video Asset Length Changes
If you have changed the length of a video asset that is used in a track, there could be
audio sync problems if other assets are used in the same track. For example, making the
asset shorter would cause all video assets in the timeline that are placed after it to shift
earlier because the V1 stream cannot have any gaps in it. The corresponding audio does
not shift though, because audio streams can have gaps.
Making the QuickTime video asset longer does not change the clip in any tracks that use
it. You have to manually change the clip’s duration in the tracks to use the added video.
When used as backgrounds in motion menus, you may need to adjust the menu’s duration
to better fit with the asset’s new length.
Video Asset Content Changes
If you have changed the content of a video asset, you may need to adjust marker positions
to match the new content or, in the case of motion menus, adjust the loop point.
Audio Asset Length Changes
If you have changed the length of an audio asset that is used in a slideshow, there are
several issues that may arise.
• If the audio is assigned to a specific slide: That slide’s length will change.
• If the audio is assigned to the slideshow as overall audio and Fit to Audio has been
selected: The slideshow’s duration will change.
In both cases, if you have shortened the audio asset it is possible that the slide and
transition durations cannot be shortened enough to match the audio.
Making the QuickTime audio asset longer does not change the clip in any tracks that use
it. You have to manually change the clip’s duration in the tracks to use the added audio.
215 Chapter 11 Importing and Managing Assets