Apple Mac OS X Server v10.6 - Manual (Page 21)

Chapter 3 Configuring the Import Stage 21
Keynote Presentation—This picture-in-picture composition displays the screen Â
recording movie in full screen and hides the second movie. After 15 seconds (by
default) this composition minimizes the screen recording movie, moves it to the right,
and displays the second movie in the bottom-left corner of the screen. Finally, after 15
seconds (by default) the composition brings back the screen recording movie into full
screen and hides the second movie. This process repeats for the duration of the movie.
Overlay—This picture-in-picture composition displays the screen recording movie
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in full screen and overlays the second movie in the bottom-right corner of the
screen. Then, in response to conditions in the screen recording (for example, a slide
doesn’t change for more than 20 seconds) the location of the overlay is switched, if
transition detection is enabled. If transition detection is not enabled, both movies
remain in their original positions.
Overlay with Fade—This composition is similar to the Overlay composition, but
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instead of keeping the second movie in view all the time, this composition fades the
movie in and out at certain intervals (10 seconds by default).
Theater—This composition is similar to the Overlay composition, except that you
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always have a full view of the screen recording movie. This option is ideal if you
don’t want any part of the screen recording to be covered by the other movie.
4 If you want Podcast Composer to automatically detect transitions in the screen
recording movie, select Automatic Transitions.
With this option enabled, Podcast Composer can detect slide transitions in the movie
and use this information to determine when to switch movies in the composition.
If you choose not to automatically detect transitions, there will be no transition.
The selected dual source composition remains static. Both movies remain in their
original positions.
5 If you want Podcast Composer to automatically detect changes in the input movies
and use this information to assign chapters in the generated podcast, select Automatic
Chapter Generation.
For example, you might want chapters in the podcast to mark each transition to a
new slide.
In the case of a screen recording, the workflow inserts a chapter marker in the video
when it detects a slide transition or when no changes occur in the video for a certain
moment. This is useful when doing a screen recording or for any video that includes
presentations.
The tool used by the workflow to add chapter markers detects stability in a movie by
comparing frames. When the tool finds a stable sequence, it considers it a chapter.
Then, when the sequence changes to another sequence, the tool consider that change
a transition.
6 Click Done.
7 Choose File > Save.