Apple Logic Pro 9 - Manual (Page 1151)

Video track settings can be adjusted in the Video preferences window.
For further details about these preferences, see Video Preferences in Logic Pro .
Working with Movie Scene Markers
Scene markers are SMPTE-locked markers: they remain at the same absolute time position,
regardless of any tempo changes, and they are automatically deleted if the current movie
is removed from the project. Scene markers are identified by a movie frame symbol.
Creating and Deleting Movie Scene Markers
You can use the Create Movie Scene Markers function to search the movie for significant
content changes (scene cuts), and automatically generate scene markers for each of them.
The Create Movie Scene Markers function uses a fixed threshold value, which works quite
well for most types of movies (cartoons, real life, CGI, and so on).
1151 Chapter 38 Working with Video