From Page 257 of the FCE-HD User Manual PDF:
http://manuals.info.apple.com/en/Final_Cut_Express_HD_User_Manual.pdf
Automatically Creating Subclips Using DV Start/Stop Detection DV formats allow you to create subclips automatically from start/stop metadata that is embedded in video frames each time you stop and start the camcorder. This DV start/ stop metadata is captured and stored in the media file. Final Cut Express HD can identify the location of each start/stop marker (sometimes referred to as an embedded flag) to automatically place markers in a clip. These markers can then be used to create subclips. Note: DV start/stop metadata is not timecode. It is independent time-of-day metadata recorded within the video data of your footage. When the time-of-day information jumps dramatically from one shot to the next, Final Cut Express HD recognizes that the shot has changed and can place a marker at that point in the clip. To break a long DV clip into subclips based on starts and stops: 1 Capture a long clip from a DV tape containing several starts and stops. 2 Do one of the following: Â Select the clip in the Browser. Â Open the clip in the Viewer. 3 With the Viewer active, choose Mark > DV Start/Stop Detect. Note: If you have any exceptionally long clips, you can break these up further by adding a few more markers manually. For more information, see Using Markers on page 235. 4 Switch the Browser to list view and locate the clip you were working on in the Viewer. For more information, see Choosing Views in the Browser on page 70. 5 Click the disclosure triangle to view the clips markers.