Digital video motion analysis: Editing

Edit your digitized video shots into short segments containing only the motion you want to analyze (using MoviePlayer extended by the QuickTime Pro software).

• Open the "MoviePlayer" application (you can find it in under the Miscellaneous submenu on the Apple menu).
• Select "Open" under the "File" menu and find one of the shots iMovie stored for you (recall that these are in the "... Media" folder associated with your movie. The individual shots should have the names you gave them in iMovie.
• Click through the movie using the arrow buttons until you have identified the beginning of the part of the shot you want to analyze. Hold down the shift key while clicking the forward button to select the rest of the shot you want (the selected shot is represented by the shaded portion of the slider control in the movie window).
• Do the following sequence to save that part of the shot as its own QuickTime file: Copy, New, Paste, Save As... [shortcut: hold down the Apple key and type c,n,v then select Save As.. under the "File" menu]. There are two options:
  • Select "Make Movie Self-Contained", give it a new name and select a different folder to save the new file. Do this if you intend to transfer the video file to another computer or put it on the Web (note that then your shot is independent from the original iMovie files, as long as you save it in a different folder).
  • Select "Save normally" to just save editing information about the video you have selected; do this if you only intend to analyze or view the movie on the "All-in-one" computer (note that you have to save the original iMovie files if you choose this option).
• Once you have saved your edited shots, you can quit MoviePlayer.

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