Optimal video-splitting workflow on a mac:

  1. In Logic/QuickTime 7, figure out each of the ranges of video you want
  2. Open the movie in QuickTime 10
  3. Cmd + T to enter trim mode
  4. Set the handles to your range
  5. Cmd + shift + S to save as
  6. Close movie (export will continue)
  7. Repeat from 2 until complete