Aperture may not recognize clips if the folder structure written by the camera to the card is altered. Avoid manually moving files away from the locations to which the camera wrote them originally. Leave the folder structure on the card as the camera wrote it. For more information on AVCHD formats Aperture supports, see Aperture 3.3: About AVCHD Support.
Aperture 3.3: AVCHD clips may not import if folder structure on card is altered
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