When previewing the clips in the bin PRIOR to importing, everything looks great, and both Audio & Video run at realtime speed, but AFTER importing, the VIDEO is running at what appears to be 200%, audio is perfect... Help, please!
Please give complete information about your format and camera. You might also do a forum search. I think there is a similar discussion a few inches below yours.
Please start a new thread as this is not related to AVCHD. Please give your full specifications in addition to the camera, exact format you're shooting, settings you're using in FCE, computer, hard drives, how everything connected, version of FCE, OS and QuickTime.