Have you already tried to convert your video to another format + import it again? (wmv, mov)
Is your video in the H.264 encoding format?
Btw, please bump your threads just when you havent got an answer within 4 days 
Have you already tried to convert your video to another format + import it again? (wmv, mov)
Is your video in the H.264 encoding format?
Btw, please bump your threads just when you havent got an answer within 4 days