i have an avi video file which i extracted from my camera... the color is perfect as it is... i want to edit it so i import it into imovie...i do simple cutting and pasting edits, no color changes no contrast changes, etc. but when i try to export the movie after the edits no matter what file i import it as (mov, avi, etc.) the color most always changes and looks way darker than the original. why is this??? any tips on how to avoid this color change?