hell0,. trying to backup my copy of back to the future. i ripped part 2, but had to cut out the first few min for the audio to be in sync. if i tried from the start the audio would be off by half second all the way threw the movie. when i open vob in dvd2avi it says the film is interlaced but quickly changes to progressive so which is it ? this i think is why the sound is off. is it possible for the first few min to be interlaced and the rest progressive? im trying to rip part 3 now and am having basically the same prob but the video is a bit faster than audio this time. also i can't fix this one by cutting out the first few min. also sound in no where near in sync unless i hit the tab make audio video match 23 fps. There must be a simple way to fix the audio being half second to fast ? Please any help will be great.