So, since all my movies were ripped to avi before I converted to Mac, I needed a solution to add them to iTunes without converting them all. What I did was install Perian and other codecs on the Apple TV. Then I used the script Apple TV Fooler to "convert" the files to a .mov acceptable by iTunes. What Apple TV Fooler does is add a 1 second blank clip (H.264, AAC) to the beginning of each movie so that iTunes thinks that it is the correct file type. This worked perfectly and solved my problem. However, now that I've gone ahead and done this to all my movies, I'd like to undo it so that these files can be used by Plex since I am interested in buying a Mini and making my own Media Center. Does anyone have any knowledge of how to create a similar script, except with the reverse effects (delete the first 1 second of each movie)? Thanks.