sorry, can't try this right now, will do a bit later (tomorrow most probably). just leave the script in the archive.
I do have a hunch though: if you have a filename, say "movie number 1.avi", with spaces, when you enter the path, it would look like:
"/path/to/clip/movie\ number\ 1.avi" the space character is entered as "\ ". could this be the problem?