I did some Divx Encoding of a captured MPeg2 file using Vidomi

the original MPeg2 file have perfect a/v sync.

anyway is there a program to fix a/v syinc problems in an AVI file?

the encoded file sounds in sync but gradually goes out of sync as the movie goes on.

so after like 1 hour about 1 second off.
my last movie is 1:45 hours and near the ned it was like 2-3 seconds out of sync ..

anyway to fix this? I don't wanna reencode and have to hope it's good. (and it's not cause I wasted the whole good day experiementing)