i have tried a number of different times to convert VOB files (from yadeX) to DivX files for my PMP. however, every time, the audio goes out of sync about 15 min into the movie. i have read a number of posts on this forum that all claim the same thing, but i have yet to find any solutions to this problem. so my question is, what can i do to make sure the audio remains in sync with the video?

I need to go from VOB to DivX (.avi file) for my PMP (Cowon A2)
i use YadeX to convert to VOB then ffmpeg 0.0.9v to convert to avi
i have on my computer: YadeX, ffmpeg 0.0.9v, Handbrake, MTR, Roxio Popcorn

my computer: Mac Powerbook G4 1.67Mhz, 1.5GB DDR SDRAM, 50GB (available) HD

this is what i have on my computer for ripping, but i will download other programs if needed.

please let me know what can be done about this audio issue

thanks in advance for any replies, GL