Audio and video out of sync

[mangrum6160]

Hey i know this question has probably been asked a thousand times. I tryed to find related articles but couldn't fix the problem. When i download movies most of the time they are in AVI. I convert them to WMV to watch them on my tv through my xbox. When i first download the movie and watch the AVI version on my computer the audio and video sync up perfectly. But once i convert it to WMV and try and watch it on my xbox the audio and video are out of sync. I have used two different converters and neither has done the trick. I used (any video converter) and i also have used (Prism video converter) prism allowed me to change the FPS in the output which worked on one video but didn't on the others? what is causing this problem of audio and video being out of sync and how can i fix this problem so i can watch videos without being completely annoyed.

thank you in advance.

[mangrum6160]

nevermind guys i figured it out. I had never heard of tversity until tonight it solved all problems.