AVI -> iPod Touch audio sync problem

I just purchased ImTOO IPhone Video Converter. I have many .AVI files that playback video and audio with no problem. I want to convert them to .mp4 files to playback on my iPod Touch. The encoding process appears to work fine, however, the sound is out of sync with the video!

Help!

I am sorry for delay!

Maybe you can change the ‘frame rate’, I suggest: 15; 23; 29.97; 50; 60, try one of them, it can help you solve the problem.