gistek

There might be something in the Image mixer 3 editing thread.

I use Windows MovieMaker and Pinnacle Studio 11 when I work on videos. Sometimes the audio and video seem to get out of sync, but if I switch to a different function, the two seem to sync up again, My theory is that the tracks are in sync, but something between the processor and the speaker and screen drivers slowed one of them.

It's possible that the video is too large for the computer to handle - or too large when too many other things are running. You might try running ImageMixer by itself. This includes ending things in the icon tray that you're not using. I know the Pinnacle Studio applications "don't play well with others" and ImageMixer might be the same way.