I'm using AVC to convert MKV into XVID AVI. Seem to be piece of cake except I can't get audio and video to sync starting from the middle and toward the end of the clip. I know in the option setting under Video tab there is a setting for audio/video sync where you can move slider 0-60 to adjust the alignment. I tried a few settings but can't get anything to work. Its also very time consuming to change the sync setting, wait to render, watch to find out its out of sync toward the end of the clip, and than start all over again. How should I go about syncing audio and video? Is there a trick or some "scientific" way or totally random? PLEASE, advice!!!