Really great utility that allows you to get under the hood and make a number of low level but highly impactful aspects(including aspect ratios) of a film, including playback speed(not fast forward, but in such a way that the move is made longer or shorter), syncing the audio with the video, (un)cropping, inserting tracks, and a few more.
You open the program, then load the movie. You can either watch from the program, export or save it. It doesn't have a million features, but the one's it does have are very useful, especially with video downloaded from the internet where you find a lot of bad initial coding and unusually large media files that bog down after a while.

Ha, what a piece of software, great. I wonder that Quicktime Pro hasn't this feature and others too. With a few clicks I was able to sync a new audio track to a video stream - lip sync!
Great!

The only feature I would like to see is a batch convert.

I'm re-cropping a series of 24 QT movies and it would come in handy here.

Other than that I love this software!

This app is perfect for those video files that you have where the audio is not in sync with the video. Just a few slight adjustments and it works! An added bonus is that you can actually saved the repaired or synched videofiles in their corrected state.

I've been using version 0.2.7 and would only assume that the app keeps getting better.

Very helpful when your movie has A/V sync issues. I often transcode from AVI's to MP4's and, when such sync issues arise, QT Sync can fix the problem. I "save as" (maybe I'm paranoid about altering a source movie) and the resulting ".mov" (which started as a ".mp4") still may be dropped into iTunes, copied to my iPod, and even streamed to my tv.

I consider QT Sync to be an essential part of my toolkit.

Won't download from this page. Going to the dev page and clicking download just returns me to this MU page.