[Benny Krown]

Marc and Thomas,

I was having the same audio/video sync problem as Marc, though I didn’t use handbrake to rip from a DVD. My file was a regular .mov file exported originally from FCP whose source was captured from a Beta SP tape via Blackmagic codec and burnt to a data DVD, from which I copied it onto my HD.

My file plays fine in quicktime, but once imported into FCP into a brand new timeline, I get the variable lag. I tried just moving the tracks to sync, but that did not fix other places in the video. I also tried messing with the audio rates and formats to no avail.

Once I threw my original file into Compressor and gave it the 422, the file was magically synced as Thomas suggested. Though, I did something interesting that might further help diagnose the original problem. I laid my new 422 file into a new timeline, which FCP asked to auto convert settings with my approval. Then I laid my original source file into a second track, directly on top of my 422. Then I muted the 422 video and the original source audio so that the 422 audio played with the original video. This created the same sync error. Next, I reversed the mute so that the 422 video played with the original audio and the sync error was gone!

This leads me to believe that for some reason the original source video was stretched/compressed in the process of importing into FCP and NOT the audio. I believe the video was compressed in time rather than stretched.

I have no idea whatsoever why this would occur as such, but I thought I would contribute my findings to the betterment of society, haha.