Thanks for coming to my rescue, John! 🙂
The videos originally came from my Panasonic HDC-HS300 as MTS files. I believe they are being converted to ProRes 422.
If I Share them as a composite file, eg. Apple Device 720p (H.264) and make m4v files, everything is in perfect sync. It’s only the exporting to MPEG-2 format as separate files that I’m getting the outs-sync problems. I’m sure that something in either my ac3 or MPEG-2 Compressor setting is not right.
Cheers,
Brett