audio/video sync in mp4

[hobartgeorge]

Does anyone know how to adjust the audio/video sync of H.264 encoded mp4 files? Do i need to remux them? If so how do i do it without reencoding everything again (many files...)?

I can adjust playback using various players like QTSync on the mac but I'm pretty keen to fix the source files so i can archive them and have them work any old time (little obsession with archiving, I think I was probably a librarian in a past life...).

I use a mac primarily but have a windows box also.

Thanks in advance!

[Baldrick]

You can demux and remux with mp4box or use the windows gui YAMB.

[mhar4]

QTSync saves a reference movie, and you can open that in Quicktime Pro (if you have it) and export to mp4 with both video and audio set to "passthrough".