This is something that I’ve not experienced first hand, but there are a LOT of people who are shooting on Canon XF305’s and end up importing using the Sony XDCam app, and they’re all experiencing this same audio out of sync/jerkiness problem.
I’m guessing that the Sony XDCam tool is being used because it’ll actually SEE the MXF files, where the Canon app fails to even recognise them.
Correct me if I am wrong, but the problem seems to be caused by failing to copy the rushes off of the CF cards properly. The MXF files alone are insufficient. There are additional files that need to be with the MXF, in a fixed folder structure before they will be recognised properly.
A lot of people don’t seem to be copying their media from their camera rushes properly. That’s why they have data wranglers on shoots nowadays; it’s NOT just copy & pasting files.
This is yet another msg in a thread of no answers, but I hope someone DOES find an answer soon!