I’m having the same problem with a batch export from FCP converting the several 40 minute files to WMV for a client.
I recorded with an external audio source at MP3 quality at app 44.1Khz along with the audio from the external mic to the camera at 48Khz.
The audio in FCP marches out just fine after some “tweaking”, but when exported as a wmv, the audio is out of sync and faster than the video.
any ideas for export settings to wmv to fix this?
Thank you!