Sure. I believe it is a “quirk” of the QT Pro app (on Windows at least)(?).
To pass a preview video with my sound to clients I export the audio from Nuendo, noting the timecode position I exported from. I then open Quicktime Pro, open the original video, go to Show Movie Properties, delete the Sound track from the movie properties, go back to the main movie viewer screen, locate the timecode position I want to drop in at, move the pointer an additional two frames to the right with the right cursor key (if I don’t do this step the audio I lay in plays approximately 2 frames early), open in QT Pro the audio I exported earlier, select all and copy, go back to the movie, then Add to Movie, then either select the portion of the movie I want to share, paste into a new MOV, or save as-is, or export to a new format like MP4 or other.
I’m quite adept at doing this now, but I’d much prefer to hit “Export to Video” in Nuendo, given that I do this maybe 10 times a week, more often when working on short material back-and-forth.
Is that enough information on the process GTBannah?