Yes, but you can take a picture during a video clip which starts a new video file after the still is taken. If you're the only shooter then you could splice the clips together but you'd have a second gap or so.
However if you're doing this professionally and had two shooters you could simply jump to the other camera and avoid any interuptions.
Assuming that you wanted to be at that camera angle at the time in question.
I'm not a video expert but what's wrong with the .mov wrapper? Is there also something wrong with h.264?
Video compressed like that is simply unideal.


