Camera mounting solution?

I've yet to find a good camera mounting solution for incar footage, for cars with stock interior, so no roll cage, or harness bar, ideally a view that will be able to see out of the windshield, and steering inputs, I've tried a clamp mount onto the passenger seat head rest bar, but baecause the seat is not solid, it cause the video to shake quite abit on track, I;m going to try mounting the camera on the rear quater window next, but I'm worry that might be a bit too far back, and lean to one side. Want to see how others mounted theirs, or any other better ideas