Hope you are using Sony Vegas on a Windows machine because that’s what this tutorial is about. But if you’re an FCP user you can figure out how to make it work there, too.
The key is to shoot 720p at 60 frames per second. Then you bring your 60 fps footage into a 24 fps timeline and change the speed down to 40%. If I had a 7D I’d shoot a test and show you on my Mac.
Otherwise, watch and see for yourself.
Known in the film world as “over-cranking”, from the old days when the cameras were hand cranked and they operator could create funny effects by over or under cranking the film. Footage shot with normal video cameras has not offered true slow motion as the frame rate is locked in.
But the new generations of cameras offer multiple frame rates, including 60 fps and higher, allowing for a true slow motion effect. Yes, you can slow down regular video on most pro video editors but the end result is less than wonderful when compared to slowing down 60 full frames of beautiful video a second to 24 fps.
Stick with the tutorial to the end and you can see a couple of examples. While it plays havoc with sound sync even more than ever, slow motion can be a useful effect for certain types of scenes. Overuse it and it becomes a parody of the dreamy couple running through a sunlit field into each others arms – which can be useful as well!
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