What would be the simplest way of transforming a movie recorded by a Canon 7D / 5D in 60 fps, to a 24 / 25 / 30 fps one, to get a slow-motion effect ?
closed as off topic by ElendilTheTall, mattdm, Itai, dpollitt, Matt Grum May 22 '12 at 15:28
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This is called conforming. You can do this with ffmpeg - a couple of examples:
Just load it into any video editing software such as Adobe Premiere Pro and adjust the clip speed. (Windows default Live Movie Maker does not allow you to do that but if I remember correctly you can do it in iMovie on the Mac) After you adjust the speed export the movie as 24fps video.