Exactly what is says on the tin…you want overcrank quality slow motion with a camera that doesn’t have it but shoots 50p or 60p? Then this is how you do it with a Mac.
One word of warning. This is a one way process so if you want to keep the 50p/60p version make a backup!
See the results here: http://philipbloom.co.uk/2009/05/02/kauai-sunset-lumix-gh1-slow-motion/