Sorry Mary,
You wont get that perfect desired look by changing the frame rate
during rendering. You are referring to a term known as “stop motion”,
and the only way you can achieve that look is by using a filter.
A plugin that integrates with vegas and achieve this perfectly
is ‘pixelan CreativEase’ over at “pixelan.com” …..You can try the demo and many of its various presets, i am sure will find the perfect effect you are looking for.
Steve Rhoden
Creative Director
TNX EFFECTS STUDIOS.