Common frame rates include:
Remember to set the frame rate of your project at the beginning. Any clips that do not conform to the timeline frame rate will be played back with skipped or duplicated frames to try to match the timeline frame rate.
It’s tough to convert from 30 fps to 24 fps so do try to avoid this. Most of the other common conversions are possible with less potential for harming the image.
This is a good reference for putting high frame rate footage into a lower frame rate timeline.
This is the process of converting 24 fps footage to 29.97 fps. The opposite is called a ‘reverse pulldown’.
The increased “temporal” resolution of 60i makes for a better conversion to 24p.