how do I add 30 fps to a 24p project?
 

So we're doing a school project all shot in 24p, and we acquired stock footage that is vital to our video, however it's all shot in 30 fps (not even sure what camera it's shot on). but needless to say it doesn't look good mixing with all of our 24p footage. My only suggestion to the group was to go into AE and use the posterize time effect, but I'm not sure this is the best way to execute this. any other solutions?