Movie cameras shoot at 24 frames of film per second, but your TV's frame rate is the slightly smoother-looking 30 fps. That's why, generally speaking, most digital video cameras shoot at 30 fps, too. Some DSLRs let you choose, and occasionally the tradeoff for more frames per second is lower resolution. Our advice? Shoot at 30 fps when you can, even if there's a resolution compromise. If 24 fps is your only option, that's fine, too.