Nikon d5200 Problem?

I got a problem with nikon d5200 video. When i shoot on Full HD 30 p and import into after effects as i use the playback in some part of it says that the frame rate is lower like 27 etc. So the playback doing slow motion and i can't edit. Same with other bit rates and in HD also.Anyone knows anything about it? Thanks

According to page 234 of your Reference Manual, the actual recording rate of 30p is 29.97 fps.

"So the playback doing slow motion"… Sounds more like your computer hardware isn't up to the task of running AfterEffects. Have you checked your computer meets the minimum system requirements to run AfterEffects? Check on the Adobe website.

Playing back 30p video at 27fps should not result in a noticeable slow motion effect. So clearly the problem has nothing to do with the camera.