There's loads of tutorials around on the internet on this subject. Here two video tutorials from The Force.net. One is with After Effects, the other Photoshop.
https://www.theforce.net/fanfilms/pos...rtutorials.asp
Rotoscoping may take a long time, but remember: if you want good results, there no real easy way. You can bypass the hard work.
Yeah, but no but yeah but no....