I have made quite a few camera apps either for taking picture or making a movie so I am familiar with that code.
What I would like to do is when I initiate a camera, I create an overlay of a UIImage view with an image of a mustache in it. Now I tell the user that he can record a video and make sure mustache picture that he sees on the screen shows up over his face and then he should record a video. In terms of coding I know how to do this too.
The problem I have is that I have no idea how can I combine the video and that picture overlay? I mean when the video gets recorded it records only what the camera see (user face without mustache). What I want to do is make a funny video with that image of mustache placed on the video as well?
Here is one sample app that does something similar. How do they do that? Any sample tutorial?