So can anyone help me in finding a way or the answer itself to above question. I am precisely looking for -whether the process involves merging two different frames (graffiti_frame & camera_frame I just have named them for simplicity)taken at same instant or resultant output frame has been made by changing camera recorded frame in accordance with swiped area on the screen during recording. Any insight related to it will be helpful. Thanks in advance.
Edit: The following is the link from apple official site about the feature with Title:Add a sketch to a photo or video link