Hi, sorry for my bad english. This is because I'm french.
I already created some Gif like this : http://imgur.com/a/yuvmO
I search a way to put a face on a gif fluidly. I thought of a way, but I do not know if it exists.
I did a picture for help to understand : http://image.noelshack.com/fichiers/2013/44/1383180953-question.gif
I know this is strange method, but I want to know if this exist.
Thank you <3
Its called auto align. Photoshop will take both images and align them for you, then you can use a mask to reveal the image underneath. But it requires enough of the image to be identical for it to align to.