[Request] Making Gif Stitches Help

I am not sure if I am posting this in the right area but I have a request on leaning how to do gifs. Of course making gifs can be pretty simple. But I am having trouble figuring out how to make a gif of particular hentai scenes. During most intimate scenes at some point the camera is panning either up, down, left, right, or diagonal to show a full scene. I don't know how they do it but you can go on some anime image boards and see these full scenes as gifs without the panning. This is what I want to know how to do. If anybody know how to do this please explain. I've posted links of some examples below.

Bible Black:
http://g.e-hentai.org/s/b2bf8ef791/872546-28
http://g.e-hentai.org/s/8e7c4ca5bf/872546-49

Midnight Sleazy Train:
http://g.e-hentai.org/s/86bf5734fc/910782-29
http://g.e-hentai.org/s/ab2c1ccf3d/910782-6

Thanks