Hi
I have an image (about 10.000 x 10.000 points) and I want to create a
video (about 600x400 points) which shows a section of this image. This
section should move over the image. The program should be implemented
in C. My problem is how do I get my pictures into a codec which
creates a video ?

Don't try to load a codec to do the work or any of that. That is hard to do.
If you want to do it easily, just load it in your project as a resource.
Next, Get a book on DirectX programming. That will teach you how to use
DirectX to create a surface of any size and then create a back buffer of the
same size. Then you just load the section of the picture to the backbuffer,
flip it to the front and load the next frame to the back buffer, flip it,
and so on. Suprise!!! you have a full function movie. If you do this just
right it looks really good

Daniel Moree