Once, a student of my university, Christoph Brunner, built a a very large magazine for a 35mm-camera to be able to exposure one minute of film stock again and again. That was the point when I asked myself how you can do that in a digital way. And that's the solution:
You normally record an image about 17 minutes with your camcorder, log it into your editing software and devide the take into a hundred pieces with a length of 10 seconds for example. Then you put the single pieces among each other with an opacity of one percent.
The result: All the elements in the picture, which don't move look normal, all the moving elements look like dust or something.