The best thing you can do in this case I guess is to capture the screen at a static interval. You can do three things (which I can think of atleast :)): 1) Just capture the screen at a static interval and write it to the disk as bitmap 2) Capture the screen at a static interval and write it to the disk as a compressed image 3) Capture the screen and compare it to the last to see if it changed and write it to the disk if it didn't (this means that you'll also have to keep a log on how long the same image should be shown) Depending on the desired framerate and quality of the final movie (and ofcourse speed of the machine) I can't do nothing but suggest you to find the best and fastest way for yourself. They all have disadvantages, the first two being a high I/O and the second a lot of CPU required. The third, well I don't know about performance in the third. It seems like it could be pretty fast compared to the other two, but it's just a hunch :) I think though that if you want the best performance this should be done in assembly, especially with method 2 and 3. And I was just thinking. Suppose you have a resolution of 1024x768, 16 bits and you wish to have a framerate of 24. This means that with method 1 you'll have to write about 40MB/s to the harddisk. It's going to have a very hard time doing that and the harddisk will need quite some space too :) If I were you I'd try my last suggestion, it sure seems like the most fun suggestion as well :)
