time lapse

i am looking for software that will take a video i have made and pull one frame out of it at any time i want (5sec, 10sec,20sec,30sec and so on) it will then take those frames and make a time lapse movie out of them in a format that i have chosen. ( like avi ) so lets say i have made a one hour video i want one frame every 5 seconds that would give me 720 frames movie playing back at 30 fps would give me a 24 second movie. i would like to start with simple software that works and add to it. ## Deliverables ? am looking for software that will take a video i have made and pull one frame out of it at any time i want (5sec, 10sec,20sec,30sec and so on) it will then take those frames and make a time lapse movie out of them in a format that i have chosen. ( like avi ) so lets say i have made a one hour video i want one frame every 5 seconds that would give me 720 frames movie playing back at 30 fps would give me a 24 second movie. i would like to start with simple software that works and add to it. the new movie would have to be able to be saved in any of todays popular formats