RS said:
Is there a method or formula for figuring out the interval between
shots (and how long each shot should be) for shooting time lapse?
Thank you.
The time lapse would depend on how much faster than real time you want the
result to be. The normal North American Television Video (NTSC) is 29.97 (30
frames per second.)
If you want the final video to be twice as fast as real time you would take
15 frames per second and if you took one frame per second you final result
would be 30 times faster.
Returning to the real world: if you want to film 24 hours of any given
activity and you want a projection time of one minute you would take one
frame every 48 seconds.
There are 86400 seconds in 24 hours and in normal recording this would be
2,592,000 frames. In the same way there are 1,800 frame in a minute.
By dividing you know that you want to go 1440 times faster than normal or
one time lapse frame for every 1440 frames in real time. Then 1440 frame
divided by 30 frames per second gives you 48 seconds
There has to be a simpler way!!
Just found it in another blog:
LPF = Length in time per frame.
FPS = frames per second
TL = Total Length in time (seconds) to record
LPF * FPS * 60 seconds = TL
or
LPF = TL / (FPS * 60 seconds)
Given the example values above:
LPF = 86400 seconds / (30fps * 60 secs)
LPF = 48 seconds
At least I got the same result!!
