it was recorded at 5 second intervals…does that sound right?
Your subject and post is rather vague. Are you saying that you recorded a 6 hour time lapse at 5 second interval and it takes two HOURS and 48 seconds to play it back? If you really meant 2 MINUTES and 48 seconds, that sound about right (without doing the math).
I think it should be 30 minutes total.
6 hours x 60 x 60 = 21,600 seconds
Every 5 seconds means divide by 12 (12 times per minute)
That’s 1,800 seconds, which is 30 minutes.