30min at 120fps

[caseyjames]

Hi,

I have a 30 min video at 120fps covering a large out door area as completely as possible. 

Should I take every 5th frame and let it go?

[Wishgranter]

better with 1f/s  or even 1f/5sec..... depend on speed of the camera over the area, if have every 5th frame the distande between images will be small and it will cause problems when aligning... because of small angle separation.