[FFmpeg-user] “Real Time”, “Slow Motion” and “Time Lapse”

Carl Zwanzig cpz at tuunq.com
Tue May 11 00:47:14 EEST 2021

On 5/10/2021 12:50 PM, Bryce Newman wrote:
> I have - for example - three videos that which visually can be classified as “Real Time”, “Slow Motion” and “Time Lapse”.

Expanding on what Nicolas wrote-

"real-time" generally means that an image was captured at a set rate with 
the _intent_ of showing the images at that rate

"Slow motion" means that images were captured faster than the display rate

"time-lapse" means that images were captured less often than the display rate

None of those indicate what the display rate should be, for most things it's 
assumed, but shoot at 48fps and then show at 48, that's still real time.

If all you get is the assembly of images with a frame display rate, there 
isn't any info to guess how fast the images were collected.

If the images were captured as stills and had their original metadata, you 
might be able to figure out the time between captures and intuit something 
from that; no guarantees, though.



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