iPhone Time Lapse video - deriving time

Started by jbrigham, May 08, 2018, 04:07:35 PM

Previous topic - Next topic

jbrigham

Hello -

Is anyone aware of a way to figure out, based on metadata from an iPhone time lapse video, what time it was when the time lapse ended?  I know we have the Create Date, of course, and I see fields called Time Scale and Duration, but I'm not sure how to use those values to determine what time it was at the end of the recording.  Any ideas?

Thanks.

Phil Harvey

Duration# should be in seconds, so add this to the start time.

- Phil
...where DIR is the name of a directory/folder containing the images.  On Mac/Linux/PowerShell, use single quotes (') instead of double quotes (") around arguments containing a dollar sign ($).

jbrigham

Thanks Phil.  It's deceptive, though, because it's a time lapse video so a 32 second duration actually represents a much longer span of time.  What is time scale reporting?

Phil Harvey

Ah, right.  Good point.  It is played back faster than it is recorded.  Some cameras store the original frame rate in the proprietary metadata, but many do not.  All I can say is that ExifTool should extract all available metadata from an iPhone video, so you should see the original frame rate if it exists in the file.

- Phil
...where DIR is the name of a directory/folder containing the images.  On Mac/Linux/PowerShell, use single quotes (') instead of double quotes (") around arguments containing a dollar sign ($).