ExifTool Forum

General => Metadata => Topic started by: jbrigham on May 08, 2018, 04:07:35 PM

Title: iPhone Time Lapse video - deriving time
Post by: jbrigham on May 08, 2018, 04:07:35 PM
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.
Title: Re: iPhone Time Lapse video - deriving time
Post by: Phil Harvey on May 08, 2018, 09:46:38 PM
Duration# should be in seconds, so add this to the start time.

- Phil
Title: Re: iPhone Time Lapse video - deriving time
Post by: jbrigham on May 09, 2018, 07:21:21 PM
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?
Title: Re: iPhone Time Lapse video - deriving time
Post by: Phil Harvey on May 09, 2018, 09:45:40 PM
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