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Video files have incorrect time stamps

Participant ,
Oct 27, 2022 Oct 27, 2022

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The short: video assets are approx 4 hrs offset from actual time in LR Classic. Issue persists with multiple cameras and on multiple computers. Issue does not affect photos, only video. 

 

The long: I noticed in the last few months that video files have been ending up at the tail end of each days collection when they should be mixed in with the photos. Then I noticed the timestamps were wrong -- about 4 or so hours off. Not exactly 4 hrs but wondering if the length of the clip may account for that since they're about 3 or 4 minutes off from being exactly 4 hrs with 3 or 4 minute length clips. About 4 hrs 1 minute off for 30 second clips, etc. 

 

I noticed this issue persists with multiple cameras, including my iphone and in LR Classic on my Mac Studio and MBP.

See attached images for LR timestamp vs. the correct timestamp shown in Finder. 

 

Any help would be greatly appreciated since this is leading to other issues!

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Community Expert ,
Oct 27, 2022 Oct 27, 2022

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LEGEND ,
Oct 28, 2022 Oct 28, 2022

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To build on Johan's reply, the Quicktime standard (incorporated by the ISO standard) was poorly defined by Apple with respect to capture dates, specifying that the date/times should be recorded in UTC and providing no way to also store a time zone.  But many cameras, not having a notion of time zone, record "local time" in the capture-date field.  So LR assumes those date/times are in local time and interprets them as such (where "local" means the clock on the computer running LR).

 

Cameras with Internet or GPS connections typically do know their time zone, and they typically do record capture date according to the standard in UTC.  Your DJI has GPS and likely is obeying the standard, recording times in UTC.  But LR assumes it's the typical non-connected camera and interprets that time as "local".

 

So are you in EDT (UTC - 4)?  

 

This is an industry mess not of Adobe's making.  In principal, LR could do a better job, with a database of camera models telling it how to interpret the capture times (analogous to its camera and lens databases for raw), but Adobe has never cared much about video, much less cared about video metadata.  So you'll have to use the Metadata > Edit Capture Time command to shift all the videos by your time-zone offset.

 

The reason you see time-zone-correct times in Finder is that cameras record file dates using the "local" time from their clocks along with a time zone (if the camera has that setting).  You often see differences between the capture dates stored in the photo or video and the file times on the memory card because the camera firmware sets them at slightly different times.  With photos in some cameras, they can differ by a fraction of a second, but with video, but the length of the video clip, depending on what times the camera firmware chooses (the beginning of the clip, the end of the clip, or something in between).

 

(There's a longer story why LR gets the capture times of iOS video correct, involving "unique" legal interpretations by Adobe corporate counsel. But that's for another day...)

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