P: Metadata including dimensions and capture date for MP4 not read when THM sidecar present

I've been using Lightroom to import Canon 7D video files for about 8 years with no major issues.  I just noticed that all videos I imported since mid-April have no meta data from the THM side car files - no date taken, no camera info, no exposure info, etc..  The previous import I did was in December 2017, and that sidecar information imported as usual.  I didn't import any videos between December and April, so I don't know with which release the issue started, but I suspect 7.3.

Has anyone else been experiencing this issue, or have I done something to my setup?  I am running Lightroom 7.3.1 on Mac OS X High Sierra 10.13.4, on a 2012 MacBook Pro.

This screen shot shows a May 2018 import with no sidecar metadata:


This screen shot shows a December 2017 import with all sidecar metadata:


I did try an import with "Embedded or Sidecar Previews" just to make sure that wasn't the issue, but that setting made no difference in the metadata imported.

Any suggestions would be greatly appreciated!  Thanks!
Jon

Steven, my initial analysis of this bug was incorrect. Please see the first post in the merged thread above -- LR is getting confused by the presence of the THM sidecar files. 

If you copy the videos to your hard drive first, delete the THMs, and then import them into LR, LR should set the capture time consistently.  Unfortunately, that capture time will be in UTC, not the local time. But you can use the Metadata > Edit Capture Time to shift all the videos by the appropriate number of hours.

Using LR CC Classic 7.3.1.  When I import a mixture of still and video files into lightroom and attempt to sort by 'Capture Time' the .ARW (sony raw) and .mov (video) are separated, but within their file extension, they are sorted correctly by capture time.  If I edit capture time (Metadata>Edit Capture Time) and do not make any changes but select 'Change', then the file is placed in proper capture time sequence.  This behavior has been observed by others via a conversation on photo.net.

This is a difficult issue when one is shooting with two different cameras with different extensions and one wants to sort all of the captured pictures in sequence or when there is a mixture of stills and video from the same camera.

Please fix this bug

LR 7.3.1 doesn't read the dimensions of MP4s imported from a Sony RX100 V:



From the SDK, photo:getRawMetadata () returns {} for "dimensions" and "croppedDimensions".

Two examples:
https://www.dropbox.com/s/tapzs8u807242ao/sony-mp4s-bug.2018.05.02.zip?dl=0

The problem appears related to the presence of the .thm sidecars created by the camera. If you copy the .mp4 files to your harddrive without the .thm sidecars and import from there, LR correctly reads the dimensions.