Bug 374725

Summary:	Thumbnail is incorrect for one MOV file, shows an unrelated jpg
Product:	[Applications] digikam	Reporter:	Geoff King <gsking1>
Component:	Thumbs-Video	Assignee:	Digikam Developers <digikam-bugs-null>
Status:	RESOLVED FIXED
Severity:	normal	CC:	caulier.gilles, freisim93
Priority:	NOR
Version:	5.4.0
Target Milestone:	---
Platform:	macOS (DMG)
OS:	macOS
Latest Commit:		Version Fixed In:	7.5.0

Description Geoff King 2017-01-07 23:25:22 UTC

I am trying 5.4.0 beta (12/31/02016) on Mac OSX El Capitan.  I found an example where the thumbnail is incorrect for a movie file.  The thumbnail shows a photo that that is unrelated (a few away on the grid and taken on a different day).  If I click on the thumbnail it shows the movie file correctly.  All the other information such as date and file properties appears to correctly represent the movie file.  The only thing I see that is incorrect is the thumbnail. 
Both are from an iphone6S.  The movie is a MOV in slo-mode and the photo is a JPG. I have tried other images with the same format and so far only discovered this one.  

I tried: Item > Reread metadata, which did not help
I moved the file to a new directory which did not help, but noticed that by doing so the Video Properties were now available, but were not before.

So..
-Is there a way to re-set the thumbnail for a video file? Even a blank thumbnail would be preferred.
-Reread metadata should do that for video files (not sure it is because the Video Properties in the Properties Pane did not show up at first.)

Thanks.

Comment 1 Simon 2017-01-08 00:08:40 UTC

You can rebuild thumbnails for all elements in an album via Tools ->
Maintenance... -> Rebuild Thumbnails. In the maintenance dialogue choose
only the album where this video is. AFAIK rereading metadata has nothing
to do with thumbnails.

Comment 2 Geoff King 2017-01-08 00:35:18 UTC

Thanks. This solved my problem.  I did the Maintenance options and checked Scan for New Items and Rebuild Thumbnails.  
However,  during the maintenance digikam locked up (I waited several minutes) and I eventually killed it using Mac's Force Quit.

Upon re-starting digikam the thumbnails started re-populating and were correct.  It all seems okay now.

So my problem is fixed, but I did encounter another potential issue with the maintenance locking up the program and requiring a restart of digikam.

Comment 3 Simon 2017-01-08 01:17:53 UTC

If you can reproduce the hang, please open a new issue, start digikam from console (https://www.digikam.org/contrib) and add the console output to the issue.