I recently tried to verify integrity of my 50000+ images by discarding all old 1:1 previews and rebuilding new ones. However, on my most recent images – shot in 2018 and 2019 – the process of building new previews stalled at some point and the application froze. I’ve since been able elucidate which were the trouble-some mages: a couple of .mov files from 2018 and then all 2018 and later shot DJI drone video files made the process stall. No earlier video files caused the process to stall. Contrary, Lightroom reported previews to have been built.
My workaround to still verify all still images was finally by excluding the 2018 and later video files from the preview building.
Is this a bug? What to do about it? Building new 1:1 previews of all files are after all the best way of verifying their integrity, if I've understood things correctly.
Would you need copies of any of the troublesome video file?