LR 6.14 crashes when switching to Loupe View with video files

[#1]

For years now I have been able to view my .mp4 video files in Lightroom (and adjust start/end points, export, etc.). But now every time I double click on a video file or try to switch to Loupe View, the program crashes. Loupe View works fine with images, but no longer with video files. Even if I create a new catalog, import one video file into it, and try to switch to Loupe View, the program crashes. Adobe tech walked me through a new, clean install, but it still does it. Graphics processor acceleration is already disabled. Anyone have any suggestions? PLEASE???

[#2]

For years now I have been able to view my .mp4 video files in Lightroom (and adjust start/end points, export, etc.). But now every time I double click on a video file or try to switch to Loupe View, the program crashes. Loupe View works fine with images, but no longer with video files. Even if I create a new catalog, import one video file into it, and try to switch to Loupe View, the program crashes. Adobe tech walked me through a new, clean install, but it still does it. Graphics processor acceleration is already disabled. Anyone have any suggestions? PLEASE???

[#3]

Some generic troubleshooting steps that might help:

1. Restart your computer (just in case you haven't already done that multiple times).

2. Try resetting LR's preferences: https://www.lightroomqueen.com/articles-page/how-do-i-reset-lightrooms-preferences/. LR sometimes soils its preferences file, and resetting it can fix all sorts of wonky behavior.

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[#4]

Thanks John. Yes, I've rebooted numerous times, and I just reset LR's preferences (again) according to the link you sent, but still crashes when double clicking or selecting Loupe View on a video file.

[#5]

What OS are you using?

[#6]

Windows 10

[#7]

Upload one of the problem .mp4s to Dropbox or similar and post the sharing link here. We can see if other LR installations have problems with the video.  It's less likely to be related to the videos themselves, but let's quickly rule that out.

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