"Preview unavailable for this file" for MAH...mp4 movie files from Sony A77 Camera

[gwinaz]

Lightroom Classic 12.2. Windows 11 22H2 OS build 22621.1413

When I try to import movies from my Sony A77 camera, Lightroom displays "Preview unavailable for this file". The file has an mp4 container and plays OK on all of my PC movie applications. Is there a way to create the thumbnails for these files?

Reply from a post on another forum based on my example video linked below:

That video imports and plays correctly in my LR 12.2.1 / Mac OS 13.2.1. But on my Windows 10 and Windows 11 test installations, I get this:

When I play back the video in LR Loupe in Windows 10, the video window is grey. But it plays correctly on Windows 11.
I tried re-encoding the video from 1080p to 720p and got the same results.

End of forum post.

This is a link to a 4 second test video from my Sony A77 camera:

Example video: https://www.dropbox.com/scl/fo/msc805nhw7b5cbxanzvhh/h?dl=0&rlkey=7yn84mw7ccuk38eso3cr6f690 

I have not been able to find a work-around.

[johnrellis]

@Rikk Flohr: Photography, please move into Bugs. I verified these symptoms with the sample video on LR 12.2.1 on Windows 10 and Windows 11.

[Rikk Flohr: Photography]

I am reviewing with the team prior to moving this to bugs. Stand by please!