P: Videos do not play or import macOS High Sierra

No files there. Already reset preferences. PleaSe assist.

Hi,

Can you Please Delete the below files and try? 

<user>/Library/Preferences/Adobe/amecommand/10.0.0/Trace Database.txt

<user>/Library/Preferences/Adobe/dynamiclinkmediaserver/10.0.0/Trace Database.txt

Let us know if this resolves this issue.

-Kanheiya

Same here.   No real response from Adobe on this issue. .  Seems they have gone silent on responding.

To add a few more details - High Sierra 10.13.3 on iMac 2017 (but had the same issue with Sierra before upgrade on a different machine). For videos, in the library module, I see a grey spaceholder instead of video, and video controls do not respond. Lightroom CC (not classic) on a different machine (same cloud synced videos) plays the video just fine. This is for all videos created with different cameras. 

Same here, lightroom cc 7.2, so maddening. Months have passed and still not able to play videos. Import works fine. 

I am still waiting to get some feedback on this issue?   Seems to be a continuing issue with many and little to no feedback or resolution.   Yes some short term work arounds have been posted.  They seem short term as the problem returns with the next Lightroom update or bug:

This continues to be an issue in Lightroom Classic CC.   Any real response from Adobe on this issue.

Paul

Hope this could help! Still can't view previously imported videos - BUT - I can now import and view  imported videos!

I believe the trouble is linked to Quicktime components and access to them.

My first hint was that I could only view MTS file through VLC  but not open them with Quicktime player anymore. I had Perian components installed since years in my computer and this before installing High Sierra OS.
I am not sure if Perian was the cause but in case I disabled Perian via System Preferences/Perian/Uninstall

I went to https://xiph.org/quicktime/download.html and installed components xiph-qt-0.1.9

I could then open MTS (AVCHD) videos again with QuicktimePlayer X.

I restarted my computer, opened LIghtroom Classic CC. I could import new videos, thumbnails are visible again and I could read the video files inside Lightroom Classic CC.

My pre-imported videos still are unreadable. I re-imported one of the unreadable videos inside Lightroom Classic and THEN the video worked.

I still didn't find the solution for past imported videos not having to re-import a huge number of files inside LR Classic...

would it be possible to have the issue result public so we can use your help too? thanks

unfortunately not working on my computer