An unknown error occurred while reading the video file.

Report · Aug 13, 2018

I have had this issue since upgrading to the latest LR Classic (7.3.1) running on Windows 10 Pro N. I get the error:

"Some import options were not performed>An unknown error occurred while reading the video file"

This occurs when either attempting to read from a card or synchronizing an existing folder with video files

The video files are from a Sony Alpha 7rii, both .mts and .mp4. The would import fine before the update. Actually the very same files that imported before the update get this error now.

In the import window dialog, the thumbnails read: "Preview unavailable for this file"

All files open just fine in other programs.

This is what I have tried so far:

Allowing Adobe QT32 Server.exe and dynamiclinkmanager.exe access through Windows Defender Firewall

Reinstalling LR Classic 7.3.1

Downgrading to LR Classic 7.3

Downgrading to LR Classic 7.2

Clearing video cache

Testing integrity and optimizing catalog

Restoring a previous backup when the process worked

Removing all third party plugins

Disabling all built-in plugins

Er, help?

Report · Aug 13, 2018

Update: I also uninstalled all recent Windows updates. No difference.

Report · Aug 13, 2018

Also tried renaming and deleting the following:

dynamiclinkmediaserver

dynamiclinkmanager

DyanmicLinkMediaServer

Report · Aug 13, 2018

Did the nuclear option: uninstalled all of CC and did the Adobe CC Cleaner tool. Reinstalled.

Same thing.

Report · Aug 14, 2018

Also installed QT. Same thing.

Sometime in the process, the error changed to:

Some import operations were not performed>Unsupported or damaged file.

Report · Aug 16, 2018

I sure do love wasting hours of my life and missing deadlines. Whoo-hoo!

Report · Aug 19, 2018

I was just testing .MTS files while looking for an answer for another forum question when I came across this:

Please see the following link:

Adobe Creative Cloud apps use native OS support for Dolby

As you indicated that you have "Windows 10pro N" it looks like you would need to install the Windows media feature pak as mentioned there to use the .mts files as they contain AC-3 audio.

(I can import the .mts files from 4 different cameras on LR7.4 on my Win10 laptop but not LR7.4 on Win7 desktop as a result of no built-in decoding for Win7. It works with CC2015.12 that is still installed though)

Report · Aug 19, 2018

Thanks so much. It's great to finally get an answer.

But nope, that didn't work either. I am now wiping my entire system and rebuilding....

Report · Aug 30, 2018

Wiped and rebuilt the OS, then S.O.S.

Anyone from Adobe out there?????????

Report · Aug 30, 2018

And did the latest Lightroom cc Classic update.

Report · Oct 04, 2018

Here we are, over 6 week later, and I am in customer support purgatory with Adobe. I go over the same situation over and over and over again. I have set up at least 5 times to have their "priority" team call me, and they simply do not call.

Wow.

Report · Oct 04, 2018

Can you upload a sample video to Dropbox or Google drive etc and then post the link?

Then myself and others can check to see if it works or fails in the same way.

Report · Jan 03, 2019

After being in the field for months, unable to work with videos in LR, still nothing works. Added to the list of what was tried were updating the BIOS, the newest driers, and the newest Win 10 upgrade.

bhousto90-thanks for the suggestion, but it is all video files, dozens of different formats.

Anyone out there? Does Adobe care?

Report · Feb 05, 2019

same problem, please fix adobe.

Report · Oct 16, 2019

I have the same error with LRC 8.4.1

Are there any good alternatives to Lightroom? This thing is awfully slow on a PC (quasi latest i7, Win10, 16G RAM,...)

Report · Oct 16, 2019

I also already purged my cache, as suggested in some other posts