P: Videos don't play and don't import

Thank you for your interest.

Typical errors include connecting to Dynamic Link Server, error working with video, unknown error, problem with the video file.

File formats include AVI, MOV, MP4 and MTS. All play ok with VLC Media Player and other apps.

Cameras include Canon 60D, Canon Legria HFM31, Sony RX100IV and an old Canon IXIUS

Windows 10 Home, Version 1803, OS Build 17134.648

Details from Lightroom below.

Lightroom Classic version: 8.2 [ 1204643 ]
License: Creative Cloud
Language setting: en
Operating system: Windows 10 - Home Premium Edition
Version: 10.0.17134
Application architecture: x64
System architecture: x64
Logical processor count: 8
Processor speed: 3.3 GHz
Built-in memory: 8100.1 MB
Real memory available to Lightroom: 8100.1 MB
Real memory used by Lightroom: 393.3 MB (4.8%)
Virtual memory used by Lightroom: 744.6 MB
GDI objects count: 667
USER objects count: 2171
Process handles count: 1909
Memory cache size: 0.0MB
Internal Camera Raw version: 11.2 [ 134 ]
Maximum thread count used by Camera Raw: 5
Camera Raw SIMD optimization: SSE2,AVX
Camera Raw virtual memory: 39MB / 4050MB (0%)
Camera Raw real memory: 39MB / 8100MB (0%)
System DPI setting: 168 DPI (high DPI mode)
Desktop composition enabled: Yes
Displays: 1) 2560x1440
Input types: Multitouch: No, Integrated touch: No, Integrated pen: No, External touch: No, External pen: No, Keyboard: No

Graphics Processor Info:
DirectX: NVIDIA GeForce GTX 960 (25.21.14.1771)

@8669371 Searles,

What is your Windows version?
What is your installed Lightroom version number? (Help>System Info...)
What is the video source? Which Camera? Which format?

I posted about this problem over a year ago. Have tried all suggestions without success. Still can’t import ot play video files.

Next step is to try a clean reinstall: 

• Close Lightroom
• Restart the computer
• Use the Adobe Creative Cloud App to uninstall Lightroom Classic CC
• Restart the computer
• Install Lightroom Classic CC via the Creative Cloud App without launching any other programs.
• Restart the computer
• Launch Lightroom
• Wait 5 minutes

No, it does not... I mean I can play videos but when trying to import new ones it tells me that connecting to Dynamic link server faliled. I can play the video in Finder very well.

It works now! Many thanks.

A Preference File will survive a Lightroom uninstall/reinstall. Sometimes weird behavior is corrected/cured by resetting the preferences. 

Reset Procedure:

1. Close Lightroom.
2. Hold down [Alt/Opt]+[Shift] while restarting Lightroom. 
3. Overwrite the Preferences when prompted by the dialog.
4. Close Lightroom.
5. Restart Lightroom.

Does the behavior continue after resetting the preferences?

I am on LrClassic 8.2 and all of sudden during an import the process took for ages and did nmot stopped. Had to force quit my iMac LR. Since then no video old or new can be played. Tried the suggested to delete those files. It did not worked. Adobe, please!!! Come up with a solution for this.

Hi All

I had the same issues with Lightroom Classic. I tried everything above but still no video!
For any reason i tryed older Versions of LR. After i opened and closed LR 2015.14 LR Classic was able to import and playback videos again!

Actually i don't think this is the solution but somehow it work's in my case!

I am suddenly having this same issue on two of my Mac computers - an older iMac and an older MacBook Pro. Both happen to be running Mac OS Sierra (10.12.6) and the latest "updated" version of Adobe Lightroom Classic CC pushed through the Adobe Creative Cloud GUI. I can no longer import videos from my iPhone nor can I play existing videos in my Lightroom Classic catalog. I do a monthly import of photos and videos from my iPhone so something has changed over the last month. (I happened to have updated one of those two computers from Mac OS 10.11 to 10.12 in that time, but the other one was already running  OS 10.12.x and the video import/playback from my iPhone had been working fine.) I tried the fix on the first page of this thread but it did not help. This is a big disruption to my workflow and really discourages using Lightroom! Please advise. Thank you.