Lightroom Classic 8.3.1: Suddenly unable to view videos in Loupe view on MacOS 10.13.6

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  • Problem
  • Updated 1 year ago
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  • (Edited)
Suddenly unable to view (run) videos (.mov or .mp4) in LR 8.3.1 (MacOS 10.13.6) ... the videos can be scrubbed across in Grid view so no issue with file integrity or access.  Files can still be exported. Tested across a sample of videos from 4500 ranging in dates from 2008 to the present.  The current library holds 148K images and videos.  The video cache is limited to 5Gb and LR hangs when I try to purge the cache.  The RAM on the iMac 5K retina is 32Gb.
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Ian McNairn

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  • Frustrated

Posted 1 year ago

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G0apher, Employee

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Hi Ian, sorry to hear that.

Were you able to view the same videos in previous versions or in 8.3.1 itself before? Are you able to play slideshow videos using images from your library? Were there any recent updates to the graphics drivers? You could also try clearing the Video Cache manually from ~/Library/Caches/Adobe/Lightroom/Video.




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Ian McNairn

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Hi GOapher ... thanks for the speedy response. 1) was able to play/view these videos pre-8.3.1 ... not sure if this was introduced with 8.3.1 or not  2) I can play slideshow of images perfectly (however not if I include video clips in selected image set, even though it calculates the slideshow duration to be image display time + transition multiplied by number of slides PLUS the video clip duration ... so for 3 slides, intro and exit banding plus one 34sec MP4 video it calculates that to be 46 sec long, and then fails on a black screen ... recover by ESCaping).  3) no recent updates to graphics driver I am aware of  4) I cannot clear any cache as ~/Library/Caches/ seems to contain no Adobe folder, nor does ~/System/Library/Caches contain any Adobe folder
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Ian McNairn

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The behaviour is:
in GRID ... video clip visible and can scrub through the full length
in LOUPE ... area where video clip normally displays and can be played/thumbnail chosen/still frames captured from video .... all displays as a GREYED OUT solid
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G0apher, Employee

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The Caches folder must be present at  /Users/<user_name>/Library/Caches/Adobe/Lightroom/Video/. The Library folder is usually a hidden folder. Scrubbing in the grid view plays different cached frames from the video file - so it is not essentially playing the video.

Are you able to import and play new videos? The screen going black could mean either the file is not accessible or the graphics driver is unable to play the video. From Activity Monitor, please check if there are any dynamiclinkmediaserver / dynamiclinkmanager processes running - and force quit them. Launch Lightroom again and try playing the videos.

Could you also share a small sample video so we can check it on our end as well? Thanks.
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Ian McNairn

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Hi GOapher ... perfect, the problem lay in the dynamiclinkmediaserver / dynamiclinkmanager processes that were running ... killed both processes .. restarted LR ... everything worked as per design ... I can play all videos as before.  The only thing I have been doing that is new and probably the cause/related, is working in After Effects and using dynamic linking to Cinema4D lite (as included in After Effects).  I will attempt to recreate the same usage pattern to see if I can replicate the problem, in which case I'll contact you here again.

Thanks so much for the speedy and useful advice, greatly appreciated !

(I am assuming you don't need any sample videos as they clearly weren't the cause ;-)

regards,
Ian
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G0apher, Employee

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Hi Ian, glad you can playback all videos as before!