You can limit the cache size to 1 or 2GB for the video cache by going under Preferences > File Handling > check the option "limit video cache" and mention the value under Maximum Size.
This would limit the size of the video cache and you would not have to manually purge the cache everytime.
This setting, has NO effect on the directory I mentioned. Other users will be able to confirm this.
This is a redhibitory problem for me.
I recently purchased a yearly license, but I won't be able to use this product because of this issue.
I use lightroom 2015.2.1
This is a known issue in Lightroom when you work on video files in Lightroom or at the time of import when Lightroom tries to read the video files.
Do you regularly work on video files in Lightroom?
Or, does the source location for import in Lightroom generally contain video files?
The initial import location contains lots of videos files yes. I won't be importing from there on subsequent import.
So there is no way to disable this behavior ? Is this considered a bug ? Will it get fixed ? Really it is causing lots of troubles.
What happens, after everything is initially imported, and I purge the cache.
When I import again, will the 150 Gigas of videos be ALL indexed again ? Or when I work on a particular video file, will it just index that video file, or the 150 gigs in child / sibling folders ?
There really should be a way to prevent this, like really controlling the max size of this cache folder.
Yes, Lightroom will again create the cache whenever you will go to that location which contains videos as the source of import.
This has been logged as a bug and the engineering team is working on it currently to resolve it.
The only workaround for now is to manually purge the cache time to time.
Ok thanks for your answer, good to know it's been taken care of.
Do you know if this will be fixed in the next release ?
We do not have that specific release version information for now but it will surely be taken care of.
Has this been fixed in 17 november update ?
No, this has not been fixed yet.
Well i don't think i'll be subscribing when my trial ends- took a while to understand why my brand new desktop was bogging. LR has filled my SSD.
This is an interesting problem and also seems to be the cause of a lot of my problems. When you say " source of Lightroom": Do you mean sources where the current catalog points to? So files outside the catalog are not effected? Let me add, that it seems that slower Windows PC simply have an issue with bookkeeping for that growing cache folder and then simply, refuse to play them, or play them delayed. What happens if I remove LR access rights to that folder, or make it dissapear?
The phrasing in the previous replies says “sources for import” and the pre-caching of videos happens relative to folders in the Import panel as you’re clicking down through subfolders to get to the one you want to import photos from.
The original problem was the pre-caching included all videos in any folder and its subfolders that you clicked on while finding the folder you wanted to import from. This included merely clicking the arrow to expand the top-level drive to see its subfolders, so effectively LR was scanning the entire import source drive every time you imported from it.
Now the subfolders part of the problem has been removed and LR seems to only pre-cache videos that show up in the import thumbnail grid as you’re clicking down into where you want to import from, but you have to be fast and not let the grid populate as you’re clicking down to find the folder to import from.
In my opinion LR shouldn’t be caching ANY VIDEOS during the folder selection process and at most should only cache videos that are being imported, and any pre-cached videos should respect the video-cache-limit set in LR, which isn’t used, now. Some people even want to turn off the video cache, entirely.
It’s one thing to cache the videos you’ve actually selected and want to edit in LR, it’s another to guess what possibility might ever be used in LR and pre-cache those as well, which is where the problem lies, and not respecting the video cache limit for the pre-caching.
So, once I finished importing and deleted the video cache´s content, all is fine? Or will LR re-cache when I simply work with the catalog and the develop module?
Currently as of 6.3/2015.3:
LR will cache videos you work in on LR.
LR will pre-cache videos that are shown in the Import grid, whether or not you ultimately import them, and these pre-cached videos don't count against the video-cache limit so can eat up your entire SSD if you're not careful.
So if you do either of these things, again, those particular videos will return to the cache, at least until Adobe decides to modify how pre-caching works, then probably/hopefully only videos you Import will be cached.
was this fixed in January 2016 update ?
Thanks, and what if I set this value to 0, will it prevent video caching ?
I seem to remember a similar problem with the ACR cache in Lightroom. One of the answers to that was to make the acr cache folder 'read-only' and that stopped LR filling it with cached files. Have you tried that with the video cache?
This advice does not work. My LR settings show Video Cache limit set to 3GB. I just bought LR a few days ago, and during the import process, thank god I noticed that I only had 50GB free on my hard drive. While watching over 10 minutes, free HD dropped to 25GB. I killed LR, powered down my Mac and the external drive from which I was importing pictures. Restarted the Mac, and thank god the free space eating bug was no longer eating free hard disk space.
Went through my hard disk directory by directory narrowing down the source, and found the Media Video Cache directory with 202 GB of junk cache files! The Purge Cache button function does not work either.
Why is LR not abiding by the cache limits set in the application preferences?
What's the situation ? Apparently this is not fixed. Is it ?
It's been a year almost since I avoid using lightroom because of this. Today I made the mistake to update it which opened it. It launched again a full video indexing, almost filling my entire ssd before i was able to stop it. What a waste.
Why not move the video file out of the LR catalog. Then use a program that is made for video editing for those files.