There were a couple of portrait images in my slide show of 3500 images (at 10 fps) in LR on Windows. Removing them did not fix the problem. Tried exporting as jpgs, importing them to a new collection and creating a slide show from them as sugested in this thread but that did not help. Evcentually determined that LR was creating a png cache file for each image of the slideshow in the C:\Users\USERNAME\AppData\Local\Adobe\Lightroom\Caches\velo directory and it was filling up the C drive. Once the process errored out it would delete all the cache files so you wouldn't see that was the problem.
There is no way to change the location in LR of where the application stores these cache files, its on the same drive as where LR is installed.
- I closed Lightroom.
- Moved the C:\Users\USERNAME\AppData\Local\Adobe\Lightroom\Caches directory to a new location, D:\Lightroom\Caches.
- Opened a Command prompt console in admin mode and used mlink to create a hard symbolic link (option /D) to the new location:
- C:\WINDOWS\system32>mklink /D C:\Users\USERNAME\AppData\Local\Adobe\Lightroom\Caches D:\Lightroom\Caches
- The commands output is "symbolic link created for C:\Users\richardj\AppData\Local\Adobe\Lightroom\Caches <<===>> D:\Lightroom\Caches"
Reran the export video command which was successful. Looks like I needed close to 40GB free diskspace to make the video and the C drive only had 25GB free space.
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