Lightroom runs out of memory exporting a 1080p slideshow with 1,200 photos

Question

I'm trying to export a 1080p video from a Lightroom slideshow that contains about 1,200 photos, but my Mac reports that the application has run out of memory during export. I've already tried clearing cache and restarting the computer, but it still fails.

I’ve already done the sequencing and processing in Lightroom, so I’d prefer not to rebuild the slideshow in another app. Is this a Lightroom limitation, or is the slideshow simply too large? What are the practical ways to get it exported successfully?

user15871 · Accepted Answer

It's probably not the application so much as it is the size of the data you are including. You've got two basic choices:

Add more RAM to your machine. You need enough to load all of the images at the same time. I'm not a MAC guy, but you may also be able to increase the amount of disk space allocated as "virtual memory" (Swap).
Divide the show into several smaller segments. You can probably copy the project (which is just a set of instructions about what to include when the video is rendered), then delete a portion from each copy until you find a size small enough that your machine can handle it.

Lightroom runs out of memory exporting a 1080p slideshow with 1,200 photos

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