I've got a question concerning those preview images. I wrote a plugin which uses the actual paths of the photos in the catalog an stores those paths of each photo into a log file. Then an external program has access to that file for further handling. So now I would like to use preview photos instead of the raw images. First, because the user might want to use the picture he/she edited with Lightroom; And then because of the size.Processing a preview image of level 5 would be more efficient than the original photo.
So how can I get those preview photos? And more important: is it possible to store them in an extra file in a jpg format for instance, so that an external program can make use of them?