Accessing contents of .lrprev files

Hi All,

I am building a plugin that would like to take advantage of the biggest preview available in the lightroom cache.

I have played with a few different tools that read previews from these files - and the largest most of them can pull out is 'level_5'.

A manual inspection of a .lrprev file would seem to indicate that there is additional preview data at 'level_6' and 'level_7' in there.

Has anyone had any luck accessing these larger previews?

Ideally I'm seeking some means by which I can parse out these previews as separate files/streams for use in my plugin.

- Feel free to offer wisdom in whichever language you like to work in - I've inspected partial solutions in C/C++, Python and Lua. e.g.

- Perhaps the larger versions are not in JPEG/JFIF format and that's why they don't parse out as readily?

- I'd prefer to work only with the .lrprev files rather than have to access the sqlite db - it would seem superfluous considering the UUID can be retrieved from the SDK and the .lrdata is structured using a tree built from the first 4 characters of it.

Any thoughts and tips on this would be greatly appreciated.

Thanks!

B