Accessing contents of .lrprev files

[Bentron_2000]

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

[Akash Sharma]

Moving to Lightroom SDK​

[garmart]

Forgive me for replying to this post to ask a question, but I recently experienced a crash where the catalog became corrupt and I also lost all my photos taken on 9/12. I noticed that I have .lrprev files for that date and would like to view them. Would you please tell me what program I can use to view them? Thanks

[Rob_Cullen]

There are Plugins that can 'Extract' JPGs from Catalog Previews, BUT I believe you will need the working Catalog. If its is corrupt you may be SOL.

Do you NOT have file backups of BOTH the Catalog AND the photo files?

https://helpx.adobe.com/lightroom-classic/kb/extract-previews-for-lost-images-lightroom.html

https://www.lightroomqueen.com/accidentally-deleted-photos-hard-drive-dont-backups-can-create-jpegs-...