Hello everyone, is there a way to open and process compressed dng files with rawtherapee?
I’ve created files because I was not concerned with failures from compressing pics but I wanted to take advantage of the color range instead.
Many thanks, Michael
Which version of rt do you use?
Hi, it’s the current one. I can open uncompress dng, but not the compressed ones.
fwiw, if you create a compressed dng with Adobe dng converter, then RT can’t open it. actually, it doesn’t even appear in the browser. last time I checked (a few months ago) the dcraw code was #ifdef’d out (though I might remember wrong)
You’re right. Alberto, the file won’t appear in the browser. Do you know whether there are plans to get it back in?
I used the DNG converter. I have scanned lots of pictures and want to preserve the colors. Artefacts from compressing is not that much of concern for me.
Hi, here are three pics: the CR2, the uncompressed DNG and the compressed one. But I guess we won’t need them any longer.
https://filebin.net/d3341s9rjr0cqlkd
I don’t know of any plans, sorry. In fact, I’m not even sure why the code is commented out. I just tried a quick hack to put it back in, and it seems to work fine on my machine (warning: with only very limited testing). Here is the patch if someone is interested.
Maybe some of the RT developers know?
lossy-dng.patch (1.1 KB)
@agriggio Thanks for the patch. I tried it and it works fine. Don’t know why this was disabled and when. Must have been before my time 
Can you make a pr for it to get more tests?
You guys are incredible! Thx!
Hi, one question please: what is the process for a pr? Is there something I would have to do?
A PR, or pull request, is a workflow feature in github/github-like source hosting systems. You can read about it here: https://help.github.com/articles/creating-a-pull-request/
@Michael2 You don’t have to make a pr. Alberto already did and also fixed the issue It’s already in current rt code. You only have to wait for a new build.