All my 5D mk II RAW pictures shot during an event are, when opened, kind of “negatived”…
Initially they look fine in the browser, but when I open them, they’re automatically rendered “negative”, and a .pp3 is automatically created.
The screenshot below shows exactly the problem. I isolated a picture, and a copy in /home/photo, and clicked the first. The 2nd one, not clicked, is still normal.
So I (Linux Ubuntu 18.04, latest RawTherapee (downloaded today))
removed all of ~/.config/RawTherapee
removed all of ~/.cache/RawTherapee
removed all *.pp3 to be sure
copied the pic and a copy into /home/photo, to be sure, again
but the problem still occurs.
I don’t think the problem is with the picture
it opened correctly with other software
it opened correctly in the RawTherapee of 2017
Also, I opened older 10D RAWs with no problem.
And a very recent a7R3 RAW with no problem either.
I dunno exactly what is happening, perhaps some failure of the automatic tone curve matching, but the Tone curve #1 in your screenshot looks like it would produce that image. Try making that tone curve more reasonable.
It seems indeed that the auto-tone-curve has some trouble with the 5D II, or at least these pictures.
But changing the curve to something more classic linear, or slightly S shaped gives a darker image which, once highlighted, shows the same over saturated image as the screenshot.
My hack software couldn’t demosaic, libraw didn’t provide a CFAPattern. dcraw did demosaic successfully.
After I successfully opened the image, I could approximately reproduce the look with a green channel tone curve of the same shape as the RT curve in the screenshot…
I know what he problem - RT dont understand low size RAW (from Canon - its right). You can`t to do something with photo in RT. Your photo in low size RAW - right?
This is probably a compressed RAW file, which is not yet supported in RawTherapee
This is a direct RAW file from the 5D mark II, from a camera released in 2008!
(Does the 5D2 have compressed RAW files? Anyway this one is definitely not compressed)
And, as mentioned in a previous comment, the same picture worked in 2017!
So, I compiled the source from 5.3 and…
it works using RawTherapee 5.3 (same pic, same place, after removing all .pp3 and config/cache files, as I did with 5.8)
It seems to be a bug in 5.8
(or, possibly in a library used by RT - note that I compiled using the latest libs available for Ubuntu 18.04, maybe that made a difference)
Edit +20 minutes:
I compiled 5.8 from source (install in /usr/local, after removing 5.3), using the same libs (as for 5.3) and
→ same problem as with the AppImage
→ so the problem is likely in RawTherapee
Thanks, great help.
Indeed the RAW is not compressed but is a “medium RAW” (half the pixels), and, tbh, completely forgot I shot this particular event in the mRAW format 3 years ago.
And confirmed: the latest build works fine with this mRAW format!