Problem with cameras/Megapixels?

[Eugo]

Here's what I'm getting today:

Code:

Unrecognized renderer "ngl". Try GSK_RENDERER=help
MPCamera: VIDIOC_SUBDEV_S_FRAME_INTERVAL error 22, Неисправан аргумент
Initialized OpenGL ES 2.0
MPCamera: VIDIOC_QBUF error 22, Неисправан аргумент
TIFF version 20221213
Writing frame to /tmp/megapixels.JUSdn5/0.dng
Making thumbnail
TIFF version 20221213
Writing frame to /tmp/megapixels.JUSdn5/1.dng
Post process /tmp/megapixels.JUSdn5 to /home/manjaro/Pictures/IMG20230309121216.ext (save-dng 0)
postprocessd: error while loading shared libraries: libraw.so.20: cannot open shared object file: No such file or directory
MPCamera: VIDIOC_SUBDEV_S_FRAME_INTERVAL error 22, Неисправан аргумент
MPCamera: VIDIOC_QBUF error 22, Неисправан аргумент
TIFF version 20221213
Writing frame to /tmp/megapixels.COssZO/0.dng

... where „Неисправан аргумент“ means bad argument. I've checked for libraw.so.20 in /usr/lib/ and there's only libraw.so.23.0, which worked fine in my previous distro (megi's, as of august, updated about six weeks ago).

I got this by launching megapixels through ssh from my (Mint 20) PC, so I can easily copy and paste here.

I'll try with pacman -Syu and plan to return here shortly.

---

pacman -Syu did almost nothing - well, the distro I'm using was installed yesterday, no wonder.

So, how do we tell megapixels to use libraw.so.23.0 instead of looking for .20?

[Eugo]

I supplied the .20, but then it complained about other libs from the raw/mpeg package.

[Eugo]

Found it: two out of three postprocessing options don't work - the first one, marked as „(built-in)...“ does. The slow one complains of libraw being the wrong version, the quick one of libtiff.

Just click at the cogwheel button (bottom left) and select the default postprocessing. That's it.

[Eugo]

Found a comment somewhere in some postprocess.sh „[some distro name] broke libtiff“ so okay, I didn't plan to use tiff anyway.

The current trouble is that the pics are coming out mostly overexposed (both .dng and .jpg), I have to tone them down about 1,5 to 2 f-stops, and they're too green. When I use RawTherapee to convert the .dng into .jpg, the color correction has green=0.414.

I've compared the files in /usr/share/megapixels/config/ with those in my previous version (manjaro phosh beta 26 vs 21) and they are identical. So... if not the .ini files there, then where?

[alaraajavamma]

In Manjaro you can install postprocessd from AUR and that one will work.
But it will still be too green

If you want to try I think luigi311 script will produce images without green tint.
https://github.com/luigi311/megapixels_postprocess

[Kevin Kofler]

The "too green" part is a kernel bug/regression, see https://forum.manjaro.org/t/kernel-fix-f...640/136430 for a description of the issue and for a fixed kernel.

[Eugo]

Apart from the internal incomprehensive language of git (why, oh why is download called clone?), there's one thing that I never get from these .md files: where do I put the files?
I've put it on /usr/share/megapixels/megapixels_postprocess-main/ and got myself into a trap with that. As a regular user I can't cd into that folder; as root I can't run setup.sh

And the link in the other response, about the fixed kernel, is a 404.

[Eugo]

Few hours later, I still can't get it done. I assumed I put the scripts in the protected area where they are a bit unusable, so I put them into a folder below ~/Downloads. Trying to run „sudo ./setup.sh“ detects root and refuses to run, says „Script must not be ran as root“. When running as manjaro, it reports
chmod: мењам овлашћења за „'/home/manjaro/.config/megapixels/postprocess.sh'“: Радња није допуштена
(changing authorization for ... operation not permitted)

So... what am I doing wrong?

[Eugo]

The solution, so far, is to keep the .dng files and process them in RawTherapee, just like I do with Canon's raw files. Works like a charm. The only downside is that I don't have the correct versions in the phone, to, say, send via Telegram.

The correction needed is green=0.412, is there any config file where I can put that? Or is it something I can do with the existing postprocess.sh?

[Kevin Kofler]

Well, you are much better off just using a fixed kernel. The linked artifact has expired because it is no longer the latest kernel build. Try this one:
kernel 6.1.21-1
This has the fix from 6.1.12-2 and also upstream bugfixes from 6.1.12 to 6.1.21 (i.e., 9 bugfix releases newer).