DNG files render with wrong colors/lighting

[DawidPietrykowski]

After loading my library, I noticed that theres a lot of dark images from a few days. It turns out I was on a trip and I was taking photos in RAW, so DNG files from my Pixel4a.

This is what the image looks like in the browser:

This is what it should look like:

Example image: PXL_.tar.gz

I'm running it with docker-compose.

[SmilyOrg]

Nice shot! 🙂 This seems to be an issue in FFmpeg, all the raw files I tried either didn't render at all or they were very dark.

Perhaps I can tell it to bump up the brightness just for these specific raw file extensions? Ultimately for proper support I might have to integrate something else, like libraw.

Thanks for the sample! Somehow they're not that easy to get. 😁

[DawidPietrykowski]

Interesting, did you check some other DNG files? Maybe it's just my phone format being wrong in a slight way, I will try to check some other files from different devices.

I will try to reproduce it with ffmpeg and check if there's a way (maybe some additional options) to make it output images with the right look.

[SmilyOrg]

Interesting, did you check some other DNG files? Maybe it's just my phone format being wrong in a slight way, I will try to check some other files from different devices.

Yeah, I tried it with some examples I grabbed online from Signature Edits, you can see that they're also dark in the demo.

I will try to reproduce it with ffmpeg and check if there's a way (maybe some additional options) to make it output images with the right look.

That would be very helpful, thanks! :)

[DawidPietrykowski]

Unfortunately I wasn't able to fix the issue completely, but I managed to come up with some options that make it look close to the target images (at least for my samples).

I also found some forum posts complaining about this issue, but found no solution.

Here's what I got:

With cli command: ffmpeg -i PXL_.dng -vf eq=brightness=1.1:saturation=3:contrast=3.4:gamma=2 PXL.jpg

But more importantly, I also tried it with imagemagick, and it worked great out of the box: magick PXL_.dng PXL.jpg

So I guess switching to it for this format might be a solution, but I know that adding additional dependencies is not always the best options so I guess you'll do what you find best :)

[SmilyOrg]

Hey, 0.9.4 has that hack now integrated. For proper support I'll have to look into something else like imagemagick as you say, but I'm afraid to bring in that rabbit hole of a dependency 😅

[SmilyOrg]

Thanks for the help!