LibRaw technical support

Stable LibRaw versions: technical support, errors, API questions

Unsupported file format or not RAW file even with USE_DNGSDK

Submitted by PseudoResonance on

I apologize in advance as my understanding of DNGs is very poor, but I thought that building the Adobe DNG SDK and building libraw with USE_DNGSDK and libjxl would allow it to unpack my phone's DNGs.

However, perhaps I was mistaken as it still complains "Unsupported file format or not RAW file" when I tried to open it with ImageMagick or the mem_image sample.

I published a reproducable repo here: https://github.com/PseudoResonance/immich-base-images/tree/dng

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Seeking guidance on achieving camera-like preview rendering with rawpy/libraw

Submitted by 8zelenooki7 on

Hello everyone,

I hope this message finds you well. I apologize in advance if this comes across as a beginner's question, but I'm hoping someone might be able to point me in the right direction.

I'm currently developing a photo correction application and have successfully implemented the desired features for standard image formats. However, I'm encountering challenges with RAW file processing that I'm struggling to resolve.

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Unsupported file format or not RAW file

Submitted by andrehoong on

Hello I have a couple of photos that cannot be opened using Libraw. The photos are from a Sony ILCE-7RM5. Some photos from this camera LibRaw can open while others it cannot. I am using the libraw-dev version 0.21.3-r0 which should support this camera according to this document.

https://www.libraw.org/news/libraw-202403-snapshot

Does anyone have an issue that is similar or know what I might be missing?

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Libraw bug report - libraw crash and core dump on digikam

Submitted by Miguel Rozsas on

on digikam, when scanning for faces, digikam crash and dump core with the message:

/run/media/miguel/RAW/miguel/RAW/2016/12/13/_DSF2806.RAF: data corrupted at 22980016
terminate called after throwing an instance of 'LibRaw_exceptions'

I've tried to attach the RAW file but the file type (RAF) it is not supported.

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What can cause different output inside Docker container?

Submitted by dmitri on

Hello,

I'm executing `dcraw_emu` inside a Docker container that uses `node:23-alpine` and the latest version of LibRaw.

When I run LibRaw to convert a DNG file inside the container running locally, I get good results. However, when the container is running on Digital Ocean, my results look very different: there's a lot of data lost in the output TIFF file that causes the result to look way too bright.

This happens only to a specific DNG file that comes from a scanner operated by SilverFast software. Other DNG files work fine and look the same on both systems.

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Unknown error code (0x16) returned by libraw_dcraw_process()

Submitted by marekp on

Having correctly unpacked my raw image into raw_image, I tried to use libraw_dcraw_process() to create a debayered image with params.half_size = 1 (as per sample code), but I get a return code 22 (0x16) which libraw_strerror converts to "Unknown error code". Any hints as to what might be wrong?

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JNA wrappers for LibRaw

Submitted by marekp on

I'm trying to write some JNA wrappers for LibRaw, but I'm struggling with the JNA spell for the raw data, specifically for the *raw_image member of the libraw_rawdata_t structure. I can access other members of this and other related structure as expected, but assuming that I would need to use a JNA Pointer type for *raw_image, I only ever get a null for this member after an unpack (no errors) call. I assume libraw.dlI allocates the memory for this data and return a pointer to a short array.

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