LibRaw technical support

Stable LibRaw versions: technical support, errors, API questions

Reading a file that is just 8 bit Bayer pixels

Submitted by crj11 on

I have a file from "fswebcam --dumpfile" that is just a stream of 8 bit pixel values. There is no other data in the file. Is it possible to read this into LibRaw and demosaic it into a file such as a TIFF or JPEG file? When I try to read the file in with imread(), it says that the file has an unsupported format.

Basically I want to be able to specify the XY size of the file and the pixel format so that LibRaw can read the file.

Thanks
Chris

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order of operations (matrix, white balance etc)

Submitted by laserpanda on

Hello

I'm experimenting with converting raw (Fuji RAF) files and im struggling a little bit to understand the order of how operations are done.

My expectation would be:

dcraw_emu -4 -r 1 1 1 1 -o 0 (raw) -> Camera2rgb matrix -> white balance mult -> srgb = good picture!

However, this results in an overly saturated image with blue colours going into negative values

so I tried a few other combos:

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libraw wide char format support on MSYS2

Submitted by lock on

Dear all,
I'm developing a software that uses libraw. This software is multi-platform and is able to run on GNU/Linux, OS X, FreeBSD and Windows through MSYS2.
Indeed, libraw is available on MSYS2 and that makes things easy. However there's a small issue that is kind of annoying: I cannot use the function 

libraw_open_wfile

as I would like to do. For example with libtiff i use TIFFOpenW.

Indeed, in libraw.h this line:

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LibRaw 0.19 Crashing DigiKam6 on macOS

Submitted by benjcmin on

Hi,
I have an issue with LibRaw 0.19 on macOS. I'm using DigiKam 6beta which now includes LibRaw 0.19 and this is crashing while scanning RAW (NEF) images from a Nikon D5300 12bit.
This is not happening with LibRaw 0.18.11 in an earlier build of DigiKam6beta

How can I help to track this bug down and get it fixed?

kind regards
Benjamin

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Libraw 0.19 crashes on macOS if used in a background thread

Submitted by lemkesoft on

Hi,

I use Libraw since some months in my app GraphicConverter 10 as optional RAW import.

I updated from the 0.18.x to version 0.19.
But the new version does crash if used in a background thread.

The crash occurs during initialization of the object:
LibRaw RawProcessor;

I attached a screenshot from the debugger.

Any help is appreciated.

Thorsten

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libraw_memmgr crash with 0.19.0?

Submitted by Kuro on

I've been using 0.18.7 fine for months, so today, I decided to try 0.19.0 Release.

Environment is macOS X Sierra, Xcode 8.2.1.

I've successfully compiled the code into a library object file and linked successfully with my macOS app (GUI app).

But when I create a new instance of LibRaw (LibRaw *rawProcessor = new LibRaw;), I got a crash on the following line in libraw_alloc.h:

libraw_memmgr(unsigned ee) : extra_bytes(ee)

What gives?

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libraw.so needed

Submitted by spatre on

Hi,

I was installing rawtoaces utility on Centos 7 and was facing an issue. I installed the latest LibRaw-0.19.0.tar.gz, and it seems to be giving me an error saying libraw.so is needed. I can't find libraw.so in /usr/lib64/. Could you kindly let me know a workaround? Thanks in advance. PFA the error screenshot.

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