LibRaw technical support

Stable LibRaw versions: technical support, errors, API questions

did 4channels loose the -N option?

When I run 4channels, I get:

4channels -N A.NEF
4channels - LibRaw 0.21.1-Release sample. 1182 cameras supported
Usage: 4channels [-s N] [-g] [-A] [-B] [-N] raw-files....
-s N - select Nth image in file (default=0)
-g - use gamma correction with gamma 2.2 (not precise,use for visual inspection only)
-A - autoscaling (by integer factor)
-B - no black subtraction

What does -N do? Since it is described in the Usage line I expected it to work and have an explanation like -B and the others. What gives?

Cheers,

Peter

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DNG with jpeg-xl compresseion

Hello,

Reading some posts in the XnViewMP forum, I found a DNG image that LibRaw does not convert into a JPEG image.
Please see: https://community.adobe.com/t5/camera-raw-discussions/samsung-s24u-exper...

I use the latest libraw compiled without dng-sdk.
The error message is: Cannot open : Unsupported file format or not RAW file

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RawSpeed Licensing vs. CDDL LibRaw

I am interested in using RawSpeed 3. I pulled the code via the LibRaw page:

https://github.com/LibRaw/LibRaw/tree/0.21-stable/RawSpeed3

I am using LibRaw with the CDDL license, but the RawSpeed code has a license file which only seems to have an LGPL license.

Is that LGPL license not applicable in this case? Is there a way to use RawSpeed through the CDDL license?

Thank you.

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libraw with Adobe DNG SDK problem

Hi Team,

I'm currently building a dll using libraw with adobe dng sdk to be used in windows appplication. I have followed the instructions in README.DNG.

I have created a DNG SDK 1.4 static library and linked in the libraw project. I have also included the directory of adobe dng src to libraw project. I did defined qWinUniversal in dng_sdk project.

I have defined USE_DNGSDK in the libraw project and upon compilation the following errors were prompted (see attached screenshot). It seems like it cannot locate the definition body in the dng_sdk lib.

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