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

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

Hi dev~

I used libraw_open_file open my sony ARW photo file, that return -2 error code, but I found our Supported cameras has supported Sony A7M4, can you help me update my code? :(

Hi Team,

I'm just starting to learn about libraw and playing around the dcraw_emu. In the old dcraw, there is an option to write image data to standard output, "-c".

I wonder if there's a same functionality in dcraw_emu (based on libraw) or if none, is there a way to achieve the same functionality?

Hi Team,

I have a DNG file and tried to decode it libraw without Adobe DNG SDK.

When I tried to open_buffer, load_raw was identified as lossy_dng_load_raw but then raw_count is zero so it returned -2.

Do I need to use Adobe DNG or is it expected to work just with libraw?

I have attached the image in this link, https://drive.google.com/file/d/18QaZiL_YBEXwrmKd9638zHuWpOo54V5y/view?u...

Thank you and best regards,
Fidel