Batch RAW-Conversion to jpg leads to unusable jpg / tiff when using all kernels

fotografie fotografie at
Mon Aug 28 10:07:24 BST 2017


I have a problem which exists from digikam 5.20 to digikam 5.70.

I really do batch conversion of NEF-rawfiles very often. The cameras are
a D300, a D500, a D5300 and a D5500. The problem exists with every camera.

My batch processing has the following workflow:

- lens correction (according to the lens I used, Nikon 24-120, Tamron
16-300, Tamron 17-50, Tamron 24-70 and Tamron 70-200)

- noise reduction

- local contrast

- sharpening


- save as jpg (same problem with save as tiff)

First of all I check the files for the used lens, All pics of the same
lens go to one queue. So there is a queue named 17-50 which holds all
pics taken with the Tamron 17-50.

Then I use the tabs of the queue defintions (lower left part of teh
screen), select the export directory, set the rename options, and when I
use teh point: use all kernels on the third tab it leads to jpg /tiff
which only consists of colors. It is independent whether I work with the
computer during batch conversion or let it work without having any open

What I did to find out why it happens:

- step by step i removed the tools from the workflow. For example the
first step was to remove BCG, but the error exists. The second test was
to remove Sharpening, then local contrast, then noise reduction and then
lens correction. But nothing helped.

The good jpg file has a size of about 5 MB the unusable file has a size
of about 25 MB ?!

My system:

System: Host: ulf-mint-18 Kernel: 4.4.0-21-generic x86_64 (64 bit gcc:

Desktop: Cinnamon 3.2.7 (Gtk 3.18.9-1ubuntu3.3) dm: mdm Distro: Linux
Mint 18.1 Serena

Machine: Mobo: Gigabyte model: GA-MA770-UD3 v: x.x Bios: Award v: F9g
date: 07/08/2010

CPU: Quad core AMD Phenom II X4 955 (-MCP-) cache: 2048 KB

flags: (lm nx sse sse2 sse3 sse4a svm) bmips: 25781

clock speeds: min/max: 800/3200 MHz 1: 800 MHz 2: 3200 MHz 3: 2100 MHz
4: 800 MHz

Graphics: Card: NVIDIA G96 [GeForce 9400 GT] bus-ID: 01:00.0 chip-ID:

Display Server: X.Org 1.18.4 drivers: nvidia (unloaded: fbdev,vesa,nouveau)

Resolution: 2560x1440 at 59.95hz

GLX Renderer: GeForce 9400 GT/PCIe/SSE2

GLX Version: 3.3.0 NVIDIA 340.102 Direct Rendering: Yes

Audio: Card-1 Advanced Micro Devices [AMD/ATI] SBx00 Azalia (Intel HDA)

driver: snd_hda_intel bus-ID: 00:14.2 chip-ID: 1002:4383

Card-2 Creative Live! Cam Chat HD [VF0700]

driver: USB Audio usb-ID: 002-002 chip-ID: 041e:4088

Sound: Advanced Linux Sound Architecture v: k4.4.0-21-generic

Network: Card: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet

driver: r8169 v: 2.3LK-NAPI port: de00 bus-ID: 04:00.0 chip-ID: 10ec:8168

IF: enp4s0 state: up speed: 1000 Mbps duplex: full mac: <filter>

Drives: HDD Total Size: 10014.0GB (61.3% used)

ID-1: /dev/sda model: SAMSUNG_HD204UI size: 2000.4GB serial: S2H7J1BZB12304

ID-2: /dev/sdb model: ST2000DL003 size: 2000.4GB serial: 6YD0MAC9

ID-3: /dev/sdc model: SAMSUNG_HD154UI size: 1500.3GB serial: S1XWJ1KS924182

ID-4: /dev/sdd model: TS512GSSD320 size: 512.1GB serial: B360701044

ID-5: /dev/sde model: WDC_WD40EZRX size: 4000.8GB serial: WD-WCC4E1364197

Thanks in advance for any help

Best regards


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