[Digikam-users] Large JPG sizes produced by RAW Image batch converter

Gilles Caulier caulier.gilles at gmail.com
Sat Dec 26 17:42:12 GMT 2009


Use digiKam 1.0.0, with Batch Queue Manager.

Set you RAW in a queue, set a batch tool to convert JPEG and adjust
settings in right panel.

RAW decoding settings is common for all (at this time). Go to digiKam
setup and look if all is right for you in RAW setup.

For next release, i plan to add a dedicated Raw decoding setting for a queue.

The kipi-plugin RAW batch converter do not have a setting to adjust
JPEG compression.

Gilles Caulier

2009/12/26 Rei Shinozuka <shino at panix.com>:
> First, I hope everyone enjoyed a wonderful Christmas.
> I've been a digikam user for 2-3 years, ever since I got my first camera
> which made RAW images.
> I sometimes use RAW+JPG output on my camera, but on my camera (Leica M8)
> it slows down processing noticably, so I'd rather do that processing on
> my computer.  I can use digikam to make JPGs in the RAW Image Batch
> Converter, which does its job very well.
> The Raw files (DNGs) are 10.1 MB from the 10.3 megapixel camera, and
> in-camera JPGs range from 2.3 to 3.1 MBs.
> When I use Digikam's Batch Converter to make JPGs from DNGs, they are
> much larger than in-camera JPGs, say 7-11MBs compared to 2-3MBs.  I
> generally don't use JPGs for "critical" use, so perhaps the
> Digikam-produced JPGs are set to a very high quality?  (When I save JPGs
> and have the option to choose quality, I usually use a quality of
> 92%-95% or so).
> Is there a way of adjusting quality of JPGs in Digikam raw image batch
> converter to result in smaller 2-3MB JPGs?
> Thank you very much,
> -rei
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