[Digikam-users] Update embedded JPEG of RAW Files
GDoirat - GMail
gaylord.doirat at gmail.com
Tue Nov 4 22:56:36 GMT 2014
I've just made some tests on 3 DNG Pictures.
This is working perfectly!
I test the full process until exporting on my piwigo gallery... Really
great; thanks a lot.
2014-11-03 23:45 GMT+01:00 GDoirat - GMail <gaylord.doirat at gmail.com>:
> Hi Elle,
> Thanks a lot for your answer.
> Sounds great. I will try this. As I have DNG raw file, i have to change to
> -ext DNG . Hopefully exiftool can read/write DNG !! [?]
> If this is working this will solve my problem.
> My workflow to process my rawfile would be then :
> - Import raw files in darktable
> - Rate (star) rawfiles in darktable
> - Developpe rated rawfiles (files not rated aren't good, so i don't
> loose time to developpe them)
> - Export Jpeg
> - Use ExifTool to update embedded JPEG of rawfiles
> - Erase Exported JPEG
> - Open Digikam : he will scan new files and import xmp info (number of
> star) and show me embedded JPEG updated
> - Finish to complete pictures informations in DK (localization, face
> recognition, tags, comments...)
> This will avoid me to have duplicated files (RAW + JPEG) which was really
> a pity for me.
> I will confirm if this okay in a futur mail, once I could try this more
> See you
> 2014-11-03 11:54 GMT+01:00 Elle Stone <ellestone at ninedegreesbelow.com>:
>> On 11/02/2014 06:04 PM, GDoirat - GMail wrote:
>>>> Hello Everybody
>>>> I use Digikam to manage my photo database for many years.
>>>> With my first camera, i took my pictures in JPEG... Digikam was really
>>>> I bought a SLR camera and started to took pictures in RAW.
>>>> I prefer to developpe my raw files in another software than digikam;
>>>> but i still really like photo database managment of DK. But preview of
>>>> raws are not updated when i do changes in the raw file (i'm using
>>>> Is there a way (a software included or not in digikam) to update
>>>> embedded raws with exported jpeg from darktable in order that digikam
>>>> display a raw preview which includes changes done in darktable?
>>>> My search on web make me realised that Lightroom seems to be abble to
>>>> do that but i didn't succeed in finding a way to to that on linux.
>> Hmm, I have also wished that I could overwrite the embedded preview jpeg,
>> and also always just assumed that you can't change the embedded preview
>> But actually it turns out that you *can* overwrite the embedded preview
>> using exiftool. It's a bit round about:
>> First develop the raw file.
>> Then save a copy of the developed raw file as a jpeg.
>> Then use exiftool to embed the "new preview" jpeg into the raw file,
>> writing right over the top of the orginal embedded jpeg.
>> See this page:
>> /////// Quoting Phil (exiftool author) from the above link:
>> If I understand you correctly, you want to write same-named
>> JPEG images as the PreviewImage for a set of CR2 files.
>> exiftool "-previewImage<=JPGDIR/%f.jpg" -ext cr2 CR2DIR
>> /////// end quote
>> I tested the command and it does work. "JPGDIR" and "CR2DIR" need to be
>> replaced with whatever directories the files are in (can be the same
>> It probably wouldn't be too difficult to write a script to automate the
>> process. Just make sure you test thoroughly on some throwaway images. I
>> managed to mess up a raw file by running the command with the wrong syntax.
>> I believe your new preview image must have the same size (and possibly
>> the same orientation) as the original preview, but I haven't confirmed.
>> I don't know which embedded file digiKam shows (there are several to
>> choose from), but I will guess it's the previewImage.
>> Also see reading and writing examples from http://www.sno.phy.queensu.ca/
>> Not every camera raw file has exactly the same set of embedded images.
>> For example, my canon raw files don't seem to have the "JpgFromRaw" that is
>> referenced in the exiftool reading and writing examples.
>> Digikam-users mailing list
>> Digikam-users at kde.org
> La vie est plus belle quand on est libre !
> @@@@@@ LINUX @@@@@@
> Libérez vos oreilles : www.jamendo.fr
La vie est plus belle quand on est libre !
@@@@@@ LINUX @@@@@@
Libérez vos oreilles : www.jamendo.fr
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