[digiKam-users] Metadata for RAW files

Gilles Caulier caulier.gilles at gmail.com
Sat Jun 22 14:10:26 BST 2019


Even if RAW files are mostly based to TIFF/EP standard, there are plenty of
proprietary chunk/tags/container included in the tree of file and it's a
very bad idea to try to write RAW metadata in file. RAW files must be
considerate as read only and XMP side car used instead.

Best


Gilles Caulier

Le sam. 22 juin 2019 à 12:48, Rafael Linux User <rafael.linux.user at gmail.com>
a écrit :

> Metadata I want to change it's not photo parameters related, but "Autor",
> "Credits", "Copyright" .... and so on. I have activated "read" and "write"
> to "Element and in XMP sidecar", and I understand in RAW files case, it
> should be write only to XMP files, not inside RAW files, that's fine.
> Despite that, I only can change or "enable" checkboxes when over non RAW
> files. In this screenshot, you can see I selected a RAW file and try to
> change the "Credits" ... no option to do nothing about it.
>
> [image: image.png]
> However, if I select a TIFF file, I can enable/disable and write metadata
> for "Credits".  :(
>
> El vie., 21 jun. 2019 a las 17:50, Remco Viëtor (<remco.vietor at wanadoo.fr>)
> escribió:
>
>> On vendredi 21 juin 2019 13:42:53 CEST Rafael Linux wrote:
>> > As I always work from RAW, I would like to document my RAW files
>> metadata
>> > so, when creating exported versions of these RAW files, the metadata
>> > automatically spread to the new files. However, I can edit metadata for
>> my
>> > RAW files from Digikam, and I guess it will be saved to XML files.
>>
>> It depends on which metadata you want to change. Certain items should not
>> be
>> changed (e.g. original creation date, photographic information like
>> F-stop,
>> shutter speed, ISO setting), others should be written only once
>> (creator...),
>> and some aren't really useful on a raw file, or can change for every
>> export
>> (e.g. licensing info).
>>
>> Also note that saving to XML files is optional, and writing to raw files
>> is
>> strongly discouraged. So if you have both "writing to raw" and "writing
>> to
>> sidecar XMP files" disabled, dk can't save the metadata other than to its
>> database (which is done in any case).
>>
>> > The fact
>> > is that I can access to "Edit metadata", but I can't change the info.
>> > Is a nonsense what I pretend or there is another way to do what I want?
>>
>> I suppose you noticed that, in the "edit metadata" dialog, a lot of items
>> have
>> to be explicitly enabled by clicking a checkbox...
>>
>>
>>
>> Remco
>>
>>
>>
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