Are ratings and tags saved in metadata?

[Chris Green]

Are picture ratings and tags saved into the picture metadata
somewhere?  If they are can someone tell me where they are stored
because I want to use them to select pictures to display in other
applications.

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[jag59]

Ratings are  stored  in Exif Under Windows Rating,
Tags at IPTC under Keywords and in XMP under Subject.
This is when seen in Gwenview 2.5.0.of KDE 4.5.1.
The application should be able to search these fields.
 

Chris G-6 wrote

Are picture ratings and tags saved into the picture metadata
somewhere?  If they are can someone tell me where they are stored
because I want to use them to select pictures to display in other
applications.

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[Chris Green]

On Tue, Sep 07, 2010 at 09:54:45PM -0700, jag59 wrote:

> Chris G-6 wrote:
> >
> > Are picture ratings and tags saved into the picture metadata
> > somewhere?  If they are can someone tell me where they are stored
> > because I want to use them to select pictures to display in other
> > applications.
> >
>
> Ratings are  stored  in Exif Under Windows Rating,
> Tags at IPTC under Keywords and in XMP under Subject.
> This is when seen in Gwenview 2.5.0.of KDE 4.5.1.
> The application should be able to search these fields.
>  

OK, thanks.

Is there any way in digikam to see all of the metadata laid out in a
fashion that makes it easy to see the keynames for each item.  As it
is there are many ways of accessing the metadata and it's difficult to
see which are actually the same and which are different.  I.e. one can
see:-

    Select 'Captions/Tags' on the RH menu and you see Caption, Date,
    Rating and Tag.

    Select 'Colours' and you see some some colour 'Header' information.

    Select 'Metadata' and there are EXIF, IPTC, Makernote and XMP tabs
    but, as far as I can see, Captions, Tags and Ratings are not shown
    here even though they are actually metadat.

    Select 'Properties' and you see yet *another* selection of fields
    from the metadata (at least I assume that's what is being shown).
   

Then there is Image->Metadata in the menu which allows editing of the
metadata but again doesn't show the actual EXIF/IPTC keywords so again
there's no way of knowing what you're actually altering or how it
relates to the tabs above.  Also, again, ratings and tags can't be
changed here although they are atually metadata.

Can we not have a way of showing the 'raw' metadata somewhere?  I need
this so that I can write utilities to access (and set) metadata fields
in a way that I can use in digikam.


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[Gilles Caulier-4]

2010/9/8 Chris G <[hidden email]>:

> On Tue, Sep 07, 2010 at 09:54:45PM -0700, jag59 wrote:
>> Chris G-6 wrote:
>> >
>> > Are picture ratings and tags saved into the picture metadata
>> > somewhere?  If they are can someone tell me where they are stored
>> > because I want to use them to select pictures to display in other
>> > applications.
>> >
>>
>> Ratings are  stored  in Exif Under Windows Rating,
>> Tags at IPTC under Keywords and in XMP under Subject.
>> This is when seen in Gwenview 2.5.0.of KDE 4.5.1.
>> The application should be able to search these fields.
>>
> OK, thanks.
>
> Is there any way in digikam to see all of the metadata laid out in a
> fashion that makes it easy to see the keynames for each item.  As it
> is there are many ways of accessing the metadata and it's difficult to
> see which are actually the same and which are different.  I.e. one can
> see:-
>
>    Select 'Captions/Tags' on the RH menu and you see Caption, Date,
>    Rating and Tag.
>
>    Select 'Colours' and you see some some colour 'Header' information.
>
>    Select 'Metadata' and there are EXIF, IPTC, Makernote and XMP tabs
>    but, as far as I can see, Captions, Tags and Ratings are not shown
>    here even though they are actually metadat.
>
>    Select 'Properties' and you see yet *another* selection of fields
>    from the metadata (at least I assume that's what is being shown).
>
>
> Then there is Image->Metadata in the menu which allows editing of the
> metadata but again doesn't show the actual EXIF/IPTC keywords so again
> there's no way of knowing what you're actually altering or how it
> relates to the tabs above.  Also, again, ratings and tags can't be
> changed here although they are atually metadata.
>
> Can we not have a way of showing the 'raw' metadata somewhere?  I need
> this so that I can write utilities to access (and set) metadata fields
> in a way that I can use in digikam.

By default Metadata view on RH use user mode to sort exif/iptc/xmp
tags. Turn this mode to "full" using button on the top. That all

Gilles Caulier
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[Gilles Caulier-4]

Also, by default, digiKam do not touch your image metadata. Go to
setup/metadata config panel to turn on the right options

Gilles Caulier

2010/9/8 Gilles Caulier <[hidden email]>:

> 2010/9/8 Chris G <[hidden email]>:
>> On Tue, Sep 07, 2010 at 09:54:45PM -0700, jag59 wrote:
>>> Chris G-6 wrote:
>>> >
>>> > Are picture ratings and tags saved into the picture metadata
>>> > somewhere?  If they are can someone tell me where they are stored
>>> > because I want to use them to select pictures to display in other
>>> > applications.
>>> >
>>>
>>> Ratings are  stored  in Exif Under Windows Rating,
>>> Tags at IPTC under Keywords and in XMP under Subject.
>>> This is when seen in Gwenview 2.5.0.of KDE 4.5.1.
>>> The application should be able to search these fields.
>>>
>> OK, thanks.
>>
>> Is there any way in digikam to see all of the metadata laid out in a
>> fashion that makes it easy to see the keynames for each item.  As it
>> is there are many ways of accessing the metadata and it's difficult to
>> see which are actually the same and which are different.  I.e. one can
>> see:-
>>
>>    Select 'Captions/Tags' on the RH menu and you see Caption, Date,
>>    Rating and Tag.
>>
>>    Select 'Colours' and you see some some colour 'Header' information.
>>
>>    Select 'Metadata' and there are EXIF, IPTC, Makernote and XMP tabs
>>    but, as far as I can see, Captions, Tags and Ratings are not shown
>>    here even though they are actually metadat.
>>
>>    Select 'Properties' and you see yet *another* selection of fields
>>    from the metadata (at least I assume that's what is being shown).
>>
>>
>> Then there is Image->Metadata in the menu which allows editing of the
>> metadata but again doesn't show the actual EXIF/IPTC keywords so again
>> there's no way of knowing what you're actually altering or how it
>> relates to the tabs above.  Also, again, ratings and tags can't be
>> changed here although they are atually metadata.
>>
>> Can we not have a way of showing the 'raw' metadata somewhere?  I need
>> this so that I can write utilities to access (and set) metadata fields
>> in a way that I can use in digikam.
>
> By default Metadata view on RH use user mode to sort exif/iptc/xmp
> tags. Turn this mode to "full" using button on the top. That all
>
> Gilles Caulier
>

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[Chris Green]

On Wed, Sep 08, 2010 at 11:28:45AM +0200, Gilles Caulier wrote:
> 2010/9/8 Chris G <[hidden email]>:
[snip]
> >
> > Can we not have a way of showing the 'raw' metadata somewhere?  I need
> > this so that I can write utilities to access (and set) metadata fields
> > in a way that I can use in digikam.
>
> By default Metadata view on RH use user mode to sort exif/iptc/xmp
> tags. Turn this mode to "full" using button on the top. That all
>
I have it set to "full", it still doesn't show the image's Rating, nor
the Caption or the Tags.  It doesn't show the 'real' names of the
fields either.

Or maybe I'm getting confused by Digikam not writing the Rating,
Caption and Tags to the metadata.  I have set to write metadata in
Metadata/Behaviour in the Configure area but I can't see the Tags,
Caption or Rating in the metadata (using Digikam or my utilities).

Further, what do the 'EXIF Viewer', 'IPTC Viewer' and other tabs do in
the Embedded Image Information Management section.  If I tick the
boxes what actually happens/changes?

It would be really helpful if there was a single option somewhere that
says "write *all* metadata created by Digikam to the image".

I think Digikam can do just about everything I want but it's sometimes
difficult to get it to do it!  :-)

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[Gilles Caulier-4]

Forget Exif and Iptc. In all case, if you use Exiv2 with XMP support,
all digiKam metadata are stored in digiKam namespace and others
standard namespaces.

See my screenshot for details

Gilles Caulier

2010/9/8 Chris G <[hidden email]>:

> On Wed, Sep 08, 2010 at 11:28:45AM +0200, Gilles Caulier wrote:
>> 2010/9/8 Chris G <[hidden email]>:
> [snip]
>> >
>> > Can we not have a way of showing the 'raw' metadata somewhere?  I need
>> > this so that I can write utilities to access (and set) metadata fields
>> > in a way that I can use in digikam.
>>
>> By default Metadata view on RH use user mode to sort exif/iptc/xmp
>> tags. Turn this mode to "full" using button on the top. That all
>>
> I have it set to "full", it still doesn't show the image's Rating, nor
> the Caption or the Tags.  It doesn't show the 'real' names of the
> fields either.
>
> Or maybe I'm getting confused by Digikam not writing the Rating,
> Caption and Tags to the metadata.  I have set to write metadata in
> Metadata/Behaviour in the Configure area but I can't see the Tags,
> Caption or Rating in the metadata (using Digikam or my utilities).
>
> Further, what do the 'EXIF Viewer', 'IPTC Viewer' and other tabs do in
> the Embedded Image Information Management section.  If I tick the
> boxes what actually happens/changes?
>
> It would be really helpful if there was a single option somewhere that
> says "write *all* metadata created by Digikam to the image".
>
> I think Digikam can do just about everything I want but it's sometimes
> difficult to get it to do it!  :-)
>
> --
> Chris Green
> _______________________________________________
> Digikam-users mailing list
> [hidden email]
> https://mail.kde.org/mailman/listinfo/digikam-users
>

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[Gilles Caulier-4]

Forget Exif and Iptc. In all case, if you use Exiv2 with XMP support,
all digiKam metadata are stored in digiKam namespace and others
standard namespaces.

See my screenshot for details: http://www.flickr.com/photos/digikam/4970137661/

Gilles Caulier

2010/9/8 Chris G <[hidden email]>:

> On Wed, Sep 08, 2010 at 11:28:45AM +0200, Gilles Caulier wrote:
>> 2010/9/8 Chris G <[hidden email]>:
> [snip]
>> >
>> > Can we not have a way of showing the 'raw' metadata somewhere?  I need
>> > this so that I can write utilities to access (and set) metadata fields
>> > in a way that I can use in digikam.
>>
>> By default Metadata view on RH use user mode to sort exif/iptc/xmp
>> tags. Turn this mode to "full" using button on the top. That all
>>
> I have it set to "full", it still doesn't show the image's Rating, nor
> the Caption or the Tags.  It doesn't show the 'real' names of the
> fields either.
>
> Or maybe I'm getting confused by Digikam not writing the Rating,
> Caption and Tags to the metadata.  I have set to write metadata in
> Metadata/Behaviour in the Configure area but I can't see the Tags,
> Caption or Rating in the metadata (using Digikam or my utilities).
>
> Further, what do the 'EXIF Viewer', 'IPTC Viewer' and other tabs do in
> the Embedded Image Information Management section.  If I tick the
> boxes what actually happens/changes?
>
> It would be really helpful if there was a single option somewhere that
> says "write *all* metadata created by Digikam to the image".
>
> I think Digikam can do just about everything I want but it's sometimes
> difficult to get it to do it!  :-)
>
> --
> Chris Green
> _______________________________________________
> Digikam-users mailing list
> [hidden email]
> https://mail.kde.org/mailman/listinfo/digikam-users
>

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[Chris Green]

On Wed, Sep 08, 2010 at 12:03:49PM +0200, Gilles Caulier wrote:
> Forget Exif and Iptc. In all case, if you use Exiv2 with XMP support,
> all digiKam metadata are stored in digiKam namespace and others
> standard namespaces.
>
> See my screenshot for details: http://www.flickr.com/photos/digikam/4970137661/
>
All very well but I still need to know exactly what the Exiv2/XMP
field names are so that, having set a value with Digikam, I can read
it with my script and/or access it from Dokuwiki.

Also, are tags, ratings and written this way.

Looking at http://www.flickr.com/photos/digikam/4970137661/ I can see
under "digikam schema" there is a "Tags List" - how do I work out how
to access that with standard Exiv2 tools/libraries.  Similarly for the
Rating in Basic Schema.

Will all these fields be written by default or are only the "digikam
schema" ones written, or what?

Sorry about all the questions, I really appreciate the support here,
thank you.

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[Chris Green]

On Wed, Sep 08, 2010 at 11:27:12AM +0100, Chris G wrote:

> On Wed, Sep 08, 2010 at 12:03:49PM +0200, Gilles Caulier wrote:
> > Forget Exif and Iptc. In all case, if you use Exiv2 with XMP support,
> > all digiKam metadata are stored in digiKam namespace and others
> > standard namespaces.
> >
> > See my screenshot for details: http://www.flickr.com/photos/digikam/4970137661/
> >
> All very well but I still need to know exactly what the Exiv2/XMP
> field names are so that, having set a value with Digikam, I can read
> it with my script and/or access it from Dokuwiki.
>
> Also, are tags, ratings and written this way.
>
> Looking at http://www.flickr.com/photos/digikam/4970137661/ I can see
> under "digikam schema" there is a "Tags List" - how do I work out how
> to access that with standard Exiv2 tools/libraries.  Similarly for the
> Rating in Basic Schema.
>
> Will all these fields be written by default or are only the "digikam
> schema" ones written, or what?
>
> Sorry about all the questions, I really appreciate the support here,
> thank you.
>

... and another issue, I can't find any exiv2 support in PHP.

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[Gilles Caulier-4]

2010/9/8 Chris G <[hidden email]>:

> On Wed, Sep 08, 2010 at 11:27:12AM +0100, Chris G wrote:
>> On Wed, Sep 08, 2010 at 12:03:49PM +0200, Gilles Caulier wrote:
>> > Forget Exif and Iptc. In all case, if you use Exiv2 with XMP support,
>> > all digiKam metadata are stored in digiKam namespace and others
>> > standard namespaces.
>> >
>> > See my screenshot for details: http://www.flickr.com/photos/digikam/4970137661/
>> >
>> All very well but I still need to know exactly what the Exiv2/XMP
>> field names are so that, having set a value with Digikam, I can read
>> it with my script and/or access it from Dokuwiki.
>>
>> Also, are tags, ratings and written this way.
>>
>> Looking at http://www.flickr.com/photos/digikam/4970137661/ I can see
>> under "digikam schema" there is a "Tags List" - how do I work out how
>> to access that with standard Exiv2 tools/libraries.  Similarly for the
>> Rating in Basic Schema.
>>
>> Will all these fields be written by default or are only the "digikam
>> schema" ones written, or what?

Nothing is written to metadata is no options are turned on in setup
metadata config panel. this is the default behavior.

>>
>> Sorry about all the questions, I really appreciate the support here,
>> thank you.
>>
> ... and another issue, I can't find any exiv2 support in PHP.

Exiv2 is a C++ shared library. http://www.exiv2.org

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[Chris Green]

On Wed, Sep 08, 2010 at 12:37:56PM +0200, Gilles Caulier wrote:

> 2010/9/8 Chris G <[hidden email]>:
> > On Wed, Sep 08, 2010 at 11:27:12AM +0100, Chris G wrote:
> >> On Wed, Sep 08, 2010 at 12:03:49PM +0200, Gilles Caulier wrote:
> >> > Forget Exif and Iptc. In all case, if you use Exiv2 with XMP support,
> >> > all digiKam metadata are stored in digiKam namespace and others
> >> > standard namespaces.
> >> >
> >> > See my screenshot for details: http://www.flickr.com/photos/digikam/4970137661/
> >> >
> >> All very well but I still need to know exactly what the Exiv2/XMP
> >> field names are so that, having set a value with Digikam, I can read
> >> it with my script and/or access it from Dokuwiki.
> >>
> >> Also, are tags, ratings and written this way.
> >>
> >> Looking at http://www.flickr.com/photos/digikam/4970137661/ I can see
> >> under "digikam schema" there is a "Tags List" - how do I work out how
> >> to access that with standard Exiv2 tools/libraries.  Similarly for the
> >> Rating in Basic Schema.
> >>
> >> Will all these fields be written by default or are only the "digikam
> >> schema" ones written, or what?
>
> Nothing is written to metadata is no options are turned on in setup
> metadata config panel. this is the default behavior.
>

OK, I'm slowly getting there, there were some write permission
problems as well as my lack of understanding of Digikam.  I'm now
getting Tags, Ratings, Captions written to my image files.  :-)

> >>
> >> Sorry about all the questions, I really appreciate the support here,
> >> thank you.
> >>
> > ... and another issue, I can't find any exiv2 support in PHP.
>
> Exiv2 is a C++ shared library. http://www.exiv2.org
>
Not a lot of use when writing PHP scripts for Web pages.  However I
can access the exif/iptc stuff so I'm fairly OK now.

Once again, thanks for all the help (and for Digikam).

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[Vlado Plaga]

Am Wed, 8 Sep 2010 11:56:10 +0100
schrieb Chris G <[hidden email]>:

> OK, I'm slowly getting there, there were some write permission
> problems [...]

This seems like a good point to mention a bug / suggestion I created in
December 2009:

"digiKam could warn when writing metadata to pictures fails"
https://bugs.kde.org/show_bug.cgi?id=220204

I guess a warning would have saved both of you, Chris and Gilles, some
time.

Regards,
Vlado
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[Chris Green]

On Wed, Sep 08, 2010 at 04:30:04PM +0200, Vlado Plaga wrote:

> Am Wed, 8 Sep 2010 11:56:10 +0100
> schrieb Chris G <[hidden email]>:
>
> > OK, I'm slowly getting there, there were some write permission
> > problems [...]
>
> This seems like a good point to mention a bug / suggestion I created in
> December 2009:
>
> "digiKam could warn when writing metadata to pictures fails"
> https://bugs.kde.org/show_bug.cgi?id=220204
>
> I guess a warning would have saved both of you, Chris and Gilles, some
> time.
>

Yes, it would have helped quite a lot!  :-)

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