NEF/RAW+JPG: how to maintain coherent metadata

[Julien T]

Hello people,

as the following bug is still pending
https://bugs.kde.org/show_bug.cgi?id=126149

is there an easy way to duplicate tag/rating/caption &co between both
files when they have some pre-conditions (same exif creation date,
filename w/o extension, maker model for example) ?

For now, to avoid losing time, I only tag/rate jpg but I want to
duplicate the same on raw/nef.

Thanks a lot
Best regards,

Julien
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[Robert Zeller]

Hello Julien,

I am also shooting both jpg and raw/nef. I am editing tags / geodata and
captions on my jpgs only. After all is done I am using exiv2 to extract
all metadata from the jpgs; command is:

exiv2 ex *.jpg

this creates files with the same basename that the jpgs had, but with
extension .exv ; then I move the *.exv sidecars to the directory where I
store the raw files.
In this directory I use the following command sequence to write the
metadata to the *.nef files:

for F in `ls *.nef` ; do
exiv2 -iixe $F
done

The command : man exiv2 gives you all the options that are useful with
exiv2.

Hope this helps

Robert


On 01/20/2011 01:27 PM, Julien T wrote:

> Hello people,
>
> as the following bug is still pending
> https://bugs.kde.org/show_bug.cgi?id=126149
>
> is there an easy way to duplicate tag/rating/caption &co between both
> files when they have some pre-conditions (same exif creation date,
> filename w/o extension, maker model for example) ?
>
> For now, to avoid losing time, I only tag/rate jpg but I want to
> duplicate the same on raw/nef.
>
> Thanks a lot
> Best regards,
>
> Julien
> _______________________________________________
> Digikam-users mailing list
> [hidden email]
> https://mail.kde.org/mailman/listinfo/digikam-users
>
>  

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[Elle Stone]

Hi Julien,

I'm doing something similar to what Robert is doing. Except I've
decided to keep the raw files in the same directory as the jpegs. I
don't shoot jpegs along with my raw (cr2) files. Rather I use exiftool
to extract the preview image and save as a "sidecar" jpeg for each raw
file.

I use exiftool to write all the metadata from the raw file over to the
extracted sidecar jpeg. In digikam, I only write metadata to the
sidecar jpeg. And after using digikam to tag, write captions, etc for
the sidecar jpegs, I use exiftool to write the tags and captions back
over to the raw files.

Exiftool syntax is a bit complicated sometimes. I'm writing up my
procedure. When I'm finished (hopefully today), if you like I'll post
it for you to consult.

I can't compare exiv2 to exiftool, having never used exiv2.
Undoubtedly either will serve your purposes.

Elle
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[Julien T]

Thanks Robert, Elle,

In fact, I also have all nef+jpg in the same folder.

good script Robert.
two question
- is there a way to ensure there is no nef tagged by errors and no
erasing of user-metadata ?
- why exiv2 -iix*e* ? e is for photo exif metadata. you don't want to
keep the raw ones ?

Elle, if you can publish your process exiftool, I'm sure that I will
not the only one interested.

Thanks a lot

2011/1/20, Elle Stone <[hidden email]>:

> Hi Julien,
>
> I'm doing something similar to what Robert is doing. Except I've
> decided to keep the raw files in the same directory as the jpegs. I
> don't shoot jpegs along with my raw (cr2) files. Rather I use exiftool
> to extract the preview image and save as a "sidecar" jpeg for each raw
> file.
>
> I use exiftool to write all the metadata from the raw file over to the
> extracted sidecar jpeg. In digikam, I only write metadata to the
> sidecar jpeg. And after using digikam to tag, write captions, etc for
> the sidecar jpegs, I use exiftool to write the tags and captions back
> over to the raw files.
>
> Exiftool syntax is a bit complicated sometimes. I'm writing up my
> procedure. When I'm finished (hopefully today), if you like I'll post
> it for you to consult.
>
> I can't compare exiv2 to exiftool, having never used exiv2.
> Undoubtedly either will serve your purposes.
>
> Elle
> _______________________________________________
> Digikam-users mailing list
> [hidden email]
> https://mail.kde.org/mailman/listinfo/digikam-users
>

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[Robert Zeller]

Julien,

please find my comments in your text:

On 01/21/2011 02:51 PM, Julien T wrote:
> Thanks Robert, Elle,
>
> In fact, I also have all nef+jpg in the same folder.
>
> good script Robert.
> two question
> - is there a way to ensure there is no nef tagged by errors and no
> erasing of user-metadata ?
>  
The script works for all *.nef that have a common basename with a *.exv
; e.g. if there is one dscxxx.exv and a dscxxx.nef then the metadata
that were selected by the parameters that follow the -i option will be
replaced in the raw file with those in the .exv file. If you don't want
to replace the data of a particular dscyyy.nef then you have to remove
the related dscyyy.exv before executing the script.
> - why exiv2 -iix*e* ? e is for photo exif metadata. you don't want to
> keep the raw ones ?
>  
It depends upon what you want to replace; if you want to leave the
original exif section untouched, then of course leave the "e" parameter
out. If you want to replace everything you can use the "a" parameter :
exiv2 -ia *.nef will replace all sections with the respective contents
in the *.exv files. I am not quite sure about the comment/caption. Until
recently it was not possible to write a comment to nefs. But I had the
impression that with the newest exiv library this is also possible now
with Nikon raw files.

> Elle, if you can publish your process exiftool, I'm sure that I will
> not the only one interested.
>
> Thanks a lot
>
> 2011/1/20, Elle Stone <[hidden email]>:
>  
>> Hi Julien,
>>
>> I'm doing something similar to what Robert is doing. Except I've
>> decided to keep the raw files in the same directory as the jpegs. I
>> don't shoot jpegs along with my raw (cr2) files. Rather I use exiftool
>> to extract the preview image and save as a "sidecar" jpeg for each raw
>> file.
>>
>> I use exiftool to write all the metadata from the raw file over to the
>> extracted sidecar jpeg. In digikam, I only write metadata to the
>> sidecar jpeg. And after using digikam to tag, write captions, etc for
>> the sidecar jpegs, I use exiftool to write the tags and captions back
>> over to the raw files.
>>
>> Exiftool syntax is a bit complicated sometimes. I'm writing up my
>> procedure. When I'm finished (hopefully today), if you like I'll post
>> it for you to consult.
>>
>> I can't compare exiv2 to exiftool, having never used exiv2.
>> Undoubtedly either will serve your purposes.
>>
>> Elle
>> _______________________________________________
>> Digikam-users mailing list
>> [hidden email]
>> https://mail.kde.org/mailman/listinfo/digikam-users
>>
>>    
> _______________________________________________
> Digikam-users mailing list
> [hidden email]
> https://mail.kde.org/mailman/listinfo/digikam-users
>
>  

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[Elle Stone]

On 1/21/11, Julien T <[hidden email]> wrote:
>
> Elle, if you can publish your process exiftool, I'm sure that I will
> not the only one interested.

Hi Julien,

It took a bit longer than I hoped, but here's a link to my write-up on
working with digikam and exiftool together:

http://ninedegreesbelow.com/2011/imaging/exiftool_digikam/exiftool_digikam.html

Elle Stone
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[Julien T]

Thanks a lot, Elle.
really, a useful compilation of commands.

I also find digikam and exiv2 to be slower than exiftool when handling
exif change.

I still will ask advice about copying tags from jpg to raw, as I
planned to used different folders

exiftool -tagsfromfile %d%f.JPG -TagsList -r -overwrite_original -ext
NEF -o $raw $Images
Images is current directory, raw, the one with NEF file. both file
have the same name.

is it right ?

Thanks a lot
Cheers

Julien
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[Dan McDaniel]

On Mon 24.Jan.11 13:43, Elle Stone wrote:

>On 1/21/11, Julien T <[hidden email]> wrote:
>>
>> Elle, if you can publish your process exiftool, I'm sure that I will
>> not the only one interested.
>
>Hi Julien,
>
>It took a bit longer than I hoped, but here's a link to my write-up on
>working with digikam and exiftool together:
>
>http://ninedegreesbelow.com/2011/imaging/exiftool_digikam/exiftool_digikam.html
>
>Elle Stone

Thanks for that link. Very handy info on using exiftool.

Dan McDaniel
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[Elle Stone]

Hi Julien,

Alas you ask a question I can't answer, that I've been meaning to post
to the exiftool forum (http://u88.n24.queensu.ca/exiftool/forum/ -
they are very helpful), how to read metadata from a file in one folder
and write to a file in another folder.

In your post, is "$raw" shorthand way of indicating the path to your
raw folder, etc? Anyway, I just posted the question to the exiftool
forum.

Elle
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