Am Dienstag, 14. Oktober 2014, 00:02:42 schrieb Wolfgang Goetz:
> Hello,

Hi.

> raw(=nef) folder, one duplicate:
> --------------------------------
> a.nef
> a.nef.xmp
> a_01.nef.xmp
> 
> ---> sequence number for xmp is clone number.

Yes, that is the definition of the clone number.

> darktable_exported:
> -------------------
> 
> 1) empty folder
> export: select both pictures
> a.jpg      (from a.nef.xmp)
> a_01.jpg   (from a_01.nef.xmp)
> 
> looks like the jpgs are named like the xmps. (only looks like)

Just a coincidence.

> 
> 2) empty folder
> export: select second picture
> a.jpg           (from a_01.nef.xmp)
> 
> export: select first picture
> a_01.jpg  (from a.nef.xmp)
> 
> huh. jpg sequence numbers are independent of input xmp filename.

Yes they are.

> 3) empty folder
> export: select both pictures, check overwrite
> a.jpg (last one wins)
> 
> messed up.

The overwrite thing is buggy and never got my approval.

> ---> sequence number for output is counter to prevent overwrite.

Exactly.

> conclusion/wishes:
> ------------------
> 
> clone number should be named different:  a_c01.nef.xmp
> (export: a_c01_01.jpg, a_c01_02.jpg ...,
> with overwrite: always a_c01.jpg)
> 
> export $(FILE_NAME) should be the xmp (clone)basename, not the nef.

I would propose adding a new variable $(IMAGE_VERSION) or something like that 
which is "" for the original image and the number otherwise. That could even 
be enhanced to a version which is "0" for the original.

> exif info in jpg:
> DerivedFrom (nef), History_operation, History_params, Blendop_params
> ..maybe good to detect changes in picture processing for rebuild. nice.
> 
> ..or to deduce the cloned xmp file used during generation of this picture.
> wish: adding DerivedFromXmp as a direct link to the recipe-file.

There is no such thing as DerivedFromXmp (unless we put it into our dt 
namespace), but I see quite a few problems to determine that as we take 
processing data from the db and not the XMP – those are just backups and can 
be disabled.

> good night
> best regards
> Wolfgang

Tobias

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