On Wed, Dec 3, 2014 at 1:42 PM, Steven Fosdick <[email protected]>
wrote:
> On 29 November 2014 at 15:06, johannes hanika <[email protected]> wrote:
>
>> your data is in xmp as a backup and to allow transferring it along with
>> the file easily. the database is our primary source of data, and used for
>> fast access (the collect module allows you to do fancy things based on
>> metadata, which would be atrociously slow if we would need to open all the
>> xmp for this).
>>
>> you can sync the xmp data on startup with a crawler thread (which you can
>> enable in your preferences), in case you're doing crazy things to your xmp
>> outside dt (load with other application, use sed, etc).
>>
>
> If so this make it a better idea to change the database? Will darktable
> rewrite the XMP files from the database? It would be very simple to change
> metadata across a large number of files with SQL.
>
yes, that would work. you might want to collect `film roll %', press ctrl-a
and write xmp in the right panel after that operation, to be sure the xmp
is written. xmp are only synced if data is changed inside dt (which is
pretty much all the time you work with a picture, star ratings, tags,
colour labels, enter/exit darkroom mode even without changes..).
-jo
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