Exif properties

[Smit Shah]

 Hello, i  am currently working on GSOC project entitled  "Metadata writeback" , where i focus on writing any metadata changes in nepomuk to the file itself if its possible. for images (that too Exif) specific i am using Exiv2 library to write the metadata changes but since there are numerous tags/properties in Exif , i am looking for the once that are likely to be changed as such , since its unlikely that exposure or focus time will ever be changed,

  So i ask can you please list out all the exif properties which are likely to be changed as most exif properties would never be changed hence there is no need to write the metadata changes back to file for those properties as such ?

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[Gilles Caulier-4]

Look in this document :

https://projects.kde.org/projects/extragear/graphics/digikam/repository/revisions/master/raw/project/documents/DBSCHEMA.ODS

Gilles Caulier

2011/6/15 Smit Shah <[hidden email]>

 Hello, i  am currently working on GSOC project entitled  "Metadata writeback" , where i focus on writing any metadata changes in nepomuk to the file itself if its possible. for images (that too Exif) specific i am using Exiv2 library to write the metadata changes but since there are numerous tags/properties in Exif , i am looking for the once that are likely to be changed as such , since its unlikely that exposure or focus time will ever be changed,

  So i ask can you please list out all the exif properties which are likely to be changed as most exif properties would never be changed hence there is no need to write the metadata changes back to file for those properties as such ?

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[Valentin Rusu]

hello,
i think that it would be better to let users change the properties they need. a simple iterative comparison should find out what properies changed then update them. another method would be based on the usage of update hooks when a change in nepomuk attribute should be intercepted then immediately applied to the file.

--
valentin

Smit Shah <[hidden email]> a écrit :

 Hello, i  am currently working on GSOC project entitled  "Metadata writeback" , where i focus on writing any metadata changes in nepomuk to the file itself if its possible. for images (that too Exif) specific i am using Exiv2 library to write the metadata changes but since there are numerous tags/properties in Exif , i am looking for the once that are likely to be changed as such , since its unlikely that exposure or focus time will ever be changed,

  So i ask can you please list out all the exif properties which are likely to be changed as most exif properties would never be changed hence there is no need to write the metadata changes back to file for those properties as such ?

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[Marcel Wiesweg]

>  Hello, i  am currently working on GSOC project entitled  "Metadata
> writeback" , where i focus on writing any metadata changes in nepomuk to
> the file itself if its possible. for images (that too Exif) specific i am
> using Exiv2 library to write the metadata changes but since there are
> numerous tags/properties in Exif , i am looking for the once that are
> likely to be changed as such , since its unlikely that exposure or focus
> time will ever be changed,
>
>   So i ask can you please list out all the exif properties which are likely
> to be changed as most exif properties would never be changed hence there is
> no need to write the metadata changes back to file for those properties as
> such ?

I would recommend to read through libkexiv2. You will see that there are a
selected few methods to write attributes. These methods will typically write
not only to Exif, but IPTC and XMP as well and are good candidates for your
search.
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