[Digikam-users] RAW file preview using embedded JPEG ?

[Gilles Caulier]

Can you share with me a set of CR2 files to test here ?

Note :

- Yes there is a cache mechanism. The problem is not here.

- Raw preview extraction are managed by Exiv2 in first or Libraw,
depending of image size extracted. If Exiv2 return a smaller image
than screen size, Libraw is tried.

Code relevant of preview extraction from file is here :

https://projects.kde.org/projects/extragear/graphics/digikam/repository/revisions/master/entry/libs/threadimageio/previewtask.cpp#L204

Gilles Caulier

2014-10-13 18:50 GMT+02:00 Vincent Tassy <photo at tassy.net>:
> Hi Gilles,
>
> I was very happy with your answer. I tried it on my work computer where I
> have an old digikam 3.5 and it worked like a charm.
>
> Now back at home, where I run Digikam 4.3 on a Fedora 20, there is a problem
> :/
> Check out the following screenshots. The checkbox in the settings is
> un-ticked but the Raw preview still shows "Half size raw preview" ! (I've
> tried closing/relaunching digikam)
>
> https://drive.google.com/file/d/0B1A_V-o8tk0qdWRlSUVLR1NHaE0/view?usp=sharing
> https://drive.google.com/file/d/0B1A_V-o8tk0qOVpqVkNvdVZLMjA/view?usp=sharing
>
> What's even more strange is that when I browse my image collection, some CR2
> files preview with the Embedded JPEG, some keep showing the Half Size RAW
> preview ! I don't understand the logic ...
>
> Is there maybe a cache of those preview images ?
> Any other idea ?
>
> Thanks,
>
> Vince.
>
> On 10/13/2014 11:26 AM, Gilles Caulier wrote:
>>
>> digiKAm will show Raw JPEG preview if you switch right PReview Option
>> in digiKam/Setup/Album section...
>>
>> Gilles Caulier
>
>
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