Missing thumbnails

[Milind Joshi]

Still waiting for an update on this. Desperately need a solution ASAP.

On 12.10.2023 04:44:26 pm, Milind Joshi wrote:
> Hi Gilles
>
> I have about 4,000 images in my collections. They consist of dng, pef, 
> arw, tif and jpg formats. These files are in different collections, 
> one for each format. The collections are on an external drive. The 
> problem affects all these collections. However, some thumbnails (about 
> 10% ) in all these collections are displayed correctly. Rest are missing.
>
>  It's a one TB drive with more than 500 GB free. So disk space is not 
> a problem.
>
> Are the thumbnails stored in thumbnails-digikam.db? Will deleting this 
> and the thumbnails-digikam.db-journal file create the thumbnails all 
> over again. Interestingly, the time stamp  on both the files is 
> yesterday indicating that all the refresh operations I have done today 
> have had no effect.
>
> Do update on the next course of action.
>
> mj
>
> On 12.10.2023 02:53:01 pm, Gilles Caulier wrote:
>> Hi,
>>
>> Which kind of image format is affected with the thumbnails lost ?
>>
>> Thumbnails are stored in a dedicated sqlite database and compressed in
>> Wavelets format (PGF). Did you have enough space on the disk where the
>> database is stored ?
>>
>> How many items do you have in your collections ?
>>
>> Best
>>
>> Gilles Caulier
>>
>> Le jeu. 12 oct. 2023 à 10:32, Milind Joshi <mmjoshi at iitbombay.org> a 
>> écrit :
>>> I have been using digiKam for a number of years. Being an open source
>>> fan digiKam along with RawTherapee and Gimp are my tools to manage my
>>> photography workflow.
>>>
>>> Couple of days back, I noticed thumbnails missing from some of my
>>> collections. Rather than figuring out why it happened, I tried to
>>> refresh the collection thinking that the thumbnails will be generated
>>> again. digiKam progress display in the bottom right does show that the
>>> Thumbs are being generated. However, the progress indicator stays stuck
>>> at 0% forever. Thinking that the database could have been corrupted, I
>>> used the Maintenance tool to clean the thumbnail database. This was 
>>> done
>>> successfully. However, when I tried to refresh my collection to 
>>> generate
>>> the thumbnails the same problem of the progress bar for thumbs
>>> generation staying at 0% is repeated.
>>>
>>> What could be the problem? More importantly how to I recover from it.
>>> It's impossible to manage the workflow without seeing the thumbnails.
>>>
>>> I am on Windows 11 and have digiKam 8.1.0 on my laptop.
>>>
>>> Need solution for this urgently!
>>>
>>> mj
>>>