Missing thumbnails

[Milind Joshi]

Hi Gilles

Thanks. That worked.

Now I am facing another problem. I have jpg files without any tags in 
two selection. Each of these selections have multiple directories under 
them. None of the jpg files here have any tags. That is confirmed when I 
go the individual directories and check the files. However, when I 
search these collections for jpg files with tags, all the files show up! 
Again individually or collectively no tags are displayed in Captions tab 
on the right sidebar.

Do let me know if running the DebugView tool here will be helpful and I 
can do that. Also, where do I send the result of the DebugView tool?

mj

On 14.10.2023 12:21:34 pm, Gilles Caulier wrote:
> yes, all thumbnails are stored in the database, a dedicated sqlite
> file as explained here:
>
> https://docs.digikam.org/fr/setup_application/database_settings.html#the-sqlite-database
>
> Removing this file will be recreated from scratch at next startup, and
> using the maintenance tool.
>
> Note that a console trace can be informative to catch error from
> database while generating thumbs with current one. See details here :
>
> Gilles Caulier
>
>
> Le sam. 14 oct. 2023 à 08:47, Milind Joshi <mmjoshi at iitbombay.org> a écrit :
>> 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
>>>>>