How to get media information in Dolphin?

I can select media information entries to display in details view, but the listed columns are empty.

Width, height, duration, or any other information for pictures, sound-files or videos can't be displayed.

How can I get the correct media informations in dolphin?

System information:

Dolphin 21.12.3

Operating System: Ubuntu Studio 22.04
KDE Plasma Version: 5.24.7
KDE Frameworks Version: 5.92.0
Qt Version: 5.15.3
Kernel Version: 5.15.0-70-lowlatency (64-bit)
Graphics Platform: X11
Processors: 16 × 13th Gen Intel® Core™ i7-13700K
Memory: 62.6 GiB of RAM
Graphics Processor: NVIDIA GeForce RTX 3060/PCIe/SSE2

Additional Informations:

• File Search has been disabled in system settings, no index exists. (I've tried with it enabled and full index too ...)
• "kid3" is installed.
• It does not make any difference, wether its on a NTFS, ext4, FAT32, smb or any other file system.

Dolphin shows:

A view to the information panel on the right side shows the correct data. So the information is available for dolphin.

Just to clarify the question, wether indexing has to be enabled, or not:

With indexing enabled (including content):

On my system, Dolphin does NOT show Width and Duration in its columns, but still in the preview. The display according to the first picture above has not been changed.

The pictures show also, that the path for the displayed movies and images are within the indexed path.

There must be some other settings or configurations, to get it working, but out-of-the-box it does not work on Ubundu Studio 22.04 LTS.

One solution contains the following steps:

1. Add *.pdf to /home/sd/.config/baloofilerc

   [Basic Settings] Indexing-Enabled=true

   [General] dbVersion=2 exclude filters=~,.part,*.pdf,...

2. Stop indexing and wait ... After some time (could be hours) a dialog opens, to remove the index -> Remove it!

3. Open a terminal and use balooctl purge. (Don't use sudo!)

4. Open the settings panel and activate indexing again. Make sure, only the paths are activated, where you realy want an index, before you apply it.

The reason to add *.pdf to the exclusion list: I observed, that everytime, the index was on a PDF file, it took a very long time to go further, up to 10 minutes, depending on its complexity. PDFs could be in media folders, containing descriptions for movies, movie books, artist descriptions, scores and even picture albums. After a full index, the media info for other file types was still not available, but after excluding PDFs from the index, doing the above steps, everything was fine.

The result:

It took again several hours, to rebuild the new index, but now I'm happy :)

You need file search enabled in the system settings and also index file content. Add the folder you want to be indexed with the Add folder configuration...-button to the list. The indexing is recursive, means also files in subfolders of the added folder will be indexed. Dolphin will be able to display the metadata in that columns only for files in indexed folders.