[dolphin] [Bug 501308] New: VLC fails to play media files from an SMB share after restarting Dolphin

[Marie]

https://bugs.kde.org/show_bug.cgi?id=501308

            Bug ID: 501308
           Summary: VLC fails to play media files from an SMB share after
                    restarting Dolphin
    Classification: Applications
           Product: dolphin
           Version: 24.12.3
          Platform: NixOS
                OS: Linux
            Status: REPORTED
          Severity: minor
          Priority: NOR
         Component: general
          Assignee: dolphin-bugs-null at kde.org
          Reporter: me at nycode.dev
                CC: kfm-devel at kde.org
  Target Milestone: ---

SUMMARY
When trying to open media files with VLC from an mDNS-discovered non-public SMB
share with Dolphin and restarting Dolphin once, VLC fails to open the files.
This only happens when you don't save the credentials when asked.
I noticed that VLC receives a kio_fuse path before restarting.
After the restart it receives an smb:// url, which fails since the share
requires credentials.

STEPS TO REPRODUCE
1. Remove saved SMB share from dolphin
2. Close dolphin
3. Delete SMB share credentials in KWalletManager
4. Open Dolphin
5. View the share in the dolphin SMB discovery, login *without* saving the
credentials
6. Try to play a media file with VLC from the share, it receives a kio_fuse
mounted path
7. Restart dolphin
8. Try to play a media file again, it receives an smb:// url and fails to play
it

OBSERVED RESULT
VLC receives a smb:// url

EXPECTED RESULT
VLC should receive a kio_fuse path

SOFTWARE/OS VERSIONS
Operating System: NixOS 25.05
KDE Plasma Version: 6.3.2
KDE Frameworks Version: 6.11.0
Qt Version: 6.8.2
Kernel Version: 6.13.6 (64-bit)
Graphics Platform: Wayland
Processors: 32 × AMD Ryzen 9 7950X3D 16-Core Processor
Memory: 62.4 GiB of RAM
Graphics Processor: AMD Radeon RX 7900 XT

ADDITIONAL INFORMATION
I think there's something wrong with the special handling of VLC,
maybe Dolphin thinks after a restart that the share is now a public one, since
the credentials were not saved?
I was not able to reproduce it when I clicked that credentials should be saved.
Also only reproducible when using the SMB network discovery.

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