[phonon-backend-vlc] [Bug 459925] New: VLC showing black screen instead video but Kaffeine plays without problems

[empyreal]

https://bugs.kde.org/show_bug.cgi?id=459925

            Bug ID: 459925
           Summary: VLC showing black screen instead video but Kaffeine
                    plays without problems
    Classification: Frameworks and Libraries
           Product: phonon-backend-vlc
           Version: unspecified
          Platform: Kubuntu
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: unassigned-bugs at kde.org
          Reporter: empyreal at ukr.net
                CC: bcooksley at kde.org, fabo at kde.org, jb at videolan.org,
                    myriam at kde.org, sitter at kde.org
  Target Milestone: ---

Fresh Kubuntu 22.10 install. When Nouveau driver for NVIDIA graphics card was
used, there were no problems with video playback for some time (at least one
week everything worked ok), but then VLC black screen happened - no video, but
audio only. I didn't figure out cause of this.

Made another fresh Kubuntu 22.10 install, NVIDIA 515 driver install and got
black screen instead video immediately (no video - only audio sound), but
Kaffeine plays videos without problems – both audio and video tracks.

I figured out that problem is mainly with Xvid MPEG-4 Video (XVID), H264 -
MPEG-4 AVC (part 10) (avc1) and DivX MPEG-4 Video (DX50) videos. VLC - default
settings. Tried to change acceleration, etc, but no positive result.

Partial solution: When I uncheck Embedded video in VLC Video settings, I get
two VLC windows – first is VLC itself and second is video, which is played
normally. It spoils usability but  at least I can watch videos in VLC now. What
kind of issues is this? KDE or VLC?

SOFTWARE/OS VERSIONS
Operating System: Kubuntu 22.10
KDE Plasma Version: 5.25.5
KDE Frameworks Version: 5.98.0
Qt Version: 5.15.6
Kernel Version: 5.19.0-15-generic (64-bit)
Graphics Platform: X11

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