the same packages are installed also on my computer.
But when I open an MP4 file with vlc, vlc “plays” the video by showing just a black screen. When starting vlc in a command line, I get:
vlc
VLC media player 3.0.23 Vetinari (revision 3.0.23)
[000055abb74396a0] main libvlc: VLC wird mit dem Standard-Interface ausgeführt. Benutzen Sie 'cvlc', um VLC ohne Interface zu verwenden.
[000055abb74c8710] main playlist: playlist is empty
[00007fb018011210] gl gl: Initialized libplacebo v5.264.1 (API v264)
[00007fb01cc15b10] main decoder error: buffer deadlock prevented