die Idee den vlc über das terminal zu starten war schonmal gut
hier mal die Fehlermeldugen
madmax@aspire8930:~$ vlc
VLC media player 3.0.9.2 Vetinari (revision 3.0.9.2-0-gd4c1aefe4d)
[0000562e245e65b0] main libvlc: VLC wird mit dem Standard-Interface ausgeführt. Benutzen Sie 'cvlc', um VLC ohne Interface zu verwenden.
Icon theme "elementary" not found.
[0000562e2468e850] main playlist: playlist is empty
ffmpegthumbnailer -i '/home/madmax/Downloads/996294527674.webm' -o /home/madmax/.cache/thumbnails/normal/e711d7b287044fcef2909c74b55cd750.png -s 128 -f
[matroska,webm @ 0x564bfebcd940] File ended prematurely at pos. 435 (0x1b3)
[matroska,webm @ 0x564bfebcd940] Duplicate element
[matroska,webm @ 0x564bfebcd940] 0x00 at pos 134 (0x86) invalid as first byte of an EBML number
[matroska,webm @ 0x564bfebcd940] Duplicate element
[matroska,webm @ 0x564bfebcd940] Element at 0x3c ending at 0x74dbb8c53abc9 exceeds containing master element ending at 0x13e8
[matroska,webm @ 0x564bfebcd940] Duplicate element
[matroska,webm @ 0x564bfebcd940] Element at 0x4b ending at 0x3a4dbb8c53abd8 exceeds containing master element ending at 0x13f7
[matroska,webm @ 0x564bfebcd940] Element at 0x5a ending at 0x964dbb8c53abe7 exceeds containing master element ending at 0x1406
[matroska,webm @ 0x564bfebcd940] Element at 0x69 ending at 0x4012 exceeds containing master element ending at 0x1415
[matroska,webm @ 0x564bfebcd940] Could not find codec parameters for stream 0 (Video: vp9, none, 1280x720): unspecified pixel format
Consider increasing the value for the 'analyzeduration' and 'probesize' options
Error: decodeVideoFrame() failed: frame not finished
[00007f17d8113860] egl_x11 gl error: cannot select OpenGL API
[00007f17f69606a0] avcodec decoder: Using NVIDIA VDPAU Driver Shared Library 340.108 Wed Dec 11 14:31:24 PST 2019 for hardware decoding
wie müsste ich denn die felenden codecs installieren?