Hello Edmondo,

thank you for your comment.

Now, I get this:

mpv -hwdec /data/Filme/test.mkv
Playing: /data/Filme/test.mkv
 (+) Video --vid=1 (*) 'OceanWorld.2D.2009.BluRay.1080p.AC3.x264-CHD' (h264
1920x1080 24.000fps)
 (+) Audio --aid=1 --alang=eng (*) 'AC3 5.1 channels, 640kbps' (ac3 6ch
48000Hz)
File tags:
 Title: 深海探奇 2D
ATTENTION: default value of option mesa_glthread overridden by environment.
ATTENTION: option value of option mesa_glthread ignored.
ATTENTION: default value of option mesa_glthread overridden by environment.
ATTENTION: option value of option mesa_glthread ignored.
mesa: for the   --simplifycfg-sink-common option: may only occur zero or one
times!
mesa: for the   --global-isel-abort option: may only occur zero or one times!
mpv: ../src/gallium/state_trackers/vdpau/vdpau_private.h:138:
FormatYCBCRToPipe: Assertion `0' failed.
Abbruch (core dumped)