vlc and smplayer wont play mkv video track

is anyone else having an issue with mkvs not playing right, both vlc and smplayer are playing the audio tracks fine but wont display video, vlc says “no suitable decoder module:” but smplayer doesn’t seem to display an error about it

after a bit more stuffing around it seems it only effects certan groups of files

Can you also check what video codec this is that causes the problem ?
MKV is only a container which can use numerous of audio & video codecs.

uncheck /Smplayer/Options/Preferences/Interface/Hide video window when playing audio files