Cilus
laborare est orare
The problem is most probably for codec. And you are using core avc Codec, then install Halli Media Splitter.
Download MediaInfoGUI.
Open it and drag your video inside its window. It will show you the details of the Audio and video stream. As it is a mkv file, probably it will be H264 or AVC video codec and AAC audio codec.
If its, then try to play it in vlc media player (download the latest one). VLC has inbuit codec for playing avc. If it is playing properly in VLC, then the problem is surely codec related. Try to uninstall codecs (coreavc) and reinstall it. Also download the latest ffdshow codec.
Download MediaInfoGUI.
Open it and drag your video inside its window. It will show you the details of the Audio and video stream. As it is a mkv file, probably it will be H264 or AVC video codec and AAC audio codec.
If its, then try to play it in vlc media player (download the latest one). VLC has inbuit codec for playing avc. If it is playing properly in VLC, then the problem is surely codec related. Try to uninstall codecs (coreavc) and reinstall it. Also download the latest ffdshow codec.