The VideoLAN Forums

Sorry I don't know any technical terms, I just like VLC for video playback. How would I check what kind of mkv the file is and how could I tell which codecs I'm using? The chapters (or at least that is what I think they are called) have little tick marks under the bar showing time in the video.

I am currently using Windows 8.1 and VLC version 2.2.1. I recently downloaded a show in .mkv format but have noticed that the audio will cut out as soon as a new chapter in the video starts (OP, Main, ED). Any idea what is causing this or how I could fix it?