: Ensure the file extension is actually .mkv . If it ends in something like .exe , do not open it , as it may be malware disguised as a movie.
: The "tag" or the website/source where the file originated. : Ensure the file extension is actually
: This often happens if the audio is in a format like DTS or AC3 that your player doesn't support. Updating to the latest version of VLC usually fixes this. do not open it