: 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.
: The "Matroska" container format. It is popular because it can hold multiple audio tracks, subtitle tracks, and chapters in a single file. 2. Recommended Media Players
: 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.
: If the 1080p BluRay file is stuttering, try enabling "Hardware Acceleration" in your player's settings (Tools →right arrow Preferences →right arrow Input/Codecs in VLC).
: The "tag" or the website/source where the file originated.
: If no subtitles are inside the file, you can download an .srt file from sites like Subscene and simply drag-and-drop the file onto the player while the movie is running. 5. Troubleshooting Common Issues