What is MKV?

MKV (Matroska Video) is an open-source multimedia container format developed in 2002. Named after the Russian Matryoshka nesting dolls, MKV can contain unlimited video, audio, picture, and subtitle tracks in one file, making it extremely versatile for complex media projects.

MKV has become the preferred format for high-definition video, particularly for storing movies with multiple language tracks, subtitles, and special features.

Key Features

  • Unlimited Tracks: Multiple video, audio, and subtitle tracks
  • High Quality Support: 4K, 8K, and HDR video
  • Chapter Markers: Navigate long videos easily
  • Menu System: DVD-like menu support
  • Error Recovery: Damaged files can still play
  • Open Source: Free and royalty-free format
  • Extensive Metadata: Rich tagging and information storage
  • Future-Proof: Designed for extensibility

Common Uses

  • High-definition movie storage with multiple audio tracks
  • Anime and foreign films with subtitle options
  • Blu-ray and DVD backups
  • Streaming media with advanced features
  • Professional video archiving
  • Video files with commentary tracks

Advantages

  • Open source and free to use
  • Supports virtually any video/audio codec
  • Multiple audio and subtitle tracks
  • No file size or length limitations
  • Chapter support for easy navigation
  • Better error recovery than other formats

Limitations

  • Limited native device support
  • Not supported by Apple devices without conversion
  • Larger file sizes than highly compressed formats
  • Some players struggle with complex files
  • Not ideal for streaming over limited bandwidth

Technical Information

  • File Extension: .mkv (video), .mka (audio), .mks (subtitles)
  • MIME Type: video/x-matroska
  • Developer: Matroska.org
  • First Release: December 2002
  • Based On: EBML (Extensible Binary Meta Language)
  • Supported Codecs: H.264, H.265, VP9, AV1, and many more
  • License: Open source (BSD-like)