The National Archives
Search our website
  • Search our website
  • Search our records
Image of software box and CD PRONOM
Welcome (PRONOM  home page) About PRONOM Add an entry
Search Help - opens in a new window Information resources - opens in a new window

*Details: File format summary



Search by keyword Search by file format Search by PUID Search by software Search by vendor Search by lifecycles Search by Migration Pathway

Details for:

Save as... XML | CSV Printer friendly version


Name Matroska
Version 1-4
Other names  
Identifiers PUID:  fmt/569
Family EBML
Classification Video
Description The Matroska Multimedia Container is an open standard free container format, based on the Extensible Binary Meta Language (EBML). Matroska file extensions are .MKV for video (with subtitles and audio), .MK3D for stereoscopic video, .MKA for audio-only files, and .MKS for subtitles only. The Internet Engineering Task Force (IETF) Working Group: Codec Encoding for LossLess Archiving and Realtime transmission (cellar) is tasked with the standardisation of Matroska. The EBML specifications are work-in-progress, and can be found here:
Byte order  
Related file formats Has priority over MPEG 1/2 Audio Layer 3  
Technical Environment  
Released 06 Dec 2002
Supported until  
Format Risk  
Developed by None.
Supported by None.
Source Axiell / Axiell
Source date 19 Jul 2013
Source description  
Last updated 03 Feb 2022
Note Format specification:
Top of page Top of page
The National Archives Newsletter Icon

Send me The National Archives’ newsletter

A monthly round-up of news, blogs, offers and events.