1357 Matroska 1-4 EBML Video 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: https://github.com/Matroska-Org/ebml-specification/blob/master/specification.markdown 06 Dec 2002 191 Axiell / Axiell 19 Jul 2013 03 Feb 2022 fmt/569 PUID mkv File extension mk3d File extension mka File extension mks File extension 907 Matroska Video 0x1A45DFA3(EBML-Level 0 element), {0-32}, 0x428288(DocType element), string=matroska, 0x4287(DocTypeVersion element). The specification allows for ASCII text before the EBML header and considers the level 0 EBML header element to be the beginning of the EBML document. For now this signature is offset to 1024 bytes to allow for some ASCII text to precede the header, but to assume the EBML header of a Matroska multimedia format will begin near the beginning of the file and to mitigate against wasteful processing of large files that are not Matroska multimedia. 1 Absolute from BOF 0 1024 Big-endian 1A45DFA3{0-32}4282886D6174726F736B614287 Has priority over 687 MPEG 1/2 Audio Layer 3