Overview: Matroska features
Matroska attachments and ordered chapters add supporting assets and navigation relationships beyond ordinary media tracks.
Some Matroska files carry resources alongside their tracks or describe a playback order through chapters. Those features can affect subtitle appearance and how segments are presented, even when the principal video and audio codecs are unchanged. The pages below explain the stored feature and the reader support it requires.
Matroska attachments
Matroska attachments embed supporting files such as fonts and cover images alongside the timed media tracks.Matroska ordered chapters
Matroska ordered chapters define a presentation sequence that can reuse or rearrange ranges from one or more segments.