MKVToolNix is a set of tools to create, alter and inspect Matroska files under Linux, other Unices and Windows.https://mkvtoolnix.download/index.html
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# Version 71.1.0 "Fortitude" 2022-10-09 ## Bug fixes * Chapters DTD: added the new edition & chapter elements from Matroska v5. * Chapters DTD: fixed EditionUID being mandatory. mkvmerge can auto-generate it if it's missing from the XML file. * Chapters DTD: fixed the `example-chapters-1.xml` not validating against the DTD. * Chapters DTD: corrected the old name `EditionManaged` to `EditionFlagOrdered`. * Chapters DTD: fixed `ChapLanguageIETF` missing its element declaration & `ChapterLanguage` being required. * XML DTDs: fixed elements representing binary data not allowing the `format` attribute. ## Build system changes * bug fix: configure accidentally tested for libEBML ≥ 2.0.0 & libMatroska ≥ 2.0.0, even though the actual requirements are 1.4.4 & 1.7.1 respectively.