MKVToolnix

MKVToolnix is a set of tools to create, alter and inspect Matroska files under Linux, other Unices and Windows. They do for Matroska what the OGMtools do for the OGM format and then some.

With these tools one can get information about (mkvinfo) Matroska files, extract tracks/data from (mkvextract) Matroska files and create (mkvmerge) Matroska files from other media files. Matroska is a new multimedia file format aiming to become THE new container format for the future.

• Release Date: Aug 31, 2021
• Download(s):
  mkvtoolnix-32-bit-61.0.0-setup.exe
  mkvtoolnix-32-bit-61.0.0.7z
  mkvtoolnix-64-bit-61.0.0-setup.exe
  mkvtoolnix-64-bit-61.0.0.7z
  MKVToolNix-61.0.0.dmg
  MKVToolNix_GUI-61.0.0-x86_64.AppImage
• # Version 61.0.0 "So" 2021-08-30
  
  
  ## New features and enhancements
  
  
  * all: IETF BCP 47/RFC 5646 language tags: implemented support for officially
    registered IANA language tag extensions.
  * mkvmerge: track selection: when using language tags for selecting which
    tracks to keep, mkvmerge will now use component-based language tag matching
    instead of comparing them verbatim. This means that only those components
    (language, region etc.) the user specified will be required to exist and be
    equal. For example, if a file contains three subtitle tracks with languages
    `es` (generic Spanish), `es-MX` (Spanish as spoken in Mexico) and `es-ES`
    (Spanish as spoken in Spain), the user can use `--stracks es` to match all
    three tracks or be more specific with e.g. `--stracks es-MX` which would
    only match one track. Similarly inverting the selection with e.g. `--stracks
    !es` would get rid of all three tracks, not just the one for the generic
    Spanish.
  * MKVToolNix GUI: multiplexer: deriving track languages from file names: the
    GUI can now detect full BCP 47/RFC 5646 language tags in file names. Part of
    the implementation of #3173.
  * MKVToolNix GUI: multiplexer: deriving track languages from file names: the
    default list of boundary characters now includes `-`. Part of the
    implementation of #3173.
  * MKVToolNix GUI: multiplexer: the GUI now defaults to the "lower" process
    priority setting for new installations in order to leave more room for other
    applications, especially interactive ones. Up to and including v59 the
    default was the "normal" process priority. v60 changed that to "lowest",
    which turned out to be much slower on Windows for no real gain over
    "lower". The setting will be auto-corrected by the GUI if the settings file
    were saved last with a version between v60.0.0.0 & v60.0.0.17 & "lowest" &
    it is still set to "lowest".
  * HEVC dumper development tool: the tool has been renamed to `xvc_dump` and
    extended to be able to dump AVC/H.264 bitstreams, too. It now also detects
    the type of bitstream framing (ISO 14496-15 vs. ITU-T H.264/H.265 Annex B).
  
  
  ## Bug fixes
  
  
  * all: IETF BCP 47/RFC 5646 language tags: fixed a corner case of wrongfully
    allowing scripts/variants not listed in any of the entries in the prefix
    list when the prefix list contains prefixes restricting scripts/variants and
    a prefix solely with the language at the same time (example: the variant
    `ekavsk` with its prefixes `sr`, `sr-Cyrl` and `sr-Latn` where
    e.g. `sr-ekavsk` and `sr-Cyrl-ekavsk` should be allowed but not
    `sr-Bali-ekavsk`).
  * mkvmerge: HEVC/H.265: the frame type of B frames was often wrongfully
    signalled as P frames instead, both with `BlockGroup` (missing second
    references) and `SimpleBlock` ("discardable" flag not set) elements.
  * mkvmerge: SSA/ASS packetizer: the frame numbers will now be re-calculated
    when appending SSA/ASS tracks so that frame numbers of appended tracks are
    always strictly higher than frame numbers of the track they're appended to.
  * mkvmerge, MKVToolNix GUI's chapter editor: BCP 47/RFC 5646 language tags:
    when BCP 47 language tags are used with a language code that isn't part of
    ISO 639-2, the programs will now write a legacy language element set to
    `und` ("undetermined") instead of not writing such an element at all or
    writing one with an invalid code. Fixes #3174.
  * mkvmerge, MKVToolNix GUI's chapter editor: BCP 47/RFC 5646 language tags:
    the programs will ensure that the legacy and IETF language elements written
    will be unique within the scope of the same "chapter display" element.
  * mkvinfo, MKVToolNix GUI's info tool: in summary mode the frame type was
    reported wrong for `BlockGroup` elements in which the `ReferenceBlock`
    elements were located behind the `Block` element.
  
  
  ## Build system changes
  
  
  * all: `std::codecvt_utf8` is now used instead of Boost's
    `utf8_codecvt_facet`. The bundled copy the latter in `lib/boost` has
    therefore been removed.