MKVToolNix v50.0.0 Final x86/x64 多语言中文正式版-MKV封装工具

MKV 是一种优秀的多媒体容器格式，它可把多种不同编码的视频及16条或以上不同格式的音频和语言不同的字幕封装到一个 MKV 文件中，而 MKVToolNix 是一款免费开源的 MKV 编辑器和工具集，能够合成、编辑 Matroska MKV 文件。

MKVToolNix 包含了以下几个 MKV 专用处理工具：
*mkvmerge：将多媒体文件封装、合并、混流为 MKV 文件；
*mkvinfo：输出 MKV 文件组件和编码信息；
*mkvextract：从 MKV 文件中提取视频、音频和字幕轨道；
*mkvpropedit：直接修改现有 MKV 文件的属性而无需重混流；
*mmg：mkvmerge GUI，并包含了章节编辑器和头部编辑器。

MKVToolNix 中的 Mkvmerge GUI 允许你导入多个视频、音频、字幕轨道，混流合并一个新的 MKV 文件，并可以设置导出视频的宽高比、显示比例、帧频等等。

MKVToolNix 中的 MKVExtractGUI 则可以从现有的 MKV 文件中提取其中的一个或多个视频、音频或者字幕信息，是专业的 MKV 分离工具。

MKVToolNix 是专用的 MKV 剪辑工具，提供了4种 MKV 切割模式，包括按尺寸、按时长、按特定时间码和按分段，都是无损剪辑、分割 MKV 过程，能够同步切割视频、音频和字幕轨道。比之前介绍的所有支持 MKV 分割的工具都要好用，包括 Boilsoft Video Splitter、SolveigMM AVI Trimmer 等。

更新记录：

# Version 50.0.0 "Awakenings" 2020-09-06

## New feature: IETF BCP 47 language tags

* I've written up a [nice FAQ
  entry](https://gitlab.com/mbunkus/mkvtoolnix/-/wikis/Languages-in-Matroska-and-MKVToolNix)
  about the switch to using IETF BCP 47 language tags, how they interact with
  legacy language elements, how the programs actually behave and how to
  disable their use if necessary.
* mkvmerge: IETF BCP 47/RFC 5646 language tags: mkvmerge will now accept full
  BCP 47 language tags for all options taking a language. mkvmerge will always
  write "LanguageIETF" track header elements. If the language tag contains a
  valid ISO 639-2 language code it will also set the legacy "Language" track
  header element to the included ISO 639-2 code. Part of the implementation of
  #2419.
* mkvmerge: IETF BCP 47/RFC 5646 language tags: if present the "LanguageIETF"
  track header element will be reported as the `language_ietf` property in
  JSON identification mode. Part of the implementation of #2419.
* mkvmerge: IETF BCP 47/RFC 5646 language tags in chapters: mkvmerge will now
  write "ChapLanguageIETF" elements when creating chapter atoms, either when
  reading the simple chapter format or when generating chapters due to the
  `--generate-chapters` command line option. Part of the implementation of
  #2419.
* mkvmerge: IETF BCP 47/RFC 5646 language tags in tags: mkvmerge will now
  write "TagLanguageIETF" elements when creating "simple tag" elements, either
  when reading tag XML files or when generating them. Part of the
  implementation of #2419.
* mkvmerge: IETF BCP 47/RFC 5646 language tags: added an option
  `--disable-language-ietf` that causes mkvmerge to only write the legacy
  language elements.
* mkvmerge, mkvpropedit, MKVToolNix GUI's chapter editor: IETF BCP 47/RFC 5646
  language tags in chapters: when reading XML chapter files the programs will
  now add "ChapLanguageIETF" elements for atoms that don't contain them. The
  values are derived from existing "ChapterLanguage" elements. Part of the
  implementation of #2419.
* mkvpropedit: IETF BCP 47/RFC 5646 language tags: setting/deleting the track
  language now acts on both the old language element as well as the
  "LanguageIETF" track header element. Part of the implementation of #2419.
* mkvpropedit: IETF BCP 47/RFC 5646 language tags: added an option
  `--disable-language-ietf` that causes mkvpropedit to apply changes to the
  `language` track header property only to the legacy language track header
  element.
* mkvinfo: IETF BCP 47/RFC 5646 language tags: added support for the
  "LanguageIETF" track header element. Part of the implementation of #2419.
* MKVToolNix GUI: multiplexer: added full support for IETF BCP 47/RFC 5646
  language tags for both track and chapter languages. Part of the
  implementation of #2419.
* MKVToolNix GUI: chapter: added full support for IETF BCP 47/RFC 5646
  language tags for chapter languages. Part of the implementation of #2419.
* MKVToolNix GUI: header editor: added full support for IETF BCP 47/RFC 5646
  language tags for track header languages. The header editor allows editing
  of the legacy language elements and the IETF BCP 47 language elements
  independent of each other. Part of the implementation of #2419.

## Other new features and enhancements

* mkvmerge: the chapter generation mode `when-appending` now also works with
  the splitting modes `parts:` & `parts-frames:` when using the `…,+…` syntax
  for appending other sections of the source file to the same destination
  file. Implements #2898.
* MKVToolNix GUI: multiplexer: the file selection dialogs now include the
  extension `.dtsma` for DTS files. Implements #2901.
* mkvmerge: MP4 reader: sped up parsing MP4 DASH files with a lot of segments
  (`trun` atoms) quite a bit. Part of the fix of #2900.
* The PCRE2 regular expression library is now used instead of `std::regex` for
  big performance improvements in all places where regular expressions are
  used for parsing big chunks of text, e.g. in the subtitle parsers. Part of
  the fix of #2899.
* all programs: Windows: all programs now support long file names on Windows
  10 release 1604 if they're turned on in the registry. Implements #2916.

## Bug fixes

* MKVToolNix GUI: preferences: under certain conditions changing the selected
  entry in the page tree on the left did not cause the page shown on the right
  to be updated. Fixes #2895.
* mkvmerge: splitting text by a fixed string (e.g. `,`) is now done by using
  `std::string.find()` instead of using a regular-expression-based text
  splitting function, greatly improving its performance. Part of the fix of
  #2899.
* mkvmerge: mkvmerge will now read-buffer file I/O when probing text file
  formats which increases its speed significantly on Windows. Part of the fix
  of #2899.
* mkvmerge: MP4 reader: fixed handling of `tkhd` atoms of version 1. Fixes
  #2900.

## Build system changes

* The PCRE2 library (the 8-bit variant) is now required.

官网地址：https://mkvtoolnix.download

官网更新记录： https://mkvtoolnix.download/doc/NEWS.md

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