About MKVToolnix
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MKVToolNix: Your Swiss Army Knife for Matroska Media Manipulation
Ever felt frustrated with limited video editing options or incompatible file formats? If you work with Matroska (MKV) files, look no further than MKVToolNix, a free and open-source software suite that empowers you to create, edit, and inspect these versatile multimedia containers.
What is MKVToolNix?
Developed by Moritz Bunkus, MKVToolNix is a collection of command-line tools specifically designed for manipulating MKV files.
Function
Create MKV files: Combine video, audio, subtitle, and chapter tracks from various sources into a single MKV file, preserving their original quality.
Edit MKV files: Add, remove, or reorder existing tracks within an MKV file. Extract specific tracks (like audio or subtitles) to use them independently.
Inspect MKV files: Gain detailed information about the contents of an MKV file, including codec information, track properties, and embedded metadata.
Demuxing and muxing: Demux an MKV file to separate its constituent tracks, or mux them back together into a new MKV file with your desired configuration.
Multiplexing: Merge multiple MKV files into a single container, preserving individual tracks or merging them for combined playback.
Getting started with MKVToolNix
Official website: The MKVToolNix website offers comprehensive documentation, tutorials, and user forums for assistance.
GUI alternatives: Consider third-party graphical user interfaces (GUIs) like MKVToolNix GUI or mkvmerge GUI for a more user-friendly experience.
New features and enhancements
* mkvmerge: Matroska reader: the "video alpha mode" track header property will
be copied to the output file if present. Part of the implementation of
#3643.
* mkvmerge: Matroska reader: the "video alpha mode" track header property will
be reported in JSON identification mode as the track property
`alpha_mode`. Part of the implementation of #3643.
* mkvmerge: Matroska reader: the file's timestamp scaling factor will be
reported in JSON identification mode as the container property
`timestamp_scale`.
* mkvmerge: MPEG transport stream reader: teletext subtitles intended for
hearing impaired people (type 0x05) are now marked as such via the
appropriate flag in the track headers.
* mkvmerge: file identification: the JSON identification output schema version
has been bumped to 19.
* mkvmerge: added a new hack `always_write_block_add_ids` that can be used as
a workaround for players that don't support the handling of missing "Block
Addition ID" sub-elements of "Block More" elements in block additions
properly. These are used for e.g. alpha channel data in VP9 with a "Block
Addition ID" value of 1, which is also its default value. Workaround for the
player issues listed in #3643.
* mkvinfo: added support for the "video alpha mode" track header element. Part
of the implementation of #3643.
* mkvpropedit, MKVToolNix GUI's header editor: added support for the "video
alpha mode" track header property. In `mkvpropedit` it's called
`alpha-mode`. Part of the implementation of #3643.
* MKVToolNix GUI: multiplexer: when adding files the GUI can automatically
enable the "hearing impaired" flag for audio and subtitle tracks if the file
name contains the word "cc" or "sdh" delimited by certain characters
(configurable). This feature is turned on by default. Implements #3648.
* MKVToolNix GUI: multiplexer: when scanning for Blu-ray playlists the GUI
will now ignore playlists that are likely meant for menus. Currently the GUI
considers this to be the case when a playlist contains the same item at
least five times.