mkvmerge

creates Matroska files

TLDR

Merge files

$ mkvmerge -o [output.mkv] [input1.mp4] [input2.mp4]

Add subtitles

$ mkvmerge -o [output.mkv] [video.mkv] [subtitles.srt]

Extract tracks

$ mkvmerge -o [output.mkv] --audio-tracks [1] [input.mkv]

Set default track flag

$ mkvmerge -o [output.mkv] --default-track-flag [0:1] [input.mkv]

Split by size

$ mkvmerge -o [output.mkv] --split [700M] [input.mkv]

Set track language

$ mkvmerge -o [output.mkv] --language [0:eng] [input.mkv]

Add title

$ mkvmerge -o [output.mkv] --title "[Movie Title]" [input.mkv]

Identify tracks in a file

$ mkvmerge -i [input.mkv]

SYNOPSIS

mkvmerge [options] -o output inputs

mkvmerge creates Matroska (MKV/MKA/MKS) container files by merging video, audio, and subtitle streams from various source formats. It does not transcode; it only remuxes streams into the Matroska container.The tool is part of MKVToolNix. Track IDs can be found with mkvmerge -i or mkvinfo. Option order matters: global options first, then per-file options before the input file they apply to.

PARAMETERS

-o FILE

Output file.

INPUTS

Input files.

-i FILE

Identify tracks, codecs, and properties of input file.

--audio-tracks IDS

Select audio tracks to include.

--video-tracks IDS

Select video tracks to include.

--subtitle-tracks IDS

Select subtitle tracks to include.

--no-audio

Exclude all audio tracks.

--no-subtitles

Exclude all subtitle tracks.

--language TID:LANG

Set language for a track (ISO 639-2 code).

--default-track-flag TID:BOOL

Set or clear the default track flag.

--split SIZE|duration:TIME|chapters:all

Split output by size, duration, or chapters.

--title TEXT

Set segment title.

--append-to SPEC

Append tracks from one file after another.

-l, --list-types

List supported source file formats.

CAVEATS

Does not transcode (remux only). Part of MKVToolNix. Option order matters: per-file options must precede the input file they apply to. Track IDs are zero-indexed.

HISTORY

mkvmerge is part of MKVToolNix, providing Matroska container manipulation tools.