Provided by: mkvtoolnix_5.1.0-1ubuntu1_amd64 bug

NAME

       mkvextract - extract tracks from Matroska(TM) files into other files

SYNOPSIS

       mkvextract {mode} {source-filename} [options] [extraction-spec]

DESCRIPTION

       This program extracts specific parts from a Matroska(TM) file to other useful formats. The
       first argument, mode, tells mkvextract(1) what to extract. Currently supported is the
       extraction of tracks, tags, attachments, chapters, CUE sheets and timecodes. The second
       argument is the name of the source file. It must be a Matroska(TM) file. All following
       arguments are options and extraction specifications; both of which depend on the selected
       mode.

   Common options
       The following options are available in all modes and only described once in this section.

       -f, --parse-fully
           Sets the parse mode to 'full'. The default mode does not parse the whole file but uses
           the meta seek elements for locating the required elements of a source file. In 99% of
           all cases this is enough. But for files that do not contain meta seek elements or
           which are damaged the user might have to use this mode. A full scan of a file can take
           a couple of minutes while a fast scan only takes seconds.

       --command-line-charset character-set
           Sets the character set to convert strings given on the command line from. It defaults
           to the character set given by system's current locale.

       --output-charset character-set
           Sets the character set to which strings are converted that are to be output. It
           defaults to the character set given by system's current locale.

       -r, --redirect-output file-name
           Writes all messages to the file file-name instead of to the console. While this can be
           done easily with output redirection there are cases in which this option is needed:
           when the terminal reinterprets the output before writing it to a file. The character
           set set with --output-charset is honored.

       --ui-language code
           Forces the translations for the language code to be used (e.g. 'de_DE' for the German
           translations). It is preferable to use the environment variables LANG, LC_MESSAGES and
           LC_ALL though. Entering 'list' as the code will cause mkvextract(1) to output a list
           of available translations.

       -v, --verbose
           Be verbose and show all the important Matroska(TM) elements as they're read.

       -h, --help
           Show usage information and exit.

       -V, --version
           Show version information and exit.

       --check-for-updates
           Checks online for new releases by downloading the URL
           http://mkvtoolnix-releases.bunkus.org/latest-release.xml. Four lines will be output in
           key=value style: the URL from where the information was retrieved (key
           version_check_url), the currently running version (key running_version), the latest
           release's version (key available_version) and the download URL (key download_url).

           Afterwards the program exists with an exit code of 0 if no newer release is available,
           with 1 if a newer release is available and with 2 if an error occured (e.g. if the
           update information could not be retrieved).

           This option is only available if the program was built with support for libcurl.

       @options-file
           Reads additional command line arguments from the file options-file. Lines whose first
           non-whitespace character is a hash mark ('#') are treated as comments and ignored.
           White spaces at the start and end of a line will be stripped. Each line must contain
           exactly one option.

           Several chars can be escaped, e.g. if you need to start a non-comment line with '#'.
           The rules are described in the section about escaping text.

           The command line 'mkvextract tracks source.mkv --raw 1:destination.raw' could be
           converted into the following option file:

               # Extract a track from source.mkv
               tracks
               source.mkv
               # Output the track as raw data.
               --raw
               1:destination.raw

   Track extraction mode
       Syntax: mkvextract tracks source-filename [options] TID1:dest-filename1
       [TID2:dest-filename2 ...]

       The following command line options are available for each track in the 'tracks' extraction
       mode. They have to appear in front of the track specification (see below) they should be
       applied to.

       -c character-set
           Sets the character set to convert the next text subtitle track to. Only valid if the
           next track ID targets a text subtitle track. It defaults to UTF-8.

       --blockadd level
           Keep only the BlockAdditions up to this level. The default is to keep all levels. This
           option only affects certain kinds of codecs like WAVPACK4.

       --cuesheet
           Causes mkvextract(1) to extract a CUE sheet from the chapter information and tag data
           for the following track into a file whose name is the track's output name with '.cue'
           appended to it.

       --raw
           Extracts the raw data into a file without any container data around it. Unlike the
           --fullraw flag this flag does not cause the contents of the CodecPrivate element to be
           written to the file. This mode works with all CodecIDs, even the ones that
           mkvextract(1) doesn't support otherwise, but the resulting files might not be usable.

       --fullraw
           Extracts the raw data into a file without any container data around it. The contents
           of the CodecPrivate element will be written to the file first if the track contains
           such a header element. This mode works with all CodecIDs, even the ones that
           mkvextract(1) doesn't support otherwise, but the resulting files might not be usable.

       TID:outname
           Causes extraction of the track with the ID TID into the file outname if such a track
           exists in the source file. This option can be given multiple times. The track IDs are
           the same as the ones output by mkvmerge(1)'s --identify option.

           Each output name should be used only once. The exception are RealAudio and RealVideo
           tracks. If you use the same name for different tracks then those tracks will be saved
           in the same file. Example:

               $ mkvextract tracks input.mkv 1:output-two-tracks.rm 2:output-two-tracks.rm

   Tags extraction mode
       Syntax: mkvextract tags source-filename [options]

       The extracted tags are written to the console unless the output is redirected (see the
       section about output redirection for details).

   Attachments extraction mode
       Syntax: mkvextract attachments source-filename [options] AID1:outname1 [AID2:outname2 ...]

       AID:outname
           Causes extraction of the attachment with the ID AID into the file outname if such an
           attachment exists in the source file. If the outname is left empty then the name of
           the attachment inside the source Matroska(TM) file is used instead. This option can be
           given multiple times. The attachment IDs are the same as the ones output by
           mkvmerge(1)'s --identify option.

   Chapters extraction mode
       Syntax: mkvextract chapters source-filename [options]

       -s, --simple
           Exports the chapter information in the simple format used in the OGM tools
           (CHAPTER01=..., CHAPTER01NAME=...). In this mode some information has to be discarded.
           Default is to output the chapters in XML format.

       The extracted chapters are written to the console unless the output is redirected (see the
       section about output redirection for details).

   Cue sheet extraction mode
       Syntax: mkvextract cuesheet source-filename [options]

       The extracted cue sheet is written to the console unless the output is redirected (see the
       section about output redirection for details).

   Timecode extraction mode
       Syntax: mkvextract timecodes_v2 source-filename [options] TID1:dest-filename1
       [TID2:dest-filename2 ...]

       The extracted timecodes are written to the console unless the output is redirected (see
       the section about output redirection for details).

       TID:outname
           Causes extraction of the timecodes for the track with the ID TID into the file outname
           if such a track exists in the source file. This option can be given multiple times.
           The track IDs are the same as the ones output by mkvmerge(1)'s --identify option.

           Example:

               $ mkvextract timecodes_v2 input.mkv 1:tc-track1.txt 2:tc-track2.txt

OUTPUT REDIRECTION

       Several extraction modes cause mkvextract(1) to write the extracted data to the console.
       There are generally two ways of writing this data into a file: one provided by the shell
       and one provided by mkvextract(1) itself.

       The shell's builtin redirection mechanism is used by appending '> output-filename.ext' to
       the command line. Example:

           $ mkvextract tags source.mkv > tags.xml

       mkvextract(1)'s own redirection is invoked with the --redirect-output option. Example:

           $ mkvextract tags source.mkv --redirect-output tags.xml

           Note
           On Windows you should probably use the --redirect-output option because cmd.exe
           sometimes interpretes special characters before they're written into the output file
           resulting in broken output.

OUTPUT FILE FORMATS

       The decision about the output format is based on the track type, not on the extension used
       for the output file name. The following track types are supported at the moment:

       V_MPEG4/ISO/AVC

           H.264 / AVC video tracks are written to H.264 elementary streams which can be
           processed further with e.g.  MP4Box(TM) from the GPAC(TM) package.

       V_MS/VFW/FOURCC
           Fixed FPS video tracks with this CodecID are written to AVI files.

       V_REAL/*

           RealVideo(TM) tracks are written to RealMedia(TM) files.

       A_MPEG/L3, A_AC3
           These will be extracted to raw MP3 and AC3 files.

       A_PCM/INT/LIT
           Raw PCM data will be written to a WAV file.

       A_AAC/MPEG2/*, A_AAC/MPEG4/*, A_AAC
           All AAC files will be written into an AAC file with ADTS headers before each packet.
           The ADTS headers will not contain the deprecated emphasis field.

       A_VORBIS
           Vorbis audio will be written into an OggVorbis(TM) file.

       A_REAL/*

           RealAudio(TM) tracks are written to RealMedia(TM) files.

       A_TTA1

           TrueAudio(TM) tracks are written to TTA files. Please note that due to Matroska(TM)'s
           limited timecode precision the extracted file's header will be different regarding two
           fields: data_length (the total number of samples in the file) and the CRC.

       S_TEXT/UTF8
           Simple text subtitles will be written as SRT files.

       S_TEXT/SSA, S_TEXT/ASS

           SSA and ASS text subtitles will be written as SSA/ASS files respectively.

       S_KATE

           Kate(TM) streams will be written within an Ogg(TM) container.

       Tags
           Tags are converted to a XML format. This format is the same that mkvmerge(1) supports
           for reading tags.

       Attachments
           Attachments are written to they output file as they are. No conversion whatsoever is
           done.

       Chapters
           Chapters are converted to a XML format. This format is the same that mkvmerge(1)
           supports for reading chapters. Alternatively a stripped-down version can be output in
           the simple OGM style format.

       Timecodes
           Timecodes are first sorted and then output as a timecode v2 format compliant file
           ready to be fed to mkvmerge(1). The extraction to other formats (v1, v3 and v4) is not
           supported.

EXIT CODES

       mkvextract(1) exits with one of three exit codes:

       ·    0 -- This exit codes means that extraction has completed successfully.

       ·    1 -- In this case mkvextract(1) has output at least one warning, but extraction did
           continue. A warning is prefixed with the text 'Warning:'. Depending on the issues
           involved the resulting files might be ok or not. The user is urged to check both the
           warning and the resulting files.

       ·    2 -- This exit code is used after an error occurred.  mkvextract(1) aborts right
           after outputting the error message. Error messages range from wrong command line
           arguments over read/write errors to broken files.

ESCAPING SPECIAL CHARS IN TEXT

       There are a few places in which special characters in text must or should be escaped. The
       rules for escaping are simple: each character that needs escaping is replaced with a
       backslash followed by another character.

       The rules are: ' ' (a space) becomes '\s', '"' (double quotes) becomes '\2', ':' becomes
       '\c', '#' becomes '\h' and '\' (a single backslash) itself becomes '\\'.

SEE ALSO

       mkvmerge(1), mkvinfo(1), mkvpropedit(1), mmg(1)

WWW

       The latest version can always be found at the MKVToolNix homepage[1].

AUTHOR

       Moritz Bunkus <moritz@bunkus.org>
           Developer

NOTES

        1. the MKVToolNix homepage
           http://www.bunkus.org/videotools/mkvtoolnix/