1MKVINFO(1)                       User Commands                      MKVINFO(1)
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NAME

6       mkvinfo - Print information about elements in Matroska(TM) files
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SYNOPSIS

9       mkvinfo [options] {source-filename}
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DESCRIPTION

12       This program lists all elements contained in a Matroska(TM). The output
13       can be limited to a list of tracks in the file including information
14       about the codecs used.
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16       -a, --all
17           By default mkvinfo(1) stops when it encounters the first cluster.
18           Additionally it doesn't show certain often occurring elements. With
19           this option mkvinfo(1) will continue processing regardless of the
20           verbosity level and show all elements.
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22       -c, --checksums
23           Calculates and display the Adler-32 checksum for each frame. Useful
24           for debugging only.
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26       -o, --continue
27           By default mkvinfo(1) stops when it encounters the first cluster.
28           With this option mkvinfo(1) will continue processing regardless of
29           the verbosity level.
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31       -p, --hex-positions
32           Show the positions of all elements in hexadecimal regardless of the
33           verbosity level.
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35       -P, --positions
36           Show the positions of all elements in decimal regardless of the
37           verbosity level.
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39       -s, --summary
40           Only show a terse summary of what mkvinfo(1) finds and not each
41           element.
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43       -t, --track-info
44           Show statistics for each track in verbose mode. Also sets verbosity
45           to 1 if it was at level 0 before.
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47       -x, --hexdump
48           Show the first 16 bytes of each frame as a hex dump.
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50       -X, --full-hexdump
51           Show all bytes of each frame as a hex dump.
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53       -z, --size
54           Show the size of each element including its header.
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56       --command-line-charset character-set
57           Sets the character set to convert strings given on the command line
58           from. It defaults to the character set given by system's current
59           locale.
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61       --output-charset character-set
62           Sets the character set to which strings are converted that are to
63           be output. It defaults to the character set given by system's
64           current locale.
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66       -r, --redirect-output file-name
67           Writes all messages to the file file-name instead of to the
68           console. While this can be done easily with output redirection
69           there are cases in which this option is needed: when the terminal
70           reinterprets the output before writing it to a file. The character
71           set set with --output-charset is honored.
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73       --ui-language code
74           Forces the translations for the language code to be used (e.g.
75           'de_DE' for the German translations). Entering 'list' as the code
76           will cause the program to output a list of available translations.
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78       --abort-on-warnings
79           Tells the program to abort after the first warning is emitted. The
80           program's exit code will be 1.
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82       --debug topic
83           Turn on debugging for a specific feature. This option is only
84           useful for developers.
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86       --engage feature
87           Turn on experimental features. A list of available features can be
88           requested with mkvinfo --engage list. These features are not meant
89           to be used in normal situations.
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91       --gui-mode
92           Turns on GUI mode. In this mode specially-formatted lines may be
93           output that can tell a controlling GUI what's happening. These
94           messages follow the format '#GUI#message'. The message may be
95           followed by key/value pairs as in
96           '#GUI#message#key1=value1#key2=value2...'. Neither the messages nor
97           the keys are ever translated and always output in English.
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99       -v, --verbose
100           Be more verbose. See the section about verbosity levels for a
101           description which information will be output at which level.
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103       -h, --help
104           Show usage information and exit.
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106       -V, --version
107           Show version information and exit.
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109       @options-file.json
110           Reads additional command line arguments from the file options-file.
111           For a full explanation on the supported formats for such files see
112           the section called "Option files" in the mkvmerge(1) man page.
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VERBOSITY LEVELS

115       The -v option can be used to increase mkvinfo(1)'s verbosity level and
116       print more information about the current file.
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118       At level 0 mkvinfo(1) will print only the track headers it finds and
119       their types.  mkvinfo(1) will exit as soon as the headers are parsed
120       completely (more technical: as soon as the first cluster is
121       encountered). In this level the seek head entries and the cues will not
122       be displayed -- even if they're located in front of the track
123       information.
124
125       At level 1 mkvinfo(1) will also print all Matroska(TM) elements
126       encountered for the complete file but the seek head entries and the cue
127       entries. If the summary mode is enabled then mkvinfo(1) will output the
128       frame position as well.
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130       The same effect can be achieved with the option --continue.
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132       At level 2 mkvinfo(1) will also print the seek head entries, the cue
133       entries and the file position at which each Matroska(TM) element can be
134       found at.
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136       The same effect can be achieved with the options --all --positions.
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138       At level 3 and above mkvinfo(1) will print some information that is not
139       directly connected to a Matroska(TM) element. All other elements only
140       print stuff about the elements that were just found. Level 3 adds meta
141       information to ease debugging (read: it's intended for developers
142       only). All lines written by level 3 are enclosed in square brackets to
143       make filtering them out easy.
144

TEXT FILES AND CHARACTER SET CONVERSIONS

146       For an in-depth discussion about how all tools in the MKVToolNix suite
147       handle character set conversions, input/output encoding, command line
148       encoding and console encoding please see the identically-named section
149       in the mkvmerge(1) man page.
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EXIT CODES

152       mkvinfo(1) exits with one of three exit codes:
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1540 -- This exit code means that the run has completed successfully.
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1561 -- In this case mkvinfo(1) has output at least one warning, but
157           the run did continue. A warning is prefixed with the text
158           'Warning:'.
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1602 -- This exit code is used after an error occurred.  mkvinfo(1)
161           aborts right after outputting the error message. Error messages
162           range from wrong command line arguments over read/write errors to
163           broken files.
164

ENVIRONMENT VARIABLES

166       mkvinfo(1) uses the default variables that determine the system's
167       locale (e.g.  LANG and the LC_* family). Additional variables:
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169       MKVINFO_DEBUG, MKVTOOLNIX_DEBUG and its short form MTX_DEBUG
170           The content is treated as if it had been passed via the --debug
171           option.
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173       MKVINFO_ENGAGE, MKVTOOLNIX_ENGAGE and its short form MTX_ENGAGE
174           The content is treated as if it had been passed via the --engage
175           option.
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SEE ALSO

178       mkvmerge(1), mkvextract(1), mkvpropedit(1), mkvtoolnix-gui(1)
179

WWW

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

184       Moritz Bunkus <moritz@bunkus.org>
185           Developer
186

NOTES

188        1. the MKVToolNix homepage
189           https://mkvtoolnix.download/
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193MKVToolNix 73.0.0                 2023-01-02                        MKVINFO(1)
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