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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-09-05 13:14:37 +0000
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+% metaflac(1) Version 1.4.3 | Free Lossless Audio Codec metadata tool
+
+# NAME
+
+metaflac - program to list, add, remove, or edit metadata in one or more
+FLAC files.
+
+# SYNOPSIS
+
+**metaflac** \[ *options* \] \[ *operations* \] *FLACfile ...*
+
+# DESCRIPTION
+
+Use **metaflac** to list, add, remove, or edit metadata in one or more
+FLAC files. You may perform one major operation, or many shorthand
+operations at a time.
+
+# GENERAL USAGE
+
+metaflac is the command-line .flac file metadata editor. You can use it
+to list the contents of metadata blocks, edit, delete or insert blocks,
+and manage padding.
+
+metaflac takes a set of "options" (though some are not optional) and a
+set of FLAC files to operate on. There are three kinds of "options":
+
+- Major operations, which specify a mode of operation like listing
+ blocks, removing blocks, etc. These will have sub-operations describing
+ exactly what is to be done.
+
+- Shorthand operations, which are convenient synonyms for major
+ operations. For example, there is a shorthand operation
+ --show-sample-rate that shows just the sample rate field from the
+ STREAMINFO metadata block.
+
+- Global options, which affect all the operations.
+
+All of these are described in the tables below. At least one shorthand
+or major operation must be supplied. You can use multiple shorthand
+operations to do more than one thing to a file or set of files. Most of
+the common things to do to metadata have shorthand operations. As an
+example, here is how to show the MD5 signatures for a set of three FLAC
+files:
+
+`metaflac --show-md5sum file1.flac file2.flac file3.flac`
+
+Another example; this removes all DESCRIPTION and COMMENT tags in a set
+of FLAC files, and uses the --preserve-modtime global option to keep the
+FLAC file modification times the same (usually when files are edited the
+modification time is set to the current time):
+
+`metaflac --preserve-modtime --remove-tag=DESCRIPTION --remove-tag=COMMENT file1.flac file2.flac file3.flac`
+
+# OPTIONS
+
+**\--preserve-modtime**
+: Preserve the original modification time in spite of edits.
+
+**\--with-filename**
+: Prefix each output line with the FLAC file name (the default if more
+ than one FLAC file is specified). This option has no effect for
+ options exporting to a file, like --export-tags-to.
+
+**\--no-filename**
+: Do not prefix each output line with the FLAC file name (the default
+ if only one FLAC file is specified).
+
+**\--no-utf8-convert**
+: Do not convert tags from UTF-8 to local charset, or vice versa. This
+ is useful for scripts, and setting tags in situations where the
+ locale is wrong.
+
+**\--dont-use-padding**
+: By default metaflac tries to use padding where possible to avoid
+ rewriting the entire file if the metadata size changes. Use this
+ option to tell metaflac to not take advantage of padding this way.
+
+# SHORTHAND OPERATIONS
+
+**\--show-md5sum**
+: Show the MD5 signature from the STREAMINFO block.
+
+**\--show-min-blocksize**
+: Show the minimum block size from the STREAMINFO block.
+
+**\--show-max-blocksize**
+: Show the maximum block size from the STREAMINFO block.
+
+**\--show-min-framesize**
+: Show the minimum frame size from the STREAMINFO block.
+
+**\--show-max-framesize**
+: Show the maximum frame size from the STREAMINFO block.
+
+**\--show-sample-rate**
+: Show the sample rate from the STREAMINFO block.
+
+**\--show-channels**
+: Show the number of channels from the STREAMINFO block.
+
+**\--show-bps**
+: Show the \# of bits per sample from the STREAMINFO block.
+
+**\--show-total-samples**
+: Show the total \# of samples from the STREAMINFO block.
+
+**\--show-vendor-tag**
+: Show the vendor string from the VORBIS_COMMENT block.
+
+**\--show-tag=name**
+: Show all tags where the field name matches 'name'.
+
+**\--show-all-tags**
+: Show all tags. This is an alias for --export-tags-to=-.
+
+**\--remove-tag=name**
+: Remove all tags whose field name is 'name'.
+
+**\--remove-first-tag=name**
+: Remove first tag whose field name is 'name'.
+
+**\--remove-all-tags**
+: Remove all tags, leaving only the vendor string.
+
+**\--remove-all-tags-except=NAME1\[=NAME2\[=...\]\]**
+: Remove all tags, except the vendor string and the tag names
+ specified. Tag names must be separated by an = character.
+
+**\--set-tag=field**
+: Add a tag. The field must comply with the Vorbis comment spec, of the
+ form "NAME=VALUE". If there is currently no tag block, one will be
+ created.
+
+**\--set-tag-from-file=field**
+: Like \--set-tag, except the VALUE is a filename whose contents will
+ be read verbatim to set the tag value. Unless \--no-utf8-convert is
+ specified, the contents will be converted to UTF-8 from the local
+ charset. This can be used to store a cuesheet in a tag (e.g.
+ \--set-tag-from-file="CUESHEET=image.cue"). Do not try to store
+ binary data in tag fields! Use APPLICATION blocks for that.
+
+**\--import-tags-from=file**
+: Import tags from a file. Use '-' for stdin. Each line should be of
+ the form NAME=VALUE. Multi-line comments are currently not supported.
+ Specify \--remove-all-tags and/or \--no-utf8-convert before
+ \--import-tags-from if necessary. If FILE is '-' (stdin), only one
+ FLAC file may be specified.
+
+**\--export-tags-to=file**
+: Export tags to a file. Use '-' for stdout. Each line will be of the
+ form NAME=VALUE. Specify \--no-utf8-convert if necessary.
+
+**\--import-cuesheet-from=file**
+: Import a cuesheet from a file. Use '-' for stdin. Only one FLAC file
+ may be specified. A seekpoint will be added for each index point in
+ the cuesheet to the SEEKTABLE unless \--no-cued-seekpoints is
+ specified.
+
+**\--export-cuesheet-to=file**
+: Export CUESHEET block to a cuesheet file, suitable for use by CD
+ authoring software. Use '-' for stdout. Only one FLAC file may be
+ specified on the command line.
+
+**\--import-picture-from={***FILENAME***\|***SPECIFICATION***}**
+: Import a picture and store it in a PICTURE metadata block. More than
+ one \--import-picture-from command can be specified. Either a filename
+ for the picture file or a more complete specification form can be
+ used. The SPECIFICATION is a string whose parts are separated by \|
+ (pipe) characters. Some parts may be left empty to invoke default
+ values. FILENAME is just shorthand for "\|\|\|\|FILENAME". For
+ details on the specification, see the section **Picture
+ specification** in the **flac(1)** man page.
+
+**\--export-picture-to=file**
+: Export PICTURE block to a file. Use '-' for stdout. Only one FLAC
+ file may be specified on the command line. The first PICTURE block
+ will be exported unless \--export-picture-to is preceded by a
+ \--block-number=# option to specify the exact metadata block to
+ extract. Note that the block number is the one shown by \--list.
+
+**\--add-replay-gain**
+: Calculates the title and album gains/peaks of the given FLAC files as
+ if all the files were part of one album, then stores them as FLAC
+ tags. The tags are the same as those used by vorbisgain. Existing
+ ReplayGain tags will be replaced. If only one FLAC file is given,
+ the album and title gains will be the same. Since this operation
+ requires two passes, it is always executed last, after all other
+ operations have been completed and written to disk. All FLAC files
+ specified must have the same resolution, sample rate, and number of
+ channels. Only mono and stereo files are allowed, and the sample
+ rate must be 8, 11.025, 12, 16, 18.9, 22.05, 24, 28, 32, 36, 37.8,
+ 44.1, 48, 56, 64, 72, 75.6, 88.2, 96, 112, 128, 144, 151.2, 176.4,
+ 192, 224, 256, 288, 302.4, 352.8, 384, 448, 512, 576, or 604.8 kHz.
+
+**\--scan-replay-gain**
+: Like \--add-replay-gain, but only analyzes the files rather than
+ writing them to the tags.
+
+**\--remove-replay-gain**
+: Removes the ReplayGain tags.
+
+**\--add-seekpoint={***\#***\|***X***\|***\#x***\|***\#s***}**
+: Add seek points to a SEEKTABLE block. Using \#, a seek point at that
+ sample number is added. Using X, a placeholder point is added at the
+ end of a the table. Using \#x, \# evenly spaced seek points will be
+ added, the first being at sample 0. Using \#s, a seekpoint will be
+ added every \# seconds (# does not have to be a whole number; it can
+ be, for example, 9.5, meaning a seekpoint every 9.5 seconds). If no
+ SEEKTABLE block exists, one will be created. If one already exists,
+ points will be added to the existing table, and any duplicates will
+ be turned into placeholder points. You may use many \--add-seekpoint
+ options; the resulting SEEKTABLE will be the unique-ified union of
+ all such values. Example: \--add-seekpoint=100x \--add-seekpoint=3.5s
+ will add 100 evenly spaced seekpoints and a seekpoint every 3.5
+ seconds.
+
+**\--add-padding=length**
+: Add a padding block of the given length (in bytes). The overall
+ length of the new block will be 4 + length; the extra 4 bytes is for
+ the metadata block header.
+
+# MAJOR OPERATIONS
+
+**\--list**
+: List the contents of one or more metadata blocks to stdout. By
+ default, all metadata blocks are listed in text format. Use the
+ options **\--block-number**, **\--block-type** or
+ **\--except-block-type** to change this behavior.
+
+**\--remove**
+: Remove one or more metadata blocks from the metadata. Use the options
+ **\--block-number**, **\--block-type** or **\--except-block-type**
+ to specify which blocks should be removed. Note that if both
+ \--block-number and \--[except-]block-type are specified, the result
+ is the logical AND of both arguments. Unless \--dont-use-padding
+ is specified, the blocks will be replaced with padding. You may not
+ remove the STREAMINFO block.
+
+**\--block-number=#\[,#\[...\]\]**
+: An optional comma-separated list of block numbers to display. The
+ first block, the STREAMINFO block, is block 0.
+
+**\--block-type=type\[,type\[...\]\]**
+
+**\--except-block-type=type\[,type\[...\]\]**
+: An optional comma-separated list of block types to be included or
+ ignored with this option. Use only one of \--block-type or
+ \--except-block-type. The valid block types are: STREAMINFO, PADDING,
+ APPLICATION, SEEKTABLE, VORBIS_COMMENT, PICTURE. You may narrow down
+ the types of APPLICATION blocks selected by appending APPLICATION
+ with a colon and the ID of the APPLICATION block in either ASCII
+ or hexadecimal representation. E.g. APPLICATION:abcd for the
+ APPLICATION block(s) whose textual representation of the 4-byte ID
+ is "abcd" or APPLICATION:0xXXXXXXXX for the APPLICATION block(s)
+ whose hexadecimal big- endian representation of the 4-byte ID
+ is "0xXXXXXXXX". For the example "abcd" above the hexadecimal
+ equivalalent is 0x61626364
+
+**\--application-data-format=hexdump\|text**
+: If the application block you are displaying contains binary data but
+ your \--data-format=text, you can display a hex dump of the
+ application data contents instead using
+ \--application-data-format=hexdump.
+
+**\--data-format=binary\|binary-headerless\|text**
+: For use with --list. By default a human-readable text
+ representation of the data is isplayed. You may specify
+ --data-format=binary to dump the raw binary form of each metadata
+ block. Specify --data-format=binary-headerless to omit output of
+ metadata block headers, including the id of APPLICATION metadata
+ blocks.
+
+**\--append**
+: Insert a metadata block from a file. This must be a binary block as
+ exported with --list --data-format=binary. The insertion point is
+ defined with --block-number=#. The new block will be added after the
+ given block number. This prevents the illegal insertion of a block
+ before the first STREAMINFO block. You may not --append another
+ STREAMINFO block. It is possible to copy a metadata block from one
+ file to another with this option. For example use
+ `metaflac --list --data-format=binary --block-number=6 file.flac > block`
+ to export the block, and then import it with
+ `metaflac --append anotherfile.flac < block`
+
+**\--remove-all**
+: Remove all metadata blocks (except the STREAMINFO block) from the
+ metadata. Unless \--dont-use-padding is specified, the blocks will be
+ replaced with padding.
+
+**\--merge-padding**
+: Merge adjacent PADDING blocks into single blocks.
+
+**\--sort-padding**
+: Move all PADDING blocks to the end of the metadata and merge them
+ into a single block.
+
+# SEE ALSO
+
+**flac(1)**