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FLAC(1)								       FLAC(1)

NAME
       flac - Free Lossless Audio Codec

SYNOPSIS
       flac [ options ] [ infile.wav | infile.aiff | infile.raw | - ... ]

       flac  [	-d  |  --decode | -t | --test | -a | --analyze ] [ OPTIONS ] [
       infile.flac ... ]

DESCRIPTION
       flac is a command-line tool for encoding, decoding, testing and analyz‐
       ing FLAC streams.

       This  manual  page was originally written for the Debian GNU/Linux dis‐
       tribution because the original program did not have a manual page.

OPTIONS
       A summary of options is included below.	For  a	complete  description,
       see the HTML documentation.

   GENERAL OPTIONS
       -v, --version
	      Show the flac version number

       -h, --help
	      Show basic usage and a list of all options

       -H, --explain
	      Show detailed explanation of usage and all options

       -d, --decode
	      Decode (the default behavior is to encode)

       -t, --test
	      Test  a  flac encoded file (same as -d except no decoded file is
	      written)

       -a, --analyze
	      Analyze a FLAC encoded file (same as -d except an analysis  file
	      is written)

       -c, --stdout
	      Write output to stdout

       -s, --silent
	      Silent  mode  (do	 not write runtime encode/decode statistics to
	      stderr)

       --totally-silent
	      Do not print anything of any kind, including warnings or errors.
	      The  exit code will be the only way to determine successful com‐
	      pletion.

       -f, --force
	      Force overwriting of output files.  By default, flac warns  that
	      the output file already exists and continues to the next file.

       -o filename, --output-name=filename
	      Force the output file name (usually flac just changes the exten‐
	      sion).  May only be used when encoding a single file.   May  not
	      be used in conjunction with --output-prefix.

       --output-prefix=string
	      Prefix each output file name with the given string.  This can be
	      useful for encoding or decoding files to a different  directory.
	      Make  sure  if  your  string  is a path name that it ends with a
	      trailing `/' (slash).

       --delete-input-file
	      Automatically delete the input file after a successful encode or
	      decode.	If  there  was an error (including a verify error) the
	      input file is left intact.

       --skip={#|mm:ss.ss}
	      Skip over the first number of samples of the input.  This	 works
	      for  both	 encoding and decoding, but not testing.  The alterna‐
	      tive form mm:ss.ss can be used to specify minutes, seconds,  and
	      fractions of a second.

       --until={#|[+|-]mm:ss.ss}
	      Stop at the given sample number for each input file.  This works
	      for both encoding and decoding, but not testing.	The given sam‐
	      ple  number is not included in the decoded output.  The alterna‐
	      tive form mm:ss.ss can be used to specify minutes, seconds,  and
	      fractions	 of  a	second.	 If a `+' (plus) sign is at the begin‐
	      ning, the --until point is relative to the --skip point.	 If  a
	      `-' (minus) sign is at the beginning, the --until point is rela‐
	      tive to end of the audio.

       --ogg  When encoding, generate Ogg FLAC output instead of native	 FLAC.
	      Ogg  FLAC	 streams  are FLAC streams wrapped in an Ogg transport
	      layer.  The resulting file should have an '.ogg'	extension  and
	      will still be decodable by flac.

	      When  decoding, force the input to be treated as Ogg FLAC.  This
	      is useful when piping input from stdin or when the filename does
	      not end in '.ogg'.

       --serial-number=#
	      When used with --ogg, specifies the serial number to use for the
	      first Ogg FLAC stream, which is then incremented for each	 addi‐
	      tional  stream.	When  encoding	and no serial number is given,
	      flac uses a random number for the first stream, then  increments
	      it  for  each additional stream.	When decoding and no number is
	      given, flac uses the serial number of the first page.

   ANALYSIS OPTIONS
       --residual-text
	      Includes the residual signal in the analysis  file.   This  will
	      make the file very big, much larger than even the decoded file.

       --residual-gnuplot
	      Generates a gnuplot file for every subframe; each file will con‐
	      tain the residual distribution of the subframe.  This will  cre‐
	      ate a lot of files.

   DECODING OPTIONS
       --cue=[#.#][-[#.#]]
	      Set  the beginning and ending cuepoints to decode.  The optional
	      first #.# is the track and index point at	 which	decoding  will
	      start; the default is the beginning of the stream.  The optional
	      second #.# is the track and index point at which	decoding  will
	      end; the default is the end of the stream.  If the cuepoint does
	      not exist, the closest one before it (for the  start  point)  or
	      after  it	 (for  the  end	 point)	 will be used.	If those don't
	      exist, the start of the stream (for the start point) or  end  of
	      the  stream (for the end point) will be used.  The cuepoints are
	      merely translated into sample numbers then used  as  --skip  and
	      --until.

       -F, --decode-through-errors
	      By  default  flac	 stops	decoding with an error and removes the
	      partially decoded file if it encounters a bitstream error.  With
	      -F,  errors are still printed but flac will continue decoding to
	      completion.  Note that errors may cause the decoded audio to  be
	      missing some samples or have silent sections.

   ENCODING OPTIONS
       -V, --verify
	      Verify a correct encoding by decoding the output in parallel and
	      comparing to the original

       --lax  Allow encoder to generate non-Subset files.  The resulting  FLAC
	      file may not be streamable or might have trouble being played in
	      all players (especially hardware devices), so  you  should  only
	      use  this	 option	 in  combination  with custom encoding options
	      meant for archival.

       --replay-gain
	      Calculate ReplayGain values and store in Vorbis comments,	 simi‐
	      lar  to vorbisgain.  Title gains/peaks will be computed for each
	      input file, and an album gain/peak  will	be  computed  for  all
	      files.   All  input  files must have the same resolution, sample
	      rate, and number of channels.  Only mono and  stereo  files  are
	      allowed,	and  the sample rate must be one of 8, 11.025, 12, 16,
	      22.05, 24, 32, 44.1, or 48 kHz.  Also note that this option  may
	      leave  a few extra bytes in a PADDING block as the exact size of
	      the tags is not known until all files are processed.  Note  that
	      this  option  cannot  be	used  when encoding to standard output
	      (stdout).

       --cuesheet=filename
	      Import the given cuesheet file and store it in a CUESHEET	 meta‐
	      data block.  This option may only be used when encoding a single
	      file.  A seekpoint will be added for each	 index	point  in  the
	      cuesheet	to the SEEKTABLE unless --no-cued-seekpoints is speci‐
	      fied.

       --sector-align
	      Align encoding of multiple CD format WAVE files on sector bound‐
	      aries.  See the HTML documentation for more information.

       -S {#|X|#x|#s}, --seekpoint={#|X|#x|#s}
	      Include a point or points in a SEEKTABLE.	 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).  You may use many -S options; the resulting
	      SEEKTABLE will be the unique-ified union	of  all	 such  values.
	      With  no	-S options, flac defaults to '-S 10s'.	Use --no-seek‐
	      table for no SEEKTABLE.  Note: '-S #x' and '-S #s' will not work
	      if  the  encoder can't determine the input size before starting.
	      Note: if you use '-S #' and # is >= samples in the input,	 there
	      will  be	either	no  seek  point	 entered (if the input size is
	      determinable before encoding starts) or a placeholder point  (if
	      input size is not determinable).

       -P #, --padding=#
	      Tell  the encoder to write a PADDING metadata block of the given
	      length (in bytes) after the STREAMINFO block.  This is useful if
	      you  plan	 to  tag  the  file  later  with an APPLICATION block;
	      instead of having to rewrite  the	 entire	 file  later  just  to
	      insert  your  block,  you	 can  write  directly over the PADDING
	      block.  Note that the total length of the PADDING block will  be
	      4	 bytes	longer than the length given because of the 4 metadata
	      block header bytes.  You can force no PADDING block at all to be
	      written  with  --no-padding.  The encoder writes a PADDING block
	      of 4096 bytes by default.

       -T FIELD=VALUE, --tag=FIELD=VALUE
	      Add a Vorbis comment.  The comment must  adhere  to  the	Vorbis
	      comment spec; i.e. the FIELD must contain only legal characters,
	      terminated by an 'equals' sign.  Make sure to quote the  comment
	      if necessary.  This option may appear more than once to add sev‐
	      eral comments.  NOTE: all tags will  be  added  to  all  encoded
	      files.

       -b #, --blocksize=#
	      Specify  the  block size in samples.  The default is 1152 for -l
	      0, else 4608; must be one of 192, 576, 1152,  2304,  4608,  256,
	      512,  1024,  2048,  4096, 8192, 16384, or 32768 (unless --lax is
	      used)

       -m, --mid-side
	      Try mid-side coding for each frame (stereo input only)

       -M, --adaptive-mid-side
	      Adaptive mid-side coding for all frames (stereo input only)

       -0..-8, --compression-level-0..--compression-level-8
	      Fastest compression..highest compression (default is -5).	 These
	      are synonyms for other options:

	      -0, --compression-level-0
		     Synonymous with -l 0 -b 1152 -r 2,2

	      -1, --compression-level-1
		     Synonymous with -l 0 -b 1152 -M -r 2,2

	      -2, --compression-level-2
		     Synonymous with -l 0 -b 1152 -m -r 3

	      -3, --compression-level-3
		     Synonymous with -l 6 -b 4608 -r 3,3

	      -4, --compression-level-4
		     Synonymous with -l 8 -b 4608 -M -r 3,3

	      -5, --compression-level-5
		     Synonymous with -l 8 -b 4608 -m -r 3,3

	      -6, --compression-level-6
		     Synonymous with -l 8 -b 4608 -m -r 4

	      -7, --compression-level-7
		     Synonymous with -l 8 -b 4608 -m -e -r 6

	      -8, --compression-level-8
		     Synonymous with -l 12 -b 4608 -m -e -r 6

       --fast Fastest compression.  Currently synonymous with -0.

       --best Highest compression.  Currently synonymous with -8.

       -e, --exhaustive-model-search
	      Do exhaustive model search (expensive!)

       -l #, --max-lpc-order=#
	      Set the maximum LPC order; 0 means use only the fixed predictors

       -p, --qlp-coeff-precision-search
	      Do  exhaustive  search  of  LP  coefficient quantization (expen‐
	      sive!).  Overrides -q; does nothing if using -l 0

       -q #, --qlp-coeff-precision=#
	      Precision of the quantized linear-predictor coefficients,	 0  =>
	      let encoder decide (min is 5, default is 0)

       -r [#,]#, --rice-partition-order=[#,]#
	      Set the [min,]max residual partition order (0..16). min defaults
	      to 0 if unspecified.  Default is -r 3,3.

   FORMAT OPTIONS
       --endian={big|little}
	      Set the byte order for samples

       --channels=#
	      Set number of channels.

       --bps=#
	      Set bits per sample.

       --sample-rate=#
	      Set sample rate (in Hz).

       --sign={signed|unsigned}
	      Set the sign of samples (the default is signed).

       --input-size=#
	      Specify the size of the raw input in bytes.  If you are encoding
	      raw  samples from stdin, you must set this option in order to be
	      able to use --skip, --until, --cue-sheet, or other options  that
	      need  to	know  the  size	 of the input beforehand.  If the size
	      given is greater than what is found in  the  input  stream,  the
	      encoder  will  complain about an unexpected end-of-file.	If the
	      size given is less, samples will be truncated.

       --force-aiff-format
	      Force the decoder to output AIFF format.	 This  option  is  not
	      needed  if  the  output filename (as set by -o) ends with .aiff.
	      Also, this option has no effect when encoding since  input  AIFF
	      is auto-detected.

       --force-raw-format
	      Force  input  (when  encoding)  or  output (when decoding) to be
	      treated as raw samples (even if filename ends in .wav).

   NEGATIVE OPTIONS
       --no-adaptive-mid-side

       --no-decode-through-errors

       --no-delete-input-file

       --no-exhaustive-model-search

       --no-lax

       --no-mid-side

       --no-ogg

       --no-padding

       --no-qlp-coeff-precision-search

       --no-residual-gnuplot

       --no-residual-text

       --no-sector-align

       --no-seektable

       --no-silent

       --no-verify
	      These flags can be used to invert the sense of the corresponding
	      normal option.

SEE ALSO
       metaflac(1).

       The  programs are documented fully by HTML format documentation, avail‐
       able in /usr/share/doc/flac/html on Debian GNU/Linux systems.

AUTHOR
       This manual page was written by Matt Zimmerman <mdz@debian.org> for the
       Debian GNU/Linux system (but may be used by others).

			       02 February 2005			       FLAC(1)
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