NAME

       qwavcut - extract and/or delete parts of a wav file

SYNOPSIS

       qwavcut [option]... file

DESCRIPTION

       qwavcut  allows to extract and/or delete a fragment of a wav file. some parameters must be
       supplied in order to define the start/size/end cut points and what to do then: either  the
       fragment must be copied to another file or erased from the file (or both)

GENERAL OPTIONS

       -d, --delete
              deletes  the fragment from the file. if option --output is used, deletion action is
              always done after fragment extraction.

       -h, --help
              show a brief help and exit.

       -o <outfile>, --output=<outfile>
              outfile is the file where the samples  contained  in  the  specified  cut  will  be
              copied.

       -V, --version
              show version and exit.

CUT OPTIONS

       cut  options  are  used to specify at which sample the fragment begins (options -b or -B),
       ends (options -e and -E), or which size it has (option -s). at least, one cut option  must
       be  specified.  neither  the  options  -b  and  -B,  and the options -e and -E can be used
       together; also, a begin, end and size option can be used at the same time.

       by default, the fragment begins at the first sample and ends at the last  sample;  there's
       no default value for size.

       all  the  values are treated as a sample number unless a format specifier is used. see the
       FORMATS section below for information. all values must be positive integer.

       -b <begin>[<format>], --set-begin-from-eof=<begin>[<format>]
              begin specifies the first sample of the file that belongs to the cut counting  from
              the end of the file.

       -B <begin>[<format>], --set-begin=<begin>[<format>]
              begin  specifies the first sample of the file that belongs to the cut counting from
              the beginning of the file.

       -e <end>[<format>], --set-end-from-eof=<end>[<format>]
              end specifies the last sample of the file that belongs to the cut counting from the
              end of the file.

       -E <end>[<format>], --set-end=<end>[<format>]
              end specifies the last sample of the file that belongs to the cut counting from the
              beginning of the file.

       -s <size>[<format>], --set-size=<size>[<format>]
              size specifies the number of samples contained in the cut.

       -S <begin>-<end>, --slice <begin>-<end>
              slice specifies the starting and ending points of the cut as a timeslice, which  is
              to say, two time specifications ([[h:]m:]s[.ms]) joined by a hyphen.

FORMATS

       cut  options  can  have  also an optional modifier. if this modifier is not used, then the
       value provided with the corresponding cut option  will  be  interpreted  as  a  number  of
       samples.  since  most of the times will be difficult to specify a cut in terms of samples,
       the following modifiers are provided:

       j      value is interpreted as milliseconds.

       m      value is interpreted as minutes.

       s      value is interpreted as seconds.

       b      value is interpreted as bytes.

       k      value is interpreted as kbytes (1024 bytes).

       M      value is interpreted as megabytes (1024 kbytes).

       in either case, the values specified will be rounded to get an integer number of samples.

EXAMPLES

       here are some examples:

       to get the last ten seconds of a file:
              qwavcut -b 10s -o outfile.wav infile.wav

       four ways of getting the first minute of a file:
              qwavcut -S -1:0 -o outfile.wav infile.wav
              qwavcut -S -60 -o outfile.wav infile.wav
              qwavcut -E 1m -o outfile.wav infile.wav
              qwavcut -s 1m -o outfile.wav infile.wav

       four ways of getting the second quarter of a file:
              qwavcut -S 15:0-30:0 -o outfile.wav infile.wav
              qwavcut -B 15m -E 30m -o outfile.wav infile.wav
              qwavcut -s 15m -E 30m -o outfile.wav infile.wav
              qwavcut -B 15m -s 15m -o outfile.wav infile.wav

NOTES

       if neither the options --output nor --delete are specified, the program will do nothing.

       when cutting at the end, a simple truncate call is needed. but when cutting in the  middle
       or in the beginning, all the data behind the cut must be moved ahead and, depending on the
       amount of the data to be moved, this can be a time consuming operation.

BUGS

       tests has been done only with 44100 Hz 16 bit  stereo  files,  though  it  may  work  with
       mono/stereo 8/16 bits files.

AUTHOR

       dmanye@etse.urv.es
       http://www.etse.urv.es/~dmanye/quelcom/quelcom.html

SEE ALSO

       qwavinfo(1), qwavjoin(1), qwavsilence(1), qwavfade(1), qwavheaderdump(1)
       qmp3info(1), qmp3join(1), qmp3cut(1), qmp3check(1), qmp3report(1)