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 From : Kirill Frolov                        2:5030/827.2   27 Jul 2003  18:31:16
 To : „Ґ­Ёб Ђ­ в®«мҐўЁз
 Subject : Re: Консольный Player
 -------------------------------------------------------------------------------- 
 

 
 On Mon, 21 Jul 03 12:25:34 +0400, Денис Анатольевич wrote:
 
  ДА> ХМ с *.mp3 честно говоря стормозил :-)). А остальное буду пробовать.
  ДА> Жаль у меня man mpg123 нету.
 mpg123(1)             mpg123(1)
 NAME
        mpg123 - play audio MPEG 1.0/2.0 file (layers 1, 2 and 3)
 
 SYNOPSIS
        mpg123  [ -tscvqy01m24 ] [ -b size ] [ -k num ] [ -n num ]
        [ -f factor ] [ -r rate ] [ -g gain ] [ -a dev ] [ -o s |
        -o  h  | -o l ] [ -d n ] [ -h n ] [ -p proxy ] [ -@ file ]
        file ... | URL ... | -
 
 DESCRIPTION
        mpg123 reads one or more files (or standard input if ``-''
        is  specified)  or URLs and plays them on the audio device
        (default) or outputs them to stdout.  file/URL is  assumed
        to be an MPEG-1/2 audio bit stream.
 
 OPTIONS
        mpg123  options may  be  either the traditional POSIX one
        letter options, or the  GNU  style  long  options.   POSIX
        style  options  start  with a single ``-'', while GNU long
        options start with ``--''.
 
        -t, --test
         Test mode.  The audio stream  is  decoded,  but  no
         output occurs.
 
        -s, --stdout
         The  decoded  audio samples are written to standard
         output, instead of playing them through  the  audio
         device.   This  option  must  be used if your audio
         hardware is not supported by  mpg123.   The  output
         format  is  raw (headerless) linear PCM audio data,
         16 bit, stereo, host byte order.
 
        -c, --check
         Check for filter range violations, and report  them
         for each frame if any occur.
 
        -v, --verbose
         Increase  the  verbosity  level.  For example, disЅ
         plays the frame numbers during decoding.
 
        -q, --quiet
         Quiet.  Suppress diagnostic messages.
 
        -y, --resync
         Try to resync and continue  decoding  if  an  error
         occurs in the input file.  Also try to recover from
         certain broken headers.  Useful if you have a  broЅ
         ken  MPEG  file,  on which mpg123 normally gives up
         saying `Illegal header'.  Be careful: Broken  locaЅ
         tions in MPEG files might cause sharp, loud pops or
         clicks, which might damage your speakers if  played
         too loud.
 
        -0, --single0; -1, --single1
         Decode  only channel 0 (left) or channel 1 (right),
         respectively.   These  options  are  available  for
         stereo MPEG streams only.
 
        -m, --singlemix
         Mix  both  channels.   This option is available for
         stereo MPEG layer-3 streams only.   It  takes  less
         CPU time than full stereo decoding.
 
        -2, --2to1; -4, --4to1
         Performs  a  downsampling  of ratio 2:1 (22 kHz) or
         4:1 (11 kHz) on the  output  stream,  respectively.
         Saves  some  CPU cycles, but at least the 4:1 ratio
         sounds ugly.
 
        -b size, --buffer size
         Use an audio output buffer of size Kbytes.  This is
         useful  to  bypass  short  periods  of heavy system
         activity, which would normally cause the audio outЅ
         put to be interrupted.  You should specify a buffer
         size of at least 1024  (i.e.  1  Mb,  which  equals
         about  6  seconds of audio data) or more; less than
         about 300 does not make much sense.  The default is
         0, which turns buffering off.
 
        -k num, --skip num
         Skip  first  num  frames.   By default the decoding
         starts at the first frame.
 
        -n num, --frames num
         Decode only num frames.  By  default  the  complete
         stream is decoded.
 
        -f factor, --scale factor
         Change scale factor (default: 32768).
 
        -r rate, --rate rate
         Set sample rate (default: automatic).  You may want
         to change this if you need a constant bitrate indeЅ
         pended  of  the  mpeg stream rate. mpg123 automagiЅ
         cally converts the rate. You  should  then  combine
         this with --stereo or --mono.
        -g gain, --gain gain
         Set  audio  hardware  output  gain  (default: don't
         change).
 
        -a dev, --audiodevice dev
         Specify the audio device to use.   The  default  is
         system-dependent  (usually /dev/audio or /dev/dsp).
         Use this option if you have multiple audio  devices
         and the default is not what you want.
 
        -o s, --speaker
         Direct audio output to the speaker.
 
        -o h, --headphones
         Direct audio output to the headphone connector.
 
        -o l, --lineout
         Direct audio output to the line-out connector.
 
        -d n, --doublespeed n
         Only  play  every  n'th frame.  This will cause the
         MPEG stream to be played n times faster, which  can
         be  used for special effects.  Can also be combined
         with the --halfspeed option to  play  3  out  of  4
         frames  etc.  Don't expect great sound quality when
         using this option.
 
        -h n, --halfspeed n
         Play each frame n times.  This will cause the  MPEG
         stream  to  be  played  at  1/n'th  speed  (n times
         slower), which can be used for special effects. Can
         also  be  combined with the --doublespeed option to
         double every  third  frame  or  things  like  that.
         Don't  expect  great  sound quality when using this
         option.
 
        -p URL | none, --proxy URL | none
         The specified proxy will be used for HTTP requests.
         It    should    be    specified    as    full   URL
         (``http://host.domain:port/''), but the ``http://''
         prefix,  the port number and the trailing slash are
         optional (the default port is 80).  Specifying none
         means  not  to use any proxy, and to retrieve files
         directly from the respective servers.  See also the
         ``HTTP SUPPORT'' section.
 
        -u auth, --auth auth
         HTTP authentication to use when recieving files via
         HTTP.  The format used is user:password.
 
        -@ file, --list file
         Read filenames and/or URLs of  MPEG  audio  streams
         from  the  specified  file  in addition to the ones
         specified on the command line (if any).  Note  that
         file  can  be either an ordinary file, a dash ``-''
         to indicate that a list of filenames/URLs is to  be
         read from the standard input, or an URL pointing to
         a an appropriate list  file.   Note:  only  one  -@
         option  can be used (if more than one is specified,
         only the last one will be recognized).
 
        -z, --shuffle
         Shuffle play.  Randomly shuffles the  files  speciЅ
         fied on the command line and in the list file.
 
        --stereo
         Force stereo output
 
        --reopen
         Forces reopen of the audiodevice after ever song
 
        --8bit Forces 8bit output
 
        -Z, --random
         Full random play
 
 OPERANDS
        The following operands are supported:
 
        file(s) The path name(s) of one or more input files.  They
          must be valid MPEG-1/2 audio layer-1, -2 or -3 bit
          streams.   If a dash ``-'' is specified, MPEG data
          will be read from the  standard  input.   FurtherЅ
          more, any name starting with ``http://'' is recogЅ
          nized as URL (see next section).
 
 HTTP SUPPORT
        In addition to reading MPEG audio  streams  from  ordinary
        files   and  from  the  standard  input,  mpg123  supports
        retrieval of MPEG audio files via the HTTP protocol, which
        is used in the World Wide Web (WWW).  Such files are specЅ
        ified using a so-called URL (universal resource location),
        which starts with ``http://''.  When a file with that preЅ
        fix is encountered, mpg123 attempts to open an  HTTP  conЅ
        nection to  the  server in order to retrieve that file to
        decode and play it.
 
        It is often useful to retrieve files through a  WWW  cache
        or  so-called  proxy.  To accomplish this, mpg123 examines
        the  environment  for  variables   named   MP3_HTTP_PROXY,
        http_proxy  and HTTP_PROXY,  in this order.  The value of
        the first one that is set will be used as proxy specificaЅ
        tion.   To  override this, you can use the -p command line
        option (see the ``OPTIONS'' section).  Specifying -p  none
        will  enforce contacting the server directly without using
        any proxy, even if one of the above environment variables
        is set.
 
        Note  that,  in order to play MPEG audio files from a WWW
        server, it is necessary that the connection to that server
        is  fast  enough.   For example,  a  128 kbit/s MPEG file
        requires the network connection to be at least 128  kbit/s
        (16  kbyte/s)  plus protocol overhead.  If you suffer from
        short network  outages, you  should  try  the  -b  option
        (buffer)  to bypass such outages.  If your network connecЅ
        tion is generally not fast enough to retrieve  MPEG  audio
        files  in  realtime,  you  can first download the files to
        your local harddisk (e.g. using lynx(1))  and  then  play
        them from there.
 
        If  authentication  is needed to access the file it can be
        specified with the -u user:pass.
 
 INTERRUPT
        You can abort mpg123 at any time by pressing  Ctrl-C.   If
        you are playing multiple files, this will stop the current
        file and begin playing the next one.  If you want to abort
        playing immediately instead of skipping to the next file,
        press Ctrl-C twice in short succession (within  about  one
        second).
 
        Note that the result of pressing Ctrl-C might not be audiЅ
        ble immediately, due to audio data buffering in the  audio
        device. This delay is system dependent, but it is usually
        not more than one or two seconds.
 
 SEE ALSO
        lynx(1), sox(1), intro(1)
 
 NOTES
        MPEG audio decoding requires a good deal  of  CPU  perforЅ
        mance,  especially layer-3.  To decode it in realtime, you
        should have at  least  a  Pentium,  Alpha,  SuperSparc  or
        equivalent  processor.  You  can  also use the -singlemix
        option to decode mono only, which  reduces  the CPU  load
        somewhat  for  layer-3  streams.   See  also the -2 and -4
        options.
 
        If everything else fails, use the -s option to  decode  to
        standard  output,  direct  it  into a file and then use an
        appropriate utility to play that file.  You might have  to
        use  a  tool  such  as  sox(1) to convert the output to an
        audio format suitable for your audio player.
 
        Also note that mpg123 always generates 16 bit stereo  data
        (if  one  of  the  -single* options is used, two identical
        stereo channels are generated). If your hardware requires
        some  other  format, for example 8 bit mono, you also have
        to use a converter such as sox(1).
 
        If your system is  generally  fast  enough  to  decode  in
        realtime,  but there are sometimes periods of heavy system
        load (such as cronjobs, users logging in remotely,  startЅ
        ing  of ``big'' programs etc.) causing the audio output to
        be interrupted, then you should use the -b option to use a
        buffer of at least 1000 Kbytes.
 
 BUGS
        Known bugs and limitations:
         MPEG-2,  Layer  1  and  2 not tested. May not work.
         (Layer 3 should work.)
         Free format streams are not supported.
         Layer-1 support is not heavily tested.
         No CRC error checking is performed.
         There is currently no support for audio hardware on
         DEC Digital Unix, Ultrix and IBM AIX, therefore the
         -s option has to be used on those platforms.
 
 AUTHORS
        Main author:
         Michael Hipp <hippm@informatik.uni-tuebingen.de>
 
        Uses code (or at least ideas) from:
         MPEG Software Simulation Group (Base package)
         Philipp Knirsch <phil@mpik-tueb.mpg.de> (DCT36/manЅ
         ual unroll)
         Tobias   Bading  <bading@cs.tu-berlin.de>  (subband
         synthesis)
         Jeff Tsay <ctsay@pasteur.eecs.berkeley.edu> (DCT36)
         Thomas Woerner (SGI Audio)
         Damien  Clermonte  <clermond@esiee.fr> (HP-UX audio
         fixes)
         Oliver Fromme <oliver.fromme@heim3.tu-clausthal.de>
 
        Internet references:
        http://www.sfs.nphil.uni-tuebingen.de/~hipp/mpg123.html
        http://www.heim3.tu-clausthal.de/~olli/mpg123/
        (includes information about the mpg123 mailing list)
 
        The latest version is also available from here:
        ftp.tu-clausthal.de:/pub/unix/audio/mpg123
        http://ftp.tu-clausthal.de/pub/unix/audio/mpg123
          21 Apr 1997      mpg123(1)
 --- [ZX]
  * Origin: God yzal eht revo spmuj xof nworb kciuq a! (2:5030/827.2)
 
 

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