mp2enc - Simple MPEG-1 layer-II audio encoder

       This man page was written by Andrew Stevens.
       If  you  have  questions,  remarks, problems or you just want to contact the developers, the main mailing
       list for the MJPEG-tools is:
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       For more info, see our website at
              http://mjpeg.sourceforge.net

       Mono output does not work for layer I.

       Mp2enc  is a simple MPEG-1 layer-I/II audio encoder.  It is actually a very mildly warmed over version of
       the MPEG Software Simulation Group's reference encoder.  It accepts a WAV file or  stream  on  stdin  and
       ouputs  an  a  layer-I/II  elementary  audio  stream.   It is included in the mjpegtools(1) primarily for
       reasons of completeness and because it is able to perform sampling rate conversion.

       Those seeking a faster (and probably higher quality) layer II encoder are recommended to  use  toolame(1)
       which can be obtained from:

              http://www.planckenergy.com

-bbitrate

              This  sets  the  bit-rate  of the output stream in kBit/sec.  Typical values for layer II might be
              224kbps for good-quality audio suitable for capturing Dolby pro-logic signals.  A rate of  192kbps
              or  128kbps is reasonable for low quality audio (e.g. mono TV audio).  Really high compression is,
              of course, better achieved  using  MPEG-1  layer  III  ("MP3")  audio  encoding  or  AAC.  A  more
              appropriate value for layer I might be 384kbps.

       -rsampling_rate
              Sets  the  audio  sampling rate of the reconstructed output signal in Hz.  Legal values are 32000,
              44100 and 48000Hz.   mp2enc will automatically sample-rate convert the input signal if necessary.

       -llayer
              Sets the audio layer.  Legal values are 1 and 2. The default is layer II.

       -s     Force stereo output.  A mono input signal is channel doubled before encoding to  make  it  stereo.
              This is useful for players which simply can't handle a non-stero signal.

       -m     Force  mono  output.   A  stereo  input  signal  is  down-mixed before encoding.  Useful if you've
              captured a mono signal in stereo and your player can handle mono MPEG-1 Layer 2 audio.

       -e     Use CRC error protection.

       -V     Force VCD compatible output. The primary effect of this is to make certain that the sampling  rate
              is  set  to  44100  (-r  44100).   The  VCD2.0  specifications permit mono audio at 64, 96 and 192
              kbits/sec and stereo at 128, 192, 224, and 384 kbits/sec. Using -V  checks  that  the  bitrate  is
              valid  for  the  number  of  channels.   The defaults (unless -m or -b are used) are stereo at 224
              kbits/sec.

       -ooutputpathname
              The name of the output file to generate.  If '-' is given as the pathname  output  is  written  to
              standard output.

-ooutput_filename
              Specifies the name for the output file.

              An  integer  format  code  (e.g. %d) in the name is replaced the number of the file generated (see
              printf(3)).

       -vnum Set verbosity level to num.  0 = warnings and errors only,  1  =  information  as  well,  2=really
              verbose.  -?  Display a synopsis of the command syntax.

       -Rrate,chans,bits
              Indicate,  that  the  input  is  raw  PCM  without header. You must specify 3 numbers: rate is the
              samplerate in Hz, chans is the number of channels (1 or 2) and bits is  the  number  of  bits  per
              sample. 8 bits are unsigned, 16 bits are signed in machine native byte order.

       mp2enc - Simple MPEG-1 layer-II audio encoder

mpeg2enc(1), mp2enc(1), lavrec(1), lavplay(1), lav2yuv(1), lav2wav(1), yuvscaler(1)

MJPEG Tools Team                                   2 June 2001                                         mp2enc(1)

mp2enc [-vnum] [-bbitrate_kbps] [-routput_sampling_rate_hz] [-Rrate,chans,bits] [-s ] [-m ] [-e ] [-V
       ] [-?]  -ooutput_filename