mp3enc man page on Plan9

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MP3ENC(1)							     MP3ENC(1)

       mp3enc - create mp3 audio files

       games/mp3enc [ -hprv ] [ -b bitrate ] [ -B bitrate ] [ -m mode ] [ -q q
	    ] [ -s sfreq ] [ -V q ] [ long or silly options ]

       Mp3enc compresses audio on standard input,  normally  PCM-encoded,  and
       produces	 MP3-encoded  audio  on	 standard output.  By default, the MP3
       file will use `constant bit-rate'  (CBR)	 encoding,  but	 that  can  be
       changed	via  --abr  (average  bitrate  desired,	 ABR)  or -v (variable
       bitrate, VBR).

       -b     set minimum allowed bitrate in Kb/s  for	VBR,  default  32Kb/s.
	      For  CBR,	 set  the  exact  bitrate  in  Kb/s, which defaults to

       -B     set maximum allowed bitrate in Kb/s for VBR, default 256Kb/s.

       -h     same as

       -m     mode may be (s)tereo, (j)oint, (f)orce or	 (m)ono	 (default  j).
	      force forces mid/side stereo on all frames.

       -p     add  CRC	error protection (adds an additional 16 bits per frame
	      to the stream).  This seems to break playback.

       -q     sets output quality to q (see -V).

       -r     input is raw pcm

       -s     set sampling frequency of input file (in KHz) to sfreq,  default
	      is 44.1.

       -v     use variable bitrate (VBR) encoding

       -V     set  quality  setting  for VBR to q.  Default q is 4; 0 produces
	      highest-quality and largest files, and 9 produces lowest-quality
	      and smallest files.

   Long options
       --abr bitrate
	      sets  average  bitrate desired in Kb/s, instead of setting qual‐
	      ity, and generates ABR encoding.

       --resample sfreq
	      set sampling frequency of output file (in KHz) to sfreq, default
	      is input sfreq.

	      input is an MP3 file

   Silly options
       -f     same as Such a deal.

       -o     mark as non-original (i.e. do not set the original bit)

       -c     mark as copyright

       -k     disable sfb=21 cutoff

       -e emp de-emphasis n/5/c (default n)

       -d     allow channels to have different blocktypes

       -t     disable Xing VBR informational tag

       -a     autoconvert from stereo to mono file for mono encoding

       -x     force byte-swapping of input (see dd(1) instead)

       -S     don't print progress report, VBR histograms

	      only use the ATH for masking

	      disable VBR histogram display

	      experimental voice mode

       Encode a file as highest-quality MP3.

	      games/mp3enc -q 0 -b 320

       Create a fixed 128Kb/s MP3 file from a file.

	      games/mp3enc -h <foo.wav >foo.mp3

       Streaming from stereo 44.1KHz raw PCM data, encoding mono at 16KHz (you
       may not need dd):

	      dd -conv swab | games/mp3enc -a -r -m m --resample 16 -b 24


       dd(1), mp3dec(1), audio(3), cdfs(4), audio(7), juke(7), playlistfs(7)

       Quality is much better than encoders based on  the  ISO	routines,  but
       still not as good as the FhG encoder.

       It's  a	GNU  behemoth,	lightly	 rehabilitated.	 There are zillions of
       undocumented options.

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