add audio(1)
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cinap_lenrek
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@ -1,24 +1,18 @@
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.TH FLACDEC 1
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.TH AUDIO 1
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.SH NAME
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flacdec \- decode FLAC audio files
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.br
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mp3dec \- decode MPEG layer 3 audio files
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.br
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mp3enc \- encode MPEG layer 3 audio files
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.br
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oggdec \- decode Ogg Vorbis audio files
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.br
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oggenc \- encode Ogg Vorbis audio files
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mp3dec, mp3enc, oggdec, oggenc, flacdec \- decode and encode audio files
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.SH SYNOPSIS
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.B audio/flacdec
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.br
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.B audio/mp3dec
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[
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.B -d
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]
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.br
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.in +0.5i
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.ti -0.5i
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.B audio/oggdec
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.br
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.B audio/flacdec
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.PP
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.B audio/oggenc
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.br
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.B audio/mp3enc
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[
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.B -hprv
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@ -42,38 +36,38 @@ q ] [
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] [
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.I "long or silly options"
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]
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.in -0.5i
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.B audio/oggdec
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.br
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.B audio/oggenc
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.SH DESCRIPTION
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.I Flacdec, mp3dec and oggdec
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decode audio from standard input,
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writing 16-bit stereo linear PCM sample data to
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standard output. The
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.B -d
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option enables debug prints to standard error.
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.PP
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.I Mp3enc
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compresses audio on standard input,
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normally PCM-encoded,
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and produces MP3-encoded audio on standard output.
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By default, the MP3 file will use `constant bit-rate' (CBR)
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encoding, but that can be changed via
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.SH DESCRIPTION
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These programs decode and encode various audio formats from and to
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16-bit stereo PCM (little endian). The decoders read the compressed
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audio data from standard input and produce PCM on standard output at
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a sampling frequency of 44.1KHz.
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.PP
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.I Mp3dec
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decodes MPEG audio (layer 1, 2 and 3). The
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.B -d
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option enables debug output to standard error.
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.I Oggdec
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and
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.I flacdec
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are like
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.I mp3dec
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but decode OGG Vorbis and FLAC lossless audio.
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.PP
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The encoders read PCM on standard input and produce compressed audio
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on standard output.
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.I Oggenc
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and
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.I mp3enc
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produce OGG Vorbis and MP3 audio. For
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.I mp3enc,
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the MP3 file will use `constant bit-rate' (CBR) encoding by default,
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but that can be changed via
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.B --abr
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(average bitrate desired, ABR)
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or
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.BR -v
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(variable bitrate, VBR).
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.PP
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.I Oggenc
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reads 44100Hz 16 bit LSB stereo data from standard input, and writes
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encoded
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.I 128 kbit/s
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variable bit rate
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.I ogg vorbis
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stream to standard output.
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.SH MP3ENC OPTIONS
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.SS Options
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.TF "\fB-b \fP"
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.TP
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@ -199,84 +193,48 @@ disable VBR histogram display
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.BI --voice
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experimental voice mode
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.
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.SH EXAMPLES
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Play a
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.L .flac
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file:
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.IP
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.EX
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audio/flacdec < foo.flac >/dev/audio
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.EE
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.LP
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Play an
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.SH EXAMPLE
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Plays back a
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.L .mp3
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file:
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.IP
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.EX
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games/mp3dec < foo.mp3 >/dev/audio
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audio/mp3dec <foo.mp3 >/dev/audio
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.EE
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.LP
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Encode a
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.L .wav
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file as highest-quality MP3:
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file as highest-quality MP3.
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.IP
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.EX
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games/mp3enc -q 0 -b 320 <foo.wav >foo.mp3
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audio/mp3enc -q 0 -b 320
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.EE
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.LP
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Create a fixed 128Kb/s MP3 file from a
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.L .wav
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file:
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file.
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.IP
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.EX
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games/mp3enc -h <foo.wav >foo.mp3
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audio/mp3enc -h <foo.wav >foo.mp3
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.EE
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.LP
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Stream from stereo 44.1KHz raw PCM data, encoding mono at 16KHz
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Streaming from stereo 44.1KHz raw PCM data, encoding mono at 16KHz
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(you may not need
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.IR dd ):
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.IP
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.EX
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dd -conv swab | games/mp3enc -a -r -m m --resample 16 -b 24 >foo.mp3
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.EE
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.LP
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Play an
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.L .ogg
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file:
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.IP
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.EX
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audio/oggdec < foo.ogg > /dev/audio
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.EE
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.LP
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Encode a
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.L .wav
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file as an
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.L .ogg
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file:
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.IP
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.EX
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audio/oggenc < foo.wav > foo.ogg
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dd -conv swab | audio/mp3enc -a -r -m m --resample 16 -b 24
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.EE
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.SH SOURCE
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.B /sys/src/cmd/audio/mp3dec
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.br
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.B /sys/src/cmd/audio/mp3enc
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.br
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.B /sys/src/cmd/audio/oggdec
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.br
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.B /sys/src/cmd/audio/oggenc
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.B /sys/src/cmd/audio
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.SH "SEE ALSO"
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.IR dd (1),
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.IR audio (3),
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.IR cdfs (4),
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.IR play (1),
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.IR juke (7),
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.IR playlistfs (7)
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.br
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.B http://www.underbit.com/products/mad/
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.br
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.B http://www.sulaco.org/mp3
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.B http://xiph.org/doc/
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.br
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.B http://flac.sourceforge.net/documentation.html
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.SH BUGS
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GNU behemoths, lightly tamed. Quality is much better than encoders
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based on the ISO routines, but still not as good as the FhG encoder.
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.PP
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There are zillions of undocumented options.
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It's another GNU behemoth, lightly tamed.
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@ -45,6 +45,9 @@ Mpeg audio.
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.TP
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.B ogg
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Ogg vorbis.
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.TP
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.B flac
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FLAC lossless audio.
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.PP
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By default, raw audio data is written to
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.B /dev/audio
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@ -54,6 +57,5 @@ option.
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.SH SOURCE
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.B /rc/bin/play
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.SH "SEE ALSO"
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.IR mp3dec (1),
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.IR oggdec (1),
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.IR audio (1),
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.IR hget (1)
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