JACK_CAPTURE(1) 					      General Commands Manual						   JACK_CAPTURE(1)

NAME

       jack_capture - A program for recording anything from jack

SYNOPSIS

       jack_capture [options]
       bar [options]

DESCRIPTION

       This manual page documents briefly the jack_capture command.  This manual page was written for the Debian distribution because the original
       program does not have a manual page.

       jack_capture is a cli program for recording any audio signal from jack to audio audio formats supported by libsndfile library  (wav,  aiff,
       ogg, flac, wavex, au, etc.)

       For more info about libsndfile see http://www.mega-nerd.com/libsndfile/api.html#open

OPTIONS

       These  programs	follow	the  usual  GNU  command  line	syntax, with long options starting with two dashes (`-').  A summary of options is
       included below.

       -b, --bitdepth n
	      is by default FLOAT. It can be set to either 8, 16, 24 or 32. (for relevant formats)

       -c, --channels n
	      is by default 2.

       -p, --port port
	      is by default set to the two first physical outputs. The "port" argument can be specified more than once.

       -d, --duration s
	      Recording is stopped after "s" seconds.

       -z, --leading-zeros n
	      "n" is the number of zeros to in the autogenerated filename.  (-z 2 -> jack_capture_001.wav, and so on.) (default is 1)

       -f, --format format
	      Selects fileformat provided by libsndfile.  See http://www.mega-nerd.com/libsndfile/api.html#open (Default is wav for 1 or  2  chan-
	      nels, and wavex for more than 2.)

       -pf, --print-formats
	      Prints all sound formats provided to sndfile to screen and then exits.

       -v, --version
	      Prints out version.

       -s, --silent
	      Suppress some common messages printed to the terminal.

       -V, --verbose]
	      Prints some extra information to the terminal.

       -mp3, --mp3
	      Writes to an mp3 file using liblame (LAME). (the --format option has no effect using this option)

       -mp3q, --mp3-quality n
	      Selects  mp3  quality  provided  by  liblame.  n=0 is best, n=9 is worst. Default n is 2. (0 uses the most amount of CPU, 9 uses the
	      least)

       -mp3b, --mp3-bitrate n
	      Selects mp3 bitrate (in kbit/s). Default is set by liblame. (currently 128)

       -ws, --write-to-stdout
	      Writes 16 bit little endian to stdout. (the --format option, the --mp3 option, and some others have no effect using this option)

       -dm, --disable-meter
	      Disable console meter

       -hbu, --hide-buffer-usage
	      Disable buffer usage.

       -dc, --disable-console
	      Disable console updates. Same as "-dm -hbu".

       -lm, --linear-meter
	      Use linear scale for the console meter (default is dB scale)

       -dBr, --dB-meter-reference
	      Specify reference level for dB meter. (default=0)

       -mb, --meterbridge
	      Start up meterbridge to monitor recorded sound.

       -mt, --meterbridge-type
	      Specify type. vu (default), ppm, dpm, jf or sco.

       -mr, --meterbridge-reference
	      Specify reference level for meterbidge.

       -jt, --jack-transport
	      Start program, but do not start recording until jack transport has started rolling. When jack  transport	stops,	the  recording	is
	      stopped, and the program ends.

       -jtm, --jack-transport-multi
	      Similar  to  --jack-transport,  but  do not end program when jack transport stops. Instead, record to a new file when jack_transport
	      start rolling again. (not implemented yet)

       -B, --bufsize s
	      Initial/minimum buffer size in seconds. Default is 8 seconds for mp3 files, and 4 seconds for all other formats.

       -MB, --maxbufsize
	      Maximum buffer size in seconds. jack_capture will allocate. Default is 40. (Buffer is automatically increased during

       -fn, --filename
	      Specify filename. (It's usually easier to set last argument instead)

EXAMPLES

       jack_capture [--bitdepth n] [--channels n] [--port port] [filename]

       jack_capture [-b n] [-c n] [-p port] [filename]

       jack_capture
	      To record a stereo file of what you hear.

       ack_capture -f flac
	      To record a stereo file of what you hear in the flac format.

       jack_capture -f ogg
	      To record a stereo file of what you hear in the ogg format.

       jack_capture -mp3
	      To record a stereo file of what you hear in the mp3 format.

       jack_capture --channels 2 --port system:playback*
	      To record a stereo file of what you hear in the wav format.

       jack_capture --port jamin:out* sound_from_jamin.wav
	      To record the output from jamin.

       jack_capture --port jamin:in* sound_to_jamin.wav
	      To record all sound coming in to jamin.

       jack_capture --port jamin* sound_to_and_from_jamin.wav
	      To record all sound coming in and out of jamin.

       jack_capture -c 2 -p system:capture*
	      To record a stereo file from the soundcard.

SEE ALSO

       jackd(1).

AUTHOR

       jack_capture was written by Kjetil Matheussen

       This manual page was written by Jaromir Mike <mira.mikes@seznam.cz>, for the Debian project (but may be used by others).

								   July 28, 2010						   JACK_CAPTURE(1)