Login or Register to Ask a Question and Join Our Community

Linux and UNIX Man Pages

Linux & Unix Commands - Search Man Pages

jack-stdin(1) [debian man page]

JACK-STDIN(1)						      General Commands Manual						     JACK-STDIN(1)

NAME

       jack-stdin - write JACK audio data to stdin

SYNOPSIS

       jack-stdin [OPTIONS] port1 [ port2 ...]

DESCRIPTION

       jack-stdin reads raw audio data from standard-input and writes it to a JACK audio port.

       The  number  of given ports detemine the number of audio channels that are used.  If more than one channel is given, the input audio-sample
       data needs to be interleaved.

OPTIONS

       -b, --bitdepth BITS
	      Specify the bit-depth of each sample. For integer-encoding this can be 16 or 24.	The default is 16.  This setting is only used  for
	      integer encoding: Floating-point samples will always be 32 bit wide.

       -d, --duration SEC
	      Specify  the time for which jack-stdin should run in seconds.  A value less than 1 means to run indefinitely. The default is 0 which
	      reads until end-of-file.

       -e, --encoding FORMAT
	      Set the input format of the data: signed-integer, unsigned-integer, floating-point (default: signed)

       -f, --file FILENAME
	      Read data from given file instead of standard-input.

       -h, --help
	      Print a brief usage information

       -p, --prebuffer PERCENT
	      Pre-fill the buffer before starting audio output to JACK (default 50.0%).  NOTE: disable pre-buffering (-p 0) or use a small  buffer
	      size to play back very short samples.

       -L, --little-endian
	      The input-data is in little-endian byte-order or native-byte-order float (this is the default)

       -B, --big-endian
	      Interpret input audio data in big-endian byte-order or swap the byte-order of floating-point.

       -q, --quiet
	      Inhibit usual output.  This affects information and buffer-overflow warnings but not setup-errors.

       -S, --bufsize SAMPLES
	      Choose the internal buffer-size in samples. The default size is 65536.  The given value will be multiplied by the number of channels
	      and bit-depth to get the size of the ring-buffer.  Note: the buffersize must be larger than JACK's period size.

EXAMPLES

	 jack-stdout vlc_31994:out_1 vlc_31994:out_2 
	    | sox -t raw -r 48k -e signed -b 16 -c 2 - 
		  -t raw -r 48k -e signed -b 16 -c 2 - 
	       tremolo 5 100 
	    | ./jack-stdin system:playback_1 system:playback_2

	 cat /dev/dsp 
	    | jack-stdin system:playback_1 system:playback_2

KNOWN ISSUES

       jack-stdin is not suitable to play-back files shorter than twice the jack-period size.

AUTHOR

       Robin Gareus <robin@gareus.org>.

SEE ALSO

       http://jackaudio.org/,

								   30 March 2011						     JACK-STDIN(1)

Check Out this Related Man Page

JACK_NETSOURCE(1)					      General Commands Manual						 JACK_NETSOURCE(1)

NAME

       jack_netsource - Netjack Master client for one slave

SYNOPSIS

       jack_netsource [ -H hostname ] [ options ]

DESCRIPTION

       jack_netsource The Master side of a netjack connection. Represents the slave jackd -dnet in the master jack graph.  Most connection parame-
       ters are configured via the netsource, and the slave will set itself up according to the commandline option given to jack_netsource.
       Netjack allows low latency audio connections over general IP networks. When using celt for compression, it is even  possible  to  establish
       transatlantic links, with latencies not much over the actual ping time.
       But the main usecase is of course a LAN, where it can achieve one jack period of latency.

OPTIONS

       -h this help text

       -H slave host
	      Host name of the slave JACK

       -o num channels
	      Number of audio playback channels

       -i num channels
	      Number of audio capture channels

       -O num channels
	      Number of midi playback channels

       -I num channels
	      Number of midi capture channels

       -n periods
	      Network latency in JACK periods

       -p port
	      UDP port that the slave is listening on

       -r reply port
	      UDP port that we are listening on

       -B bind port
	      reply port, for use in NAT environments

       -b bitdepth
	      Set transport to use 16bit or 8bit

       -c bytes
	      Use CELT encoding with <bytes> per period and channel

       -m mtu
	      Assume this mtu for the link

       -R N
	      Redundancy: send out packets N times.

       -e
	      skip host-to-network endianness conversion

       -N jack name
	      Reports a different client name to jack

       -s, --server servername
	      Connect to the jack server named servername

       -h, --help
	      Display help/usage message

       -v, --version
	      Output version information and exit

EXAMPLES

       run a 4 audio channel bidirectional link with one period of latency and no midi channels. Audio data is flowing uncompressed over the wire:
       On hostA:

	      jackd -d alsa
	      jack_netsource -H hostB -n1 -i4 -o4 -I0 -O0

       On hostB:

	      jackd -d net

0-122-0 							  September 2012						 JACK_NETSOURCE(1)
Man Page