stdin2wav

tee for audio streams: pass stream from stdin, e.g. rtl_fm, to stdout and save into .wav file(s)

it's a quick hack, i'm using in combination with rtl_fm (of librtlsdr) and it's squelch option.
squelch: when signal level is below the threshold, rtl_fm does stop streaming to stdout. ideally the transmission has ended.
here comes stdin2wav, which realizes the stopped stream (after the timeout) and closes the .wav file.

usage

stdin2wav [ <srate> [<nchan> [ <limit> [<stop|cont> [<timeout> [<filename>] ] ] ] ] ]

• filename: where to save each stream
  might contain strftime format specifier
  using default: '%Y%m%d_%H%M%S_%Z.wav'
• srate: sample rate of stream. default: 24000
• nchan: number of channels in stream. default: 1
• limit: limit file length in seconds. default: 0
• stop/cont: after limit: continue or stop recording. default: 'cont'
• timeout: timeout in sec to close file. default: 1

source

https://github.com/hayguen/stdin2wav

compilation

for compilation just hit 'make'.
besides gcc and make, libsndfile is required.
on debian try 'sudo apt-get install libsndfile-dev'

license

BSD

author

Hayati Ayguen h_ayguen@web.de