sox is probably the one linux program that continues to frustrate me. At the same time, I am awed by what it can do, and I'd like to get close to being fluent in it, if not mastering it.
Today, I've spent about 2 hours trying to get
sox to read bytes from
parec via a pipe.
parec bytes are a
pulseaudio "sink". In order to get them flowing through the pipe, I used this answer from askubuntu.
This is the command I've been using:
$ parec -d telephonControl.monitor | sox -b 16 -e signed -c 2 -r 44100 - -t pulse hmm.ogg silence 1 0.50 0.1% 1 2.0 0.1% : newfile : restart
and this is the error I get:
sox FAIL formats: can't determine type of `-' write() failed: Broken pipe
What's more, oggenc parses them just fine:
parec -d telephonControl.monitor | oggenc -b 192 -o telephonControl.ogg --raw - Encoding standard input to "telephonControl.ogg" at approximate bitrate 192 kbps (VBR encoding enabled)
I have absolutely no idea how to make
sox digest those bytes.
$ parec -d telephonControl.monitor >> somebytes $ soxi somebytes soxi FAIL formats: can't determine type of file `somebytes'
But I do know that they are raw audio, 16 bit signed little endian, 2 channel 44100kHz:
$pacmd >>> list-sink-inputs 1 sink input(s) available. index: 17 driver: <protocol-native.c> flags: state: RUNNING sink: 2 <telephonControl> volume: 0: 100% 1: 100% 0: 0.00 dB 1: 0.00 dB balance 0.00 muted: no current latency: 92.86 ms requested latency: 23.20 ms sample spec: s16le 2ch 44100Hz channel map: front-left,front-right Stereo resample method: (null) module: 7 client: 53 <ALSA plug-in> properties: media.name = "ALSA Playback" application.name = "ALSA plug-in" native-protocol.peer = "UNIX socket client" native-protocol.version = "26" application.process.id = "3609" application.process.user = "alec" application.process.host = "ROOROO" window.x11.display = ":0" application.language = "en_GB.UTF-8" application.process.machine_id = "eec7c6ae60f90bb3921ad16d0000302d" application.process.session_id = "eec7c6ae60f90bb3921ad16d0000302d-1345384044.64188-1149507345" module-stream-restore.id = "sink-input-by-application-name:ALSA plug-in"