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• Trying to produce a stream of OGG encoded audio originating from microphone yields a completely quiet file

  3 décembre 2019, par Dan

  Basically title. I want to produce a constant stream of audio data encoded in OGG coming from my microphone. This is my current setup :

  var mic = require('mic');
  
  var fs = require('fs');
  
  var { exec } = require('child_process')
  
  
  
  var micInstance = mic({
  
      rate: '44100',
  
      channels: '1',
  
      debug: true,
  
      exitOnSilence: 0,
  
      device: 'pulse',
  
  
  
  });
  
  
  
  var micInputStream = micInstance.getAudioStream(); 
  
  var outputFileStream = fs.createWriteStream('output.final.ogg');
  
  var transcode = exec('ffmpeg -loglevel panic -i pipe: -f ogg -')
  
  
  
  micInputStream.pipe(transcode.stdin)
  
  transcode.stdout.pipe(outputFileStream)

  When I pipe micInputStream directly to process.stdout then use a unix pipe to pipe the data to a output.wav file, I can play it back.

  When I pipe micInputStream directly to process.stdout then use a unix pipe to pipe the data to ffmpeg, then unix-pipe all that data into a output.ogg file, I can also play it back.

  But when I try my code, I get an OGG file, but when I play it back, it’s quiet.

  I’m at a loss, how do I just create a readableStream containing an endless stream of audio coming from the mic, encoded in OGG ?

• Bash script : Cycle script until ffmpeg command restarts successfully

  13 août 2023, par Bellacoda

  I have a IP Camera and the recordings are saved with ffmpeg RTSP into a raspberry pi.

  


  Sometimes, when the electricity shuts off and comes back on, the raspberry boots faster than the IP Camera and the ffmpeg command (saved on a crontab to run every reboot) fails to execute because it can't reach the IP Camera (that is still turning on).

  


  I tried to put a sleep command before the command but that doesn't work either.

  


  It also happened that when the IP Camera reboots, the raspberry closes the command, but when the camera comes back online, I have to manually lauch the command.

  


  Is there a way to make a script that waits to run the ffmpeg command until the camera is fully online (I assume with the $ ? variable for command exit status), and to wait to restart the ffmpeg command when the camera reboots ?

  


  The setup I have now is a crontab :
SHELL=/bin/bash
@reboot sleep 120s ; sudo ffmpeg ...

  


• grab realtime audio from Java and Stream to RTMP (via xuggler)

  13 octobre 2011, par Jhonny Everson

  I am trying to stream audio from microphone a rtmp (red5) server via xuggle. I found some code from users that could not get it working, but not a working example.

  Can someone point the directions on how get data from microphone and package into rtmp with xuggle in realtime ?

  I'm getting stuck at first frame.