如何在javascript中捕获音频？

我目前正在使用getUserMedia(),它只适用于Firefox和Chrome,但它已被弃用,仅适用于https(在Chrome中).有没有其他/更好的方法来获得适用于所有平台的javascript中的语音输入？

例如. web.whatsapp.com app等网站如何录制音频？ getUserMedia()提示第一次用户允许录音,而Whatsapp应用程序不需要用户的许可.

我目前使用的getUserMedia()如下所示：

navigator.getUserMedia(
    {
        "audio": {
            "mandatory": {
                "googEchoCancellation": "false",
                "googAutoGainControl": "false",
                "googNoiseSuppression": "false",
                "googHighpassFilter": "false"
            },
            "optional": []
        },
    }, gotStream, function(e) {
        console.log(e);
    });

解决方法:

Chrome 60执行require using https,因为getUserMedia是一个功能强大的feature.API访问不应该在非安全域中工作,因为该API访问可能会流向非安全的actor.不过,Firefox仍支持getUserMedia over http.

我一直在使用RecorderJS,它很好地满足了我的目的.
这是一个代码示例. (source)

function RecordAudio(stream, cfg) {

  var config = cfg || {};
  var bufferLen = config.bufferLen || 4096;
  var numChannels = config.numChannels || 2;
  this.context = stream.context;
  var recordBuffers = [];
  var recording = false;
  this.node = (this.context.createScriptProcessor ||
    this.context.createJavaScriptNode).call(this.context,
    bufferLen, numChannels, numChannels);

  stream.connect(this.node);
  this.node.connect(this.context.destination);

  this.node.onaudioprocess = function(e) {
    if (!recording) return;
    for (var i = 0; i < numChannels; i++) {
      if (!recordBuffers[i]) recordBuffers[i] = [];
      recordBuffers[i].push.apply(recordBuffers[i], e.inputBuffer.getChannelData(i));
    }
  }

  this.getData = function() {
    var tmp = recordBuffers;
    recordBuffers = [];
    return tmp; // returns an array of array containing data from various channels
  };

  this.start() = function() {
    recording = true;
  };

  this.stop() = function() {
    recording = false;
  };
}

用法很简单：

var recorder = new RecordAudio(userMedia);
recorder.start();
recorder.stop();
var recordedData = recorder.getData()

编辑：如果没有任何效果,您可能还想检查此answer.

标签：javascript,audio,speech,getusermedia,voice-recording
来源： https://codeday.me/bug/20190930/1834807.html