如何为 opentok 中的每个流获取麦克风 activity

Question

我有关于如何使用 OpenTok 为每个流获取麦克风 activity 的问题。为此，我正在与 PHP 和 OpenTok.js 合作。

这是我当前的代码。

    ......
        var subscribers;

        session.on("streamCreated", function(event) {
           var subscriber = session.subscribe(event.stream, 'elementId', {
              insertMode: 'append',
              width: 100%,
              height: 100%
           })
           subscribers[subscriber.id] = subscriber;
           for(var user in subscribers) {
              console.log(subscribers[user].getAudioVolume());
           }
        });

..........

我这样试过，结果总是100。

谁能解决这个问题？请帮我。尤里

Answer 1

var movingAvg = null;
subscriber.on('audioLevelUpdated', function(event) {
  if (movingAvg === null || movingAvg <= event.audioLevel) {
movingAvg = event.audioLevel;
  } else {
movingAvg = 0.7 * movingAvg + 0.3 * event.audioLevel;
  }

  // 1.5 scaling to map the -30 - 0 dBm range to [0,1]
  var logLevel = (Math.log(movingAvg) / Math.LN10) / 1.5 + 1;
  logLevel = Math.min(Math.max(logLevel, 0), 1);
  document.getElementById('subscriberMeter').value = logLevel;
});

如何为 opentok 中的每个流获取麦克风 activity

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