How to set the audio bitrate in getusermedia?

2 years ago
Isabella Edwards
1 minute

When using getUserMedia to obtain an audio stream, you can specify audio parameters, such as bitrate, through the constraints parameter.

To set the bitrate of the audio, you can use the bitrate property of the MediaTrackConstraints object and set it to the desired bitrate value. Here is an example code:

const constraints = {
  audio: {
    bitrate: 128000, // 设置音频码率为128kbps
  }
};

navigator.mediaDevices.getUserMedia(constraints)
  .then(function(stream) {
    // 成功获取音频流
  })
  .catch(function(error) {
    // 处理错误
  });

The constraints object in the above code contains an audio property to configure audio parameters. Specifically, the bitrate property is used to set the audio bitrate, with a value of 128000 representing a bitrate of 128kbps for the audio.

Please note that different browsers may vary in their support for getUserMedia, with some browsers potentially ignoring or not supporting certain audio parameters. Therefore, the final audio bitrate may be limited by the browser.

Additionally, it should be noted that setting the audio bitrate may require user authorization. Therefore, when calling the getUserMedia method, the browser may prompt a permission request dialog, asking the user if they allow the use of the microphone device.

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