javascript - Android 移动浏览器 - navigator.mediaDevices.enumerateDevices 方法返回交换的音频输入和输出设备值

Question

我正在使用导航器功能 -navigator.mediaDevices.enumerateDevices()在我的移动浏览器应用程序中获取媒体设备列表。我正在使用以下代码：

navigator.mediaDevices.enumerateDevices().then(function(devices) {
 console.log("devices", devices);
});

我将音频输入和音频输出设备对象值交换如下：

[
  {
    "deviceId": "default",
    "kind": "audioinput",
    "label": "Default",
    "groupId": "41a111f571a1171ca91c5428d2ad8806a66bb6d7c5812f779161151a706641a1"
  },
  {
    "deviceId": "bbf2c347dbfc70b9e37b16be622c4973a74269c7f53d4162adab0c09614514d1",
    "kind": "audioinput",
    "label": "Speakerphone",
    "groupId": "e8dc20cc0a8dd33f65085c2f06bb8424105eb230c54237c343b8f8ff960559f3"
  },
  {
    "deviceId": "704cd1e8449390f5bb3fd1615a7637753f4ad019d4e6bb3f7c36690f58f2536d",
    "kind": "audioinput",
    "label": "Headset earpiece",
    "groupId": "1f2f370cbbe3f57fe3a8e901dc8f82c8d751f690520c261b293b1480e7959218"
  },
  {
    "deviceId": "38f008a97b8fd5ff8d367c336fcb7120fdc499375fb44459980d60395516b955",
    "kind": "videoinput",
    "label": "camera2 1, facing front",
    "groupId": "3b073bb17b0c56c5f8e6f143d6eeebcbfac5ec2ebc8ff2bc852f66745a63c591"
  },
  {
    "deviceId": "bbf2c347dbfc70b9e37b16be622c4973a74269c7f53d4162adab0c09614514d1",
    "kind": "videoinput",
    "label": "camera2 0, facing back",
    "groupId": "5a8b08633d9b089d234fc7bb0d67fae394e90a4f7948128562251d17408d99d4"
  },
  {
    "deviceId": "default",
    "kind": "audiooutput",
    "label": "Default",
    "groupId": "default"
  }
]

我已经在其他三个 android 移动浏览器中尝试过这个，它也在交换这些设备中的值。在PC上它工作正常。为什么它在移动浏览器中交换这些值？

另外，我检查了这个网页以验证 - webrtc 输入输出设备，这里它在音频输入设备列表中显示扬声器，如下面的屏幕截图所示。

标签： javascriptandroidgoogle-chromewebrtcmobile-development