java - 如何在 Webrtc 中增加音量输出

Question

我正在开发一个 webrtc android 应用程序，除了两件事之外，一切都运行良好……它们是；

1. 将默认声音输出设备从听筒切换到扬声器，反之亦然。我尝试使用此 stackoverflow 线程中的以下代码，但它们不起作用

audioManager = (AudioManager) this.activity.getSystemService(Context.AUDIO_SERVICE);
audioManager.setSpeakerphoneOn(true);
audioManager.setMode(AudioManager.MODE_IN_COMMUNICATION);

2. 并且提高视频性能，视频流有很多滞后，甚至流挂起很多。如果有任何人可以在这方面帮助我，非常感谢。下面是我的 peerConnection 配置

String fieldTrials = (PeerConnectionFactory.VIDEO_FRAME_EMIT_TRIAL + "/" + PeerConnectionFactory.TRIAL_ENABLED + "/");
PeerConnectionFactory.InitializationOptions initializationOptions =
                PeerConnectionFactory.InitializationOptions.builder(this)
                        .setFieldTrials(fieldTrials)
                        .createInitializationOptions();
PeerConnectionFactory.initialize(initializationOptions);

//Create a new PeerConnectionFactory instance - using Hardware encoder and decoder.
PeerConnectionFactory.Options options = new PeerConnectionFactory.Options();
DefaultVideoEncoderFactory defaultVideoEncoderFactory = new DefaultVideoEncoderFactory(
                rootEglBase.getEglBaseContext(),  /* enableIntelVp8Encoder */true,  /* enableH264HighProfile */true);
DefaultVideoDecoderFactory defaultVideoDecoderFactory = new DefaultVideoDecoderFactory(rootEglBase.getEglBaseContext());

peerConnectionFactory = PeerConnectionFactory.builder()
                .setOptions(options)
                .setVideoEncoderFactory(defaultVideoEncoderFactory)
                .setVideoDecoderFactory(defaultVideoDecoderFactory)
                .createPeerConnectionFactory();

谢谢

Answer 1

需要在清单中添加此权限

<uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS"/>