如何将WebRTC本地视频流录制到Android上的文件中？

Question

我已经在使用WebRTC了。我想要本地视频流到文件。如果你能给我一个提示，我将不胜感激。

感谢您的阅读。

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    //sigConnect("http://10.54.36.19:8000/");
    sigConnect("http://unwebrtc.herokuapp.com/");
    initWebRTC();

    Log.i(TAG, "VideoCapturerAndroid.getDeviceCount() = " + VideoCapturerAndroid.getDeviceCount());
    String nameOfFrontFacingDevice = VideoCapturerAndroid.getNameOfFrontFacingDevice();
    String nameOfBackFacingDevice = VideoCapturerAndroid.getNameOfBackFacingDevice();
    Log.i(TAG, "VideoCapturerAndroid.getNameOfFrontFacingDevice() = " + nameOfFrontFacingDevice);
    Log.i(TAG, "VideoCapturerAndroid.getNameOfBackFacingDevice() = " + nameOfBackFacingDevice);
    VideoCapturerAndroid capturer = VideoCapturerAndroid.create(nameOfFrontFacingDevice);

    MediaConstraints videoConstraints = new MediaConstraints();

    VideoSource videoSource = peerConnectionFactory.createVideoSource(capturer, videoConstraints);
    localVideoTrack = peerConnectionFactory.createVideoTrack(VIDEO_TRACK_ID, videoSource);

    glview = (GLSurfaceView) findViewById(R.id.glview);
    VideoRendererGui.setView(glview, null);
    try {
        rendereRemote = VideoRendererGui.createGui(0, 0, 100, 100, VideoRendererGui.ScalingType.SCALE_ASPECT_FILL, true);
        rendereLocal = VideoRendererGui.createGui(72, 72, 25, 25, VideoRendererGui.ScalingType.SCALE_ASPECT_FILL, true);
        localVideoTrack.addRenderer(rendereLocal);
    } catch (Exception e) {
        e.printStackTrace();
    }

    mediaStream = peerConnectionFactory.createLocalMediaStream(LOCAL_MEDIA_STREAM_ID);
    mediaStream.addTrack(localVideoTrack);

}

Answer 1

Libjingle库使用GlSurfaceView来渲染视频。您可以尝试使用FFMPEG库保存该视图中的视频帧。但对音频不太确定

Answer 2

您必须创建视频容器，如mp4，并手动编码和写入每个原始帧。此外，最新的webrtc版本还提供了从麦克风录制音频的通道。还应该对音频样本进行编码和多路复用。

有关访问远程和本地对等设备的原始视频帧的

• ，请参见接口VideoSink。apprtc/CallActivity.java类ProxyVideoSink)
• For获取音频示例请参见RecordedAudioToFileController
• For类创建/复用视频文件您可以使用Android SDK中的MediaMuxer类。