Java 在调用startCapture之前，必须初始化CameraCapturer

在Android中实施WebRTC时面临此问题：

原因：java.lang.RuntimeException:CameraCapturer必须在调用startCapture之前初始化

build.gradle（：app）

//导致问题的块：

private void getVideoSource() {
    // isScreenCast = false
    videoSource = peerConnectionFactory.createVideoSource(false);
    surfaceTextureHelper = SurfaceTextureHelper.create(Thread.currentThread().getName(), rootEglBase.getEglBaseContext());
    VideoCapturer videoCapturer = createCameraCapturer(new Camera1Enumerator(false));
    localVideoTrack = peerConnectionFactory.createVideoTrack("200", videoSource);
    localVideoTrack.addSink(local_renderer);
    if(videoCapturer != null)
        videoCapturer.startCapture(1000,1000,30); // <- Here is the Exception

}

private void getVideoSource（）{
//isScreenCast=假
videoSource=peerConnectionFactory.createVideoSource（false）；
surfaceTextureHelper=surfaceTextureHelper.create（Thread.currentThread（）.getName（），rootEglBase.getEglBaseContext（））；
VideoCapturer VideoCapturer=createCameraCapturer（新的Camera1分子（false））；
localVideoTrack=peerConnectionFactory.createVideoTrack（“200”，视频源）；
localVideoTrack.addSink（本地_渲染器）；
if（videoCapturer！=null）
videoCapturer.startCapture（10001000,30）；//
你需要在使用它之前进行初始化

谢谢。你能告诉我如何使用设备的公共IP地址吗（假设我是从STUN服务器上得到的）并将其保存在
SessionDescription
？还没有…我仍在思考如何在不涉及任何服务器的情况下进行简单的P2P视频聊天。虽然我正在使用Firebase消息发送报价和答复。但这还没有完成。好的，让我分享一些代码。我将分享你的github链接。我最近做了这项工作。我们有一个公共服务谢谢！非常感谢你需要帮助
private void getVideoSource() {
    // isScreenCast = false
    videoSource = peerConnectionFactory.createVideoSource(false);
    surfaceTextureHelper = SurfaceTextureHelper.create(Thread.currentThread().getName(), rootEglBase.getEglBaseContext());
    VideoCapturer videoCapturer = createCameraCapturer(new Camera1Enumerator(false));
    localVideoTrack = peerConnectionFactory.createVideoTrack("200", videoSource);
    localVideoTrack.addSink(local_renderer);
    if(videoCapturer != null)
        videoCapturer.startCapture(1000,1000,30); // <- Here is the Exception

}

 private void getVideoSource() {
    VideoCapturer videoCapturer = createVideoCapturer();
    VideoSource videoSource;
    //Create a VideoSource instance
    if (videoCapturer != null) {
        SurfaceTextureHelper surfaceTextureHelper = SurfaceTextureHelper.create("CaptureThread", rootEglBase.getEglBaseContext());
        videoSource = factory.createVideoSource(videoCapturer.isScreencast());
        videoCapturer.initialize(surfaceTextureHelper, this, videoSource.getCapturerObserver());
    }
   

    localVideoTrack = factory.createVideoTrack("100", videoSource);

    //Create MediaConstraints - Will be useful for specifying video and audio constraints.
    audioConstraints = new MediaConstraints();
    videoConstraints = new MediaConstraints();

    //create an AudioSource instance
    audioSource = factory.createAudioSource(audioConstraints);
    localAudioTrack = factory.createAudioTrack("101", audioSource);

    if (videoCapturer != null) {
        videoCapturer.startCapture(1024, 720, 30);
    }
    binding.localGlSurfaceView.setVisibility(View.VISIBLE);
    // And finally, with our VideoRenderer ready, we
    // can add our renderer to the VideoTrack.
    localVideoTrack.addSink(binding.localGlSurfaceView);
}