CameraCapturer在调用startCapture之前必须初始化

huangapple
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英文:

CameraCapturer must be initialized before calling startCapture

问题

在在Android中实现WebRTC时遇到以下问题：

> Caused by: java.lang.RuntimeException: 在调用startCapture之前，必须初始化CameraCapturer。

build.gradle(:app)

  1. dependencies {
  2.   ......
  3.   implementation 'org.webrtc:google-webrtc:1.0.+'
  4.   ......
  5. }

// 导致问题的代码块：

  1. private void getVideoSource() {
  2.     // isScreenCast = false
  3.     videoSource = peerConnectionFactory.createVideoSource(false);
  4.     surfaceTextureHelper = SurfaceTextureHelper.create(Thread.currentThread().getName(), rootEglBase.getEglBaseContext());
  5.     VideoCapturer videoCapturer = createCameraCapturer(new Camera1Enumerator(false));
  6.     localVideoTrack = peerConnectionFactory.createVideoTrack("200", videoSource);
  7.     localVideoTrack.addSink(local_renderer);
  8.     if(videoCapturer != null)
  9.         videoCapturer.startCapture(1000, 1000, 30); // <- 异常出现在这里
  10.     
  11. }

CameraCapturer已被弃用。现在有Camera1Capturer可用。

英文:

Facing this issue while implementing WebRTC in Android:

> Caused by: java.lang.RuntimeException: CameraCapturer must be initialized before calling startCapture.

build.gradle(:app)

  1. dependencies {
  2.   ......
  3.   implementation 'org.webrtc:google-webrtc:1.0.+'
  4.   ......
  5. }

// Chunk causing problem:

  1. private void getVideoSource() {
  2.     // isScreenCast = false
  3.     videoSource = peerConnectionFactory.createVideoSource(false);
  4.     surfaceTextureHelper = SurfaceTextureHelper.create(Thread.currentThread().getName(), rootEglBase.getEglBaseContext());
  5.     VideoCapturer videoCapturer = createCameraCapturer(new Camera1Enumerator(false));
  6.     localVideoTrack = peerConnectionFactory.createVideoTrack("200", videoSource);
  7.     localVideoTrack.addSink(local_renderer);
  8.     if(videoCapturer != null)
  9.         videoCapturer.startCapture(1000,1000,30); // <- Here is the Exception
  10.     
  11. }

CameraCapturer is deprecated. There is Camera1Capturer now available.

答案1

得分: 3

  1. > 在使用之前，您需要进行初始化
  3. private void getVideoSource() {
  4.     VideoCapturer videoCapturer = createVideoCapturer();
  5.     VideoSource videoSource;
  6.     // 创建一个VideoSource实例
  7.     if (videoCapturer != null) {
  8.         SurfaceTextureHelper surfaceTextureHelper = SurfaceTextureHelper.create("CaptureThread", rootEglBase.getEglBaseContext());
  9.         videoSource = factory.createVideoSource(videoCapturer.isScreencast());
  10.         videoCapturer.initialize(surfaceTextureHelper, this, videoSource.getCapturerObserver());
  11.     }
  12.    
  13.     localVideoTrack = factory.createVideoTrack("100", videoSource);
  15.     // 创建MediaConstraints - 用于指定视频和音频约束
  16.     audioConstraints = new MediaConstraints();
  17.     videoConstraints = new MediaConstraints();
  19.     // 创建一个AudioSource实例
  20.     audioSource = factory.createAudioSource(audioConstraints);
  21.     localAudioTrack = factory.createAudioTrack("101", audioSource);
  23.     if (videoCapturer != null) {
  24.         videoCapturer.startCapture(1024, 720, 30);
  25.     }
  26.     binding.localGlSurfaceView.setVisibility(View.VISIBLE);
  27.     // 最后，当我们的VideoRenderer准备好后，
  28.     // 可以将我们的渲染器添加到VideoTrack中。
  29.     localVideoTrack.addSink(binding.localGlSurfaceView);
  30. }
英文:

> You need to initialise before you use it

  1.  private void getVideoSource() {
  2.     VideoCapturer videoCapturer = createVideoCapturer();
  3.     VideoSource videoSource;
  4.     //Create a VideoSource instance
  5.     if (videoCapturer != null) {
  6.         SurfaceTextureHelper surfaceTextureHelper = SurfaceTextureHelper.create("CaptureThread", rootEglBase.getEglBaseContext());
  7.         videoSource = factory.createVideoSource(videoCapturer.isScreencast());
  8.         videoCapturer.initialize(surfaceTextureHelper, this, videoSource.getCapturerObserver());
  9.     }
  10.    
  12.     localVideoTrack = factory.createVideoTrack("100", videoSource);
  14.     //Create MediaConstraints - Will be useful for specifying video and audio constraints.
  15.     audioConstraints = new MediaConstraints();
  16.     videoConstraints = new MediaConstraints();
  18.     //create an AudioSource instance
  19.     audioSource = factory.createAudioSource(audioConstraints);
  20.     localAudioTrack = factory.createAudioTrack("101", audioSource);
  22.     if (videoCapturer != null) {
  23.         videoCapturer.startCapture(1024, 720, 30);
  24.     }
  25.     binding.localGlSurfaceView.setVisibility(View.VISIBLE);
  26.     // And finally, with our VideoRenderer ready, we
  27.     // can add our renderer to the VideoTrack.
  28.     localVideoTrack.addSink(binding.localGlSurfaceView);
  29. }

huangapple
  • 本文由 发表于 2020年4月10日 17:14:10
  • 转载请务必保留本文链接：https://go.coder-hub.com/61137244.html
  • android
  • java
  • webrtc
  • webrtc-android
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