android + red5 + rtmp

背景:在已有的red5服务器环境下实现android客户端的视频直播

要实现客户端视频直播就先先对服务器端有所了解

Red5流媒体服务器是Adboe的产品,免费并且是开源的，与Flash搭配的时候可谓是天生一对，但使用Java和Android作为客户端调用却可谓一波三折。
Red5是一个采用Java开发开源的Flash流媒体服务器。它支持：把音频（MP3）和视频（FLV）转换成播放流； 录制客户端播放流（只支持FLV）；共享对象；现场直播流发布；远程调用。Red5使用RSTP作为流媒体传输协议，在其自带的一些示例中演示了在线录制，flash流媒体播放，在线聊天，视频会议等一些基本功能。

服务器的相关配置

 <context-param>
       <param-name>webAppRootKey</param-name>
       <param-value>/FlashMediaGateway</param-value>
 </context-param>

[root@lapaccweb WEB-INF]# more red5-web.properties 
webapp.contextPath=/FlashMediaGateway
webapp.virtualHosts=*:1935,*:443
recordPath=/opt/Avaya/AccWeb/data/SessionRecording/
playbackPath=/opt/Avaya/AccWeb/data/SessionRecording/
absolutePath=true

Adobe的Red5源代码里有一个RTMPClient的类，这个类在使用上其实不复杂，但却没办法成功调用。观察日志，发现是连接成功后在开始创建流的时候，服务端把连接断开了。我能想到的解释就是可能公司现在所使用的Red5服务器的版本与这个RTMPClient不兼容。

国外还有一个收费的RTMPClient，价值是395刀。具体网址和产品的名称我就不指出了，有心人肯定会找得到。这个客户端类库很强大，使用也很方便，我注册了一个试用的key，发现能和Red5服务器成功连接并且通讯良好。(国内有破解版)

之前用vlc和Vitamio尝试过,结果播放不了直播流,可能是我太笨了吧.
有可能的原因如下:
http://blog.csdn.net/qiuchangyong/article/details/18862247

利用LocalServerSocket采集视频数据的实时流数据，android自带的LocalServerSocket是和java 的serverSocket是不同的，因为LocalServerSocket的客户端和服务端都是必须在本机，所以我们可以在调用RecodMedia录制视频的时候建立客户端LocalSocket来向服务端发送数据，在服务端接收数据调用juv—rtmp—client将接收的数据打包成RTMP协议数据向流媒体服务器发送数据。
利用android自带的Camera来录制数据，这里主要用到了照相机的CallBack回调接口，在这个回调接口里面可以实时的接收照相机录制的视频数据，这里面录制的视频数据是YUV420SP格式的数据流，这是最原始的数据流，是无法显示的服务器界面的。将数据流转化成YUV420SP2RGB格式的数据，然后利用juv—rtmp—client向流媒体服务器发送数据。

juv—rtmp—client这个jar包封装了很多和流媒体服务器交互的方法，当然有视频数据传输格式。在流媒体服务提供了三种格式的传输方式：Record、Live、Append。

利用juv—rtmp—client有几个主要的类

其中最重要的几个类是NetConnection,NetStream, License，其中NetConnection,NetStream这两个类是负责创建连接和回调服务端的数据。而License则顾名思义是负责验证有没有授权。由于按照官方给出的使用说明，在使用前必须调用License.setKey()方法传入注册所得到的key。

CameraVideoActivity

	private void init() {
		aCamera = new AndroidCamera(CameraVideoActivity.this);
		hour = (TextView) findViewById(R.id.mediarecorder_TextView01);
		minute = (TextView) findViewById(R.id.mediarecorder_TextView03);
		second = (TextView) findViewById(R.id.mediarecorder_TextView05);
		mStart = (Button) findViewById(R.id.mediarecorder_VideoStartBtn);
		mStop = (Button) findViewById(R.id.mediarecorder_VideoStopBtn);
		mReturn = (Button) findViewById(R.id.mediarecorder_VideoReturnBtn);
		// 开始录像
		mStart.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View v) {
				// TODO Auto-generated method stub
				if (streaming == false) {
					aCamera.start();
				}
				aCamera.startVideo();
				isTiming = true;
				handler.postDelayed(task, 1000);
				// 设置按钮状态
				mStart.setEnabled(false);
				mReturn.setEnabled(false);
				mStop.setEnabled(true);
			}
		});
		mReturn.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View v) {
				// TODO Auto-generated method stub
				if (RTMPConnectionUtil.netStream != null) {
					RTMPConnectionUtil.netStream.close();
					RTMPConnectionUtil.netStream = null;
				}
				if (aCamera != null) {
					aCamera = null;

				}
				finish();
			}
		});
		mStop.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View v) {
				// TODO Auto-generated method stub
				aCamera.stop();
				// 设置按钮状态
				mStart.setEnabled(true);
				mReturn.setEnabled(true);
				mStop.setEnabled(false);
				isTiming = false;
			}
		});
	}

	public class AndroidCamera extends AbstractCamera implements
			SurfaceHolder.Callback, Camera.PreviewCallback {

		private SurfaceView surfaceView;
		private SurfaceHolder surfaceHolder;
		private Camera camera;

		private int width;
		private int height;

		private boolean init;

		int blockWidth;
		int blockHeight;
		int timeBetweenFrames; // 1000 / frameRate
		int frameCounter;
		byte[] previous;

		public AndroidCamera(Context context) {

			surfaceView = (SurfaceView) findViewById(R.id.mediarecorder_Surfaceview);
			surfaceView.setVisibility(View.VISIBLE);
			surfaceHolder = surfaceView.getHolder();
			surfaceHolder.addCallback(AndroidCamera.this);
			surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);

			width = 352 / 2;
			height = 288 / 2;

			init = false;
			Log.d("DEBUG", "AndroidCamera()");
		}

		private void startVideo() {
			Log.d("DEBUG", "startVideo()");

			RTMPConnectionUtil.ConnectRed5(CameraVideoActivity.this);
			RTMPConnectionUtil.netStream = new UltraNetStream(
					RTMPConnectionUtil.connection);
			RTMPConnectionUtil.netStream
					.addEventListener(new NetStream.ListenerAdapter() {

						@Override
						public void onNetStatus(final INetStream source,
								final Map<String, Object> info) {
							Log.d("DEBUG", "Publisher#NetStream#onNetStatus: "
									+ info);

							final Object code = info.get("code");

							if (NetStream.PUBLISH_START.equals(code)) {
								if (CameraVideoActivity.aCamera != null) {
									RTMPConnectionUtil.netStream
											.attachCamera(aCamera, -1 /* snapshotMilliseconds */);
									Log.d("DEBUG", "aCamera.start()");
									aCamera.start();
								} else {
									Log.d("DEBUG", "camera == null");
								}
							}
						}
					});

			RTMPConnectionUtil.netStream.publish("anystringdata", NetStream.LIVE);
		}

		public void start() {
			camera.startPreview();
			streaming = true;
		}

		public void stop() {
			camera.stopPreview();
			streaming = false;
		}

		public void printHexString(byte[] b) {
			for (int i = 0; i < b.length; i++) {
				String hex = Integer.toHexString(b[i] & 0xFF);
				if (hex.length() == 1) {
					hex = '0' + hex;
				}

			}
		}

		@Override
		public void onPreviewFrame(byte[] arg0, Camera arg1) {
			// TODO Auto-generated method stub
			// if (!active) return;
			if (!init) {
				blockWidth = 32;
				blockHeight = 32;
				timeBetweenFrames = 100; // 1000 / frameRate
				frameCounter = 0;
				previous = null;
				init = true;
			}
			final long ctime = System.currentTimeMillis();

			/** 将采集的YUV420SP数据转换为RGB格式 */
			byte[] current = RemoteUtil.decodeYUV420SP2RGB(arg0, width, height);
			try {
				//

				final byte[] packet = RemoteUtil.encode(current, previous,
						blockWidth, blockHeight, width, height);
				fireOnVideoData(new MediaDataByteArray(timeBetweenFrames,
						new ByteArray(packet)));
				previous = current;
				if (++frameCounter % 10 == 0)
					previous = null;

			} catch (Exception e) {
				e.printStackTrace();
			}
			final int spent = (int) (System.currentTimeMillis() - ctime);
			try {

				Thread.sleep(Math.max(0, timeBetweenFrames - spent));
			} catch (InterruptedException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}

		@Override
		public void surfaceChanged(SurfaceHolder holder, int format, int width,
				int height) {
			// TODO Auto-generated method stub
			// camera.startPreview();
			// camera.unlock();

			// Log.d("DEBUG", "surfaceChanged()");

			// startVideo();
		}

		@Override
		public void surfaceCreated(SurfaceHolder holder) {
			// TODO Auto-generated method stub
			camera = Camera.open();
			try {
				camera.setPreviewDisplay(surfaceHolder);
				camera.setPreviewCallback(this);
				Camera.Parameters params = camera.getParameters();
				params.setPreviewSize(width, height);
				camera.setParameters(params);
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
				camera.release();
				camera = null;
			}

			Log.d("DEBUG", "surfaceCreated()");
		}

		@Override
		public void surfaceDestroyed(SurfaceHolder holder) {
			// TODO Auto-generated method stub
			if (camera != null) {
				camera.stopPreview();
				camera.release();
				camera = null;
			}

		}

	}

	/* 定时器设置，实现计时 */
	private Handler handler = new Handler();
	int s, h, m, s1, m1, h1;
	private Runnable task = new Runnable() {
		public void run() {
			if (isTiming) {
				handler.postDelayed(this, 1000);
				s++;
				if (s < 60) {
					second.setText(format(s));
				} else if (s < 3600) {
					m = s / 60;
					s1 = s % 60;
					minute.setText(format(m));
					second.setText(format(s1));
				} else {
					h = s / 3600;
					m1 = (s % 3600) / 60;
					s1 = (s % 3600) % 60;
					hour.setText(format(h));
					minute.setText(format(m1));
					second.setText(format(s1));
				}
			}
		}
	};

RTMPConnectionUtil

	public static void ConnectRed5(Context context) {
//		License.setKey("63140-D023C-D7420-00B15-91FC7");
		connection = new UltraNetConnection();
		connection.configuration().put(UltraNetConnection.Configuration.INACTIVITY_TIMEOUT, -1);
        connection.configuration().put(UltraNetConnection.Configuration.RECEIVE_BUFFER_SIZE, 256 * 1024);
        connection.configuration().put(UltraNetConnection.Configuration.SEND_BUFFER_SIZE, 256 * 1024);
		
		//connection.client(new ClientHandler(context));
		connection.addEventListener(new NetConnectionListener());
		//Log.d("DEBUG", User.id + " - " + User.phone);
		connection.connect(red5_url);
	}

附带一款测试Red5用rtmp是否能够连接工具