Android中抓取手机视频流数据。

目前实时抓取手机视频数据有2种方法，一种是通过camera的回调获取源数据，这里获取的源数据是没有编码的数据。

有的人发送yuv数据然后在那绘制图片，也说视频聊天，真是可笑。这种方式是可是实现视频聊天的，但是需要移植编码库

目前可移植的有，android的opencore编码，参考http://www.shouyanwang.org/thread-184-1-1.html。

ffmpeg编码，这个网上很难找，但是也有人实现哦。（编码效率好，但是支持不了高清视频）

编码完成可以通过rtp协议发送。就可以视频啦。rtp协议什么的就不说了哦。

以上方法的代码，在这个链接最好回复我贴了代码，不是完整的。链接：http://www.eoeandroid.com/thread-51460-1-1.html

第2种方法，也就是我用的方法。

通过MediaRecorder录制。然后绑定一个localsocket，可以获取编码后的视频数据传输；

代码如下：

package com.pei;

import java.io.DataInputStream;
import java.io.IOException;
import java.io.InputStream;
import android.app.Activity;
import android.os.Bundle;
import android.graphics.PixelFormat;
import android.media.MediaRecorder;
import android.net.LocalServerSocket;
import android.net.LocalSocket;
import android.net.LocalSocketAddress;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;

/**
* class name：VideoCameraActivity<BR>
* class description：CATCH THE VIDEODATA SEND TO RED5<BR>
* PS： <BR>
*
* @version 1.00 2011/11/05
* @author CODYY)peijiangping
*/
public class VideoCameraActivity extends Activity implements
SurfaceHolder.Callback, MediaRecorder.OnErrorListener,
MediaRecorder.OnInfoListener {
private static final int mVideoEncoder = MediaRecorder.VideoEncoder.H264;
private LocalSocket receiver, sender;
private LocalServerSocket lss;
private MediaRecorder mMediaRecorder = null;
private boolean mMediaRecorderRecording = false;
private SurfaceView mSurfaceView = null;
private SurfaceHolder mSurfaceHolder = null;
private Thread t;

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getWindow().setFormat(PixelFormat.TRANSLUCENT);
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.main);
mSurfaceView = (SurfaceView) this.findViewById(R.id.surface_camera);
SurfaceHolder holder = mSurfaceView.getHolder();
holder.addCallback(this);
holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
mSurfaceView.setVisibility(View.VISIBLE);
receiver = new LocalSocket();
try {
lss = new LocalServerSocket("VideoCamera");
receiver.connect(new LocalSocketAddress("VideoCamera"));
receiver.setReceiveBufferSize(500000);
receiver.setSendBufferSize(500000);
sender = lss.accept();
sender.setReceiveBufferSize(500000);
sender.setSendBufferSize(500000);
} catch (IOException e) {
finish();
return;
}
}

@Override
public void onPause() {
super.onPause();
if (mMediaRecorderRecording) {
stopVideoRecording();
try {
lss.close();
receiver.close();
sender.close();
} catch (IOException e) {
e.printStackTrace();
}
}
finish();
}

private void stopVideoRecording() {
System.out.println("stopVideoRecording");
if (mMediaRecorderRecording || mMediaRecorder != null) {
if (t != null)
t.interrupt();
releaseMediaRecorder();
}
}

private void startVideoRecording() {
(t = new Thread() {
public void run() {
int frame_size = 20000;
byte[] buffer = new byte[1024 * 64];
int num, number = 0;
InputStream fis = null;
try {
fis = receiver.getInputStream();
} catch (IOException e1) {
return;
}
number = 0;
releaseMediaRecorder();
while (true) {
System.out.println("ok");
try {
num = fis.read(buffer, number, frame_size);
number += num;
if (num < frame_size) {
System.out.println("recoend break");
break;
}
} catch (IOException e) {
System.out.println("exception break");
break;
}
}
initializeVideo();
number = 0;
Consumer consumer = new Publisher();// Publisher继承了Consumer
Thread consumerThread = new Thread((Runnable) consumer);
consumer.setRecording(true);// 设置线程状态;
consumerThread.start();// 开始发布数据流
DataInputStream dis = new DataInputStream(fis);
try {
dis.read(buffer, 0, 32);
} catch (IOException e1) {
e1.printStackTrace();
}
byte[] aa = { 0x01, 0x42, (byte) 0x80, 0x0A, (byte) 0xFF,
(byte) 0xE1, 0x00, 0x12, 0x67, 0x42, (byte) 0x80, 0x0A,
(byte) 0xE9, 0x02, (byte) 0xC1, 0x29, 0x08, 0x00, 0x00,
0x1F, 0x40, 0x00, 0x04, (byte) 0xE2, 0x00, 0x20, 0x01,
0x00, 0x04, 0x68, (byte) 0xCE, 0x3C, (byte) 0x80 };
consumer.putData(System.currentTimeMillis(), aa, 33);
while (true) {
try {
int h264length = dis.readInt();
number = 0;
while (number < h264length) {
int lost = h264length - number;
num = fis.read(buffer, 0,
frame_size < lost ? frame_size : lost);
number += num;
consumer.putData(System.currentTimeMillis(),
buffer, num);
}
} catch (IOException e) {
break;
}
}
consumer.setRecording(false);// 设置线程状态;
}
}).start();
}

private boolean initializeVideo() {
System.out.println("initializeVideo");
if (mSurfaceHolder == null)
return false;
mMediaRecorderRecording = true;
if (mMediaRecorder == null)
mMediaRecorder = new MediaRecorder();
else
mMediaRecorder.reset();
mMediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
mMediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
mMediaRecorder.setVideoFrameRate(20);
mMediaRecorder.setVideoSize(352, 288);
mMediaRecorder.setVideoEncoder(mVideoEncoder);
mMediaRecorder.setPreviewDisplay(mSurfaceHolder.getSurface());
mMediaRecorder.setMaxDuration(0);
mMediaRecorder.setMaxFileSize(0);
mMediaRecorder.setOutputFile(sender.getFileDescriptor());
try {
mMediaRecorder.setOnInfoListener(this);
mMediaRecorder.setOnErrorListener(this);
mMediaRecorder.prepare();
mMediaRecorder.start();
} catch (IOException exception) {
releaseMediaRecorder();
finish();
return false;
}
return true;
}

private void releaseMediaRecorder() {
System.out.println("Releasing media recorder.");
if (mMediaRecorder != null) {
if (mMediaRecorderRecording) {
try {
mMediaRecorder.setOnErrorListener(null);
mMediaRecorder.setOnInfoListener(null);
mMediaRecorder.stop();
} catch (RuntimeException e) {
System.out.println("stop fail: " + e.getMessage());
}
mMediaRecorderRecording = false;
}
mMediaRecorder.reset();
mMediaRecorder.release();
mMediaRecorder = null;
}
}

@Override
public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
System.out.println("surfaceChanged");
mSurfaceHolder = holder;
if (!mMediaRecorderRecording) {
initializeVideo();
startVideoRecording();
}
}

@Override
public void surfaceCreated(SurfaceHolder holder) {
System.out.println("surfaceCreated");
mSurfaceHolder = holder;
}

@Override
public void surfaceDestroyed(SurfaceHolder holder) {
System.out.println("surfaceDestroyed");
mSurfaceView = null;
mSurfaceHolder = null;
mMediaRecorder = null;
if (t != null) {
t.interrupt();
}
}

@Override
public void onInfo(MediaRecorder mr, int what, int extra) {
switch (what) {
case MediaRecorder.MEDIA_RECORDER_INFO_UNKNOWN:
System.out.println("MEDIA_RECORDER_INFO_UNKNOWN");
break;

case MediaRecorder.MEDIA_RECORDER_INFO_MAX_DURATION_REACHED:
System.out.println("MEDIA_RECORDER_INFO_MAX_DURATION_REACHED");
break;
case MediaRecorder.MEDIA_RECORDER_INFO_MAX_FILESIZE_REACHED:
System.out.println("MEDIA_RECORDER_INFO_MAX_FILESIZE_REACHED");
break;
}
}

@Override
public void onError(MediaRecorder mr, int what, int extra) {
if (what == MediaRecorder.MEDIA_RECORDER_ERROR_UNKNOWN) {
System.out.println("MEDIA_RECORDER_ERROR_UNKNOWN");
finish();
}
}

}

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原文链接：
http://blog.csdn.net/peijiangping1989/article/details/6942585