使用socket fd将实时视频从手机传输到手机

Question

我是Android编程的新手并且发现自己陷入困境我一直在研究各种方法从手机到手机直播视频直播,似乎主要是功能性的,当然除了最重要的部分:播放流.它似乎是从一部手机发送流,但第二部手机无法播放流.

这是播放方的代码

public class VideoPlayback extends Activity implements Callback {
MediaPlayer mp;
private SurfaceView mPreview;
private SurfaceHolder holder;
private TextView mTextview;
public static final int SERVERPORT = 6775;
public static String SERVERIP="192.168.1.126";
Socket clientSocket;
private Handler handler = new Handler();
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    mPreview = (SurfaceView) findViewById(R.id.surfaceView1);
    mTextview = (TextView) findViewById(R.id.textView1);
    holder = mPreview.getHolder();
    holder.addCallback(this);
    holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
    mTextview.setText("Attempting to connect");
    mp = new MediaPlayer();
    Thread t = new Thread(){
        public void run(){
            try {
                    clientSocket = new Socket(SERVERIP,SERVERPORT);
                handler.post(new Runnable() {
                    @Override
                    public void run() {
                        mTextview.setText("Connected to server");
                    }
                });
                handler.post(new Runnable() {
                    @Override
                    public void run() {
                        try {
                            ParcelFileDescriptor pfd = ParcelFileDescriptor.fromSocket(clientSocket);
                            pfd.getFileDescriptor().sync();
                            mp.setDataSource(pfd.getFileDescriptor());
                            pfd.close();
                            mp.setDisplay(holder);
                            mp.prepareAsync();
                            mp.start();
                        } catch (IOException e) {
                            // TODO Auto-generated catch block
                            e.printStackTrace();
                        }

                    }
                });

            } catch (UnknownHostException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
    };
    t.start();
}

这是流媒体方面的代码

public class VideoStreaming extends Activity{
// User Interface Elements
VideoView mView;
TextView connectionStatus;
SurfaceHolder mHolder;
// Video variable
MediaRecorder recorder; 
// Networking variables
public static String SERVERIP="";
public static final int SERVERPORT = 6775;
private Handler handler = new Handler();
private ServerSocket serverSocket;  
/** Called when the activity is first created. */
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    // Define UI elements
    mView = (VideoView) findViewById(R.id.video_preview);
    connectionStatus = (TextView) findViewById(R.id.connection_status_textview);
    mHolder = mView.getHolder();
    mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
    SERVERIP = "192.168.1.126";
    // Run new thread to handle socket communications
    Thread sendVideo = new Thread(new SendVideoThread());
    sendVideo.start();
}
 public class SendVideoThread implements Runnable{
    public void run(){
        // From Server.java
        try {
            if(SERVERIP!=null){
                handler.post(new Runnable() {
                    @Override
                    public void run() {
                        connectionStatus.setText("Listening on IP: " + SERVERIP);
                    }
                });
                serverSocket = new ServerSocket(SERVERPORT);
                while(true) {
                    //listen for incoming clients
                    Socket client = serverSocket.accept();
                    handler.post(new Runnable(){
                        @Override
                        public void run(){
                            connectionStatus.setText("Connected.");
                        }
                    });
                    try{
                            // Begin video communication
                            final ParcelFileDescriptor pfd = ParcelFileDescriptor.fromSocket(client);
                            handler.post(new Runnable(){
                                @Override
                                public void run(){
                                    recorder = new MediaRecorder();
                                    recorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
                                    recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);                 
                                    recorder.setOutputFile(pfd.getFileDescriptor());
                                    recorder.setVideoFrameRate(20);
                                    recorder.setVideoSize(176,144);
                                    recorder.setVideoEncoder(MediaRecorder.VideoEncoder.H263);
                                    recorder.setPreviewDisplay(mHolder.getSurface());
                                    try {
                                        recorder.prepare();
                                    } catch (IllegalStateException e) {
                                        // TODO Auto-generated catch block
                                        e.printStackTrace();
                                    } catch (IOException e) {
                                        // TODO Auto-generated catch block
                                        e.printStackTrace();
                                    }
                                    recorder.start();
                                }
                            });
                    } catch (Exception e) {
                        handler.post(new Runnable(){
                            @Override
                            public void run(){
                                connectionStatus.setText("Oops.Connection interrupted. Please reconnect your phones.");
                            }
                        });
                        e.printStackTrace();
                    }
                }
            } else {
                handler.post(new Runnable() {
                    @Override
                    public void run(){
                        connectionStatus.setText("Couldn't detect internet connection.");
                    }
                });
            }
        } catch (Exception e){
            handler.post(new Runnable() {
                @Override
                public void run() {
                    connectionStatus.setText("Error");
                }
            });
            e.printStackTrace();
        }
        // End from server.java
    }
}

尝试创建MediaPLayer时收到以下错误

05-24 16:25:39.360: ERROR/MediaPlayerService(88): offset error
05-24 16:25:39.360: ERROR/MediaPlayer(11895): Unable to to create media player
05-24 16:25:39.360: WARN/System.err(11895): java.io.IOException: setDataSourceFD failed.: status=0x80000000
05-24 16:25:39.360: WARN/System.err(11895):     at android.media.MediaPlayer.setDataSource(Native Method)
05-24 16:25:39.360: WARN/System.err(11895):     at android.media.MediaPlayer.setDataSource(MediaPlayer.java:811)
05-24 16:25:39.360: WARN/System.err(11895):     at com.conti.VideoPlayBack.VideoPlayback$1$2.run(VideoPlayback.java:63)
05-24 16:25:39.360: WARN/System.err(11895):     at android.os.Handler.handleCallback(Handler.java:587)
05-24 16:25:39.360: WARN/System.err(11895):     at android.os.Handler.dispatchMessage(Handler.java:92)
05-24 16:25:39.360: WARN/System.err(11895):     at android.os.Looper.loop(Looper.java:132)
05-24 16:25:39.360: WARN/System.err(11895):     at android.app.ActivityThread.main(ActivityThread.java:4025)
05-24 16:25:39.360: WARN/System.err(11895):     at java.lang.reflect.Method.invokeNative(Native Method)
05-24 16:25:39.360: WARN/System.err(11895):     at java.lang.reflect.Method.invoke(Method.java:491)
05-24 16:25:39.360: WARN/System.err(11895):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:841)
05-24 16:25:39.360: WARN/System.err(11895):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:599)
05-24 16:25:39.360: WARN/System.err(11895):     at dalvik.system.NativeStart.main(Native Method)

有人有解决方法吗？提前致谢!

Answer 1

我发现了一个用于实现我正在尝试的开源项目.它通过IP摄像头处理带有元数据的视频.虽然它不直接向手机发送视频,但它确实播放了各种设备的视频观看.源代码可在以下项目页面http://code.google.com/p/ipcamera-for-android/中找到.

使用Android 4.4,还有另一种播放实时MJPEG流的方法.您正在播放的流应由其他设备在UDP端口上广播.假设我们在192.168.0.101:8080播放了一个流.我们可以通过在布局中添加WebView来播放流.然后在我们的活动中我们执行以下操作:

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.mjpeg_activity);
    // Grab instance of WebView
    WebView webView = (WebView)findViewById(R.id.webViewStream);
    // Set page content for webview
    webView.loadData("<html><head><meta name='viewport' content='target-densitydpi=device-dpi,initial-scale=1,minimum-scale=1,user-scalable=yes'/></head><body><center><img src=\"http://192.168.0.101:8080/\" alt=\"Stream\" align=\"middle\"></center></body></html>", "text/html", null);
    webView.getSettings().setBuiltInZoomControls(true);
}

在内容中我们告诉网页使用设备的dpi.为了支持用户在网页上缩放缩放,我添加了以下initial-scale = 1,minimum-scale = 1,user-scalable = yes.最初图像是原始尺寸,不能变小.用户现在可以缩放以放大图像并缩小到原始大小.删除最小刻度将使用户完全控制缩放,但可能导致图像变得如此之小,以至于无法找到它.