Android y MJPEG

Necesito obtener la transmisión de mjpeg desde una cámara IP, ¿alguien sabe cómo hacerlo? Busqué en Google un poco y encuentro este ejemplo

http://www.anddev.org/mjpeg_on_android_anyone-t1871.html

pero me sorprendí cuando intenté obtener la transmisión de otra actividad llamada por la actividad principal. Aquí el código:

Actividad principal

package com.test; public class IntentTest extends Activity { /** Called when the activity is first created. */ ListView myListView = null; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); myListView = (ListView)findViewById(R.id.listView); final ArrayList items = new ArrayList(); items.add("00408C944B9A"); final ArrayAdapter aa; aa = new ArrayAdapter(this, android.R.layout.simple_list_item_1, items); myListView.setAdapter(aa); myListView.setOnItemClickListener(listClicked); } private OnItemClickListener listClicked = new OnItemClickListener() { public void onItemClick(AdapterView arg0, View arg1, int position, long id) { // TODO Auto-generated method stub Intent i = new Intent(IntentTest.this, OtherActivity.class); i.putExtra("MAC", myListView.getItemAtPosition(position).toString()); startActivity(i); } }; } 

Segunda actividad

 package com.test; import com.test.mjpeg.mjpegsample.MjpegView.*; import com.test.parser.JSONParse; public class OtherActivity extends Activity { /** Called when the activity is first created. */ private MjpegView mv; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); Bundle extras = getIntent().getExtras(); if (extras != null){ String mac = (String)extras.get("MAC"); Log.i("Other", "---->" + mac); TextView tv = (TextView)findViewById(R.id.textView); tv.setText(mac); String URL = "myurl"; requestWindowFeature(Window.FEATURE_NO_TITLE); getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN); mv = new MjpegView(this); setContentView(mv); mv.setSource(MjpegInputStream.read(URL)); mv.setDisplayMode(MjpegView.SIZE_BEST_FIT); mv.showFps(true); } } public void onPause() { super.onPause(); mv.stopPlayback(); } } 

    Encontré este código en Internet hace algún tiempo, quizás sea de alguna ayuda para ti.

    MjpegSample Class

     package de.mjpegsample; import android.app.Activity; import android.os.Bundle; import android.view.Menu; import android.view.MenuItem; import android.view.Window; import android.view.WindowManager; import de.mjpegsample.MjpegView.MjpegInputStream; import de.mjpegsample.MjpegView.MjpegView; public class MjpegSample extends Activity { private MjpegView mv; private static final int MENU_QUIT = 1; /* Creates the menu items */ public boolean onCreateOptionsMenu(Menu menu) { menu.add(0, MENU_QUIT, 0, "Quit"); return true; } /* Handles item selections */ public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case MENU_QUIT: finish(); return true; } return false; } public void onCreate(Bundle icicle) { super.onCreate(icicle); //sample public cam String URL = "http://gamic.dnsalias.net:7001/img/video.mjpeg"; requestWindowFeature(Window.FEATURE_NO_TITLE); getWindow().setFlags(WindowManager.LayoutParams.FLAG_FORCE_NOT_FULLSCREEN, WindowManager.LayoutParams.FLAG_FORCE_NOT_FULLSCREEN); mv = new MjpegView(this); setContentView(mv); mv.setSource(MjpegInputStream.read(URL)); mv.setDisplayMode(MjpegView.SIZE_BEST_FIT); mv.showFps(false); } public void onPause() { super.onPause(); mv.stopPlayback(); } } 

    Clase MjpegView

     package de.mjpegsample.MjpegView; import java.io.IOException; import android.content.Context; import android.graphics.Bitmap; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.PorterDuff; import android.graphics.PorterDuffXfermode; import android.graphics.Rect; import android.graphics.Typeface; import android.util.AttributeSet; import android.view.SurfaceHolder; import android.view.SurfaceView; public class MjpegView extends SurfaceView implements SurfaceHolder.Callback { public final static int POSITION_UPPER_LEFT = 9; public final static int POSITION_UPPER_RIGHT = 3; public final static int POSITION_LOWER_LEFT = 12; public final static int POSITION_LOWER_RIGHT = 6; public final static int SIZE_STANDARD = 1; public final static int SIZE_BEST_FIT = 4; public final static int SIZE_FULLSCREEN = 8; private MjpegViewThread thread; private MjpegInputStream mIn = null; private boolean showFps = false; private boolean mRun = false; private boolean surfaceDone = false; private Paint overlayPaint; private int overlayTextColor; private int overlayBackgroundColor; private int ovlPos; private int dispWidth; private int dispHeight; private int displayMode; public class MjpegViewThread extends Thread { private SurfaceHolder mSurfaceHolder; private int frameCounter = 0; private long start; private Bitmap ovl; public MjpegViewThread(SurfaceHolder surfaceHolder, Context context) { mSurfaceHolder = surfaceHolder; } private Rect destRect(int bmw, int bmh) { int tempx; int tempy; if (displayMode == MjpegView.SIZE_STANDARD) { tempx = (dispWidth / 2) - (bmw / 2); tempy = (dispHeight / 2) - (bmh / 2); return new Rect(tempx, tempy, bmw + tempx, bmh + tempy); } if (displayMode == MjpegView.SIZE_BEST_FIT) { float bmasp = (float) bmw / (float) bmh; bmw = dispWidth; bmh = (int) (dispWidth / bmasp); if (bmh > dispHeight) { bmh = dispHeight; bmw = (int) (dispHeight * bmasp); } tempx = (dispWidth / 2) - (bmw / 2); tempy = (dispHeight / 2) - (bmh / 2); return new Rect(tempx, tempy, bmw + tempx, bmh + tempy); } if (displayMode == MjpegView.SIZE_FULLSCREEN) return new Rect(0, 0, dispWidth, dispHeight); return null; } public void setSurfaceSize(int width, int height) { synchronized(mSurfaceHolder) { dispWidth = width; dispHeight = height; } } private Bitmap makeFpsOverlay(Paint p, String text) { Rect b = new Rect(); p.getTextBounds(text, 0, text.length(), b); int bwidth = b.width()+2; int bheight = b.height()+2; Bitmap bm = Bitmap.createBitmap(bwidth, bheight, Bitmap.Config.ARGB_8888); Canvas c = new Canvas(bm); p.setColor(overlayBackgroundColor); c.drawRect(0, 0, bwidth, bheight, p); p.setColor(overlayTextColor); c.drawText(text, -b.left+1, (bheight/2)-((p.ascent()+p.descent())/2)+1, p); return bm; } public void run() { start = System.currentTimeMillis(); PorterDuffXfermode mode = new PorterDuffXfermode(PorterDuff.Mode.DST_OVER); Bitmap bm; int width; int height; Rect destRect; Canvas c = null; Paint p = new Paint(); String fps = ""; while (mRun) { if(surfaceDone) { try { c = mSurfaceHolder.lockCanvas(); synchronized (mSurfaceHolder) { try { bm = mIn.readMjpegFrame(); destRect = destRect(bm.getWidth(),bm.getHeight()); c.drawColor(Color.BLACK); c.drawBitmap(bm, null, destRect, p); if(showFps) { p.setXfermode(mode); if(ovl != null) { height = ((ovlPos & 1) == 1) ? destRect.top : destRect.bottom-ovl.getHeight(); width = ((ovlPos & 8) == 8) ? destRect.left : destRect.right -ovl.getWidth(); c.drawBitmap(ovl, width, height, null); } p.setXfermode(null); frameCounter++; if((System.currentTimeMillis() - start) >= 1000) { fps = String.valueOf(frameCounter)+"fps"; frameCounter = 0; start = System.currentTimeMillis(); ovl = makeFpsOverlay(overlayPaint, fps); } } } catch (IOException e) {} } } finally { if (c != null) mSurfaceHolder.unlockCanvasAndPost(c); } } } } } private void init(Context context) { SurfaceHolder holder = getHolder(); holder.addCallback(this); thread = new MjpegViewThread(holder, context); setFocusable(true); overlayPaint = new Paint(); overlayPaint.setTextAlign(Paint.Align.LEFT); overlayPaint.setTextSize(12); overlayPaint.setTypeface(Typeface.DEFAULT); overlayTextColor = Color.WHITE; overlayBackgroundColor = Color.BLACK; ovlPos = MjpegView.POSITION_LOWER_RIGHT; displayMode = MjpegView.SIZE_STANDARD; dispWidth = getWidth(); dispHeight = getHeight(); } public void startPlayback() { if(mIn != null) { mRun = true; thread.start(); } } public void stopPlayback() { mRun = false; boolean retry = true; while(retry) { try { thread.join(); retry = false; } catch (InterruptedException e) {} } } public MjpegView(Context context, AttributeSet attrs) { super(context, attrs); init(context); } public void surfaceChanged(SurfaceHolder holder, int f, int w, int h) { thread.setSurfaceSize(w, h); } public void surfaceDestroyed(SurfaceHolder holder) { surfaceDone = false; stopPlayback(); } public MjpegView(Context context) { super(context); init(context); } public void surfaceCreated(SurfaceHolder holder) { surfaceDone = true; } public void showFps(boolean b) { showFps = b; } public void setSource(MjpegInputStream source) { mIn = source; startPlayback(); } public void setOverlayPaint(Paint p) { overlayPaint = p; } public void setOverlayTextColor(int c) { overlayTextColor = c; } public void setOverlayBackgroundColor(int c) { overlayBackgroundColor = c; } public void setOverlayPosition(int p) { ovlPos = p; } public void setDisplayMode(int s) { displayMode = s; } } 

    Clase MjpegInputStream

     package de.mjpegsample.MjpegView; import java.io.BufferedInputStream; import java.io.ByteArrayInputStream; import java.io.DataInputStream; import java.io.IOException; import java.io.InputStream; import java.net.URI; import java.util.Properties; import org.apache.http.HttpResponse; import org.apache.http.client.ClientProtocolException; import org.apache.http.client.methods.HttpGet; import org.apache.http.impl.client.DefaultHttpClient; import android.graphics.Bitmap; import android.graphics.BitmapFactory; public class MjpegInputStream extends DataInputStream { private final byte[] SOI_MARKER = { (byte) 0xFF, (byte) 0xD8 }; private final byte[] EOF_MARKER = { (byte) 0xFF, (byte) 0xD9 }; private final String CONTENT_LENGTH = "Content-Length"; private final static int HEADER_MAX_LENGTH = 100; private final static int FRAME_MAX_LENGTH = 40000 + HEADER_MAX_LENGTH; private int mContentLength = -1; public static MjpegInputStream read(String url) { HttpResponse res; DefaultHttpClient httpclient = new DefaultHttpClient(); try { res = httpclient.execute(new HttpGet(URI.create(url))); return new MjpegInputStream(res.getEntity().getContent()); } catch (ClientProtocolException e) { } catch (IOException e) {} return null; } public MjpegInputStream(InputStream in) { super(new BufferedInputStream(in, FRAME_MAX_LENGTH)); } private int getEndOfSeqeunce(DataInputStream in, byte[] sequence) throws IOException { int seqIndex = 0; byte c; for(int i=0; i < FRAME_MAX_LENGTH; i++) { c = (byte) in.readUnsignedByte(); if(c == sequence[seqIndex]) { seqIndex++; if(seqIndex == sequence.length) return i + 1; } else seqIndex = 0; } return -1; } private int getStartOfSequence(DataInputStream in, byte[] sequence) throws IOException { int end = getEndOfSeqeunce(in, sequence); return (end < 0) ? (-1) : (end - sequence.length); } private int parseContentLength(byte[] headerBytes) throws IOException, NumberFormatException { ByteArrayInputStream headerIn = new ByteArrayInputStream(headerBytes); Properties props = new Properties(); props.load(headerIn); return Integer.parseInt(props.getProperty(CONTENT_LENGTH)); } public Bitmap readMjpegFrame() throws IOException { mark(FRAME_MAX_LENGTH); int headerLen = getStartOfSequence(this, SOI_MARKER); reset(); byte[] header = new byte[headerLen]; readFully(header); try { mContentLength = parseContentLength(header); } catch (NumberFormatException nfe) { mContentLength = getEndOfSeqeunce(this, EOF_MARKER); } reset(); byte[] frameData = new byte[mContentLength]; skipBytes(headerLen); readFully(frameData); return BitmapFactory.decodeStream(new ByteArrayInputStream(frameData)); } } 

    Si necesita más información, hágamelo saber, lo ayudaré de cualquier manera que pueda.

    FYI: No escribí SimpleMjpegView, puedes encontrar más código actualizado aquí

    Para aquellos que buscan hacer que esto funcione con AsyncTask (y por lo tanto, trabajar en Ice Cream Sandwich (ICS), 4.0.4), consulte Android ICS y MJPEG utilizando AsyncTask .

    Tuve el mismo problema e intenté usar visores Mjpeg personalizados. Mientras trabajaban, demostraron ser inestables y torpes para mí.

    Simplemente estoy usando un WebView. En Android Studio, simplemente arrastre y suelte un WebView. My WebView no cubre toda la pantalla, sino la mitad.

    Luego, para que se ajuste mejor al video, en su onCreate:

    Si usa Kotlin:

     webView.settings.loadWithOverviewMode = true; webView.settings.useWideViewPort = true; 

    Si usa Java:

     webView.getSettings().setLoadWithOverviewMode(true); webView.getSettings().setUseWideViewPort(true); 

    Y luego, al hacer clic en el botón:

    Para comenzar:

     webView.loadUrl("http://$id:8081/cam.mjpeg") // start 

    Para detener:

     webView.stopLoading() webView.loadUrl("about:blank") 

    Espero que esto ayude.