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• Android recording video with overlay view

  6 mars 2016, par t0m

  I am trying app in android which have functionality to capture video with overlay views. (Also i need onPreviewFrame method.)
  Via SurfaceView and JavaCV with FFmpeg :

  ---

  OpenCVCameraActivity.java :

  import android.app.Activity;
  
  import android.content.Context;
  
  import android.hardware.Camera;
  
  import android.hardware.Camera.PreviewCallback;
  
  import android.media.AudioFormat;
  
  import android.media.AudioRecord;
  
  import android.media.MediaRecorder;
  
  import android.os.Bundle;
  
  import android.util.Log;
  
  import android.view.KeyEvent;
  
  import android.view.Menu;
  
  import android.view.SurfaceHolder;
  
  import android.view.SurfaceView;
  
  import android.view.View;
  
  import android.widget.FrameLayout;
  
  import android.widget.Toast;
  
  
  
  import org.bytedeco.javacv.FFmpegFrameRecorder;
  
  import org.bytedeco.javacv.Frame;
  
  
  
  import java.io.File;
  
  import java.io.IOException;
  
  import java.nio.ByteBuffer;
  
  import java.nio.ShortBuffer;
  
  import java.util.List;
  
  
  
  
  
  @SuppressWarnings("ALL")
  
  public class OpenCVCameraActivity extends Activity {
  
  
  
      private static final String TAG = OpenCVCameraActivity.class.getSimpleName();
  
  
  
      private long startTime = 0;
  
      private boolean isPreviewOn = false;
  
  
  
      private int sampleAudioRateInHz = 44100;
  
      private Camera.Size previewSize;        //preview and Camera and Recorder width and height
  
      private int recorderFrameRate = 25;
  
  
  
      // audio data getting thread
  
      private AudioRecord audioRecord;
  
      private AudioRecordRunnable audioRecordRunnable;
  
      private Thread audioThread;
  
      private volatile boolean runAudioThread = true;
  
  
  
      // video data getting thread
  
      private Camera mCamera;
  
      private CameraView mPreview;
  
      private FFmpegFrameRecorder recorder;
  
      private boolean recording = false;
  
      private Frame yuvImage = null;
  
  
  
      //storage
  
      private Storage storage;
  
  
  
      @Override
  
      public void onCreate(Bundle savedInstanceState) {
  
          super.onCreate(savedInstanceState);
  
          if(Static.DEBUG) Log.i(TAG, "onCreate()");
  
  
  
          Thread.setDefaultUncaughtExceptionHandler(uncaughtExceptionHandler);
  
  
  
          setContentView(R.layout.activity_opencv);
  
  
  
          prepareCamera();
  
      }
  
  
  
      private Thread.UncaughtExceptionHandler uncaughtExceptionHandler =
  
              new Thread.UncaughtExceptionHandler() {
  
                  public void uncaughtException(Thread thread, Throwable ex) {
  
                      if(Static.DEBUG) Log.e(TAG, "Uncaught exception", ex);
  
                  }
  
              };
  
  
  
      @Override
  
      protected void onRestart() {
  
          super.onRestart();
  
          if (Static.DEBUG) Log.i(TAG, "onRestart()");
  
      }
  
  
  
      @Override
  
      protected void onStart() {
  
          super.onStart();
  
          if (Static.DEBUG) Log.i(TAG, "onStart()");
  
      }
  
  
  
      @Override
  
      protected void onResume() {
  
          super.onResume();
  
          if (Static.DEBUG) Log.i(TAG, "onResume()");
  
  
  
          storage = new Storage(this);
  
          if(storage.mExternalStorageAvailable == true && storage.mExternalStorageWriteable == false)
  
              Static.showToast(this, getString(R.string.errExternalStorageReadOnly), Toast.LENGTH_LONG);
  
          else if (storage.mExternalStorageAvailable == false && storage.mExternalStorageWriteable == false)
  
              Static.showToast(this, getString(R.string.errExternalStorage), Toast.LENGTH_LONG);
  
      }
  
  
  
      @Override
  
      public boolean onCreateOptionsMenu(Menu menu) {
  
          if (Static.DEBUG) Log.i(TAG, "onCreateOptionsMenu()");
  
          return super.onCreateOptionsMenu(menu);
  
      }
  
  
  
      @Override
  
      protected void onPause() {
  
          super.onPause();
  
          if (Static.DEBUG) Log.i(TAG, "onPause()");
  
      }
  
  
  
      @Override
  
      protected void onStop() {
  
          super.onStop();
  
          if (Static.DEBUG) Log.i(TAG, "onStop()");
  
      }
  
  
  
      @Override
  
      protected void onDestroy() {
  
          super.onDestroy();
  
          if (Static.DEBUG) Log.i(TAG, "onDestroy()");
  
  
  
          recording = false;
  
  
  
          if (mPreview != null) {
  
              mPreview.stopPreview();
  
          }
  
  
  
          if (mCamera != null) {
  
              mCamera.stopPreview();
  
              mCamera.release();
  
              mCamera = null;
  
          }
  
      }
  
  
  
      /** Prepare camera object.
  
       * */
  
      private void prepareCamera() {
  
          //1. Open camera object
  
          try {
  
              mCamera = getCameraInstance(this);
  
          } catch (Exception e) {
  
              e.printStackTrace();
  
              Static.showToast(this, e.getMessage(), Toast.LENGTH_LONG);
  
              finish();
  
              return;
  
          }
  
  
  
          setOptimalCameraParams();
  
  
  
          //2. Connect Preview + 3. Start Preview + 8e Stop preview v metode surfaceChanged
  
          mPreview = new CameraView(this, mCamera);
  
          FrameLayout preview = (FrameLayout) findViewById(R.id.cameraPreview);
  
          preview.addView(mPreview); //surfaceView to FrameLayout
  
          if(Static.DEBUG) Log.i(TAG, "camera preview start: OK");
  
      }
  
  
  
      /**
  
       * A safe way to get an instance of the Camera object.
  
       */
  
      @SuppressWarnings("deprecation")
  
      public static Camera getCameraInstance(Context ctx) throws Exception {
  
          Camera c = Camera.open();
  
          if (c == null)
  
              throw new Exception(ctx.getString(R.string.errCameraNotAvailable));
  
  
  
          if(Static.DEBUG) Log.i(TAG, "camera open");
  
          return c; // attempt to get a Camera instance, otherwise null
  
      }
  
  
  
      /**Method set optmial parameters. Depend on HW possibilities.*/
  
      @SuppressWarnings("deprecation")
  
      private void setOptimalCameraParams(){
  
  
  
          // Camera parameters
  
          Camera.Parameters params = mCamera.getParameters();
  
          List<string> focusModes = params.getSupportedFocusModes();
  
          if (Static.DEBUG) Log.i(TAG, "focusModes():" + focusModes.toString());
  
          if (Static.DEBUG) Log.i(TAG, "Camera parameters:\n" + params.flatten());
  
  
  
          params.setRecordingHint(true); //MediaRecorder.start() to start faster
  
  
  
          //Automatically autofocus if it's possible
  
          if (params.getSupportedFocusModes().contains(Camera.Parameters.FOCUS_MODE_CONTINUOUS_VIDEO)) {
  
              params.setFocusMode(Camera.Parameters.FOCUS_MODE_CONTINUOUS_VIDEO);
  
          } else if (focusModes.contains(Camera.Parameters.FOCUS_MODE_AUTO)) { //at least focus auto
  
              params.setFocusMode(Camera.Parameters.FOCUS_MODE_AUTO);
  
          }
  
  
  
          // set Camera parameters
  
          mCamera.setParameters(params);
  
      }
  
  
  
      //---------------------------------------
  
      // initialize ffmpeg_recorder
  
      //---------------------------------------
  
      private void initRecorder() throws Exception {
  
          if(Static.DEBUG) Log.i(TAG,"init recorder");
  
  
  
          File output = null;
  
  
  
          try {
  
              output = storage.getOutputMediaFile(storage.MEDIA_TYPE_VIDEO);
  
              if(output == null)
  
                  throw new Exception();
  
          } catch (Exception e) {
  
              e.printStackTrace();
  
              throw new Exception(getString(R.string.errSetOutputFile));
  
          }
  
  
  
          if (yuvImage == null) {
  
              yuvImage = new Frame(previewSize.width, previewSize.height, Frame.DEPTH_UBYTE, 2);
  
              if(Static.DEBUG) Log.i(TAG, "create yuvImage");
  
          }
  
  
  
          if(Static.DEBUG) Log.i(TAG, "ffmpeg_url: " + output.getPath());
  
          recorder = new FFmpegFrameRecorder(output.getPath(), previewSize.width, previewSize.height, 1);
  
          //recorder.setVideoCodec(avcodec.AV_CODEC_ID_H264);
  
          //recorder.setVideoOption("preset", "veryfast"); // or ultrafast or fast, etc.
  
          //recorder.setVideoQuality(0); // maximum quality, replace recorder.setVideoBitrate(16384);
  
          //recorder.setPixelFormat(avutil.AV_PIX_FMT_YUV420P);
  
          recorder.setFormat("mp4");
  
          recorder.setSampleRate(sampleAudioRateInHz);
  
          recorder.setFrameRate(recorderFrameRate);
  
  
  
          if(Static.DEBUG) Log.i(TAG, "recorder initialize success");
  
  
  
          audioRecordRunnable = new AudioRecordRunnable();
  
          audioThread = new Thread(audioRecordRunnable);
  
          runAudioThread = true;
  
      }
  
  
  
      public void startRecording() {
  
  
  
          try {
  
              initRecorder();
  
          } catch (Exception e){
  
              e.printStackTrace();
  
              Static.showToast(this, e.getMessage(), Toast.LENGTH_LONG);
  
          }
  
  
  
          try {
  
              recorder.start();
  
              startTime = System.currentTimeMillis();
  
              recording = true;
  
              audioThread.start();
  
  
  
          } catch (FFmpegFrameRecorder.Exception e) {
  
              e.printStackTrace();
  
          }
  
      }
  
  
  
      public void stopRecording() {
  
  
  
          runAudioThread = false;
  
          try {
  
              audioThread.join();
  
          } catch (InterruptedException e) {
  
              // reset interrupt to be nice
  
              Thread.currentThread().interrupt();
  
              return;
  
          }
  
          audioRecordRunnable = null;
  
          audioThread = null;
  
  
  
          if (recorder != null &amp;&amp; recording) {
  
  
  
              recording = false;
  
              if(Static.DEBUG) Log.i(TAG,"Finishing recording, calling stop and release on recorder");
  
              try {
  
                  recorder.stop();
  
                  recorder.release();
  
              } catch (FFmpegFrameRecorder.Exception e) {
  
                  e.printStackTrace();
  
              }
  
              recorder = null;
  
  
  
          }
  
      }
  
  
  
      @Override
  
      public boolean onKeyDown(int keyCode, KeyEvent event) {
  
  
  
          if (keyCode == KeyEvent.KEYCODE_BACK) {
  
              if (recording) {
  
                  stopRecording();
  
              }
  
  
  
              finish();
  
  
  
              return true;
  
          }
  
  
  
          return super.onKeyDown(keyCode, event);
  
      }
  
  
  
      public void onClickBtnStartRecord(View v) {
  
          if (!recording) {
  
              startRecording();
  
              if(Static.DEBUG) Log.i(TAG, "Start Button Pushed");
  
          } else {
  
              // This will trigger the audio recording loop to stop and then set isRecorderStart = false;
  
              stopRecording();
  
              if(Static.DEBUG) Log.i(TAG, "Stop Button Pushed");
  
          }
  
      }
  
  
  
      //---------------------------------------------
  
      // audio thread, gets and encodes audio data
  
      //---------------------------------------------
  
      class AudioRecordRunnable implements Runnable {
  
  
  
          @Override
  
          public void run() {
  
              android.os.Process.setThreadPriority(android.os.Process.THREAD_PRIORITY_URGENT_AUDIO);
  
  
  
              // Audio
  
              int bufferSize;
  
              ShortBuffer audioData;
  
              int bufferReadResult;
  
  
  
              bufferSize = AudioRecord.getMinBufferSize(sampleAudioRateInHz,
  
                      AudioFormat.CHANNEL_IN_MONO, AudioFormat.ENCODING_PCM_16BIT);
  
              audioRecord = new AudioRecord(MediaRecorder.AudioSource.MIC, sampleAudioRateInHz,
  
                      AudioFormat.CHANNEL_IN_MONO, AudioFormat.ENCODING_PCM_16BIT, bufferSize);
  
  
  
              audioData = ShortBuffer.allocate(bufferSize);
  
  
  
              if(Static.DEBUG) Log.i(TAG, "audioRecord.startRecording()");
  
              audioRecord.startRecording();
  
  
  
              /* ffmpeg_audio encoding loop */
  
              while (runAudioThread) {
  
                  //if(Static.DEBUG) Log.i(TAG,"recording? " + recording);
  
                  bufferReadResult = audioRecord.read(audioData.array(), 0, audioData.capacity());
  
                  audioData.limit(bufferReadResult);
  
                  if (bufferReadResult > 0) {
  
                      //if(Static.DEBUG) Log.i(TAG,"bufferReadResult: " + bufferReadResult);
  
                      // If "recording" isn't true when start this thread, it never get's set according to this if statement...!!!
  
                      // Why?  Good question...
  
                      if (recording) {
  
                          try {
  
                              recorder.recordSamples(audioData);
  
                              //if(Static.DEBUG) Log.i(TAG,"recording " + 1024*i + " to " + 1024*i+1024);
  
                          } catch (FFmpegFrameRecorder.Exception e) {
  
                              if(Static.DEBUG) Log.i(TAG,e.getMessage());
  
                              e.printStackTrace();
  
                          }
  
                      }
  
                  }
  
              }
  
              if(Static.DEBUG) Log.i(TAG,"AudioThread Finished, release audioRecord");
  
  
  
              /* encoding finish, release recorder */
  
              if (audioRecord != null) {
  
                  audioRecord.stop();
  
                  audioRecord.release();
  
                  audioRecord = null;
  
                  if(Static.DEBUG) Log.i(TAG,"audioRecord released");
  
              }
  
          }
  
      }
  
  
  
      /**TODO*/
  
      private Camera.Size getBestPreviewSize(int width, int height, Camera.Parameters parameters) {
  
          Camera.Size result=null;
  
  
  
          for (Camera.Size size : parameters.getSupportedPreviewSizes()) {
  
  
  
              if(Static.DEBUG) Log.i(TAG, size.width + "/" + size.height);
  
  
  
              if (size.width&lt;=width &amp;&amp; size.height&lt;=height) {
  
                  if (result==null) {
  
                      result=size;
  
                  } else {
  
                      int resultArea=result.width*result.height;
  
                      int newArea=size.width*size.height;
  
  
  
                      if (newArea>resultArea) {
  
                          result=size;
  
                      }
  
                  }
  
              }
  
          }
  
  
  
          return(result);
  
      }
  
  
  
      //---------------------------------------------
  
      // camera thread, gets and encodes video data
  
      //---------------------------------------------
  
      private class CameraView extends SurfaceView implements SurfaceHolder.Callback, PreviewCallback {
  
  
  
          private final String TAG = CameraView.class.getSimpleName();
  
  
  
          private SurfaceHolder mHolder;
  
          private Camera mCamera;
  
  
  
          public CameraView(Context context, Camera camera) {
  
              super(context);
  
              if(Static.DEBUG) Log.i(TAG, "camera view");
  
  
  
              mCamera = camera;
  
  
  
              // Install a SurfaceHolder.Callback so we get notified when the
  
              // underlying surface is created and destroyed.
  
              mHolder = getHolder();
  
              mHolder.addCallback(CameraView.this);
  
              mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
  
              mCamera.setPreviewCallback(CameraView.this);
  
          }
  
  
  
          @Override
  
          public void surfaceCreated(SurfaceHolder holder) {
  
              try {
  
                  stopPreview();
  
                  mCamera.setPreviewDisplay(holder);
  
              } catch (IOException exception) {
  
                  mCamera.release();
  
                  mCamera = null;
  
              }
  
          }
  
  
  
          public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
  
              if(Static.DEBUG) Log.i(TAG, "surfaceChanged() => w=" + w + ", h=" + h);
  
  
  
              // If your preview can change or rotate, take care of those events here.
  
              // Make sure to stop the preview before resizing or reformatting it.
  
  
  
              if (mHolder.getSurface() == null){
  
                  // preview surface does not exist
  
                  return;
  
              }
  
  
  
              // stop preview before making changes
  
              try {
  
                  stopPreview();
  
              } catch (Exception e){
  
                  // ignore: tried to stop a non-existent preview
  
              }
  
  
  
              // start preview with new settings
  
              try {
  
                  Camera.Parameters params = mCamera.getParameters();
  
  
  
                  previewSize = getBestPreviewSize(w, h, params);
  
                  if(Static.DEBUG) Log.i(TAG, "getBestPreviewSize() => w=" + previewSize.width + ", h=" + previewSize.height);
  
                  if (previewSize != null)
  
                      params.setPreviewSize(previewSize.width, previewSize.height);
  
  
  
                  params.setPreviewFrameRate(recorderFrameRate);
  
                  if(Static.DEBUG) Log.i(TAG,"Preview Framerate: " + params.getPreviewFrameRate());
  
                  mCamera.setParameters(params);
  
                  mCamera.setPreviewDisplay(holder);
  
                  mCamera.setPreviewCallback(CameraView.this);
  
                  startPreview();
  
              } catch (Exception e){
  
                  if(Static.DEBUG) Log.i(TAG, "Could not set preview display in surfaceChanged");
  
                  e.printStackTrace();
  
              }
  
  
  
          }
  
  
  
          @Override
  
          public void surfaceDestroyed(SurfaceHolder holder) {
  
              try {
  
                  mHolder.addCallback(null);
  
                  mCamera.setPreviewCallback(null);
  
              } catch (RuntimeException e) {
  
                  // The camera has probably just been released, ignore.
  
              }
  
          }
  
  
  
          public void startPreview() {
  
              if (!isPreviewOn &amp;&amp; mCamera != null) {
  
                  isPreviewOn = true;
  
                  mCamera.startPreview();
  
              }
  
          }
  
  
  
          public void stopPreview() {
  
              if (isPreviewOn &amp;&amp; mCamera != null) {
  
                  isPreviewOn = false;
  
                  mCamera.stopPreview();
  
              }
  
          }
  
  
  
          @Override
  
          public void onPreviewFrame(byte[] data, Camera camera) {
  
              if (audioRecord == null || audioRecord.getRecordingState() != AudioRecord.RECORDSTATE_RECORDING) {
  
                  startTime = System.currentTimeMillis();
  
                  return;
  
              }
  
  
  
              // get video data
  
              if (yuvImage != null &amp;&amp; recording) {
  
                  ((ByteBuffer)yuvImage.image[0].position(0)).put(data);
  
  
  
                  try {
  
                      long t = 1000 * (System.currentTimeMillis() - startTime);
  
                      if(Static.DEBUG) Log.i(TAG,"Writing Frame on timestamp: "+t);
  
                      if (t > recorder.getTimestamp()) {
  
                          recorder.setTimestamp(t);
  
                      }
  
                      recorder.record(yuvImage);
  
                  } catch (FFmpegFrameRecorder.Exception e) {
  
                      if(Static.DEBUG) Log.i(TAG,e.getMessage());
  
                      e.printStackTrace();
  
                  }
  
              }
  
          }
  
      }
  
  }
  
  </string>

  activity_opencv.xml :

  <?xml version="1.0" encoding="utf-8"?>
  
  
  
  <relativelayout>
  
  
  
      <framelayout>
  
      </framelayout>
  
  
  
      &lt;ImageButton<br />
  
          android:id=&quot;@+id/btnStartRecord&quot;<br />
  
          android:layout_width=&quot;70dp&quot;<br />
  
          android:layout_height=&quot;70dp&quot;<br />
  
          android:scaleType=&quot;fitXY&quot;<br />
  
          android:src=&quot;@drawable/record_icon&quot;<br />
  
          android:background=&quot;@null&quot;<br />
  
          android:text=&quot;@string/btnStartRecord&quot;<br />
  
          android:onClick=&quot;onClickBtnStartRecord&quot;<br />
  
          android:clickable=&quot;true&quot;<br />
  
          android:layout_centerVertical=&quot;true&quot;<br />
  
          android:layout_alignParentRight=&quot;true&quot;<br />
  
          android:layout_alignParentEnd=&quot;true&quot;/&gt;
  
  
  
      <textview></textview>
  
  
  
  </relativelayout>

  Overlay views working, but recorded video is without overlay views.

• H264 Encoding - Could not play video using VLC Player

  31 mars 2016, par bot1131357

  I am have trouble encoding an H264 video correctly using FFmpeg libav. I could not play the encoded video in VLC media player, and although I could play the video on MPC-HC the time shows 00:00/00:00. Clearly I’m missing something.

  The Media info from MPC-HC shows this :

  General
  Format : AVC
  Format/Info : Advanced Video Codec
  File size : 110 KiB
  Duration : 2s 400ms
  Overall bit rate : 375 Kbps
  Writing library : x264 core 148 r2665 a01e339
  Encoding settings : cabac=0 / ref=3 / deblock=1:0:0 / analyse=0x1:0x111 / me=hex / subme=7 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=0 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-2 / threads=7 / lookahead_threads=1 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=0 / weightp=0 / keyint=12 / keyint_min=1 / scenecut=40 / intra_refresh=0 / rc_lookahead=12 / rc=abr / mbtree=1 / bitrate=2000 / ratetol=1.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / ip_ratio=1.40 / aq=1:1.00

  Video
  Format : AVC
  Format/Info : Advanced Video Codec
  Format profile : Baseline@L2.1
  Format settings, CABAC : No
  Format settings, ReFrames : 3 frames
  Format settings, GOP : M=1, N=12
  Duration : 2s 400ms
  Bit rate : 2 000 Kbps
  Width : 320 pixels
  Height : 240 pixels
  Display aspect ratio : 4:3
  Frame rate mode : Variable
  Frame rate : 20.833 fps
  Color space : YUV
  Chroma subsampling : 4:2:0
  Bit depth : 8 bits
  Scan type : Progressive
  Bits/(Pixel*Frame) : 1.250
  Stream size : 586 KiB
  Writing library : x264 core 148 r2665 a01e339
  Encoding settings : cabac=0 / ref=3 / deblock=1:0:0 / analyse=0x1:0x111 / me=hex / subme=7 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=0 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-2 / threads=7 / lookahead_threads=1 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=0 / weightp=0 / keyint=12 / keyint_min=1 / scenecut=40 / intra_refresh=0 / rc_lookahead=12 / rc=abr / mbtree=1 / bitrate=2000 / ratetol=1.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / ip_ratio=1.40 / aq=1:1.00

  I noticed something odd in the above info :
   The frame rate is 20.833 fps, instead of the specified 10 fps.
   Duration of 2s 400ms did not seem right either, since the video played for more than 4s.

  Also, (AVFrame* picture)->pict_type is always set to AV_PICTURE_TYPE_NONE. I don’t think this is normal.

  The library that I’m using is ffmpeg-20160219-git-98a0053-win32-dev. I would really really appreciate if you could help me out of this confusion.

  /*
  
   * Video encoding example
  
   */
  
  char filename[] = "test.mp4";
  
  int main(int argc, char** argv)
  
  {
  
      AVCodec *codec = NULL;
  
      AVCodecContext *codecCtx= NULL;
  
      AVFormatContext *pFormatCtx = NULL;
  
      AVStream * pVideoStream = NULL;
  
      AVFrame *picture = NULL;
  
  
  
      int i, x, y,            //
  
          ret,                // Return value
  
          got_packet_ptr;     // Data encoded into packet
  
  
  
      printf("Video encoding\n");
  
  
  
      // Register all formats and codecs
  
      av_register_all();
  
  
  
      // allocate context
  
      pFormatCtx = avformat_alloc_context();
  
      memcpy(pFormatCtx->filename,filename,
  
          min(strlen(filename), sizeof(pFormatCtx->filename)));
  
  
  
      // guess format
  
      pFormatCtx->oformat = av_guess_format("h264", NULL, NULL);
  
      if (NULL==pFormatCtx->oformat)
  
      {
  
          cerr << "Could not guess output format" << endl;
  
          return -1;
  
      }   
  
  
  
      // Find the codec.
  
      codec = avcodec_find_encoder(pFormatCtx->oformat->video_codec);
  
      if (codec == NULL) {
  
          fprintf(stderr, "Codec not found\n");
  
          return -1;
  
      }
  
  
  
      // Set context
  
      int framerate = 10;
  
      codecCtx = avcodec_alloc_context3(codec);
  
      avcodec_get_context_defaults3(codecCtx, codec); 
  
      codecCtx->pix_fmt = AV_PIX_FMT_YUV420P;
  
      codecCtx->profile = FF_PROFILE_H264_BASELINE; 
  
      // Resolution must be a multiple of two.
  
      codecCtx->width  = 320;
  
      codecCtx->height = 240;
  
  
  
      codecCtx->bit_rate = 2000000;
  
      codecCtx->time_base.den = framerate;
  
      codecCtx->time_base.num = 1;
  
      codecCtx->gop_size = 12; // emit one intra frame every twelve frames at most
  
  
  
      // Open the codec.  
  
      if (avcodec_open2(codecCtx, codec, NULL) < 0) 
  
      {
  
          printf("Cannot open video codec\n");
  
          return -1;
  
      }
  
  
  
      // Add stream to pFormatCtx
  
      pVideoStream = avformat_new_stream(pFormatCtx, codec);
  
      if (!pVideoStream) 
  
      {
  
          printf("Cannot add new video stream\n");
  
          return -1;
  
      }
  
      pVideoStream->codec = codecCtx;
  
      pVideoStream->time_base.den = framerate;
  
      pVideoStream->time_base.num = 1;
  
  
  
      if (avio_open2(&pFormatCtx->pb, filename, AVIO_FLAG_WRITE, NULL, NULL) < 0) 
  
      {
  
          printf("Cannot open file\n");
  
          return -1;
  
      }
  
  
  
      // Write file header.
  
      avformat_write_header(pFormatCtx, NULL);
  
  
  
      // Create frame
  
      picture= av_frame_alloc();
  
      picture->format = codecCtx->pix_fmt;
  
      picture->width  = codecCtx->width;
  
      picture->height = codecCtx->height;
  
  
  
      int bufferImgSize = av_image_get_buffer_size(codecCtx->pix_fmt, codecCtx->width,
  
                      codecCtx->height,1);    
  
      av_image_alloc(picture->data, picture->linesize, codecCtx->width, codecCtx->height,                 codecCtx->pix_fmt, 32);
  
  
  
      AVPacket avpkt;
  
  
  
      /* encode 1 second of video */
  
      for(i=0;i<50;i++) 
  
      {
  
          /* prepare a dummy image */
  
          /* Y */
  
          for(y=0;yheight;y++)
  
          {
  
              for(x=0;xwidth;x++) 
  
              {
  
                  picture->data[0][y * picture->linesize[0] + x] = x + y + i * 3;
  
              }
  
          }
  
          /* Cb and Cr */
  
          for(y=0;yheight/2;y++) 
  
          {
  
              for(x=0;xwidth/2;x++) 
  
              {
  
                  picture->data[1][y * picture->linesize[1] + x] = 128 + y + i * 2;
  
                  picture->data[2][y * picture->linesize[2] + x] = 64 + x + i * 5;
  
              }
  
          }
  
  
  
          // Get timestamp
  
          picture->pts = (float) i * (1000.0/(float)(codecCtx->time_base.den)) * 90; 
  
  
  
          // Encode frame to packet
  
          av_init_packet(&avpkt);
  
          got_packet_ptr = 0;
  
          int error = avcodec_encode_video2(codecCtx, &avpkt, picture, &got_packet_ptr);
  
          if (!error && got_packet_ptr > 0) 
  
          {
  
              // Write packet with frame.
  
              ret = (av_interleaved_write_frame(pFormatCtx, &avpkt) == 0);        
  
          }   
  
          av_packet_unref(&avpkt); 
  
      }
  
  
  
      // Flush remaining encoded data
  
      while(1)
  
      {
  
          av_init_packet(&avpkt);
  
          got_packet_ptr = 0;
  
          // Encode frame to packet.
  
          int error = avcodec_encode_video2(codecCtx, &avpkt, NULL, &got_packet_ptr);
  
          if (!error && got_packet_ptr > 0) 
  
          {
  
              // Write packet with frame.
  
              ret = (av_interleaved_write_frame(pFormatCtx, &avpkt) == 0);        
  
          } 
  
          else 
  
          {
  
              break;
  
          }
  
          av_packet_unref(&avpkt); 
  
      }
  
      av_write_trailer(pFormatCtx);
  
  
  
      av_packet_unref(&avpkt);
  
      av_frame_free(&picture);
  
  
  
      avcodec_close(codecCtx);
  
      av_free(codecCtx);
  
  
  
      cin.get();
  
  }

• squeeze image while capturing video with FFmpegFrameRecorder

  12 avril 2016, par Saty

  I am trying to stream video with FFmpegFrameRecorder using javacv. All are working great except I find videos which are actually images are bit squeeze from the height.

  I am using the below code which half of the internet community is using to live stream

  public class MainActivity extends Activity implements OnClickListener {
  
  
  
  private final static String LOG_TAG = "MainActivity";
  
  
  
  private PowerManager.WakeLock mWakeLock;
  
  
  
  private String ffmpeg_link = "rtmp://username:password@xxx.xxx.xxx.xxx:1935/live/test.flv";
  
  //private String ffmpeg_link = "/mnt/sdcard/new_stream.flv";
  
  
  
  private volatile FFmpegFrameRecorder recorder;
  
  boolean recording = false;
  
  long startTime = 0;
  
  
  
  private int sampleAudioRateInHz = 44100;
  
  private int imageWidth = 320;
  
  private int imageHeight = 240;
  
  private int frameRate = 30;
  
  
  
  private Thread audioThread;
  
  volatile boolean runAudioThread = true;
  
  private AudioRecord audioRecord;
  
  private AudioRecordRunnable audioRecordRunnable;
  
  
  
  private CameraView cameraView;
  
  private IplImage yuvIplimage = null;
  
  
  
  private Button recordButton;
  
  private LinearLayout mainLayout;
  
  
  
  @Override
  
  public void onCreate(Bundle savedInstanceState) {
  
      super.onCreate(savedInstanceState);
  
  
  
      setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
  
      setContentView(R.layout.activity_main);
  
  
  
      initLayout();
  
      initRecorder();
  
  }
  
  
  
  @Override
  
  protected void onResume() {
  
      super.onResume();
  
  
  
      if (mWakeLock == null) {
  
          PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE); 
  
          mWakeLock = pm.newWakeLock(PowerManager.SCREEN_BRIGHT_WAKE_LOCK, LOG_TAG); 
  
          mWakeLock.acquire(); 
  
      }
  
  }
  
  
  
  @Override
  
  protected void onPause() {
  
      super.onPause();
  
  
  
      if (mWakeLock != null) {
  
          mWakeLock.release();
  
          mWakeLock = null;
  
      }
  
  }
  
  
  
  @Override
  
  protected void onDestroy() {
  
      super.onDestroy();
  
  
  
      recording = false;
  
  }
  
  
  
  
  
  private void initLayout() {
  
  
  
      mainLayout = (LinearLayout) this.findViewById(R.id.record_layout);
  
  
  
      recordButton = (Button) findViewById(R.id.recorder_control);
  
      recordButton.setText("Start");
  
      recordButton.setOnClickListener(this);
  
  
  
      cameraView = new CameraView(this);
  
  
  
      LinearLayout.LayoutParams layoutParam = new LinearLayout.LayoutParams(imageWidth, imageHeight);        
  
      mainLayout.addView(cameraView, layoutParam);
  
      Log.v(LOG_TAG, "added cameraView to mainLayout");
  
  }
  
  
  
  private void initRecorder() {
  
      Log.w(LOG_TAG,"initRecorder");
  
  
  
      if (yuvIplimage == null) {
  
          // Recreated after frame size is set in surface change method
  
          yuvIplimage = IplImage.create(imageWidth, imageHeight, IPL_DEPTH_8U, 2);
  
          //yuvIplimage = IplImage.create(imageWidth, imageHeight, IPL_DEPTH_32S, 2);
  
  
  
          Log.v(LOG_TAG, "IplImage.create");
  
      }
  
  
  
      recorder = new FFmpegFrameRecorder(ffmpeg_link, imageWidth, imageHeight, 1);
  
      Log.v(LOG_TAG, "FFmpegFrameRecorder: " + ffmpeg_link + " imageWidth: " + imageWidth + " imageHeight " + imageHeight);
  
  
  
      recorder.setFormat("flv");
  
      Log.v(LOG_TAG, "recorder.setFormat(\"flv\")");
  
  
  
      recorder.setSampleRate(sampleAudioRateInHz);
  
      Log.v(LOG_TAG, "recorder.setSampleRate(sampleAudioRateInHz)");
  
  
  
      // re-set in the surface changed method as well
  
      recorder.setFrameRate(frameRate);
  
      Log.v(LOG_TAG, "recorder.setFrameRate(frameRate)");
  
  
  
      // Create audio recording thread
  
      audioRecordRunnable = new AudioRecordRunnable();
  
      audioThread = new Thread(audioRecordRunnable);
  
  }
  
  
  
  // Start the capture
  
  public void startRecording() {
  
      try {
  
          recorder.start();
  
          startTime = System.currentTimeMillis();
  
          recording = true;
  
          audioThread.start();
  
      } catch (FFmpegFrameRecorder.Exception e) {
  
          e.printStackTrace();
  
      }
  
  }
  
  
  
  public void stopRecording() {
  
      // This should stop the audio thread from running
  
      runAudioThread = false;
  
  
  
      if (recorder != null && recording) {
  
          recording = false;
  
          Log.v(LOG_TAG,"Finishing recording, calling stop and release on recorder");
  
          try {
  
              recorder.stop();
  
              recorder.release();
  
          } catch (FFmpegFrameRecorder.Exception e) {
  
              e.printStackTrace();
  
          }
  
          recorder = null;
  
      }
  
  }
  
  
  
  @Override
  
  public boolean onKeyDown(int keyCode, KeyEvent event) {
  
      // Quit when back button is pushed
  
      if (keyCode == KeyEvent.KEYCODE_BACK) {
  
          if (recording) {
  
              stopRecording();
  
          }
  
          finish();
  
          return true;
  
      }
  
      return super.onKeyDown(keyCode, event);
  
  }
  
  
  
  @Override
  
  public void onClick(View v) {
  
      if (!recording) {
  
          startRecording();
  
          Log.w(LOG_TAG, "Start Button Pushed");
  
          recordButton.setText("Stop");
  
      } else {
  
          stopRecording();
  
          Log.w(LOG_TAG, "Stop Button Pushed");
  
          recordButton.setText("Start");
  
      }
  
  }
  
  
  
  //---------------------------------------------
  
  // audio thread, gets and encodes audio data
  
  //---------------------------------------------
  
  class AudioRecordRunnable implements Runnable {
  
  
  
      @Override
  
      public void run() {
  
          // Set the thread priority
  
          android.os.Process.setThreadPriority(android.os.Process.THREAD_PRIORITY_URGENT_AUDIO);
  
  
  
          // Audio
  
          int bufferSize;
  
          short[] audioData;
  
          int bufferReadResult;
  
  
  
          bufferSize = AudioRecord.getMinBufferSize(sampleAudioRateInHz, 
  
                  AudioFormat.CHANNEL_CONFIGURATION_MONO, AudioFormat.ENCODING_PCM_16BIT);
  
          audioRecord = new AudioRecord(MediaRecorder.AudioSource.MIC, sampleAudioRateInHz, 
  
                  AudioFormat.CHANNEL_CONFIGURATION_MONO, AudioFormat.ENCODING_PCM_16BIT, bufferSize);
  
  
  
          audioData = new short[bufferSize];
  
  
  
          Log.d(LOG_TAG, "audioRecord.startRecording()");
  
          audioRecord.startRecording();
  
  
  
          // Audio Capture/Encoding Loop
  
          while (runAudioThread) {
  
              // Read from audioRecord
  
              bufferReadResult = audioRecord.read(audioData, 0, audioData.length);
  
              if (bufferReadResult > 0) {
  
                  //Log.v(LOG_TAG,"audioRecord bufferReadResult: " + bufferReadResult);
  
  
  
                  // Changes in this variable may not be picked up despite it being "volatile"
  
                  if (recording) {
  
                      try {
  
                          // Write to FFmpegFrameRecorder
  
                          Buffer[] buffer = {ShortBuffer.wrap(audioData, 0, bufferReadResult)};                        
  
                          recorder.record(buffer);
  
                      } catch (FFmpegFrameRecorder.Exception e) {
  
                          Log.v(LOG_TAG,e.getMessage());
  
                          e.printStackTrace();
  
                      }
  
                  }
  
              }
  
          }
  
          Log.v(LOG_TAG,"AudioThread Finished");
  
  
  
          /* Capture/Encoding finished, release recorder */
  
          if (audioRecord != null) {
  
              audioRecord.stop();
  
              audioRecord.release();
  
              audioRecord = null;
  
              Log.v(LOG_TAG,"audioRecord released");
  
          }
  
      }
  
  }
  
  
  
  class CameraView extends SurfaceView implements SurfaceHolder.Callback, PreviewCallback {
  
  
  
      private boolean previewRunning = false;
  
  
  
      private SurfaceHolder holder;
  
      private Camera camera;
  
  
  
      private byte[] previewBuffer;
  
  
  
      long videoTimestamp = 0;
  
  
  
      Bitmap bitmap;
  
      Canvas canvas;
  
  
  
      public CameraView(Context _context) {
  
          super(_context);
  
  
  
          holder = this.getHolder();
  
          holder.addCallback(this);
  
          holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
  
      }
  
  
  
      @Override
  
      public void surfaceCreated(SurfaceHolder holder) {
  
          camera = Camera.open();
  
  
  
          try {
  
              camera.setPreviewDisplay(holder);
  
              camera.setPreviewCallback(this);
  
  
  
              Camera.Parameters currentParams = camera.getParameters();
  
              Log.v(LOG_TAG,"Preview Framerate: " + currentParams.getPreviewFrameRate());
  
              Log.v(LOG_TAG,"Preview imageWidth: " + currentParams.getPreviewSize().width + " imageHeight: " + currentParams.getPreviewSize().height);
  
  
  
              // Use these values
  
              imageWidth = currentParams.getPreviewSize().width;
  
              imageHeight = currentParams.getPreviewSize().height;
  
              frameRate = currentParams.getPreviewFrameRate();                
  
  
  
              bitmap = Bitmap.createBitmap(imageWidth, imageHeight, Bitmap.Config.ALPHA_8);
  
  
  
  
  
              /*
  
              Log.v(LOG_TAG,"Creating previewBuffer size: " + imageWidth * imageHeight * ImageFormat.getBitsPerPixel(currentParams.getPreviewFormat())/8);
  
              previewBuffer = new byte[imageWidth * imageHeight * ImageFormat.getBitsPerPixel(currentParams.getPreviewFormat())/8];
  
              camera.addCallbackBuffer(previewBuffer);
  
              camera.setPreviewCallbackWithBuffer(this);
  
              */              
  
  
  
              camera.startPreview();
  
              previewRunning = true;
  
          }
  
          catch (IOException e) {
  
              Log.v(LOG_TAG,e.getMessage());
  
              e.printStackTrace();
  
          }   
  
      }
  
  
  
      public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
  
          Log.v(LOG_TAG,"Surface Changed: width " + width + " height: " + height);
  
  
  
          // We would do this if we want to reset the camera parameters
  
          /*
  
          if (!recording) {
  
              if (previewRunning){
  
                  camera.stopPreview();
  
              }
  
              try {
  
                  //Camera.Parameters cameraParameters = camera.getParameters();
  
                  //p.setPreviewSize(imageWidth, imageHeight);
  
                  //p.setPreviewFrameRate(frameRate);
  
                  //camera.setParameters(cameraParameters);
  
  
  
                  camera.setPreviewDisplay(holder);
  
                  camera.startPreview();
  
                  previewRunning = true;
  
              }
  
              catch (IOException e) {
  
                  Log.e(LOG_TAG,e.getMessage());
  
                  e.printStackTrace();
  
              }   
  
          }            
  
          */
  
  
  
          // Get the current parameters
  
          Camera.Parameters currentParams = camera.getParameters();
  
          Log.v(LOG_TAG,"Preview Framerate: " + currentParams.getPreviewFrameRate());
  
          Log.v(LOG_TAG,"Preview imageWidth: " + currentParams.getPreviewSize().width + " imageHeight: " + currentParams.getPreviewSize().height);
  
  
  
          // Use these values
  
          imageWidth = currentParams.getPreviewSize().width;
  
          imageHeight = currentParams.getPreviewSize().height;
  
          frameRate = currentParams.getPreviewFrameRate();
  
  
  
          // Create the yuvIplimage if needed
  
          yuvIplimage = IplImage.create(imageWidth, imageHeight, IPL_DEPTH_8U, 2);
  
          //yuvIplimage = IplImage.create(imageWidth, imageHeight, IPL_DEPTH_32S, 2);
  
      }
  
  
  
      @Override
  
      public void surfaceDestroyed(SurfaceHolder holder) {
  
          try {
  
              camera.setPreviewCallback(null);
  
  
  
              previewRunning = false;
  
              camera.release();
  
  
  
          } catch (RuntimeException e) {
  
              Log.v(LOG_TAG,e.getMessage());
  
              e.printStackTrace();
  
          }
  
      }
  
  
  
      @Override
  
      public void onPreviewFrame(byte[] data, Camera camera) {
  
  
  
          if (yuvIplimage != null && recording) {
  
              videoTimestamp = 1000 * (System.currentTimeMillis() - startTime);
  
  
  
              // Put the camera preview frame right into the yuvIplimage object
  
              yuvIplimage.getByteBuffer().put(data);
  
  
  
              // FAQ about IplImage:
  
              // - For custom raw processing of data, getByteBuffer() returns an NIO direct
  
              //   buffer wrapped around the memory pointed by imageData, and under Android we can
  
              //   also use that Buffer with Bitmap.copyPixelsFromBuffer() and copyPixelsToBuffer().
  
              // - To get a BufferedImage from an IplImage, we may call getBufferedImage().
  
              // - The createFrom() factory method can construct an IplImage from a BufferedImage.
  
              // - There are also a few copy*() methods for BufferedImage<->IplImage data transfers.
  
  
  
              // Let's try it..
  
              // This works but only on transparency
  
              // Need to find the right Bitmap and IplImage matching types
  
  
  
              /*
  
              bitmap.copyPixelsFromBuffer(yuvIplimage.getByteBuffer());
  
              //bitmap.setPixel(10,10,Color.MAGENTA);
  
  
  
              canvas = new Canvas(bitmap);
  
              Paint paint = new Paint(); 
  
              paint.setColor(Color.GREEN);
  
              float leftx = 20; 
  
              float topy = 20; 
  
              float rightx = 50; 
  
              float bottomy = 100; 
  
              RectF rectangle = new RectF(leftx,topy,rightx,bottomy); 
  
              canvas.drawRect(rectangle, paint);
  
  
  
              bitmap.copyPixelsToBuffer(yuvIplimage.getByteBuffer());
  
              */
  
              //Log.v(LOG_TAG,"Writing Frame");
  
  
  
              try {
  
  
  
                  // Get the correct time
  
                  recorder.setTimestamp(videoTimestamp);
  
  
  
                  // Record the image into FFmpegFrameRecorder
  
                  recorder.record(yuvIplimage);
  
  
  
              } catch (FFmpegFrameRecorder.Exception e) {
  
                  Log.v(LOG_TAG,e.getMessage());
  
                  e.printStackTrace();
  
              }
  
          }
  
      }
  
  }

  }