Recherche avancée

Sur d’autres sites (4564)

• Specify timestamp in ffmpeg video segment command

  25 mars 2019, par Soumya

  I have a continuous RTSP stream coming from a camera over the network.
  I want to dump the stream but in video files of length 1 min each.

  I an using the following command

  ffmpeg -i "rtsp://user:pass@example.com"  -f mp4 -r 12 -s 640x480 -ar 44100 \
  
  -ac 1 -segment_time 60 -segment_format mp4 "out%03d.mp4"

  The name of the files being created are of the form out001.mp4, out002.mp4, etc.

  I want to include the timestamp (hour and minute) in the name of the file segments eg. 09-30.mp4, 09-31.mp4, etc.

  If it is mandatory to provide a serial number for the segment, is it possible to get something like 09-30-001.mp4, 09-31-002.mp4 ?

• Specify timestamp in ffmpeg video segment command

  12 mai 2015, par Soumya

  I have a continuous RTSP stream coming from a camera over the network.
  I want to dump the stream but in video files of length 1 min each.

  I an using the following command

  ffmpeg -i "rtsp://user:pass@example.com"  -f mp4 -r 12 -s 640x480 -ar 44100 \
  
  -ac 1 -segment_time 60 -segment_format mp4 "out%03d.mp4"

  The name of the files being created are of the form out001.mp4, out002.mp4, etc.

  I want to include the timestamp (hour and minute) in the name of the file segments eg. 09-30.mp4, 09-31.mp4, etc.

  If it is mandatory to provide a serial number for the segment, is it possible to get something like 09-30-001.mp4, 09-31-002.mp4 ?

• IplImage crop and rotate - Android

  26 février 2015, par Ganesh

  I’m using ffmpeg to video capture for 30 seconds.

  @Override
  
          public void onPreviewFrame(byte[] data, Camera camera) {
  
              if (yuvIplimage != null && recording && rec) 
  
                  {
  
                      new SaveFrame().execute(data);
  
                  }
  
              }
  
          }

  save frame class is below

  private class SaveFrame extends AsyncTask {
  
              long t;
  
              protected File doInBackground(byte[]... arg) {
  
  
  
                  t = 1000 * (System.currentTimeMillis() - firstTime - pausedTime);
  
                  toSaveFrames++;
  
                  File pathCache = new File(Environment.getExternalStorageDirectory()+"/DCIM", (System.currentTimeMillis() / 1000L)+ "_" + toSaveFrames + ".tmp");
  
                  BufferedOutputStream bos;
  
                  try {
  
                      bos = new BufferedOutputStream(new FileOutputStream(pathCache));
  
                      bos.write(arg[0]);
  
                      bos.flush();
  
                      bos.close();
  
                  } catch (FileNotFoundException e) {
  
                      e.printStackTrace();
  
                      pathCache = null;
  
                      toSaveFrames--;
  
                  } catch (IOException e) {
  
                      e.printStackTrace();
  
                      pathCache = null;
  
                      toSaveFrames--;
  
                  }
  
                  return pathCache;
  
  
  
  
  
              }
  
              @Override
  
              protected void onPostExecute(File filename)
  
              {
  
                  if(filename!=null)
  
                  {
  
                      savedFrames++;
  
                      tempList.add(new FileFrame(t,filename));
  
                  }
  
              }
  
          }

  finally i add all frames with crop and rotation

  private class AddFrame extends AsyncTask {
  
          private int serial = 0;
  
          @Override
  
          protected Void doInBackground(Void... params) {
  
  
  
              for(int i=0; i/                                      final int startY = 640*(480-480)/2;
  
  //                                      final int lenY = 640*480;
  
  //                                      yuvIplimage.getByteBuffer().put(bytes, startY, lenY);
  
  //                                      final int startVU = 640*480+ 640*(480-480)/4;
  
  //                                      final int lenVU = 640* 480/2;
  
  //                                      yuvIplimage.getByteBuffer().put(bytes, startVU, lenVU);
  
  
  
                      if (tempList.get(i).time > recorder.getTimestamp()) {
  
                          recorder.setTimestamp(tempList.get(i).time);
  
                      }
  
  
  
                      image = cropImage(image);
  
                      image = rotate(image, 270);
  
  //                                       image = rotateImage(image);
  
                      recorder.record(image);
  
                      Log.i(LOG_TAG, "record " + i);
  
                      image = null;
  
                      serial++;
  
                      publishProgress(serial);
  
                  } catch (FileNotFoundException e) {
  
                      e.printStackTrace();
  
                  } catch (IOException e) {
  
                      e.printStackTrace();
  
                  } catch (com.googlecode.javacv.FrameRecorder.Exception e) {
  
                      e.printStackTrace();
  
                  }
  
              }
  
              return null;
  
          }
  
          @Override
  
          protected void onProgressUpdate(Integer... serial) {
  
              int value = serial[0];
  
              creatingProgress.setProgress(value);
  
          }
  
          @Override
  
          protected void onPostExecute(Void v)
  
          {
  
              creatingProgress.dismiss();
  
              if (recorder != null && recording) {
  
                  recording = false;
  
                  Log.v(LOG_TAG,"Finishing recording, calling stop and release on recorder");
  
                  try {
  
                      recorder.stop();
  
                      recorder.release();
  
                      finish();
  
                      startActivity(new Intent(RecordActivity.this,AnswerViewActivity.class));
  
                  } catch (FFmpegFrameRecorder.Exception e) {
  
                      e.printStackTrace();
  
                  }
  
                  recorder = null;
  
              }
  
          }
  
      }

  my crop and rotate method are below

  private IplImage cropImage(IplImage src)
  
      {
  
          cvSetImageROI(src, r);
  
          IplImage cropped = IplImage.create(imageHeight, imageHeight, IPL_DEPTH_8U, 2);
  
          cvCopy(src, cropped);
  
          return cropped;
  
      }
  
  
  
      public static IplImage rotate(IplImage image, double angle) {        
  
          IplImage copy = opencv_core.cvCloneImage(image);
  
  
  
          IplImage rotatedImage = opencv_core.cvCreateImage(opencv_core.cvGetSize(copy), copy.depth(), copy.nChannels()); 
  
          CvMat mapMatrix = opencv_core.cvCreateMat( 2, 3, opencv_core.CV_32FC1 );
  
  
  
          //Define Mid Point
  
          CvPoint2D32f centerPoint = new CvPoint2D32f();
  
          centerPoint.x(copy.width()/2);
  
          centerPoint.y(copy.height()/2);
  
  
  
          //Get Rotational Matrix
  
          opencv_imgproc.cv2DRotationMatrix(centerPoint, angle, 1.0, mapMatrix);
  
  
  
          //Rotate the Image
  
          opencv_imgproc.cvWarpAffine(copy, rotatedImage, mapMatrix, opencv_imgproc.CV_INTER_CUBIC +  opencv_imgproc.CV_WARP_FILL_OUTLIERS, opencv_core.cvScalarAll(170));
  
          opencv_core.cvReleaseImage(copy);
  
          opencv_core.cvReleaseMat(mapMatrix);        
  
          return rotatedImage;
  
      }

  my final video crop and rotate but green frames and colored frames mixed with this.

  How to fix this problem. I’m not aware of iplimage. In some blogs they mention its YUV format. first u need to convert Y and then convert UV.

  How to solve this problem ?