Question

我正在使用opencv从原始数据编写视频。这个视频工作正常。但是当我尝试从混合图像创建视频（在每个原始图像上添加一个矩形）然后写入视频时，它会给出编解码器错误。我使用以下代码：

 #define drawCross( img, center, color, d ,d1 )\
 line(img, Point(center.x - d - 20, center.y ), Point(center.x + d + 20, center.y ), color, 1, CV_AA, 0);\
 line(img, Point(center.x , center.y - d), Point(center.x , center.y + d), color, 1, CV_AA, 0 );\
 line(img, Point(center.x-d1-20 , center.y-d1 ), Point(center.x-d1-20, center.y - d ), color, 1, CV_AA, 0 );\
 line(img, Point(center.x-d1-20 , center.y-d1 ), Point(center.x-d -20, center.y - d1), color, 1, CV_AA, 0 );\
 line(img, Point(center.x-d1-20 , center.y+d1 ), Point(center.x-d1-20, center.y + d ), color, 1, CV_AA, 0 );\
 line(img, Point(center.x-d1-20 , center.y+d1 ), Point(center.x-d -20, center.y + d1), color, 1, CV_AA, 0 );\
 line(img, Point(center.x+d1+20 , center.y - d1 ), Point(center.x+d+20 , center.y - d1), color, 1, CV_AA, 0 );\
 line(img, Point(center.x+d1+20 , center.y - d1 ), Point(center.x+d1+20 , center.y - d), color, 1, CV_AA, 0 );\
 line(img, Point(center.x+d1+20 , center.y + d1 ), Point(center.x+d1+20 , center.y + d), color, 1, CV_AA, 0 );\
 line(img, Point(center.x+d1+20 , center.y + d1 ), Point(center.x+d+20 , center.y + d1), color, 1, CV_AA, 0 );\




int main(int argc, char *argv[])
{
  std::stringstream s;
  string storedCorrect;
  Mat frame;
  Mat result = Mat::zeros(frame.size(), frame.type());
  int key=0;
  CvCapture* capture = cvCaptureFromAVI("zoomRecord.avi");
  cvNamedWindow( "My_Win" );
  //'X', 'V', 'I', 'D'
   VideoWriter outputVideo;

 int wwidth = 1392;
 int wheight = 798;

 outputVideo.open("MyVideo.avi", CV_FOURCC('X','V','I','D'), 25,
                   cvSize(wwidth,wheight),true);
 //outputVideo.open ( "outputVideo.avi", CV_FOURCC('D','I','V','X'), 25, Size(1392,798), true);//'D','I','V','X'
  if (!outputVideo.isOpened())
{
    cout  << "Could not open the output video for write: " << endl;
    return -1;
}


cout<<"start"<<endl;
int i=0;
while(key!='q')
{
    frame=cvQueryFrame(capture);
    Mat mask = Mat::zeros(frame.size(), frame.type());

    cout<<"Frame number : "<<i<<endl;
    i++;

    s <<" Frame Rate : 25 ";
    storedCorrect = s.str();
    s.str(" ");
    //putText (mask,storedCorrect,cvPoint(450,450),FONT_HERSHEY_SIMPLEX, 0.6, cvScalar(150,150,150), 1.5, CV_AA);
    drawCross(mask,Point(frame.cols/2,frame.rows/2) , Scalar(120, 120, 120),50,50);
    addWeighted(frame,1,mask,-0.3,0,result,1);

    cout<<result.cols<<"   "<<result.rows<<endl;

    outputVideo.write(result);
    imshow("My_Win", result);

    //cout<<"size : "<<result.size()<<endl;

    key=waitKey(2);
}
cout<<"done"<<endl;

}

在opencv中混合时视频无法正常工作

0 个答案: