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reading a video with opencv

asked 2013-02-12 07:30:50 -0500

engine gravatar image

Hi! I have a video engine2.avi that I want to read and show with openCV. here 's the code that I used:

  #include <opencv2/core/core.hpp>
  #include <opencv2/highgui/highgui.hpp>
  #include <iostream>

  using namespace cv;

  int main(int argc, char** argv)
{
string filename = "D:\\BMDvideos\\engine2.avi";
VideoCapture capture(filename);
Mat frame;

if( !capture.isOpened() )
    throw "Error when reading steam_avi";

namedWindow( "w", 1);
for( ; ; )
{
    capture >> frame;
  //  if(!frame)
   //     break;
    imshow("w", frame);
    waitKey(20); // waits to display frame
}
waitKey(0); }

this code doesn't work if I the file has the codec YUV 4:2:2 (UYVY)(I record the video using Direct-Show), but works when I use a video that grabbed whit openCV !! has anybody an Idea how this could work ? thanks in advance

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answered 2013-02-12 08:05:44 -0500

This is known OpenCV issue. There are some problems with loading non-compressed video files using FFMPEG back-end.

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thanks Alexander for your answer but in this page they didn't solve it, I'm use OpenCV 242 and my video is 1920x1080 with 25fps

engine gravatar imageengine ( 2013-02-12 08:17:18 -0500 )edit
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Asked: 2013-02-12 07:30:50 -0500

Seen: 1,127 times

Last updated: Feb 12 '13