Opencv -- write the camera into a video file

We mainly use Opencv to open the camera code and write the video function. However, we only need to note that the camera does not seem to have a frame rate. In cvCreateVideoWriter, we need to set it by ourselves.

1 # include "cv. h "2 # include" highgui. h "3 4 int main (int argc, char ** argv) 5 {6 cvNamedWindow (" camera ", CV_WINDOW_AUTOSIZE); 7 argc = 1; 8 CvCapture * capture; 9 capture = cvCreateCameraCapture (1); // if it cannot be changed to-, 1, try 10 assert (capture! = NULL); 11 IplImage * frame; 12 CvSize size = cvSize (int) cvGetCaptureProperty (capture, CV_CAP_PROP_FRAME_WIDTH), 13 (int) cvGetCaptureProperty (capture, CV_CAP_PROP_FRAME_HEIGHT )); 14 15 double fps = cvGetCaptureProperty (16 capture, 17 CV_CAP_PROP_FPS // frame rate 18 ); 19 CvVideoWriter * writer = cvCreateVideoWriter (// On linux Will only work if you 've installed ffmpeg development files correctly, 20 "D: \ Opencv \\ TestData \ camera. avi ", // otherwise segmentation fault. windows probably better.21 CV_FOURCC ('D', 'x', '5', '0'), 22 15, // The Frame Rate of the camera is 0, it is set to 1523 size24); 25 IplImage * imgWrite = cvCreateImage (size, 8, 3); 26 while (1) {27 frame = cvQueryFrame (capture); 28 if (! Frame) 29 break; 30 char c = cvWaitKey (10); 31 if (c = 27) break; 32 cvCopy (frame, imgWrite); 33 cvWriteToAVI (writer, imgWrite ); 34 cvShowImage ("camera", frame); 35} 36 37 cvReleaseCapture (& capture); 38 cvReleaseVideoWriter (& writer); 39 cvDestroyWindow ("camera"); 40 return 0; 41}