Opencv——將攝像頭拍攝寫成視頻文件

這裏主要利用了Opencv打開攝像頭的代碼，以及寫入視頻的函數，只是這裏要注意的是攝像頭好像沒有幀率，在cvCreateVideoWriter，時要本身設置

 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);//若是不行換成-1,0,1試試
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//幀率
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,//攝像頭好像幀率獲取出來爲0，故設爲15
23                 size
24                 );
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 }