Created
June 19, 2018 14:49
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opencv播放视频
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| #include <opencv2/opencv.hpp> | |
| using namespace std; | |
| using namespace cv; | |
| int main() | |
| { | |
| //打开视频文件 | |
| VideoCapture capture(0); //"1.mp4" | |
| //isOpen判断视频是否打开成功 | |
| if (!capture.isOpened()) | |
| { | |
| cout << "Movie open Error" << endl; | |
| return -1; | |
| } | |
| //获取视频帧频 | |
| double rate = capture.get(CV_CAP_PROP_FPS); | |
| cout << "帧率为:" << " " << rate << endl; | |
| cout << "总帧数为:" << " " << capture.get(CV_CAP_PROP_FRAME_COUNT) << endl;//输出帧总数 | |
| namedWindow("Movie Player"); | |
| Mat frame; //定义一个Mat变量，用于存储每一帧的图像 | |
| Mat edges; | |
| double position = 0.0; | |
| //设置播放哪一帧，这里设置为第0帧 | |
| capture.set(CV_CAP_PROP_POS_FRAMES, position); | |
| while (1) | |
| { | |
| if (!capture.read(frame)) | |
| break; | |
| //将原图像转换为灰度图像 | |
| cvtColor(frame, edges, COLOR_BGR2GRAY); | |
| //capture >> frame; //读取当前帧 | |
| //使用3 x3 内核来降噪( 2 x 3 + 1 = 7) | |
| blur(edges, edges, Size(7, 7)); | |
| //进行canny 边缘检测并显示 | |
| Canny(edges, edges, 0, 33 , 3); | |
| imshow("Movie Player", frame); | |
| //imshow("Movie Player", edges); | |
| char c = waitKey(33); | |
| if (c == 27) | |
| break; | |
| //waitKey(30); | |
| } | |
| capture.release(); | |
| destroyWindow("Movie Player"); | |
| return 0; | |
| } |
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