VideoCapture获取视频中的图像帧
int main(void) { VideoCapture capture("F:\\1.avi");//在嵌入式设备中这一句执行错误,挪到电脑上用VS没有错误, if (!capture.isOpened()) { printf("fail to open 1.avi\n"); }
//新版opencv中CV_CAP_PROP_FRAME_COUNT被改为CAP_PROP_FRAME_COUNT,记得修改,否则会编译错误 long totalFrameNumber = capture.get(CV_CAP_PROP_FRAME_COUNT); printf("total frame number is:%f\n", totalFrameNumber); long frameToStart = 1;
//新版opencv中CV_CAP_PROP_POS_FRAMES被改为CAP_PROP_POS_FRAMES,记得修改,否则会编译错误 capture.set(CV_CAP_PROP_POS_FRAMES, frameToStart); long frameToStop = 1000; //新版opencv中CV_CAP_PROP_FPS被改为CAP_PROP_FPS,记得修改,否则会编译错误 double rate = capture.get(CV_CAP_PROP_FPS); printf("rate is :%d\n", rate); bool stop = false; Mat frame; int delay = 1000 / rate; long currentFrame = frameToStart; char path[20] = {}; int imageNum = 0; while (!stop) { if (!capture.read(frame)) { printf("get frame fail!\n"); return -1; } sprintf(path, "F:\\%d.jpg", imageNum); imageNum++; //保存获取到的帧数据 imwrite(path, frame);
if (currentFrame > frameToStop) { stop = true; } currentFrame++; } capture.release(); return 0; }
作者:cumtchw
出处:http://www.cnblogs.com/cumtchw/
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