为播放器加控制条（控制条自动移动）

来源：互联网发布：如何分析眼镜的数据编辑：程序博客网时间：2024/04/28 04:39

#include "cv.h"#include "highgui.h"CvCapture* g_capture;int g_position;void onTrackbarSlide(int pos){ cvSetCaptureProperty(g_capture,CV_CAP_PROP_POS_FRAMES,pos);}int main(int argc, char** argv){ g_capture = cvCaptureFromFile("F://VC数字图像处理光盘//光盘文件//各章测试图//第九章//multitarget.avi"); cvNamedWindow("window",CV_WINDOW_AUTOSIZE); int frames=(int)cvGetCaptureProperty(g_capture,CV_CAP_PROP_FRAME_COUNT); if(frames!=0){ cvCreateTrackbar("track","window",&g_position,frames,onTrackbarSlide); } IplImage* frame; while(TRUE){ frame=cvQueryFrame(g_capture); if(!frame){break;} cvShowImage("window",frame); char c = cvWaitKey(100); int currentFrame = (int)cvGetCaptureProperty(g_capture,CV_CAP_PROP_POS_FRAMES); cvSetTrackbarPos("track","window",currentFrame); if(c==27){ break; } } cvReleaseImage(&frame); cvReleaseCapture(&g_capture); cvDestroyWindow("window"); return 0;}

create两种：

create后返回

create参数表中有create对象的名称