1 #include "stdafx.h"
2 #include "highgui.h"
3 int g_slider_position = 0;
4 CvCapture* g_capture = NULL;
5 void onTrackbarSlide(int pos)
6 {
7 cvSetCaptureProperty(g_capture, CV_CAP_PROP_POS_FRAMES,pos);
8 }
9
10 int main()
11 {
12 cvNamedWindow("Test Vedio Slide",CV_WINDOW_AUTOSIZE);
13 g_capture = cvCreateFileCapture("test.avi");
14 int frames = (int)cvGetCaptureProperty(g_capture,CV_CAP_PROP_FRAME_COUNT);
15 int frameRate = (int)cvGetCaptureProperty(g_capture,CV_CAP_PROP_FPS);
16
17 if(frames!=0)
18 {
19 cvCreateTrackbar("position","Test Vedio Slide", &g_slider_position, frames, onTrackbarSlide);
20 }
21 IplImage* frame;
22 for(g_slider_position = 0;g_slider_position<frames;g_slider_position++)
23 {
24 frame = cvQueryFrame(g_capture);
25 if(!frame)
26 break;
27 cvShowImage("Test Vedio Slide", frame);
28 char c = cvWaitKey(frameRate);
29 cvSetTrackbarPos("position","Test Vedio Slide", g_slider_position);
30 onTrackbarSlide(g_slider_position);
31 if(c == 27)
32 break;
33 }
34 cvReleaseCapture(&g_capture);
35 cvDestroyWindow("Test Vedio Slide");
36 }
