使用opencv简单的播放AVI程序(40行)

最新推荐文章于 2021-03-24 11:02:50 发布

fdl19881

最新推荐文章于 2021-03-24 11:02:50 发布

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分类专栏： opencv 文章标签： avi null c

本文链接：https://blog.youkuaiyun.com/fdl19881/article/details/6689496

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学习OPENCV的第一个例子

#include <highgui.h>
#include <cassert>
#include <iostream>
#include <Windows.h>
using namespace std;
void OnTrackbarSlide(int pos);

int g_slider_position = 0;
CvCapture *g_capture = NULL;
int main(int argc , char ** argv)
{
	assert(argc == 2);
	cvNamedWindow("Example2",CV_WINDOW_AUTOSIZE);
	g_capture = cvCreateFileCapture(argv[1]);
	assert(g_capture != NULL);
	int frames = (int) cvGetCaptureProperty(g_capture,CV_CAP_PROP_FRAME_COUNT);
	int fps = (int) cvGetCaptureProperty(g_capture,CV_CAP_PROP_FPS);
	const int step_time = 1000 / fps ;
	if(frames != 0){
		cvCreateTrackbar("Position","Example2",&g_slider_position,frames,OnTrackbarSlide);
	}
	IplImage *frame ;
	while(1){
		frame = cvQueryFrame(g_capture);
		if(frame == NULL)
			break;
		cvShowImage("Example2",frame);
		if(++g_slider_position % fps == 0)
			cvSetTrackbarPos("Position","Example2",++g_slider_position);
		char c = cvWaitKey(step_time);
		if(c == 27)
			break;
	}
	cvReleaseCapture(&g_capture);
	cvDestroyWindow("Example2");

}

void OnTrackbarSlide(int pos)
{
	cvSetCaptureProperty(g_capture,CV_CAP_PROP_POS_FRAMES,
		pos);
}

OnTrackbarSlide(int pos)为滑块的回调函数.

别的函数可以忘文生义

运行之前请安装好opencv库,再在依赖库中设置好比如我用的opencv 2.1

cvcore210d.lib cv210d.lib highgui210d.lib