opencv 将视频分解成图片和使用本地图片合成视频

代码如下:

// cvTest.cpp : Defines the entry point for the console application.


#include "stdafx.h"
#include<iostream>
#include<opencv2/core/core.hpp>
#include<opencv2/highgui/highgui.hpp>
using namespace cv;
using namespace std;

char outname[200];

typedef struct __SaveProp__
{
	int width;
	int height;
	int framerate;

	struct __SaveProp__(int W, int H, int F)
	{
		width = W;
		height = H;
		framerate = F;
	}

}SaveProp;


void Video2Img(char* filename, char* outpath, int index, char* postfix);
void Img2Video(char* filepath, unsigned int startIndex, unsigned int EndIndex, char* fOutname, SaveProp* p_prop);

int _tmain(int argc, _TCHAR* argv[])
{
	//Video2Img("E:\3.avi", "E:\data", 500, "bmp");

	SaveProp saveprop(640, 482,15);

	Img2Video("E:\data", 1, 481, "E:\test", &saveprop);
	return 0;
}

//视频拆分成图片
void Video2Img(char* filename, char* outpath, int index, char* postfix)
{
	VideoCapture cap(filename);
	if (!cap.isOpened())
	{
		cout << "============================= Video Open Error ============================= " << endl;
		return;
	}
	
	Mat frame;
	int totalname = cap.get(CV_CAP_PROP_FRAME_COUNT);

	for (int i = 1; i <= totalname; i++)
	{
		cap >> frame;
		if (frame.empty())
			break;
		
                cout << "============================= write " << i << " frame  =============================" << endl;
		sprintf(outname, "%s\%04d.%s", outpath, index, postfix);
		index++;

		imshow("video", frame);
		waitKey(10);

		imwrite(outname, frame);
	}
	cap.release();
	destroyAllWindows();

	cout << "============================= Finish Converting =============================" << endl;
}

// 编码方法
/*
CV_FOURCC('P','I','M','1') = MPEG-1 codec
CV_FOURCC('M','J','P','G') = motion-jpeg codec
CV_FOURCC('M', 'P', '4', '2') = MPEG-4.2 codec
CV_FOURCC('D', 'I', 'V', '3') = MPEG-4.3 codec
CV_FOURCC('D', 'I', 'V', 'X') = MPEG-4 codec
CV_FOURCC('U', '2', '6', '3') = H263 codec
CV_FOURCC('I', '2', '6', '3') = H263I codec
CV_FOURCC('F', 'L', 'V', '1') = FLV1 codec
*/
// 图片合成视频
void Img2Video(char* filepath, unsigned int startIndex, unsigned int EndIndex, char* fOutname, SaveProp* p_prop)
{
	sprintf(outname, "%s.avi", fOutname);

	VideoWriter writer(outname, VideoWriter::fourcc('M', 'P', '4', '2'), p_prop->framerate,
		Size(p_prop->width, p_prop->height));

	Mat frame;
	char filename[200];

	for (unsigned int i = startIndex; i <= EndIndex; i++)
	{
		sprintf(filename, "%s\%04d.bmp", filepath, i);
		frame = imread(filename);
		if (!frame.empty())
		{
			writer.write(frame);
			cout << "============================= write " << i <<" frame  =============================" << endl;
		}
			
		else
			cout << "============================= Image Open Error ============================= " << endl;

	}

	cout << "============================= Finish Converting =============================" << endl;
}