opencv图片转换为avi格式视频

#include 
#include 
#include 

std::string AddPathSeparator(const std::string &path)
{
	std::string ret = path;
	if (!ret.empty() && ret[ret.length()-1]!='\\') {
		ret += "\\";
	}
	return ret;
}

void FindInAll(const std::string& srcDir, std::vector &ret, const std::string& filter="") 
{
	std::string dir = AddPathSeparator(srcDir);
	dir += "*.*";
   
	WIN32_FIND_DATAA wfd;
	HANDLE hFind = FindFirstFileA(dir.c_str(), &wfd);
	if (hFind == INVALID_HANDLE_VALUE) {
		return;
	}

	do {
		if (wfd.cFileName[0] == '.') {
			continue; // 过滤当前目录和上级目录
		}
		
		std::string childDir = AddPathSeparator(srcDir) + wfd.cFileName;
		if (wfd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) {
			FindInAll(childDir, ret, filter);
		} else {
			if (filter.empty() || childDir.substr(childDir.length()-filter.length())==filter) {
				ret.push_back(childDir);
			}
		}
	} while (FindNextFileA(hFind, &wfd));
	FindClose(hFind);
}

bool image2video(const std::string &bmpDir, const std::string &aviPath)
{
	if (bmpDir.empty() || aviPath.empty()) {
		return false;
	}

	cv::VideoWriter aviWriter;
	std::vector images;
	FindInAll(bmpDir, images, "jpg");
	for (std::vector::iterator iter=images.begin(),
		end=images.end(); iter!=end; ++iter) {
			cv::Mat frame = cv::imread(*iter);
			int frameRate = 1;
			if (!aviWriter.isOpened()) {
				cv::Size frameSize;
				frameSize.width = frame.cols;
				frameSize.height = frame.rows;
				if (!aviWriter.open(aviPath, CV_FOURCC('M', 'J', 'P', 'G'),
					frameRate, frameSize, true)) {
						std::cout << "VideoWriter open failed!" << std::endl;
						return false;
				}
			}
			aviWriter.write(frame);
			cv::waitKey(frameRate);
	}
	return true;
}

int main(int argc, char *argv[])
{
	if (image2video("G:\\test", "G:\\test\\test.avi")) {
		std::cout << "success" << std::endl;
	} else {
		std::cout << "failed" << std::endl;
	}
}