opencv 视频转图像，图像转视频

来源：互联网发布：企业淘宝店铺初始运营编辑：程序博客网时间：2024/06/10 14:10

由于经常需要用到图像序列进行图像处理，视频转图像，图像转视频方法保存备用

1. 确定所使用的视频格式opencv是否支持，网上有诸多软件可以进行转码。

2.上代码处理

#include <iostream>#include <vector>#include "opencv2\highgui\highgui.hpp"using namespace std;using namespace cv;void video2image(string video,string path){VideoCapture capture(video);if(!capture.isOpened()){cerr<<"Failed to open a video"<<endl;return ;}Mat frame;int num=1;string filename;char   temp_file[5];for(;;){capture>>frame;if(frame.empty())break;_itoa_s(num,temp_file,4,10); //4表示字符长度  10表示十进制  实现整型转字符串filename = temp_file;filename = path+filename+".jpg";  num++;imwrite(filename,frame);}capture.release();}//假定图像集已经按帧号顺序排列void images2video(string _Imagespath,string &_videoTosave){int numframes = 120; //需要合成视频的帧数int fourcc    = CV_FOURCC('D','I','V','X'); //编解码类型double fps    = 30;bool iscolor  = true;int frameWidth = 160; //帧宽度int frameHeight= 120; //帧高度VideoWriter Writer;Writer = VideoWriter(_videoTosave,fourcc,fps,Size(frameWidth,frameHeight),iscolor);string filename;char   temp_file[5];Mat frame;for (int i=1;i<=numframes;i++){_itoa_s(i,temp_file,4,10); //4表示字符长度  10表示十进制  实现整型转字符串filename = temp_file;filename = _Imagespath+filename+".jpg";frame    = imread(filename);if (frame.empty()){cout<<"could not load image"<<endl;exit(0);}Writer.write(frame);}}int main(int argc,char** argv){string videoFromfile = "E:\\opencv_demo\\vs2010\\video\\006_1.avi";  //读取视频string Imagespath    = "E:\\opencv_demo\\vs2010\\video\\Image\\";    //保存图片集路径string videoTosave   = "E:\\opencv_demo\\vs2010\\video\\testVideo.avi"; //保存视频路径video2image(videoFromfile,Imagespath);images2video(Imagespath,videoTosave);return 0;}