// 视频存为图片.cpp : 定义控制台应用程序的入口点。///*=========================================================================名称：视频保存为图片时间：2013.08说明：把读取视频保存为图片形式=========================================================================*/#include "stdafx.h"#include "cv.h"#include "highgui.h"#include "cxcore.h"char filename[100];//声明一个字符型数组，用来存放图片命名int _tmain(int argc, _TCHAR* argv[]){IplImage *frame;//声明一个图像指针，用来存放下一帧图像CvCapture *capture;//声明一个视频抽象接口capture = cvCreateFileCapture("E://3.avi");//加载本地视频cvNamedWindow("capture");//声明一个播放视频窗口int frames = (int)cvGetCaptureProperty( //capture,CV_CAP_PROP_FRAME_COUNT);//获取视频总帧数int i=0;while(1){frame = cvQueryFrame(capture);//获取视频下一帧if( !frame)//如果读取识别则停止break;sprintf(filename, "%s%d%s", "frame", i++, ".jpg");//保存的图片名cvSaveImage(filename, frame);cvShowImage("capture", frame);char c = cvWaitKey(33);if( c == 27)break;}return 0;}
此段代码来自http://lib.csdn.net/article/opencv/30225
相关的内容有http://blog.csdn.net/ss19890125/article/details/26257863
另外这个代码也可以http://blog.csdn.net/zhubenfulovepoem/article/details/9008387
#include <stdlib.h>#include <stdio.h>#include <math.h>#include <cv.h>#include <highgui.h>using namespace std;/*#include "stdafx.h"#include "cv.h"#include "highgui.h"#include "cxcore.h"char filename[100];//声明一个字符型数组，用来存放图片命名int _tmain(int argc, _TCHAR* argv[]){IplImage *frame;//声明一个图像指针，用来存放下一帧图像CvCapture *capture;//声明一个视频抽象接口capture = cvCreateFileCapture("E://3.avi");//加载本地视频cvNamedWindow("capture");//声明一个播放视频窗口int frames = (int)cvGetCaptureProperty( //capture,CV_CAP_PROP_FRAME_COUNT);//获取视频总帧数int i=0;while(1){frame = cvQueryFrame(capture);//获取视频下一帧if( !frame)//如果读取识别则停止break;sprintf(filename, "%s%d%s", "frame", i++, ".jpg");//保存的图片名cvSaveImage(filename, frame);cvShowImage("capture", frame);char c = cvWaitKey(33);if( c == 27)break;}return 0;}*/void Video_to_image(char* filename){printf("------------- video to image ... ----------------n");//初始化一个视频文件捕捉器CvCapture* capture = cvCaptureFromAVI(filename);//此时下一帧待取的视频帧序号为0int pos = (int)cvGetCaptureProperty(capture,CV_CAP_PROP_POS_FRAMES);//获取视频信息//cvQueryFrame(capture);把第0帧图像取了以后，下一帧待取的序号为1，所以下一行代码执行完毕pos就为1pos = (int)cvGetCaptureProperty(capture, CV_CAP_PROP_POS_FRAMES);//从文件中载入的视频高度，宽度，帧率，总帧数int frameH = (int)cvGetCaptureProperty(capture, CV_CAP_PROP_FRAME_HEIGHT);int frameW = (int)cvGetCaptureProperty(capture, CV_CAP_PROP_FRAME_WIDTH);int fps = (int)cvGetCaptureProperty(capture, CV_CAP_PROP_FPS);int numFrames = (int)cvGetCaptureProperty(capture, CV_CAP_PROP_FRAME_COUNT);printf("\nvideo height : %d\nvideo width : %d\nfps : %d\nframe numbers : %d", frameH, frameW, fps, numFrames);//定义和初始化变量int i = 0;char image_name[30];cvNamedWindow("mainWin",CV_WINDOW_AUTOSIZE);//读取和显示while (1){IplImage* img = 0;//一直没有取，所以pos还是为待取的视频帧序号1pos = (int)cvGetCaptureProperty(capture, CV_CAP_PROP_POS_FRAMES);//取了第一帧img = cvQueryFrame(capture); //获取一帧图片//pos为待取的帧序号，所以此行代码执行以后，pos的值变化为2pos = (int)cvGetCaptureProperty(capture, CV_CAP_PROP_POS_FRAMES);cvShowImage("mainWin", img); //将其显示char key = cvWaitKey(20);sprintf(image_name, "%s%d%s", "image", i++, ".jpg");//保存的图片名cvSaveImage(image_name, img); //保存一帧图片//if (i == 439){//cout << "我是439帧" << endl;//}if (i >= numFrames ) break;//440>440为假，再次进入循环}cvReleaseCapture(&capture);cvDestroyWindow("mainWin");}void Image_to_video(){int i = 0;IplImage * img = NULL;char image_name[30];printf("------------- image to video ... ----------------n");//初始化视频编写器，参数根据实际视频文件修改CvVideoWriter * writer = 0;int isColor = 1;int fps = 30; // or 25,帧率int frameW = 400; // 744 for firewire camerasint frameH = 240; // 480 for firewire cameraswriter = cvCreateVideoWriter("out.avi", CV_FOURCC('X', 'V', 'I', 'D'), fps, cvSize(frameW, frameH), isColor);printf("video height : %d\tvideo width : %d\tfps : %d\n", frameH, frameW, fps);//创建窗口cvNamedWindow("mainWin", CV_WINDOW_AUTOSIZE);while (i<440){sprintf(image_name, "%s%d%s", "image", ++i, ".jpg");img = cvLoadImage(image_name);if (!img){printf("Could not load image file...n");exit(0);}cvShowImage("mainWin", img);char key = cvWaitKey(20);cvWriteFrame(writer, img);}cvReleaseVideoWriter(&writer);cvDestroyWindow("mainWin");}int main(int argc, char *argv[]){char filename[20] = "highwayI_raw.avi";Video_to_image(filename); //视频转图片return 0;}
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