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批量解帧视频文件cpp

伢赞 2022-07-13 阅读 62

前言

  将多个视频文件进行解帧。

实现过程

1.批量获取文件路径;

2.对某个视频文件进行解帧;

代码

/************************************************************************
* Copyright(c) 2017 ZRJ
* All rights reserved.
*
* File: video2frames.cpp
* Brief: 批量解帧视频文件
* Version: 1.0
* Author: ZRJ
* Email: happyamyhope@163.com
* Date: 2017/05/10
* History:
* 20170510: 批量解帧视频文件;


************************************************************************/
//-------------------------------------------------------------------------
//头文件
#include<highgui.h>
#include<cv.h>
#include<io.h>
#include<iostream>
#include<fstream>
#include <direct.h>//mkdir
using namespace std;
using namespace cv;
//调参
string filePath = "E:\\carriage_recognition\\video\\2017-05-02";
char picfilename[64];
char save_path[64];
//函数声明
void getFiles(string path, vector<string>& files)
{
//文件句柄
long hFile = 0;
//文件信息
struct _finddata_t fileinfo;
string p;
if ((hFile = (long)_findfirst(p.assign(path).append("\\*").c_str(), &fileinfo)) != -1)
{
do
{
//如果是目录,迭代之
//如果不是,加入列表
if ((fileinfo.attrib & _A_SUBDIR))
{
if (strcmp(fileinfo.name, ".") != 0 && strcmp(fileinfo.name, "..") != 0)
getFiles(p.assign(path).append("\\").append(fileinfo.name), files);
}
else
{
files.push_back(p.assign(path).append("\\").append(fileinfo.name));
}
} while (_findnext(hFile, &fileinfo) == 0);
_findclose(hFile);
}
}
void mpf2frame(const char* videoPath, char* picfilename)
{
CvCapture* capture = cvCaptureFromFile(videoPath);
int fps = (int)cvGetCaptureProperty(capture, CV_CAP_PROP_FPS);
long nFrame = (long)cvGetCaptureProperty(capture, CV_CAP_PROP_FRAME_COUNT); // 获取总帧数
int width = (int)cvGetCaptureProperty(capture, CV_CAP_PROP_FRAME_WIDTH);
int height = (int)cvGetCaptureProperty(capture, CV_CAP_PROP_FRAME_HEIGHT);
IplImage* image = NULL;
int i = 0;

if (capture)
{
while (1)
{
image = cvQueryFrame(capture);
if (image)
{
i++;
if (i % 5000 == 0 && i <= nFrame )
{
sprintf(save_path, "%s\\%d.jpg", picfilename, i);
cvSaveImage(save_path, image);
}
else if (i < nFrame)
{

}
else if (i >= nFrame)
{
return;
}
}
}
}


}
int main()
{

ofstream fout("video_list.txt");
vector<string> files;
//获取该路径下的所有文件
getFiles(filePath, files);
int size = (int)files.size();
for (int i = 0; i < size; i++)
{
fout << files[i].c_str() << endl;
cout << i << endl;
const char* filename = files[i].c_str();
sprintf(picfilename, "%s\\frame", filePath.c_str());
_mkdir(picfilename);
sprintf(picfilename, "%s\\%d", picfilename, i);
_mkdir(picfilename);
mpf2frame(filename, picfilename);

}
fout.close();
return 0;

}

View Code

 

代码说明:

1.每个视频文件的解帧文件夹在视频文件路径下,按序排列;

2.字符串的操作不熟练;

3.批量获取文件参考博客

 

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