获取视频帧

前言

对已有的视频进行解帧，得到视频图像帧，便于之后的图像处理。

c++/opencv代码如下：  

#include<highgui.h>
#include<cv.h>
#include<iostream>
using namespace std;
using namespace cv;

int main()
{

    CvCapture* capture = cvCaptureFromFile(".\input_path\input_video.mp4");
    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;
    char save_path[100];
    int i = 0;
    int start = 1;
    int end = 1000;
    if (capture)
    {
        while (1)
        {
            image = cvQueryFrame(capture);
            if (image)
            {
                i++;
                cout << "i=" << i << endl;
                if (i >= start && i <= end)
                {
                    //cout << "save " << i << " th image..." << endl;
                    sprintf(save_path, ".\output_path\frames\%d.jpg", i);
                    cvSaveImage(save_path, image);
                }
                if (i > end)
                {
                    return 0;
                }
            }
        }
    }
}

注意：

c++代码中的路径必须是反双斜杠！！！ 

完