opencv图片转幻灯片视频

 1 /*g++ *.cpp `pkg-config --cflags --libs opencv` -std=c++11*/
 2
 3 #include <opencv2/opencv.hpp>
 4 using namespace std;
 5 using namespace cv;
 6 #define NUM_FRAME 300
 7 #define SIZE 7
 8
 9 char path[100];//输入文件路径
10
11 //将图片序列转换为视频
12 void getVideo()
13 {
14     int i = 0;
15     IplImage* img = 0;//读入图像
16     IplImage* outimg = 0;//修改图像尺寸
17     char image_name[100];//图像名字
18     char videoname[100];
19     strcpy(videoname, path);
20     strcat(videoname, "//1.avi");
21
22     //初始化视频编写器，参数根据实际视频文件修改
23     CvVideoWriter *writer = 0;
24     //从文件读入视频
25     CvCapture* capture = cvCaptureFromAVI(videoname);
26     //读取和显示
27     int isColor = 1;
28     IplImage* frameimg;//从视频中提取的帧图像
29     int fps = (int)cvGetCaptureProperty(capture, CV_CAP_PROP_FPS);//视频的fps
30     int frameH = (int)cvGetCaptureProperty(capture, CV_CAP_PROP_FRAME_HEIGHT);//视频的高度
31     int frameW = (int)cvGetCaptureProperty(capture, CV_CAP_PROP_FRAME_WIDTH);//视频的宽度
32     writer = cvCreateVideoWriter("..//output//2.avi",-1, fps, cvSize(frameW, frameH), isColor);//创建视频写入
33     printf("\tvideo height : %d\n\tvideo width : %d\n\tfps : %d\n", frameH, frameW, fps);
34     //创建窗口
35     cvNamedWindow("mainWin", CV_WINDOW_AUTOSIZE);
36     //读入图片，并制作幻灯片
37     while (i<SIZE)
38     {
39         CvSize Out_Img_size;//图片的大小
40         Out_Img_size.width = frameW;//使读入图片的大小与视频尺寸相同
41         Out_Img_size.height = frameH;
42         sprintf(image_name, "%d%s", ++i, ".jpg");//得到图片名字
43         char imgname[100];
44         strcpy(imgname, path);
45         strcat(imgname, "//");
46         strcat(imgname,image_name);//加上路径
47         img = cvLoadImage(imgname);//打开图片
48         outimg = cvCreateImage(Out_Img_size, img->depth, img->nChannels);//创建一张与视频帧大小相同的图像
49         cvResize(img, outimg, CV_INTER_LINEAR);//让打开的图像重写为指定大小
50         if (!img)
51         {
52             printf("Could not load image file...\n");
53             exit(0);
54         }
55         //设置字体
56         CvFont font;
57         cvInitFont(&font, CV_FONT_VECTOR0, 0.5f, 0.5f, 0, 1, 8);
58         //在图像中显示文本字符串
59         cvPutText(outimg, "StudentID", cvPoint(frameW - 100, frameH - 60), &font, CV_RGB(255, 255, 255));
60         cvPutText(outimg, "name", cvPoint(frameW - 100, frameH - 30), &font, CV_RGB(255, 255, 255));
61         char key = cvWaitKey(20);//等待
62         //将图像写入视频，重复25次是为了使之放映速度变慢
63         for (int j = 0; j < 25; j++) {
64             cvShowImage("mainWin", outimg);
65             cvWriteFrame(writer, outimg);
66         }
67     }
68     i = 0;
69     while (1)
70     {
71         frameimg = cvQueryFrame(capture); //获取一帧图片
72         if (!frameimg)break;//读到尽头，退出
73         //设置字体
74         CvFont font;
75         cvInitFont(&font, CV_FONT_VECTOR0, 0.5f,0.5f , 0, 1, 8);
76         //在图像中显示文本字符串
77         cvPutText(frameimg, "StudentID", cvPoint(frameW - 100, frameH - 60), &font, CV_RGB(255, 255, 255));
78         cvPutText(frameimg, "name", cvPoint(frameW - 100, frameH - 30), &font, CV_RGB(255, 255, 255));
79         cvShowImage("mainWin", frameimg);
80         char key = cvWaitKey(20);
81         //将视频帧写入视频
82         cvWriteFrame(writer, frameimg);
83     }
84     cvReleaseVideoWriter(&writer);
85     cvDestroyWindow("mainWin");
86 }
87
88 int main(int argc, char** argv)
89 {
90     strcpy(path, argv[1]);
91     getVideo();
92     waitKey();
93     system("pause");
94     return 0;
95 }

原文地址：https://www.cnblogs.com/dirge/p/8413279.html