參考博文：http://blog.sina.com.cn/s/blog_60b330b801018s0u.html
運行環境：Win7 OpenCV1.0 VC6.0，下面生成視頻的代碼用到的是XVID編碼器，如果電腦上沒有需要下載，否則生成的視頻文件大小為0。或者將cvCreateVideoWriter("out.avi",CV_FOURCC('X','V','I','D'),fps,cvSize(frameW,frameH),isColor)的'X','V','I','D'修改為電腦上已有的編碼器即可。
注：是將多張圖像合並成視頻的，所以最後生成的視頻是沒有聲音的。
1 // 該程序實現視頻和圖片的相互轉換.
2 // Image_to_video()函數將一組圖片合成AVI視頻文件.
3 // Video_to_image()函數將AVI視頻文件讀入，將每一幀存儲為jpg文件.
4 //
5 ////////////////////////////////////////////////////////////////////////
6 #include <stdlib.h>
7 #include <stdio.h>
8 #include <math.h>
9 #include <cv.h>
10 #include <highgui.h>
11 #define NUM_FRAME 300 //只處理前300幀，根據視頻幀數可修改
12
13 void Video_to_image(char* filename)
14 {
15 printf("------------- video to image ... ----------------\n");
16 //初始化一個視頻文件捕捉器
17 CvCapture* capture = cvCaptureFromAVI(filename);
18 //獲取視頻信息
19 cvQueryFrame(capture);
20 int frameH = (int) cvGetCaptureProperty(capture, CV_CAP_PROP_FRAME_HEIGHT);
21 int frameW = (int) cvGetCaptureProperty(capture, CV_CAP_PROP_FRAME_WIDTH);
22 int fps = (int) cvGetCaptureProperty(capture, CV_CAP_PROP_FPS);
23 int numFrames = (int) cvGetCaptureProperty(capture, CV_CAP_PROP_FRAME_COUNT);
24 printf("\tvideo height : %d\n\tvideo width : %d\n\tfps : %d\n\tframe numbers : %d\n", frameH, frameW, fps, numFrames);
25 //定義和初始化變量
26 int i = 0;
27 IplImage* img = 0;
28 char image_name[13];
29
30 cvNamedWindow( "mainWin", CV_WINDOW_AUTOSIZE );
31 //讀取和顯示
32 while(1)
33 {
34
35 img = cvQueryFrame(capture); //獲取一幀圖片
36 cvShowImage( "mainWin", img ); //將其顯示
37 char key = cvWaitKey(20);
38
39 sprintf(image_name, "%s%d%s", "image", ++i, ".jpg");//保存的圖片名
40
41 cvSaveImage( image_name, img); //保存一幀圖片
42
43 if(i == NUM_FRAME) break;
44 }
45 cvReleaseCapture(&capture);
46 cvDestroyWindow("mainWin");
47 }
48 void Image_to_video()
49 {
50 int i = 0;
51 IplImage* img = 0;
52 char image_name[13];
53 printf("------------- image to video ... ----------------\n");
54 //初始化視頻編寫器，參數根據實際視頻文件修改
55 CvVideoWriter *writer = 0;
56 int isColor = 1;
57 int fps = 30; // or 25
58 int frameW = 400; // 744 for firewire cameras
59 int frameH = 240; // 480 for firewire cameras
60 writer=cvCreateVideoWriter("out.avi",CV_FOURCC('X','V','I','D'),fps,cvSize(frameW,frameH),isColor);
61 printf("\tvideo height : %d\n\tvideo width : %d\n\tfps : %d\n", frameH, frameW, fps);
62 //創建窗口
63 cvNamedWindow( "mainWin", CV_WINDOW_AUTOSIZE );
64 while(i<NUM_FRAME)
65 {
66 sprintf(image_name, "%s%d%s", "image", ++i, ".jpg");
67 img = cvLoadImage(image_name);
68 if(!img)
69 {
70 printf("Could not load image file...\n");
71 exit(0);
72 }
73 cvShowImage("mainWin", img);
74 char key = cvWaitKey(20);
75 cvWriteFrame(writer, img);
76 }
77 cvReleaseVideoWriter(&writer);
78 cvDestroyWindow("mainWin");
79 }
80
81 int main(int argc, char *argv[])
82 {
83 char filename[13] = "infile.avi";
84 Video_to_image(filename); //視頻轉圖片
85 Image_to_video(); //圖片轉視頻
86 return 0;
87 }
88 //--------------------------------------------------------------------------------
