使用OpenCV进行视频读写



OpenCV视频读写的代码，用的是其C++形式的API。输入文件为完全无压缩的avi格式视频文件。

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1. #include <opencv/cxcore.h>  
2. #include <opencv/highgui.h>  
3. #include <opencv/cv.h>  
4.   
5. #undef RC_OPENCV_2_1_0  
6.   
7. #ifdef _DEBUG  
8. #ifdef RC_OPENCV_2_1_0  
9. #pragma comment( lib, "cxcore210d.lib" )  
10. #pragma comment( lib, "cv210d.lib" )  
11. #pragma comment( lib, "highgui210d.lib" )         
12. #else  
13. #pragma comment( lib, "opencv_core220d.lib" )  
14. #pragma comment( lib, "opencv_highgui220d.lib" )  
15. #pragma comment( lib, "opencv_imgproc220d.lib" )  
16. #endif  
17. #else  
18. #ifdef RC_OPENCV_2_1_0  
19. #pragma comment( lib, "cxcore210.lib" )  
20. #pragma comment( lib, "cv210.lib" )  
21. #pragma comment( lib, "highgui210.lib" )  
22. #else  
23. #pragma comment( lib, "opencv_core220.lib" )  
24. #pragma comment( lib, "opencv_highgui220.lib" )  
25. #pragma comment( lib, "opencv_imgproc220.lib" )  
26. #endif  
27. #endif  
28.   
29. void main()  
30. {  
31.     /** 打开输入视频文件 */  
32.     cv::VideoCapture vc;  
33.     vc.open( ".//test.avi" );  
34.       
35.     if ( vc.isOpened() )  
36.     {  
37.         /** 打开输出视频文件 */  
38.         cv::VideoWriter vw;  
39.         vw.open( ".//output.avi", // 输出视频文件名  
40.                 (int)vc.get( CV_CAP_PROP_FOURCC ), // 也可设为CV_FOURCC_PROMPT，在运行时选取  
41.                 (double)vc.get( CV_CAP_PROP_FPS ), // 视频帧率  
42.                 cv::Size( (int)vc.get( CV_CAP_PROP_FRAME_WIDTH ), (int)vc.get( CV_CAP_PROP_FRAME_HEIGHT ) ), // 视频大小  
43.                 true ); // 是否输出彩色视频  
44.   
45.         /** 如果成功打开输出视频文件 */  
46.         if ( vw.isOpened() )  
47.         {  
48.             while ( true )  
49.             {  
50.                 /** 读取当前视频帧 */  
51.                 cv::Mat frame;  
52.                 vc >> frame;  
53.   
54.                 /** 若视频读取完毕，跳出循环 */  
55.                 if ( frame.empty() )  
56.                 {  
57.                     break;  
58.                 }  
59.   
60.                 /** 将视频写入文件 */  
61.                 vw << frame;  
62.             }  
63.         }  
64.     }  
65.   
66.     /** 手动释放视频捕获资源 */  
67.     vc.release();  
68. }  

#include <opencv/cxcore.h>#include <opencv/highgui.h>#include <opencv/cv.h>#undef RC_OPENCV_2_1_0#ifdef _DEBUG#ifdef RC_OPENCV_2_1_0#pragma comment( lib, "cxcore210d.lib" )#pragma comment( lib, "cv210d.lib" )#pragma comment( lib, "highgui210d.lib" )#else#pragma comment( lib, "opencv_core220d.lib" )#pragma comment( lib, "opencv_highgui220d.lib" )#pragma comment( lib, "opencv_imgproc220d.lib" )#endif#else#ifdef RC_OPENCV_2_1_0#pragma comment( lib, "cxcore210.lib" )#pragma comment( lib, "cv210.lib" )#pragma comment( lib, "highgui210.lib" )#else#pragma comment( lib, "opencv_core220.lib" )#pragma comment( lib, "opencv_highgui220.lib" )#pragma comment( lib, "opencv_imgproc220.lib" )#endif#endifvoid main(){ /** 打开输入视频文件 */ cv::VideoCapture vc; vc.open( ".//test.avi" ); if ( vc.isOpened() ) { /** 打开输出视频文件 */ cv::VideoWriter vw; vw.open( ".//output.avi", // 输出视频文件名 (int)vc.get( CV_CAP_PROP_FOURCC ), // 也可设为CV_FOURCC_PROMPT，在运行时选取 (double)vc.get( CV_CAP_PROP_FPS ), // 视频帧率 cv::Size( (int)vc.get( CV_CAP_PROP_FRAME_WIDTH ), (int)vc.get( CV_CAP_PROP_FRAME_HEIGHT ) ), // 视频大小 true ); // 是否输出彩色视频 /** 如果成功打开输出视频文件 */ if ( vw.isOpened() ) { while ( true ) { /** 读取当前视频帧 */ cv::Mat frame; vc >> frame; /** 若视频读取完毕，跳出循环 */ if ( frame.empty() ) { break; } /** 将视频写入文件 */ vw << frame; } } } /** 手动释放视频捕获资源 */ vc.release();}

      运行结果