1、方法1

CFileDialog dlg(TRUE, _T("*.mp4"), NULL,OFN_FILEMUSTEXIST|OFN_PATHMUSTEXIST|OFN_HIDEREADONLY,_T("video files (*.avi) |*.avi|All Files (*.*)|*.*||"),NULL);

CString path ;

dlg.m_ofn.lpstrTitle= _T("OpenVedio");

if (dlg.DoModal() == IDOK) {

path = dlg.GetPathName();

}else

return;

IplImage* m_pFrame = NULL; // Declare IPL/OpenCV image pointer

HRESULT hr;

// 定义IMediaDet接口实例

CComPtr< IMediaDet > pDet;

hr = pDet.CoCreateInstance(__uuidof(MediaDet));

if (FAILED(hr))

return;

// 将影片文件名转换成BSTR类型

CComBSTR openBSTR(path);

// 设置IMediaDet接口的文件关联

hr = pDet->put_Filename(openBSTR);

if (FAILED(hr))

return ;

// 从影片中检索视频流和音频流

long lStreams;

hr = pDet->get_OutputStreams(&lStreams);

if (FAILED(hr))

return ;

// 取出影片的视频流，因为帧的信息是保存在视频流中的

bool bFound = false;

for (int i=0; i

{

GUID major_type;

hr = pDet->put_CurrentStream(i);

if (SUCCEEDED(hr))

hr = pDet->get_StreamType(&major_type);

if (FAILED(hr))

break;

if (major_type == MEDIATYPE_Video)

{

bFound = true;

break;

}

}

if (!bFound)

return ;

long width = 0, height = 0; // 存储位图的宽和高(单位：象素)

AM_MEDIA_TYPE mt;

hr = pDet->get_StreamMediaType(&mt);

if (SUCCEEDED(hr))

{

if ((mt.formattype == FORMAT_VideoInfo) && (mt.cbFormat >= sizeof(VIDEOINFOHEADER)))

{

// 得到VIDEOINFOHEADER结构指针，VIDEOINFOHEADER结构包含一些与视频

// 有关的信息，其中含有BITMAPINFORHEADER结构

VIDEOINFOHEADER *pVih = (VIDEOINFOHEADER*)(mt.pbFormat);

width = pVih->bmiHeader.biWidth;

height = pVih->bmiHeader.biHeight;

if(height < 0 ) height *= -1;

}

else

hr = VFW_E_INVALIDMEDIATYPE;

if(mt.cbFormat != 0)

{

CoTaskMemFree((PVOID)mt.pbFormat);

mt.cbFormat = 0;

}

if (mt.pUnk != NULL)

{

mt.pUnk->Release();

mt.pUnk = NULL;

}

}

if (FAILED(hr))

return ;

long size;

double time = 0.0;

double totaltime;

double rate ;

// 获取整个视频的时间长度

pDet->get_StreamLength(&totaltime);

//每秒多少帧

pDet->get_FrameRate(&rate);

cvNamedWindow( "result", 1 );

//totaltime = totaltime*rate;

m_pFrame = cvCreateImage(cvSize(width, height), IPL_DEPTH_8U, 3);

//每秒读一帧

for(time=0.0; time

{

/*

hr = pDet->EnterBitmapGrabMode(time);

if(FAILED(hr))

{

printf( "Failed in EnterBitmapGrabMode! hr=0x%x\r\n", hr );

return ;

}

CComPtr < ISampleGrabber > pGrabber = NULL;

hr = pDet->GetSampleGrabber(&pGrabber);

pGrabber->GetCurrentBuffer(&size, NULL);

long m_nBufferSize = size;

pGrabber->GetCurrentBuffer(&m_nBufferSize, (long*)m_pFrame->imageData);

*/

///*

hr = pDet->GetBitmapBits(time, &size, 0, width, height);

if (FAILED(hr))

return ;

char *pBuffer = new char[size];

if (!pBuffer)

return ;

hr = pDet->GetBitmapBits(time, 0, pBuffer, width, height);

if (FAILED(hr))

return ;

m_pFrame->imageData = pBuffer + sizeof(BITMAPINFOHEADER);

//*/

cvFlip(m_pFrame);

//detect_and_draw(m_pFrame);

cvShowImage( "result", m_pFrame );

cvWaitKey( 10 );

delete[] pBuffer;

//AfxMessageBox("t");

}

cvReleaseImage(&m_pFrame);

cvDestroyWindow("result");

2 方法：

#include "stdafx.h"

#include "cv.h"

#include "highgui.h"

#include "ffopencv.h"

int main(int argc, char* argv[])

{

IplImage *frame=NULL;

CvCapture* capture;

capture=cvCaptureFromFile_FFMPEG("lake.mpg");//D:\\Downloads\\Guns and roses\\Guns N'Roses-Welcome To The Jungle.mpg");

//   capture=cvCreateFileCapture("lake.mpg");

//   CvSize imgSize;

cvNamedWindow("videoS",CV_WINDOW_AUTOSIZE);

//   cvResizeWindow("video1",110,1000);

cvMoveWindow( "videoS", 10, 50 );  //原始图像窗口定位

frame=cvQueryFrame(capture);

int numTotal=100000;

for(int num=1;num

{

frame=cvQueryFrame(capture);

cvShowImage("videoS", frame);

cvWaitKey(100);

}

return 0;

}