Opencv reads MP4, MPEG, WMV, FLV, mov, 3GP etc. on Win32

Source: http://wsyjwps1983.blog.163.com/blog/static/6800900120123181500785/
Fily logs-Netease blog

13:50:00 | classification: image and video codec | font size subscription

14:41:56 | classification: Pattern Recognition | Tag:

1. method 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;
// Define the imediadet interface instance
Ccomptr <imediadet> pdet;

HR = pdet. cocreateinstance (_ uuidof (mediadet ));
If (failed (HR ))
Return;

// Convert the video file name to the BSTR type
Ccombstr openbstr (PATH );
// Set the file association for the imediadet Interface
HR = pdet-> put_filename (openbstr );
If (failed (HR ))
Return;

// Retrieve video streams and audio streams from a video
Long lstreams;
HR = pdet-> get_outputstreams (& lstreams );
If (failed (HR ))
Return;

// Extract the video stream of the video because the frame information is stored in the video stream.
Bool bfound = false;
For (INT I = 0; I <lstreams; 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; // store the width and height of the bitmap (unit: pixels)
Am_media_type MT;
HR = pdet-> get_streammediatype (& mt );
If (succeeded (HR ))
{
If (mt. formattype = format_videoinfo) & (mt. cbformat> = sizeof (videoinfoheader )))
{
// Get the videoinfoheader structure pointer. The videoinfoheader structure includes some
// Related information, which contains the bitmapinforheader Structure
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;

// Obtain the length of the video.
Pdet-> get_streamlength (& totaltime );
// The number of frames per second
Pdet-> get_framerate (& rate );

Cvnamedwindow ("result", 1 );

// Totaltime = totaltime * rate;
M_pframe = cvcreateimage (cvsize (width, height), ipl_depth_8u, 3 );
// Read one frame per second
For (time = 0.0; time <totaltime; Time + = 1.0)
{
/*
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 method: # 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); // locate the original image window

Frame = cvqueryframe (capture );
Int numtotal = 100000;
For (INT num = 1; num <numtotal; num ++)
{

Frame = cvqueryframe (capture );
Cvshowimage ("videos", frame );
Cvwaitkey (1, 100 );
}

Return 0;
}