如何在MFC中的应用程序中播放视频。 [英] How to play the video within the application in MFC.

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问题描述

我尝试使用无窗口模式在应用程序中播放视频，但我无法获得输出。但是我在窗口模式下成功播放了视频。



请有人帮我这个。



这里是我的无窗口模式代码。



// PlaybackDlg.h：头文件

Im trying to play the video within the application using windowless mode but i couldn''t get the output. But i played the video successfully on windowed mode.

Kindly anyone help me for this.

Here is my windowless mode code.

// PlaybackDlg.h :Header file

#pragma comment(lib,"Strmiids.lib")
#pragma once

#include <dshow.h>
// CPlaybackDlg dialog
class CPlaybackDlg : public CDialog
{
// Construction
public:
	CPlaybackDlg(CWnd* pParent = NULL);	// standard constructor

// Dialog Data
	enum { IDD = IDD_PLAYBACK_DIALOG };

	protected:
	virtual void DoDataExchange(CDataExchange* pDX);	// DDX/DDV support


// Implementation
protected:
	HICON m_hIcon;

	// Generated message map functions
	virtual BOOL OnInitDialog();
	afx_msg void OnSysCommand(UINT nID, LPARAM lParam);
	afx_msg void OnPaint();
	afx_msg HCURSOR OnQueryDragIcon();
	DECLARE_MESSAGE_MAP()
public:
	afx_msg void OnBnClickedPlayBtn();
	IGraphBuilder *pGraph;
    IMediaControl *pControl;
    IMediaEvent   *pEvent;
	IVMRWindowlessControl *pWc;
	RECT rcSrc, rcDest;
	HWND hwnd;
	HRESULT InitWindowlessVMR( 
    HWND hwndApp,                  // Window to hold the video. 
    IGraphBuilder* pGraph,         // Pointer to the Filter Graph Manager. 
    IVMRWindowlessControl** ppWc   // Receives a pointer to the VMR.
    ) ;
	
};







// PlaybackDlg.cpp : implementation file
//

#include "stdafx.h"
#include "Playback.h"
#include "PlaybackDlg.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#endif


// CAboutDlg dialog used for App About

class CAboutDlg : public CDialog
{
public:
	CAboutDlg();

// Dialog Data
	enum { IDD = IDD_ABOUTBOX };

	protected:
	virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support

// Implementation
protected:
	DECLARE_MESSAGE_MAP()
};

CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD)
{
}

void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
}

BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
END_MESSAGE_MAP()


// CPlaybackDlg dialog




CPlaybackDlg::CPlaybackDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CPlaybackDlg::IDD, pParent)
{
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CPlaybackDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
}

BEGIN_MESSAGE_MAP(CPlaybackDlg, CDialog)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	//}}AFX_MSG_MAP
	ON_BN_CLICKED(IDC_PLAY_BTN, &CPlaybackDlg::OnBnClickedPlayBtn)
END_MESSAGE_MAP()


// CPlaybackDlg message handlers

BOOL CPlaybackDlg::OnInitDialog()
{
	CDialog::OnInitDialog();

	// Add "About..." menu item to system menu.

	// IDM_ABOUTBOX must be in the system command range.
	ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
	ASSERT(IDM_ABOUTBOX < 0xF000);

	CMenu* pSysMenu = GetSystemMenu(FALSE);
	if (pSysMenu != NULL)
	{
		CString strAboutMenu;
		strAboutMenu.LoadString(IDS_ABOUTBOX);
		if (!strAboutMenu.IsEmpty())
		{
			pSysMenu->AppendMenu(MF_SEPARATOR);
			pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
		}
	}

	// Set the icon for this dialog.  The framework does this automatically
	//  when the application's main window is not a dialog
	SetIcon(m_hIcon, TRUE);			// Set big icon
	SetIcon(m_hIcon, FALSE);		// Set small icon

	// TODO: Add extra initialization here

	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CPlaybackDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
	if ((nID & 0xFFF0) == IDM_ABOUTBOX)
	{
		CAboutDlg dlgAbout;
		dlgAbout.DoModal();
	}
	else
	{
		CDialog::OnSysCommand(nID, lParam);
	}
}

// If you add a minimize button to your dialog, you will need the code below
//  to draw the icon.  For MFC applications using the document/view model,
//  this is automatically done for you by the framework.

void CPlaybackDlg::OnPaint()
{
	if (IsIconic())
	{
		CPaintDC dc(this); // device context for painting
    RECT        rcClient; 
    GetClientRect(&rcClient); 
    if (pWc != NULL) 
    { 
        // Find the region where the application can paint by subtracting 
        // the video destination rectangle from the client area.
        // (Assume that g_rcDest was calculated previously.)
        HRGN rgnClient = CreateRectRgnIndirect(&rcClient); 
        HRGN rgnVideo  = CreateRectRgnIndirect(&rcDest);  
        CombineRgn(rgnClient, rgnClient, rgnVideo, RGN_DIFF);  
        
        // Paint on window.
        HBRUSH hbr = GetSysColorBrush(COLOR_BTNFACE); 
		FillRgn(dc.m_hDC, rgnClient, hbr); 

        // Clean up.
        DeleteObject(hbr); 
        DeleteObject(rgnClient); 
        DeleteObject(rgnVideo); 

        // Request the VMR to paint the video.
		HRESULT hr = pWc->RepaintVideo(hwnd, dc.m_hDC);  
    } 
    else  // There is no video, so paint the whole client area. 
    { 
		FillRect(dc.m_hDC, &rcClient, (HBRUSH)(COLOR_BTNFACE + 1)); 
    } 
//-----------------------------------------------------------------------------------------------------------//
		SendMessage(WM_ICONERASEBKGND, reinterpret_cast<WPARAM>(dc.GetSafeHdc()), 0);

		// Center icon in client rectangle
		int cxIcon = GetSystemMetrics(SM_CXICON);
		int cyIcon = GetSystemMetrics(SM_CYICON);
		CRect rect;
		GetClientRect(&rect);
		int x = (rect.Width() - cxIcon + 1) / 2;
		int y = (rect.Height() - cyIcon + 1) / 2;

		// Draw the icon
		dc.DrawIcon(x, y, m_hIcon);
	}
	else
	{
		CDialog::OnPaint();
	}
//-------------------------------------------------------------------------------------------------------//
}

// The system calls this function to obtain the cursor to display while the user drags
//  the minimized window.
HCURSOR CPlaybackDlg::OnQueryDragIcon()
{
	return static_cast<HCURSOR>(m_hIcon);
}


void CPlaybackDlg::OnBnClickedPlayBtn()
{
	// TODO: Add your control notification handler code here

HRESULT hr = CoInitialize(NULL);
    if (FAILED(hr))
    {
        MessageBox(L"ERROR - Could not initialize COM library");
        return;
    }

    // Create the filter graph manager and query for interfaces.
    hr = CoCreateInstance(CLSID_FilterGraph, NULL, CLSCTX_INPROC_SERVER, 
                        IID_IGraphBuilder, (void **)&pGraph);
    if (FAILED(hr))
    {
        MessageBox(L"ERROR - Could not create the Filter Graph Manager.");
        return;
    }

    hr = pGraph->QueryInterface(IID_IMediaControl, (void **)&pControl);
    hr = pGraph->QueryInterface(IID_IMediaEvent, (void **)&pEvent);
	hr = InitWindowlessVMR(hwnd, pGraph, &pWc);

	if (SUCCEEDED(hr))
    {
		pGraph->RenderFile(L"C:\\Documents and Settings\\BTC\\Desktop\\123.avi", NULL);
        // Run the graph.
        hr = pControl->Run();
	
        if (SUCCEEDED(hr))
        {
            // Wait for completion.
            long evCode;
            pEvent->WaitForCompletion(INFINITE, &evCode);

            // Note: Do not use INFINITE in a real application, because it
            // can block indefinitely.
        }
    }

long lWidth, lHeight; 
hr = pWc->GetNativeVideoSize(&lWidth, &lHeight, NULL, NULL); 
if (SUCCEEDED(hr))
{
    RECT rcSrc, rcDest; 
    // Set the source rectangle.
    SetRect(&rcSrc, 0, 0, lWidth, lHeight); 
    
    // Get the window client area.
    GetClientRect(&rcDest); 
    // Set the destination rectangle.
    SetRect(&rcDest, 0, 0, rcDest.right, rcDest.bottom); 
    
    // Set the video position.
    hr = pWc->SetVideoPosition(&rcSrc, &rcDest); 
}
    
 	pWc->Release();
    pControl->Release();
    pEvent->Release();
    pGraph->Release();
    CoUninitialize();
}
HRESULT InitWindowlessVMR( 
    HWND hwndApp,                  // Window to hold the video. 
    IGraphBuilder* pGraph,         // Pointer to the Filter Graph Manager. 
    IVMRWindowlessControl** ppWc   // Receives a pointer to the VMR.
    ) 
{ 
    if (!pGraph || !ppWc) 
    {
        return E_POINTER;
    }
    IBaseFilter* pVmr = NULL; 
    IVMRWindowlessControl* pWc = NULL; 
    // Create the VMR. 
    HRESULT hr = CoCreateInstance(CLSID_VideoMixingRenderer, NULL, 
        CLSCTX_INPROC, IID_IBaseFilter, (void**)&pVmr); 
    if (FAILED(hr))
    {
        return hr;
    }
    
    // Add the VMR to the filter graph.
    hr = pGraph->AddFilter(pVmr, L"Video Mixing Renderer"); 
    if (FAILED(hr)) 
    {
        pVmr->Release();
        return hr;
    }
    // Set the rendering mode.  
    IVMRFilterConfig* pConfig; 
    hr = pVmr->QueryInterface(IID_IVMRFilterConfig, (void**)&pConfig); 
    if (SUCCEEDED(hr)) 
    { 
        hr = pConfig->SetRenderingMode(VMRMode_Windowless); 
        pConfig->Release(); 
    }
    if (SUCCEEDED(hr))
    {
        // Set the window. 
        hr = pVmr->QueryInterface(IID_IVMRWindowlessControl, (void**)&pWc);
        if( SUCCEEDED(hr)) 
        { 
            hr = pWc->SetVideoClippingWindow(hwndApp); 
            if (SUCCEEDED(hr))
            {
                *ppWc = pWc; // Return this as an AddRef'd pointer. 
            }
            else
            {
                // An error occurred, so release the interface.
                pWc->Release();
            }
        } 
    } 
    pVmr->Release(); 
    return hr; 
}

推荐答案

以下是在MFC中使用无窗口模式在应用程序中播放视频的解决方案。



Here is the solution to play the video within the application using windowless mode in MFC.

// PlaybackDlg.h : header file
//
#pragma comment(lib,"Strmiids.lib")
#pragma once

#include <dshow.h>
// CPlaybackDlg dialog
class CPlaybackDlg : public CDialog
{
// Construction
public:
	CPlaybackDlg(CWnd* pParent = NULL);	// standard constructor

// Dialog Data
	enum { IDD = IDD_PLAYBACK_DIALOG };

	protected:
	virtual void DoDataExchange(CDataExchange* pDX);	// DDX/DDV support


// Implementation
protected:
	HICON m_hIcon;

	// Generated message map functions
	virtual BOOL OnInitDialog();
	afx_msg void OnSysCommand(UINT nID, LPARAM lParam);
	afx_msg void OnPaint();
	afx_msg HCURSOR OnQueryDragIcon();
	DECLARE_MESSAGE_MAP()
public:
	afx_msg void OnBnClickedPlayBtn();
	IGraphBuilder *pGraph;
    IMediaControl *pControl;
    IMediaEventEx   *pEvent;
	IVMRWindowlessControl *pWc;
	RECT rcSrc, rcDest;
	HWND hwnd;
	HRESULT InitWindowlessVMR( 
    HWND hwndApp,                  // Window to hold the video. 
    IGraphBuilder* pGraph,         // Pointer to the Filter Graph Manager. 
    IVMRWindowlessControl** ppWc   // Receives a pointer to the VMR.
    ) ;
	
};

</dshow.h>







// PlaybackDlg.cpp : implementation file
//

#include "stdafx.h"
#include "Playback.h"
#include "PlaybackDlg.h"


#ifdef _DEBUG
#define new DEBUG_NEW
#endif


// CAboutDlg dialog used for App About

class CAboutDlg : public CDialog
{
public:
	CAboutDlg();

// Dialog Data
	enum { IDD = IDD_ABOUTBOX };

	protected:
	virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support

// Implementation
protected:
	DECLARE_MESSAGE_MAP()
};

CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD)
{
}

void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
}

BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
END_MESSAGE_MAP()


// CPlaybackDlg dialog




CPlaybackDlg::CPlaybackDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CPlaybackDlg::IDD, pParent)
{
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CPlaybackDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
}

BEGIN_MESSAGE_MAP(CPlaybackDlg, CDialog)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	//}}AFX_MSG_MAP
	ON_BN_CLICKED(IDC_PLAY_BTN, &CPlaybackDlg::OnBnClickedPlayBtn)
END_MESSAGE_MAP()


// CPlaybackDlg message handlers

BOOL CPlaybackDlg::OnInitDialog()
{
	CDialog::OnInitDialog();

	// Add "About..." menu item to system menu.

	// IDM_ABOUTBOX must be in the system command range.
	ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
	ASSERT(IDM_ABOUTBOX < 0xF000);

	CMenu* pSysMenu = GetSystemMenu(FALSE);
	if (pSysMenu != NULL)
	{
		CString strAboutMenu;
		strAboutMenu.LoadString(IDS_ABOUTBOX);
		if (!strAboutMenu.IsEmpty())
		{
			pSysMenu->AppendMenu(MF_SEPARATOR);
			pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
		}
	}

	// Set the icon for this dialog.  The framework does this automatically
	//  when the application's main window is not a dialog
	SetIcon(m_hIcon, TRUE);			// Set big icon
	SetIcon(m_hIcon, FALSE);		// Set small icon

	// TODO: Add extra initialization here

	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CPlaybackDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
	if ((nID & 0xFFF0) == IDM_ABOUTBOX)
	{
		CAboutDlg dlgAbout;
		dlgAbout.DoModal();
	}
	else
	{
		CDialog::OnSysCommand(nID, lParam);
	}
}

// If you add a minimize button to your dialog, you will need the code below
//  to draw the icon.  For MFC applications using the document/view model,
//  this is automatically done for you by the framework.

void CPlaybackDlg::OnPaint()
{
	if (IsIconic())
	{
		CPaintDC dc(this); // device context for painting
    RECT        rcClient; 
    GetClientRect(&rcClient); 
    if (pWc != NULL) 
    { 
        // Find the region where the application can paint by subtracting 
        // the video destination rectangle from the client area.
        // (Assume that g_rcDest was calculated previously.)
        HRGN rgnClient = CreateRectRgnIndirect(&rcClient); 
        HRGN rgnVideo  = CreateRectRgnIndirect(&rcDest);  
        CombineRgn(rgnClient, rgnClient, rgnVideo, RGN_DIFF);  
        
        // Paint on window.
        HBRUSH hbr = GetSysColorBrush(COLOR_BTNFACE); 
		FillRgn(dc.m_hDC, rgnClient, hbr); 

        // Clean up.
        DeleteObject(hbr); 
        DeleteObject(rgnClient); 
        DeleteObject(rgnVideo); 

        // Request the VMR to paint the video.
		HRESULT hr = pWc->RepaintVideo(hwnd, dc.m_hDC);  
    } 
    else  // There is no video, so paint the whole client area. 
    { 
		FillRect(dc.m_hDC, &rcClient, (HBRUSH)(COLOR_BTNFACE + 1)); 
    } 
//-----------------------------------------------------------------------------------------------------------//
		SendMessage(WM_ICONERASEBKGND, reinterpret_cast<wparam>(dc.GetSafeHdc()), 0);

		// Center icon in client rectangle
		int cxIcon = GetSystemMetrics(SM_CXICON);
		int cyIcon = GetSystemMetrics(SM_CYICON);
		CRect rect;
		GetClientRect(&rect);
		int x = (rect.Width() - cxIcon + 1) / 2;
		int y = (rect.Height() - cyIcon + 1) / 2;

		// Draw the icon
		dc.DrawIcon(x, y, m_hIcon);
	}
	else
	{
		CDialog::OnPaint();
	}
//-------------------------------------------------------------------------------------------------------//
}

// The system calls this function to obtain the cursor to display while the user drags
//  the minimized window.
HCURSOR CPlaybackDlg::OnQueryDragIcon()
{
	return static_cast<hcursor>(m_hIcon);
}


void CPlaybackDlg::OnBnClickedPlayBtn()
{
	// TODO: Add your control notification handler code here

HRESULT hr = CoInitialize(NULL);
    if (FAILED(hr))
    {
        MessageBox(L"ERROR - Could not initialize COM library");
        return;
    }

    // Create the filter graph manager and query for interfaces.
    hr = CoCreateInstance(CLSID_FilterGraph, NULL, CLSCTX_INPROC_SERVER, 
                        IID_IGraphBuilder, (void **)&pGraph);
    if (FAILED(hr))
    {
        MessageBox(L"ERROR - Could not create the Filter Graph Manager.");
        return;
    }

    hr = pGraph->QueryInterface(IID_IMediaControl, (void **)&pControl);
    hr = pGraph->QueryInterface(IID_IMediaEvent, (void **)&pEvent);
	

	hr = InitWindowlessVMR(AfxGetMainWnd()->m_hWnd, pGraph, &pWc);
	hr=pGraph->RenderFile(L"C:\\Documents and Settings\\BTC\\Desktop\\hai.mp4", NULL);
	long lWidth, lHeight; 
	hr = pWc->GetNativeVideoSize(&lWidth, &lHeight, NULL, NULL); 
if (SUCCEEDED(hr))
{
    RECT rcSrc, rcDest; 
    // Set the source rectangle.
    SetRect(&rcSrc, 0, 0, lWidth, lHeight); 
    
    // Get the window client area.
    GetClientRect(&rcDest); 
    // Set the destination rectangle.
    SetRect(&rcDest, 0, 0, rcDest.right, rcDest.bottom-40); 
    
    // Set the video position.
    hr = pWc->SetVideoPosition(&rcSrc, &rcDest); 
}
	
	if (SUCCEEDED(hr))
    {
		
        // Run the graph.
        hr = pControl->Run();
	
        if (SUCCEEDED(hr))
        {
            // Wait for completion.
            long evCode;
            pEvent->WaitForCompletion(11000, &evCode);
			

            // Note: Do not use INFINITE in a real application, because it
            // can block indefinitely.
        }
    }
   
 	pWc->Release();
    pControl->Release();
    pGraph->Release();
	pEvent->Release();
    CoUninitialize();
}
HRESULT CPlaybackDlg::InitWindowlessVMR( 
    HWND hwndApp,                  // Window to hold the video. 
    IGraphBuilder* pGraph,         // Pointer to the Filter Graph Manager. 
    IVMRWindowlessControl** ppWc   // Receives a pointer to the VMR.
    ) 
{ 
    if (!pGraph || !ppWc) 
    {
        return E_POINTER;
    }
    IBaseFilter* pVmr = NULL; 
    IVMRWindowlessControl* pWc = NULL; 
    // Create the VMR. 
    HRESULT hr = CoCreateInstance(CLSID_VideoMixingRenderer, NULL, 
        CLSCTX_INPROC, IID_IBaseFilter, (void**)&pVmr); 
    if (FAILED(hr))
    {
        return hr;
    }
    
    // Add the VMR to the filter graph.
    hr = pGraph->AddFilter(pVmr, L"Video Mixing Renderer"); 
    if (FAILED(hr)) 
    {
        pVmr->Release();
        return hr;
    }
    // Set the rendering mode.  
    IVMRFilterConfig* pConfig; 
    hr = pVmr->QueryInterface(IID_IVMRFilterConfig, (void**)&pConfig); 
    if (SUCCEEDED(hr)) 
    { 
        hr = pConfig->SetRenderingMode(VMRMode_Windowless); 
        pConfig->Release(); 
    }
    if (SUCCEEDED(hr))
    {
        // Set the window. 
        hr = pVmr->QueryInterface(IID_IVMRWindowlessControl, (void**)&pWc);
        if( SUCCEEDED(hr)) 
        { 
            hr = pWc->SetVideoClippingWindow(hwndApp); 
            if (SUCCEEDED(hr))
            {
                *ppWc = pWc; // Return this as an AddRef'd pointer. 
            }
            else
            {
                // An error occurred, so release the interface.
                pWc->Release();
            }
        } 
    } 
    pVmr->Release(); 
    return hr; 
} 

</hcursor></wparam>


这篇关于如何在MFC中的应用程序中播放视频。的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！

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