Question

求一个用C++读取avi并播放的程序

求一个用C++读取avi并播放的程序, 可以使用授权的第三方插件. 用mfc写的, 代码别太乱:)
如果可以输出每一帧(有选择地)为bmp, 追加100分.

154612763@qq.com

Answer 1

CDigitalvideo::CDigitalvideo()
{
// 初始化成员变量
m_Open = m_Pause = m_Playing = FALSE;
m_DeviceID = 0;
}

CDigitalvideo::~CDigitalvideo()
{
Close ();
}
BOOL CDigitalvideo::GetPause ()//是否暂停
{
return m_Pause;
}
BOOL CDigitalvideo::Open (CString Filename, CWnd *pWnd, int left, int top,int width,int height)
{
if (!m_Open){//如果m_Open=false，没有打开设备
// 初始化成员变量
m_Open = m_Pause = m_Playing = FALSE;
m_DeviceID = 0;
// 文件是否存在
CFileStatus Status;
if (!CFile::GetStatus (Filename, Status))
return FALSE;
// 打开设备
MCI_DGV_OPEN_PARMS MCIOpen;
MCIOpen.lpstrDeviceType = "avivideo";//设置播放设备为视频播放设备
MCIOpen.lpstrElementName = (LPSTR) Filename.GetBuffer (0);//文件名
MCIOpen.wDeviceID = NULL;
MCIOpen.hWndParent = pWnd->m_hWnd;//可播放视频文件窗口指针
MCIOpen.dwStyle = WS_CHILD | WS_VISIBLE;
if (mciSendCommand (NULL, MCI_OPEN, MCI_WAIT | MCI_OPEN_TYPE |
MCI_OPEN_ELEMENT | MCI_DGV_OPEN_PARENT | MCI_DGV_OPEN_WS, (DWORD)(LPVOID) &MCIOpen))
return FALSE;
m_DeviceID = MCIOpen.wDeviceID;
m_Open = TRUE;
// 将文件长度设置为帧
MCI_DGV_SET_PARMS MCISet;
MCISet.dwTimeFormat = MCI_FORMAT_FRAMES;
if (mciSendCommand (m_DeviceID, MCI_SET, MCI_SET_TIME_FORMAT, (DWORD)(LPVOID) &MCISet)){
Close ();
return FALSE;
}
// 找到视频文件的开始位置
mciSendCommand (m_DeviceID, MCI_SEEK, MCI_SEEK_TO_START, NULL);
//将播放画面置于主窗口之中
MCI_DGV_PUT_PARMS MCIPut;
MCIPut.rc.left = left;
MCIPut.rc.top = top;
MCIPut.rc.right = width;
MCIPut.rc.bottom = height;
if (mciSendCommand (m_DeviceID, MCI_PUT, MCI_WAIT | MCI_DGV_PUT_CLIENT |
MCI_DGV_PUT_WINDOW | MCI_DGV_RECT, (DWORD)(LPVOID) &MCIPut)){
Close ();
return FALSE;
}
}
return TRUE;
}
void CDigitalvideo::Close (void)
{
if (m_Open){// 停止播放并关闭设备
if (m_Playing || m_Pause)
mciSendCommand (m_DeviceID, MCI_STOP, NULL, NULL);
mciSendCommand (m_DeviceID, MCI_CLOSE, NULL, NULL);
// 清空成员变量
m_Open = m_Pause = m_Playing = FALSE;
m_DeviceID = NULL;
}
}
//获得视频文件窗口的宽度
int CDigitalvideo::GetWidth (void)
{
if (m_Open){
MCI_DGV_WHERE_PARMS MCIWhere;
if (mciSendCommand (m_DeviceID, MCI_WHERE, MCI_DGV_WHERE_SOURCE,
(DWORD)(LPVOID) &MCIWhere)){
return 0;
}
return (int) MCIWhere.rc.right;
}
return 0;
}
//获得视频文件窗口的高度
int CDigitalvideo::GetHeight (void)
{
if (m_Open){
MCI_DGV_WHERE_PARMS MCIWhere;
if (mciSendCommand (m_DeviceID, MCI_WHERE, MCI_DGV_WHERE_SOURCE,
(DWORD)(LPVOID) &MCIWhere)){
return 0;
}
return (int) MCIWhere.rc.bottom;
}
return 0;
}
BOOL CDigitalvideo::Play (BOOL bLoop, BOOL bFullScreen)
{
if (m_Open){
// 如果是视频的尾部则重新开始播放
if (GetFrame () >= GetFrames ())
mciSendCommand (m_DeviceID, MCI_SEEK, MCI_SEEK_TO_START, NULL);
// 播放
MCI_DGV_PLAY_PARMS MCIPlay;
MCIPlay.dwCallback = NULL;
MCIPlay.dwFrom = GetFrame ();
DWORD dwFlags = MCI_FROM;
if (bLoop)
dwFlags |= MCI_DGV_PLAY_REPEAT;
if (bFullScreen)
dwFlags |= MCI_MCIAVI_PLAY_FULLSCREEN;
if (mciSendCommand (m_DeviceID, MCI_PLAY, dwFlags, (DWORD)(LPVOID) &MCIPlay))
return FALSE;
m_Pause = FALSE;
m_Playing = TRUE;
return TRUE;
}
return FALSE;
}
void CDigitalvideo::Stop (void)
{
if (m_Open && m_Playing){
mciSendCommand (m_DeviceID, MCI_STOP, NULL, NULL);
mciSendCommand (m_DeviceID, MCI_SEEK, MCI_SEEK_TO_START, NULL);
m_Playing = FALSE;
m_Pause = TRUE;
}
}
void CDigitalvideo::Pause( void )
{
if (m_Open ){
MCI_DGV_PAUSE_PARMS MCIPause;
if (mciSendCommand (m_DeviceID, MCI_PAUSE, 0, (DWORD)(LPVOID) &MCIPause))
return;
m_Pause = TRUE;
}
}
int CDigitalvideo::GetFrames (void)
{
if (m_Open){
MCI_DGV_STATUS_PARMS MCIStatus;
MCIStatus.dwItem = MCI_STATUS_LENGTH;
if (mciSendCommand (m_DeviceID, MCI_STATUS, MCI_WAIT |
MCI_STATUS_ITEM, (DWORD)(LPVOID) &MCIStatus))
return 0;
return (int) MCIStatus.dwReturn;
}
return 0;
}
int CDigitalvideo::GetFrame (void)
{
if (m_Open){
MCI_DGV_STATUS_PARMS MCIStatus;
MCIStatus.dwItem = MCI_STATUS_POSITION;
if (mciSendCommand (m_DeviceID, MCI_STATUS, MCI_WAIT |
MCI_STATUS_ITEM, (DWORD)(LPVOID) &MCIStatus))
return -1;
return (int) MCIStatus.dwReturn;
}
return -1;
}
BOOL CDigitalvideo::IsPlaying ()
{
if (m_Open)
{
MCI_DGV_STATUS_PARMS MCIStatus;
MCIStatus.dwItem = MCI_STATUS_MODE;
if (mciSendCommand (m_DeviceID, MCI_STATUS, MCI_WAIT |
MCI_STATUS_ITEM, (DWORD)(LPVOID) &MCIStatus))
return FALSE;
if (MCIStatus.dwReturn == MCI_MODE_PLAY)
{
m_Playing = TRUE;
m_Pause = FALSE;
return TRUE;
}
else if (MCIStatus.dwReturn == MCI_MODE_PAUSE)
{
m_Playing = TRUE;
m_Pause = FALSE;
return TRUE;
}
else
{
m_Playing = FALSE;
m_Pause = FALSE;
return FALSE;
}
}
return FALSE;
}
BOOL CDigitalvideo::SeekTo (int nFrame)
{
if (m_Open){
MCI_SEEK_PARMS MCISeek;
MCISeek.dwTo = nFrame;
if (m_Playing && !m_Pause)
mciSendCommand (m_DeviceID, MCI_PAUSE, 0, NULL);
if (mciSendCommand (m_DeviceID, MCI_SEEK, MCI_TO |
MCI_WAIT, (DWORD)(LPVOID) &MCISeek))
return FALSE;
if (m_Playing && !m_Pause)
Play ();
return TRUE;
}
return FALSE;
}
void CDigitalvideo::Forward (int nFrames)
{
if (m_Open){
if (m_Playing && !m_Pause)
Pause ();
MCI_DGV_STEP_PARMS MCIStep;
MCIStep.dwFrames = nFrames;
mciSendCommand (m_DeviceID, MCI_STEP, MCI_DGV_STEP_FRAMES,
(DWORD)(LPVOID) &MCIStep);
}
}
void CDigitalvideo::Backward (int nFrames)
{
if (m_Open){
if (m_Playing && !m_Pause)
Pause ();
MCI_DGV_STEP_PARMS MCIStep;
MCIStep.dwFrames = nFrames;
mciSendCommand (m_DeviceID, MCI_STEP, MCI_DGV_STEP_REVERSE |
MCI_DGV_STEP_FRAMES, (DWORD)(LPVOID) &MCIStep);
}
}
int CDigitalvideo::GetSpeed (void)
{
if (m_Open){
MCI_DGV_STATUS_PARMS MCIStatus;
MCIStatus.dwItem = MCI_DGV_STATUS_SPEED;
if (mciSendCommand (m_DeviceID, MCI_STATUS, MCI_WAIT |
MCI_STATUS_ITEM, (DWORD)(LPVOID) &MCIStatus))
return -1;
return (int) MCIStatus.dwReturn;
}
return -1;
}
void CDigitalvideo::SetSpeed (int nSpeed)
{
if (m_Open){
MCI_DGV_SET_PARMS MCISet;
MCISet.dwSpeed = nSpeed;
mciSendCommand (m_DeviceID, MCI_SET, MCI_WAIT |
MCI_DGV_SET_SPEED, (DWORD)(LPVOID) &MCISet);
}
}
/*void CDigitalvideo::SetSound (BOOL bSound)
{
if (m_Open)
{
MCI_DGV_SET_PARMS MCISet;
MCISet.dwAudio = MCI_SET_AUDIO_ALL;
DWORD dwFlags = MCI_SET_AUDIO;
if (bSound)
dwFlags |= MCI_SET_ON;
else
dwFlags |= MCI_SET_OFF;
mciSendCommand (m_DeviceID, MCI_SET, dwFlags, (DWORD)(LPVOID) &MCISet);
}
}
BOOL CDigitalvideo::GetSound (void)
{
if (m_Open)
{
MCI_DGV_STATUS_PARMS MCIStatus;
MCIStatus.dwItem = MCI_DGV_STATUS_AUDIO;
if (mciSendCommand (m_DeviceID, MCI_STATUS, MCI_WAIT |
MCI_STATUS_ITEM, (DWORD)(LPVOID) &MCIStatus))
return FALSE;
if (MCIStatus.dwReturn == MCI_ON)
return TRUE;
else
return FALSE;
}

return FALSE;
}*/

Answer 2

囧- -是工作需要还是毕业设计哦。现在精通C++的太少了，广东这边随便一个C++的程序员最低工资都是3000以上，三年经验的一般都6000多，广大企业招不到C++程序员。会C++，而且懂图形解码的的人几乎不会出现在百度知道，可见你在这里问也没什么效果。希望你找到更好的途径解决这问题。

Answer 3

用directshow，可以迅速写出一个例子来。