DirectShow 采集摄像头图像为AVI文件 但是用播放器无法播放这个AVI文件

[season030441]

以下为我的源码，可以看到预览的摄像头画面，test2.avi可以生成，文件大小也正确，但是用QQ影音等播放器却无法播放这个test2.avi文件，提示信息“文件无法渲染”。分数过少可以继续追加！

HRESULT hr;
IGraphBuilder *pGB=NULL;
ICaptureGraphBuilder2* pCGB2=NULL;
IMediaControl *pMediaControl = NULL;
IBaseFilter *pMux =NULL;
IBaseFilter *pWriter=NULL;
IBaseFilter *pCompress=NULL;
IFileSinkFilter2 *pSink=NULL;
IBaseFilter *pSrcFilter =NULL;

hr=CoInitialize(NULL);
if( FAILED(hr))
AfxMessageBox("Initializing COM library failed!");

// 创建IGraphBuilder接口
hr=CoCreateInstance(CLSID_FilterGraph, NULL, CLSCTX_INPROC_SERVER, IID_IGraphBuilder, (void **)&pGB);
if( FAILED(hr))
{
AfxMessageBox("IGraphBuilder failed");
return ;
}
// 创建ICaptureGraphBuilder2接口
hr = CoCreateInstance (CLSID_CaptureGraphBuilder2 ,NULL,CLSCTX_INPROC,IID_ICaptureGraphBuilder2, (void **) &pCGB2);
if( FAILED(hr))
{
AfxMessageBox("IID_ICaptureGraphBuilder2 failed");
return ;
}
pCGB2->SetFiltergraph(pGB);


hr = pGB->QueryInterface(IID_IMediaControl, (void **)&pMediaControl);
if( FAILED(hr))
{
AfxMessageBox("IID_IMediaControl failed");
return ;
}

BindFilter(0,&pSrcFilter);//该函数可以正确运行
pGB->AddFilter(pSrcFilter, L"Capture Filter");



hr=pCGB2->RenderStream(&PIN_CATEGORY_PREVIEW, &MEDIATYPE_Video,pSrcFilter,NULL,NULL);
if( FAILED(hr))
{
AfxMessageBox("RenderStream PIN_CATEGORY_PREVIEW failed");
hr = pCGB2->RenderStream(&PIN_CATEGORY_CAPTURE, &MEDIATYPE_Video,pSrcFilter,NULL,NULL);
if( FAILED(hr))
{
AfxMessageBox("RenderStream PIN_CATEGORY_CAPTURE failed");
return ;
}

}
else
{
AfxMessageBox("预览");
}

hr=pCGB2->SetOutputFileName(&MEDIASUBTYPE_Avi,L"e:\\test2.avi",&pMux,NULL);//生成Avi pMux

if( FAILED(hr))
{
AfxMessageBox("SetOutputFileName failed");
return ;
}
IConfigAviMux *pConfigMux=NULL;
hr=pMux->QueryInterface(IID_IConfigAviMux,(void **)&pConfigMux);
if( FAILED(hr))
{
AfxMessageBox("IID_IConfigAviMux failed");
return ;
}
pConfigMux->SetMasterStream(0);
pConfigMux->Release();


hr=pCGB2->RenderStream(&PIN_CATEGORY_CAPTURE,&MEDIATYPE_Video,pSrcFilter,NULL,pMux);//不带压缩

if( FAILED(hr))
{
AfxMessageBox("记录 PIN_CATEGORY_CAPTURE failed");
return ;
}
pMux->Release();


pMediaControl->Run();

[银点]

把源代码发给我，我帮你调一下

[银点]

//创建File Writer
	hr = ::CoCreateInstance(CLSID_FileWriter,NULL,CLSCTX_INPROC,
									IID_IFileSinkFilter2,(LPVOID*)&FileSink);
	if(FAILED(hr))
		return hr;

	if(FAILED(hr = FileSink->QueryInterface(IID_IBaseFilter,(void**)&FileWriter)))
		return E_NOINTERFACE;

	if(FAILED(hr =Graph->AddFilter(FileWriter,L"File Writer")))
		return hr;

	hr = CaptureGraph->RenderStream(&PIN_CATEGORY_CAPTURE, &MEDIATYPE_Video,
						VideoSourceFilter, VideoEncoder, AviMux);
	if(FAILED(hr))
	{
		MESSAGEBOX("创建视频压缩链路失败");
		return hr;
	}
	CaptureGraph->RenderStream(NULL, &MEDIATYPE_Audio,AudioSourceFilter,
											AudioEncoder, AviMux);
    if(FAILED(hr))
	{
		MESSAGEBOX("创建音频压缩链路失败");
		return hr;
	}
	if(FAILED(hr = ConnectPin(AviMux,FileWriter)))
	{
		MESSAGEBOX("创建文件输出链路失败");
		return hr;
	}

我这个顺序创建的graph 启动采集时这样写的：

HRESULT TCaptureGraph::StartCapture(FileName)
{
	HRESULT hr = FileSink->SetMode(1);  //AM_FILE_OVERRITE
    if(FAILED(hr))
		return hr;
	
	if(FAILED(hr = FileSink->SetFileName(FileName,NULL)))
        return hr;
	hr = MediaControl->Run();
	if(SUCCEEDED(hr))
		this->CaptureState = RUNNING;
	return hr;

}

[mangshe0]

代码 我好久没写了 都忘记了 刚才翻了一下 以前写的工程， 我建议你这样 先使用directshow 的filter 那个工具 叫 ：graphedt 用它先把模型搭建好，然后测试好 测试出来的文件 没有问题能看 最后在编码实现 ds很好玩的 你可以加预览之类的 争取后期自己写filter

[season030441]

除了BindFilter代码没贴出来，全部代码都在这了。我用了graphedt 这个建图过程是可以正常保存avi视频，并可以用播放器正常播放的，但是我这个代码就不行。 BindFilter代码如下： bool CMyCaptureDlg::BindFilter(int nCamID, IBaseFilter **pFilter) { if (nCamID < 0) return false; // enumerate all video capture devices CComPtr<ICreateDevEnum> pCreateDevEnum; HRESULT hr = CoCreateInstance(CLSID_SystemDeviceEnum, NULL, CLSCTX_INPROC_SERVER, IID_ICreateDevEnum, (void**)&pCreateDevEnum); if (hr != NOERROR) { return false; } CComPtr<IEnumMoniker> pEm; hr = pCreateDevEnum->CreateClassEnumerator(CLSID_VideoInputDeviceCategory, &pEm, 0); if (hr != NOERROR) { return false; } pEm->Reset(); ULONG cFetched; IMoniker *pM; int index = 0; while(hr = pEm->Next(1, &pM, &cFetched), hr==S_OK, index <= nCamID) { IPropertyBag *pBag; hr = pM->BindToStorage(0, 0, IID_IPropertyBag, (void **)&pBag); if(SUCCEEDED(hr)) { VARIANT var; var.vt = VT_BSTR; hr = pBag->Read(L"FriendlyName", &var, NULL); if (hr == NOERROR) { if (index == nCamID) { pM->BindToObject(0, 0, IID_IBaseFilter, (void**)pFilter); } char sName[1024]; WideCharToMultiByte(CP_ACP,0,var.bstrVal,-1,sName, 1024 ,"",NULL); CString strTemp; strTemp.Format("%s",sName); AfxMessageBox(strTemp); SysFreeString(var.bstrVal); } pBag->Release(); } pM->Release(); index++; } pCreateDevEnum = NULL; return true; }

[gdstx]

使用pMediaControl->Stop()后, AVI文件就正常了

[season030441]

感谢 “gdstx” 确实好使了！多谢。