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在图中使用两个 ASFWriter 过滤器。一个用于制作 wmv 文件，Anather 用于实时流式传输。

进行流式传输，更改文件名时，Recording Start 会延迟 3 秒。所以，一个新的WMV的头不见了。它很困扰。

CAMERA ------ InfTee 过滤器 --- --- AsfWriter 过滤器 → WMV 文件

                        X

麦克风 --- InfTee Filter2 --- --- AsfWriter Filter2 → 直播

void RecStart()
{
        ...

    ConnectFilters(pInfTee,"Infinite Pin Tee Filter(1)",L"Output1",pASFWriter,"ASFWriter",L"Video Input 01"));
    ConnectFilters(pInfTee,"Infinite Pin Tee Filter(2)",L"Output2",pASFWriter2,"ASFWriter",L"Video Input 01"));
    ConnectFilters(pSrcAudio,"Audio Source",L"Capture",pInfTee2,"Infinite Pin Tee Filter",L"Input"));
    ConnectFilters(pInfTee2,"Infinite Pin Tee Filter(1)A",L"Output1",pASFWriter,"ASFWriter",L"Audio Input 01"));
    ConnectFilters(pInfTee2,"Infinite Pin Tee Filter(2)A",L"Output2",pASFWriter2,"ASFWriter",L"Audio Input 01"));


    pASFWriter2->QueryInterface(IID_IConfigAsfWriter,(void**)&pConfig);

    pConfig->QueryInterface(IID_IServiceProvider,(void**)&pProvider);

    pProvider->QueryService(IID_IWMWriterAdvanced2, IID_IWMWriterAdvanced2, (void**)&mpWriter2);

    mpWriter2->SetLiveSource(TRUE);

    mpWriter2->RemoveSink(0);

    WMCreateWriterNetworkSink(&mpNetSink);

    DWORD dwPort = (DWORD)streamingPortNo;
    mpNetSink->Open(&dwPort);

    mpNetSink->GetHostURL(url, &url_len);

    hr =mpWriter2->AddSink(mpNetSink);


    pGraph->QueryInterface(IID_IMediaEventEx,(void **)&pMediaIvent);

    pMediaIvent->SetNotifyWindow((OAHWND)this->m_hWnd,WM_GRAPHNOTIFY,0);

    pGraph->QueryInterface(IID_IMediaControl,(void **)&pMediaControl);

    pMediaControl->Run();
}


void OnTimer()
{

    pMediaControl->Stop();

    CComQIPtr<IFileSinkFilter,&IID_IFileSinkFilter> pIFS = pASFWriter;
    pIFS->SetFileName(NewFilename,NULL);

    pMediaControl->Run();
}

---------------------------------------------------------------------------
→ I think ... In order to wait for starting of streaming, 
it is missing for 3 seconds in head of New WMV File.
Are there any measures? 
---------------------------------------------------------------------------
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1 回答 1

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当你重新启动图表时，由于初始化开销，你不可避免地会错过一个数据片段。而且，在不停止图形的情况下切换文件是不可能的。解决方案是使用多个图形并在重新初始化具有文件写入的部分时继续捕获。

有关解决此问题的典型解决方案，请参阅DirectShow Bridges。

于 2012-06-17T07:26:16.880 回答