更改文件名时，录制开始超时3秒。

Question

在一个graph.One中使用两个wmv过滤器就是制作wmv文件，Anather是用于直播的。

执行流媒体时，当更改文件名时，录制开始超时3秒。因此，新的WMV的头丢失了。这很麻烦。

CAMERA - InfTee Filter - AsfWriter Filter→WMV CAMERA

                        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? 
---------------------------------------------------------------------------

Answer 1

当您重新启动图形时，由于初始化开销，不可避免地会丢失数据片段。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，并在重新初始化具有文件写入的部分时保持捕获。

有关解决此问题的典型解决方案，请参阅DirectShow Bridges。