Question

问题：为什么我的过滤器图形在GraphEditPlus中工作但在我的程序中不起作用？

嗨，大家好，我正在为索尼FCB-EV7500构建一个万向节系统，并遇到了一些问题。我刚刚购买了hauppauge colossus来将相机组件带到我的电脑上。经过几个小时试图弄清楚DirectShow是如何工作的，我最终得到了一个有效的过滤器图。

Filter Graph 1

C＃代码如下所示：

 //graph builder
        ICaptureGraphBuilder2 pBuilder = (ICaptureGraphBuilder2)new CaptureGraphBuilder2();
        hr = pBuilder.SetFiltergraph(pGraph);
        checkHR(hr, "Can't SetFiltergraph");

        Guid CLSID_WDMStreamingCrossbars = new Guid("{A799A801-A46D-11D0-A18C-00A02401DCD4}");
        Guid CLSID_WDMStreamingCaptureDevices = new Guid("{65E8773D-8F56-11D0-A3B9-00A0C9223196}"); 
        Guid CLSID_WDMStreamingEncoderDevices = new Guid("{19689BF6-C384-48FD-AD51-90E58C79F70B}");
        Guid CLSID_ArcSoftMPEGDemux = new Guid("{D5F9370B-E232-464F-BE29-A885B1249190}"); //ArcDemux.ax
        Guid CLSID_ArcSoftVideoDecoder = new Guid("{B793E9A8-C53E-4845-9DE9-C32326EACCAD}"); //ASVid.ax
        Guid CLSID_VideoRenderer = new Guid("{6BC1CFFA-8FC1-4261-AC22-CFB4CC38DB50}"); //quartz.dll

        //add Hauppauge Colossus Crossbar 0
        IBaseFilter pHauppaugeColossusCrossbar0 = CreateFilterByName(@"Hauppauge Colossus Crossbar 0", CLSID_WDMStreamingCrossbars);
        hr = pGraph.AddFilter(pHauppaugeColossusCrossbar0, "Hauppauge Colossus Crossbar 0");
        checkHR(hr, "Can't add Hauppauge Colossus Crossbar 0 to graph");

        //add Hauppauge Colossus Capture 0
        IBaseFilter pHauppaugeColossusCapture0 = CreateFilterByName(@"Hauppauge Colossus Capture 0", CLSID_WDMStreamingCaptureDevices);
        hr = pGraph.AddFilter(pHauppaugeColossusCapture0, "Hauppauge Colossus Capture 0");
        checkHR(hr, "Can't add Hauppauge Colossus Capture 0 to graph");

        //add Hauppauge Colossus TS Encoder 0
        IBaseFilter pHauppaugeColossusTSEncoder0 = CreateFilterByName(@"Hauppauge Colossus TS Encoder 0", CLSID_WDMStreamingEncoderDevices);
        hr = pGraph.AddFilter(pHauppaugeColossusTSEncoder0, "Hauppauge Colossus TS Encoder 0");
        checkHR(hr, "Can't add Hauppauge Colossus TS Encoder 0 to graph");

        //add ArcSoft MPEG Demux
        IBaseFilter pArcSoftMPEGDemux = (IBaseFilter)Activator.CreateInstance(Type.GetTypeFromCLSID(CLSID_ArcSoftMPEGDemux));

        IPin outPutPin;
        AMMediaType PinType = new AMMediaType();
        PinType.majorType = MediaType.Video;
        PinType.subType = MediaSubType.H264;
        hr = (pArcSoftMPEGDemux as IMpeg2Demultiplexer).CreateOutputPin(PinType, "Video", out outPutPin);
        checkHR(hr, "Can't add Output Pin to ArcSoft MPEG Demux");

        hr = pGraph.AddFilter(pArcSoftMPEGDemux, "ArcSoft MPEG Demux");
        checkHR(hr, "Can't add ArcSoft MPEG Demux to graph");

        //add ArcSoft Video Decoder
        IBaseFilter pArcSoftVideoDecoder = (IBaseFilter)Activator.CreateInstance(Type.GetTypeFromCLSID(CLSID_ArcSoftVideoDecoder));
        hr = pGraph.AddFilter(pArcSoftVideoDecoder, "ArcSoft Video Decoder");
        checkHR(hr, "Can't add ArcSoft Video Decoder to graph");

        //add Video Renderer
        IBaseFilter pVideoRenderer = (IBaseFilter)Activator.CreateInstance(Type.GetTypeFromCLSID(CLSID_VideoRenderer));
        hr = pGraph.AddFilter(pVideoRenderer, "Video Renderer");
        checkHR(hr, "Can't add Video Renderer to graph");

        //connect Hauppauge Colossus Crossbar 0 and Hauppauge Colossus Capture 0
        hr = pGraph.ConnectDirect(GetPin(pHauppaugeColossusCrossbar0, "0: Video Decoder Out"), GetPin(pHauppaugeColossusCapture0, "Analog Video In"), null);
        checkHR(hr, "Can't connect Hauppauge Colossus Crossbar 0 and Hauppauge Colossus Capture 0");

        //connect Hauppauge Colossus Capture 0 and Hauppauge Colossus TS Encoder 0
        hr = pGraph.ConnectDirect(GetPin(pHauppaugeColossusCapture0, "Virtual Video Out"), GetPin(pHauppaugeColossusTSEncoder0, "Virtual Video Out"), null);
        checkHR(hr, "Can't connect Hauppauge Colossus Capture 0 and Hauppauge Colossus TS Encoder 0");

        //connect Hauppauge Colossus TS Encoder 0 and ArcSoft MPEG Demux
        hr = pGraph.ConnectDirect(GetPin(pHauppaugeColossusTSEncoder0, "AVC TS Out"), GetPin(pArcSoftMPEGDemux, "Input"), null);
        checkHR(hr, "Can't connect Hauppauge Colossus TS Encoder 0 and ArcSoft MPEG Demux");

        //map pinPID for ArcSoft MPEG Demux
        IMPEG2PIDMap pidmap2 = (IMPEG2PIDMap)outPutPin;
        hr = pidmap2.MapPID(1, new int[1] { 0x1011 }, MediaSampleContent.ElementaryStream);
        checkHR(hr, "Can't map video output pin pid to ArcSoft MPEG Demux");

        //connect ArcSoft MPEG Demux and ArcSoft Video Decoder
        hr = pGraph.ConnectDirect(GetPin(pArcSoftMPEGDemux, "Video"), GetPin(pArcSoftVideoDecoder, "Video In"), null);
        checkHR(hr, "Can't connect MPEG-2 Demultiplexer and ArcSoft Video Decoder");

        //connect ArcSoft Video Decoder and Video Renderer
        hr = pGraph.ConnectDirect(GetPin(pArcSoftVideoDecoder, "Video Out"), GetPin(pVideoRenderer, "VMR Input0"), null);
        checkHR(hr, "Can't connect ArcSoft Video Decoder and Video Renderer");

使用此图表一切正常。我可以在表单上显示相机的视频，然后在其上创建一个透明的表单，并使用GDI +构建我的屏幕显示。我仍想添加到OSD的两件事是当前的FPS计数，当我在操纵杆上拉动扳机时，我想捕获屏幕并将其保存到磁盘。

所以为了做到这一点，我相信我需要添加一个样本抓取器过滤器来手动计时FPS并拉出单个帧。我在图表中添加了一个样本抓取器和一个AVI解压缩器，并尝试运行它。

Filter Graph 2

我遇到了直接演出所带来的麻烦，我没想到它会起作用，但令人惊讶的是它确实如此。在GraphEditPlus中显示的视频，我可以看到样本抓取器捕获帧。所以我把它导出到C＃并试图再次运行它。

int hr = 0;

        //graph builder
        ICaptureGraphBuilder2 pBuilder = (ICaptureGraphBuilder2)new CaptureGraphBuilder2();
        hr = pBuilder.SetFiltergraph(pGraph);
        checkHR(hr, "Can't Set Filtergraph");

        Guid CLSID_WDMStreamingCrossbars = new Guid("{A799A801-A46D-11D0-A18C-00A02401DCD4}");
        Guid CLSID_WDMStreamingCaptureDevices = new Guid("{65E8773D-8F56-11D0-A3B9-00A0C9223196}"); 
        Guid CLSID_WDMStreamingEncoderDevices = new Guid("{19689BF6-C384-48FD-AD51-90E58C79F70B}");
        Guid CLSID_ArcSoftMPEGDemux = new Guid("{D5F9370B-E232-464F-BE29-A885B1249190}"); //ArcDemux.ax
        Guid CLSID_ArcSoftVideoDecoder = new Guid("{B793E9A8-C53E-4845-9DE9-C32326EACCAD}"); //ASVid.ax
        Guid CLSID_SampleGrabber = new Guid("{C1F400A0-3F08-11D3-9F0B-006008039E37}"); //qedit.d11

        //add Hauppauge Colossus Crossbar 0
        IBaseFilter pHauppaugeColossusCrossbar0 = CreateFilterByName(@"Hauppauge Colossus Crossbar 0", CLSID_WDMStreamingCrossbars);
        hr = pGraph.AddFilter(pHauppaugeColossusCrossbar0, "Hauppauge Colossus Crossbar 0");
        checkHR(hr, "Can't add Hauppauge Colossus Crossbar 0 to graph");

        //add Hauppauge Colossus Capture 0
        IBaseFilter pHauppaugeColossusCapture0 = CreateFilterByName(@"Hauppauge Colossus Capture 0", CLSID_WDMStreamingCaptureDevices);
        hr = pGraph.AddFilter(pHauppaugeColossusCapture0, "Hauppauge Colossus Capture 0");
        checkHR(hr, "Can't add Hauppauge Colossus Capture 0 to graph");

        //add Hauppauge Colossus TS Encoder 0
        IBaseFilter pHauppaugeColossusTSEncoder0 = CreateFilterByName(@"Hauppauge Colossus TS Encoder 0", CLSID_WDMStreamingEncoderDevices);
        hr = pGraph.AddFilter(pHauppaugeColossusTSEncoder0, "Hauppauge Colossus TS Encoder 0");
        checkHR(hr, "Can't add Hauppauge Colossus TS Encoder 0 to graph");

        //add ArcSoft MPEG Demux
        IBaseFilter pArcSoftMPEGDemux = (IBaseFilter)Activator.CreateInstance(Type.GetTypeFromCLSID(CLSID_ArcSoftMPEGDemux));
        //add Video output map
        IPin outPutPin;
        AMMediaType PinType = new AMMediaType();
        PinType.majorType = MediaType.Video;
        PinType.subType = MediaSubType.H264;
        hr = (pArcSoftMPEGDemux as IMpeg2Demultiplexer).CreateOutputPin(PinType, "Video", out outPutPin);
        checkHR(hr, "Can't add Output Pin to ArcSoft MPEG Demux");
        hr = pGraph.AddFilter(pArcSoftMPEGDemux, "ArcSoft MPEG Demux");
        checkHR(hr, "Can't add ArcSoft MPEG Demux to graph");

        //add ArcSoft Video Decoder
        IBaseFilter pArcSoftVideoDecoder = (IBaseFilter)Activator.CreateInstance(Type.GetTypeFromCLSID(CLSID_ArcSoftVideoDecoder));
        hr = pGraph.AddFilter(pArcSoftVideoDecoder, "ArcSoft Video Decoder");
        checkHR(hr, "Can't add ArcSoft Video Decoder to graph");

        //add SampleGrabber
        IBaseFilter pSampleGrabber = (IBaseFilter)Activator.CreateInstance(Type.GetTypeFromCLSID(CLSID_SampleGrabber));
        hr = pGraph.AddFilter(pSampleGrabber, "SampleGrabber");
        checkHR(hr, "Can't add SampleGrabber to graph");
        (pSampleGrabber as ISampleGrabber).SetCallback(this, 0);

        /*
        AMMediaType pSampleGrabber_pmt = new AMMediaType();
        pSampleGrabber_pmt.majorType = MediaType.Video;
        pSampleGrabber_pmt.subType = MediaSubType.YUY2;
        pSampleGrabber_pmt.formatType = FormatType.VideoInfo;
        pSampleGrabber_pmt.fixedSizeSamples = true;
        pSampleGrabber_pmt.formatSize = 88;
        pSampleGrabber_pmt.sampleSize = 4147200;
        pSampleGrabber_pmt.temporalCompression = false;
        VideoInfoHeader pSampleGrabber_format = new VideoInfoHeader();
        pSampleGrabber_format.SrcRect = new DsRect();
        pSampleGrabber_format.SrcRect.right = 1920;
        pSampleGrabber_format.SrcRect.bottom = 1080;
        pSampleGrabber_format.TargetRect = new DsRect();
        pSampleGrabber_format.TargetRect.right = 1920;
        pSampleGrabber_format.TargetRect.bottom = 1080;
        pSampleGrabber_format.BitRate = 4000000;
        pSampleGrabber_format.AvgTimePerFrame = 333667;
        pSampleGrabber_format.BmiHeader = new BitmapInfoHeader();
        pSampleGrabber_format.BmiHeader.Size = 40;
        pSampleGrabber_format.BmiHeader.Width = 1920;
        pSampleGrabber_format.BmiHeader.Height = 1080;
        pSampleGrabber_format.BmiHeader.Planes = 1;
        pSampleGrabber_format.BmiHeader.BitCount = 16;
        pSampleGrabber_format.BmiHeader.Compression = 844715353;
        pSampleGrabber_format.BmiHeader.ImageSize = 4147200;
        pSampleGrabber_pmt.formatPtr = Marshal.AllocCoTaskMem(Marshal.SizeOf(pSampleGrabber_format));
        Marshal.StructureToPtr(pSampleGrabber_format, pSampleGrabber_pmt.formatPtr, false);
        hr = ((ISampleGrabber)pSampleGrabber).SetMediaType(pSampleGrabber_pmt);
        DsUtils.FreeAMMediaType(pSampleGrabber_pmt);
        checkHR(hr, "Can't set media type to sample grabber");
        */

        //add AVI Decompressor
        IBaseFilter pAVIDecompressor2 = (IBaseFilter)new AVIDec();
        hr = pGraph.AddFilter(pAVIDecompressor2, "AVI Decompressor");
        checkHR(hr, "Can't add AVI Decompressor to graph");

        //connect Hauppauge Colossus Crossbar 0 and Hauppauge Colossus Capture 0
        hr = pGraph.ConnectDirect(GetPin(pHauppaugeColossusCrossbar0, "0: Video Decoder Out"), GetPin(pHauppaugeColossusCapture0, "Analog Video In"), null);
        checkHR(hr, "Can't connect Hauppauge Colossus Crossbar 0 and Hauppauge Colossus Capture 0");

        //connect Hauppauge Colossus Capture 0 and Hauppauge Colossus TS Encoder 0
        hr = pGraph.ConnectDirect(GetPin(pHauppaugeColossusCapture0, "Virtual Video Out"), GetPin(pHauppaugeColossusTSEncoder0, "Virtual Video Out"), null);
        checkHR(hr, "Can't connect Hauppauge Colossus Capture 0 and Hauppauge Colossus TS Encoder 0");

        //connect Hauppauge Colossus TS Encoder 0 and ArcSoft MPEG Demux
        hr = pGraph.ConnectDirect(GetPin(pHauppaugeColossusTSEncoder0, "AVC TS Out"), GetPin(pArcSoftMPEGDemux, "Input"), null);
        checkHR(hr, "Can't connect Hauppauge Colossus TS Encoder 0 and ArcSoft MPEG Demux");

        //map pinPID for ArcSoft MPEG Demux
        IMPEG2PIDMap pidmap2 = (IMPEG2PIDMap)outPutPin;
        hr = pidmap2.MapPID(1, new int[1] { 0x1011 }, MediaSampleContent.ElementaryStream);
        checkHR(hr, "Can't map video output pin pid to ArcSoft MPEG Demux");

        //connect ArcSoft MPEG Demux and ArcSoft Video Decoder
        hr = pGraph.ConnectDirect(GetPin(pArcSoftMPEGDemux, "Video"), GetPin(pArcSoftVideoDecoder, "Video In"), null);
        checkHR(hr, "Can't connect MPEG-2 Demultiplexer and ArcSoft Video Decoder");

        //connect ArcSoft Video Decoder and SampleGrabber
        hr = pGraph.ConnectDirect(GetPin(pArcSoftVideoDecoder, "Video Out"), GetPin(pSampleGrabber, "Input"), null);
        checkHR(hr, "Can't connect ArcSoft Video Decoder and SampleGrabber");

        //connect SampleGrabber and AVI Decompressor
        hr = pGraph.ConnectDirect(GetPin(pSampleGrabber, "Output"), GetPin(pAVIDecompressor2, "XForm In"), null);
        checkHR(hr, "Can't connect SampleGrabber and AVI Decompressor");

        //add Video Renderer
        IBaseFilter pVideoRenderer = (IBaseFilter)new VideoRenderer();
        hr = pGraph.AddFilter(pVideoRenderer, "Video Renderer");
        checkHR(hr, "Can't add Video Renderer to graph");

        //connect AVI Decompressor and Video Renderer
        hr = pGraph.ConnectDirect(GetPin(pAVIDecompressor2, "XForm Out"), GetPin(pVideoRenderer, "Input"), null);
        checkHR(hr, "Can't connect AVI Decompressor and Video Renderer");

现在我得到的只是一个黑屏，我无法弄清楚原因。我试图确保样本采集器的媒体类型是正确的，但说实话我并不确定我在做什么。（这是我第一次使用直接显示）任何帮助都很感激解决这个问题。谢谢你的帮助！

更新我通过Peter Kostov的指示远程成功连接到我的图表，我想我找出了它无法正常工作的原因。

解码器似乎没有连接到样本采集卡。我介入了该方法，但没有错误。

  //connect ArcSoft Video Decoder and SampleGrabber
  hr = pGraph.ConnectDirect(GetPin(pArcSoftVideoDecoder, "Video Out"),     GetPin(pSampleGrabber, "Input"), null);
  checkHR(hr, "Can't connect ArcSoft Video Decoder and SampleGrabber");

它似乎运行正常，但输出仍未连接。

Answer 1

好吧，我终于通过在示例抓取器的输出中添加一个null渲染器来解决它。然后我将样本采集器的媒体类型从YUY2更改为RGB24，并使用样本采集器的回调将数据转换为位图，然后我所要做的就是将它显示在图片框上。谢谢你的帮助！

DirectShow.Net滤镜图黑屏

1 个答案: