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社区首页 >问答首页 >DirectShow.Net滤波图黑屏

问DirectShow.Net滤波图黑屏
EN

Stack Overflow用户
提问于 2014-08-27 00:39:46
回答 1查看 1.5K关注 0票数 0

问题:为什么我的筛选图在GraphEditPlus中工作，而在我的程序中不工作？

嗨，伙计们，我正在为索尼FCB- of 7500构建一个万向节系统，遇到了一些问题。我刚买了一台巨巨象，把相机组件拿出来放进我的电脑里。经过数小时的努力，我终于得到了一个有效的过滤图。

​

​

C#代码如下所示：

代码语言：javascript
复制
 //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");

使用这个图表，一切都很好。我可以在一个窗体上显示摄像机的视频，然后在此基础上创建一个透明的窗体，并使用GDI+构建屏幕上的显示。我仍然想添加到我的OSD的两件事情是当前的FPS计数，当我在我的操纵杆上扣动扳机时，我想捕捉屏幕并将它保存到磁盘中。

因此，为了做到这一点，我相信，我需要添加一个样本抓取过滤器，以时间的FPS手动和拉出单独的框架。我在图形中添加了一个示例抓取器和一个AVI解压缩器，并试图运行它。

​

​

尽管我在直接表演中遇到了这么多麻烦，但我没想到它会奏效，但令人惊讶的是，它确实起了作用。在GraphEditPlus中，所显示的视频和我可以看到的抓取样本捕捉帧。因此，我将其导出到C#，并试图再次运行它。

代码语言：javascript
复制
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色的屏幕，我不知道为什么。我试着确保抓取样本的媒体类型是正确的，但老实说，我并不确定我在做什么。(这是我第一次使用直接显示)任何帮助都能解决这个问题。谢谢你的帮助！

UPDATE我通过Peter的指令成功地连接到了我的图形，我想我知道了为什么它不能工作。

​

​

看来解码器并没有连接到采样采集器。我通过了这个方法，但没有发现任何错误。

代码语言：javascript
复制
  //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");

它似乎运行良好，但输出仍然没有连接。

c#
directshow
directshow.net
EN

回答 1

Stack Overflow用户

回答已采纳

发布于 2014-08-28 03:29:16

最后，我通过在示例抓取器的输出中添加一个空呈现器来解决这个问题。然后，我将示例抓取器的媒体类型从YUY2更改为RGB24，并使用示例抓取器的调用将数据转换为位图，然后将其显示在图片框中。谢谢你们的帮助！

票数 0
EN
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：

https://stackoverflow.com/questions/25517229

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