Hi I have successfully got Directshow outputing a video from C++ MFC using Sample Grabber, but I can not figure out how to play the audio with this. I have attached code snippet of what I have done currently, can anyone tell me what I need to do to get audio stream to work. I have added the sound renderer filter, just dont know how to connect it with the rest of the graph. Thanks HRESULT hr = CoCreateInstance(CLSID_FilterGraph, NULL, CLSCTX_INPROC_SERVER, IID_IGraphBuilder, (void **)&pGraph); hr = pGraph->QueryInterface(IID_IMediaControl, (void **)&pControl); hr = pGraph->QueryInterface(IID_IMediaEventEx, (void **)&pEvent); hr = pGraph->QueryInterface(IID_IBasicAudio, reinterpret_cast<void**>(&m_pAudio)); hr = pGraph->QueryInterface(IID_IMediaSeeking, reinterpret_cast<void**>(&pSeeking)); hr = CoCreateInstance(CLSID_SampleGrabber, NULL, CLSCTX_INPROC_SERVER, IID_IBaseFilter, (void**)&pGrabberF); if (FAILED(hr)) { // Return an error. } hr = pGraph->AddFilter(pGrabberF, L"Sample Grabber"); CoCreateInstance(CLSID_DSoundRender, NULL, CLSCTX_INPROC_SERVER, IID_IBaseFilter, (void**)&g_pSoundRenderer); hr = pGraph->AddFilter(g_pSoundRenderer, NULL); // hr = CoCreateInstance(CLSID_SampleGrabber, NULL, CLSCTX_INPROC_SERVER, IID_IBaseFilter, (void**)&pGrabberF); // hr = pGraph->AddFilter( if (FAILED(hr) ) { // Return an error. } pGrabberF->QueryInterface(IID_ISampleGrabber, (void**)&pGrabber); //ZeroMemory(&mt, sizeof(AM_MEDIA_TYPE)); mt.majortype = MEDIATYPE_Stream; //mt.subtype = GUID_NULL;//MEDIASUBTYPE_RGB24; hr = pGrabber->SetMediaType(&mt); hr = pGraph->AddSourceFilter(fileName.AllocSysString(), L"Source", &pSrc); if (FAILED(hr)) { // Return an error code. } hr = ConnectFilters(pGraph, pSrc, pGrabberF); // Create the NULL renderer and connect hr = CoCreateInstance(CLSID_NullRenderer, NULL, CLSCTX_INPROC_SERVER, IID_IBaseFilter, reinterpret_cast<void**>(&m_pNullRenderer)); hr = pGraph->AddFilter(m_pNullRenderer, L"NullRenderer"); hr = ConnectFilters(pGraph, pGrabberF, m_pNullRenderer);

Hi I have set up a video and connected it to a sample grabber correctly, so that I can see the image, but I cant get sound out, I have tried to render sound, but dont know how to connect it up, any help would be greatly appreciated. I have attached the following code snippet that shows what I have. HRESULT hr = CoCreateInstance(CLSID_FilterGraph, NULL, CLSCTX_INPROC_SERVER, IID_IGraphBuilder, (void **)&pGraph); hr = pGraph->QueryInterface(IID_IMediaControl, (void **)&pControl); hr = pGraph->QueryInterface(IID_IMediaEventEx, (void **)&pEvent); hr = pGraph->QueryInterface(IID_IBasicAudio, reinterpret_cast<void**>(&m_pAudio)); hr = pGraph->QueryInterface(IID_IMediaSeeking, reinterpret_cast<void**>(&pSeeking)); hr = CoCreateInstance(CLSID_SampleGrabber, NULL, CLSCTX_INPROC_SERVER, IID_IBaseFilter, (void**)&pGrabberF); if (FAILED(hr)) { // Return an error. } hr = pGraph->AddFilter(pGrabberF, L"Sample Grabber"); CoCreateInstance(CLSID_DSoundRender, NULL, CLSCTX_INPROC_SERVER, IID_IBaseFilter, (void**)&g_pSoundRenderer); hr = pGraph->AddFilter(g_pSoundRenderer, NULL); // hr = CoCreateInstance(CLSID_SampleGrabber, NULL, CLSCTX_INPROC_SERVER, IID_IBaseFilter, (void**)&pGrabberF); // hr = pGraph->AddFilter( if (FAILED(hr) ) { // Return an error. } pGrabberF->QueryInterface(IID_ISampleGrabber, (void**)&pGrabber); //ZeroMemory(&mt, sizeof(AM_MEDIA_TYPE)); mt.majortype = MEDIATYPE_Stream; //mt.subtype = GUID_NULL;//MEDIASUBTYPE_RGB24; hr = pGrabber->SetMediaType(&mt); hr = pGraph->AddSourceFilter(fileName.AllocSysString(), L"Source", &pSrc); if (FAILED(hr)) { // Return an error code. } hr = ConnectFilters(pGraph, pSrc, pGrabberF); // Create the NULL renderer and connect hr = CoCreateInstance(CLSID_NullRenderer, NULL, CLSCTX_INPROC_SERVER, IID_IBaseFilter, reinterpret_cast<void**>(&m_pNullRenderer)); hr = pGraph->AddFilter(m_pNullRenderer, L"NullRenderer"); hr = ConnectFilters(pGraph, pGrabberF, m_pNullRenderer);

Hi, Its about the SetScrollSize property that I dont understand, not the images. Sorry for the confusion.

Hi, I have made an OpenGL view embedded into a scrollview. I am trying to use SetScrollSizes function to set a proper Window size, but I dont understand how the values are found, I have many rows of rectangles shown in OpenGL, and I want to adjust the length of the scrollbar to accomodate the number of rows. I have used the following code SetScrollSizes( MM_TEXT, CSize( 100, totalNumOfRow*60 ) ); where 60 is the length of one rectangle showing on the screen. Any help would be greatly appreciated.

Hi, I have an application that I have embedded an OpenGL scene into a CScrollView, the problem I am having is when I move the scroll bar, the OpenGL Scene doesnt move with it. What am I missing to cause the scene to move with the scroll bar movements. I think I am missing an openGL call that links the windows scrollbar position to the OpenGL Position. Any help would be greatly appreciated. Thanks in advance!

Do you by any chance have like a mock example? Thanks for the help

Hi Mark, I still want the splitters, but I want say 3 splitters in 1 tab and 2 splitters in another.

Hi, I have a SDI application that I wrote in .NET 2005 C++ and in unmanaged code, I have used the ST_SplitterWnd to split the windows, but now what I need to do is, I need to create tabs so that all the views are contained in one, so that I can make another instance of tabs when the next tab is clicked. Now I have no clue how to do this. Is there anyone else out there that knows how to do this? Thanks in advance

Hi, I have used the picture box to draw an image on the screen. Its loading perfectly, now I want to draw over some parts of the image, with rectangles and lines. I tried to draw on the picture box by doing the following but nothing shows up? How can I go about doing this. Graphics g = pictureBox1.CreateGraphics(); SolidBrush solidBrush = new SolidBrush(Color.Blue); g.FillRectangle(solidBrush, 0, 0, 100, 100); Any help would be greatly appreciated

Hi, I want to able to have tabs with different CView classes in each tab, how is this done? Is there any tutorials or sample code to do this? Thanks in advance!

The issue that I am getting, is the following: When I run the setup program, I get the error: The windows installer service cannot update the system file C:\Windows\system32\msvcrt.dll because the file is protected by Windows.... What do I have to do in the setup program to stop thins error from coming up? Thanks for all the help

Hi, I want to stop a dll from installing if it is already there, I have .NET 2005, do I have to do something in the conditions side. If so what do I need to put there to stop it, and how do I go about making a condition. Thanks in advance

I actually didnt write this software, but it happens I think when it is creating a report, so it has something to do with a database, or something along the line of that.

Hi, I am having this error come up when I am running some software that was written in Visual C++ 6.0. I searched online and everyone says to install MDAC and the problem will dissappear, but I am still experiencing it. Does anyone know what else I need to do to fix this problem Thanks

Hi, I saw this from my searching online, but the problem is none of this makes sense to me. Is there a step by step procedure to solve this problem. Thanks

Hi, I need an algorithm that fits an ellipse to x, y points. I looked around online but there is nothing written in C++. Even a methodology to achieve a fit will be good enough and I will be able to write the code. I also have the center position and all the raw data points. I need a best fit ellipse to it. Any help would be greatly appreicated. Thanks

the error I get is as follows: The following exception has occurred: InvalidCastException: Specified cast is not valid. Does that help? If not I can put up all the code

Thanks for the response, so how does this work? The function that I am using has the following prototype public override StandardValuesCollection GetStandardValues( ITypeDescriptorContext context ) { // daq is the array of string in the Usercontrol class return new StandardValuesCollection( ((UserControl1) context.Instance).daq ); } This code crashes, so I am clearly doing it wrong. Whats the correct method. Thanks for all the help

Hi, I am developing a windows control library in C# and I have to display the serial number of some cards that are connected to the system. I have written the code in the windows control library class that retieves all the data. Now inorder to make it show properly in the properties box in Visual Studio when I am using the control I had to write another class that is a TypeConverter namely StringConverter. so how does one take the serialnumber array which is just a string array in the windos control library class and give it to the StringConverter class? Any help would be greatly appreciated Thanks in advance

Thanks for the help, I have linked it all up and it works!! One more question is if I have an array with serial numbers in the Windows Control Library class, how do I send it over to the StringConverter class. So in: public class UserControl1 : System.Windows.Forms.UserControl { ... public string daqSerial = new string[10]; private string testProperty; ... public void RetrieveSerials() { ... // find all the serials connected to comp } [DescriptionAttribute("Serial"), CategoryAttribute("Global Settings"), TypeConverter(typeof(testingPropertyConverter))] public string TestProp { get { return testProperty; } set { testProperty = value; } } } public class testingPropertyConverter : StringConverter { public override bool GetStandardValuesSupported( ITypeDescriptorContext context ) { return true; } public override StandardValuesCollection GetStandardValues( ITypeDescriptorContext context ) { return new StandardValuesCollection(new string[]{"test0", "test1", "test2"}); } } So instead of putting those fixed values how do I show the daqSerial Array. Any help would be greatly appreciated