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I tested the webcams with GraphEdit. The filter graph is like this:
Webcam 1 -> AVI Decompressor -> Video Renderer

Webcam 2 -> AVI Decompressor -> Video Renderer

Webcam 3 -> AVI Decompressor -> Video Renderer

In some case(with the old webcams) it works; somtimes(when the new microsoft webcam not as the first being captured device) it says:
"This graph can't play. A device attached to the system is not functioning. (Return code: 0x8007001f)"

So does that mean the problem is of the device? Or did made a wrong filter graph under GraphEdit?

Hello experts,

I currentlly get an error called like topic says.
My project is a webcam controller for multiple webcams. I wrote it under winXP, Visual Studio 2010 C++ Express, WinForm Application.
But I think it's similar to c# and I thought more of you code such program under c#,
so I'd also like the c# experts to see it and do me a favour.

It works well with the old 3 logitech webcams. But when I added a fourth Microsoft lifcam HD5000. It shows me en error to connect this new one.
The error is after this code line:
hr = test2.pMC->Run();

*pMC points to the IMediaControl. The test2 is object 2 of my CamShow Class, for capturing the videostream.
The return value of hr is -2147024865. I'd like say that to be an unkown error.
But after several tries on different PCs, the return values is always this.

The same error has also happened when I run the release in win7 PC.

I post the way how I capture the video steams in the buttom. It's a little long, I hope you have patient and time to see it. Otherwise if you have question on me, I'm very glad to answer.
It will be such a benefitIf if you have also seen the same error before and know the solution. Or if you are glad to help to see the reason, I'll be thankful! I really need your help!

#include <DShow.h>
#include <Windows.h>
#define SAFE_RELEASE(x) {if (x) x->Release(); x=NULL;}

class CamShow
	public: CamShow(); 

	public:	// methods
		HRESULT	InitComLib();
		HRESULT	CaptureVideo(int);
		HRESULT	FindCaptureDevice(IBaseFilter **ppSrcFilter, int);

                HRESULT GetInterfaces();
                HRESULT	Stop();
                void    CloseInterfaces(void);
                void    ControlRelease();
                void    EventRelease();
                void    GraphBuilderRelease();
                void    CoUnini();

            HRESULT                     hr;
            IGraphBuilder               *pGraphBuilder;
            ICaptureGraphBuilder        *pCGB;
            ICaptureGraphBuilder2       *pCGB2;
            IVideoWindow                *pVW;

            IMediaControl               *pMC;
            IMediaEventEx               *pME;

            HWND                        ghApp;
            DWORD                       g_dwGraphRegister;

#include "stdafx.h"
#include "CamShow.h"

    {       hr                          = NULL;
            pGraphBuilder               = NULL;
            pCGB                        = NULL;
            pCGB2                       = NULL;
            pVW                         = NULL;

            pMC                         = NULL;
            pME                         = NULL;

            ghApp                       = 0;
            g_dwGraphRegister           = 0;

    CamShow::~CamShow() {}

    HRESULT CamShow::InitComLib()
        hr = CoInitialize(NULL);
        return hr;

    HRESULT CamShow::CaptureVideo(int NO)
	IBaseFilter *pSrcFilter	= NULL;
	IBaseFilter *pSampleGrabberFilter = NULL;

        hr = pCGB2->SetFiltergraph(pGraphBuilder);
        if (FAILED(hr))
        MessageBox(NULL,TEXT("Set FilterGraph error!"), NULL, MB_OK | MB_ICONINFORMATION);
            return hr;

        hr = FindCaptureDevice(&pSrcFilter, NO);
        if (FAILED(hr))
            return hr;
        hr = pGraphBuilder->AddFilter(pSrcFilter, L"Capture Filter");
        if (FAILED(hr))
            MessageBox(NULL, TEXT("AddFilter error! \r\n"), NULL, MB_OK | MB_ICONINFORMATION);
            return hr;
        hr = pCGB2->RenderStream (&PIN_CATEGORY_PREVIEW, &MEDIATYPE_Video,
                                       pSrcFilter, NULL, NULL);
        if (FAILED(hr))
            MessageBox(NULL, TEXT("Rendering stream error!"), NULL, MB_OK | MB_ICONINFORMATION);
            return hr;

        return S_OK;

    HRESULT CamShow::FindCaptureDevice(IBaseFilter ** ppSrcFilter, int NO)
	 HRESULT	hr = S_OK;
	 IBaseFilter *pSrc	= NULL;
	 IMoniker *pMoniker	= NULL;
	 ULONG cFetched;
	 int	DevNO = 0;

         IEnumMoniker *pClassEnum = NULL;
	 ICreateDevEnum *pDevEnum = NULL;

	 if (!ppSrcFilter)
	     return E_POINTER; 		
	 hr = CoCreateInstance (CLSID_SystemDeviceEnum, NULL, CLSCTX_INPROC,
				IID_ICreateDevEnum, (void **) &pDevEnum);
	 if (FAILED(hr))
	 MessageBox(NULL,TEXT("system enumerator not able to be created!"), NULL, MB_OK | MB_ICONINFORMATION);
	if (SUCCEEDED(hr))
	 hr = pDevEnum->CreateClassEnumerator (CLSID_VideoInputDeviceCategory, 
                                               &pClassEnum, 0);
	 if (FAILED(hr))
	 MessageBox(NULL, TEXT("class enum can't be created! hr=0x%x"), NULL, MB_OK | MB_ICONINFORMATION);
        if (SUCCEEDED(hr))
            if (pClassEnum == NULL)
            MessageBox(ghApp,TEXT("No usable webcams!\r\n\r\n"),
                    TEXT(""), MB_OK | MB_ICONINFORMATION);
                hr = E_FAIL;

        while (pClassEnum->Next(1, &pMoniker, &cFetched) == S_OK)

            if (DevNO==NO)
            hr = pMoniker->BindToObject(0, 0, IID_IBaseFilter, (void **)&pSrc);
            if (FAILED(hr))
              return hr;


        // Copy the found filter pointer to the output parameter.
        if (SUCCEEDED(hr))
            *ppSrcFilter = pSrc;

        return hr;

     HRESULT CamShow::GetInterfaces()
        // Create the filter graph
        hr = CoCreateInstance (CLSID_FilterGraph, NULL, CLSCTX_INPROC,
                               IID_IGraphBuilder, (void **) &pGraphBuilder);
        if (FAILED(hr))
            return hr;

        // Create the capture graph builder
        hr = CoCreateInstance (CLSID_CaptureGraphBuilder2 , NULL, CLSCTX_INPROC,
                               IID_ICaptureGraphBuilder2, (void **) &pCGB2);
        if (FAILED(hr))
            return hr;

        // Obtain interfaces for media Control and Video Window
        hr = pGraphBuilder->QueryInterface(IID_IMediaControl,(LPVOID *) &pMC);
        if (FAILED(hr))
        return hr;

        hr = pGraphBuilder->QueryInterface(IID_IVideoWindow, (LPVOID *) &pVW);
        if (FAILED(hr))
        return hr;

        hr = pGraphBuilder->QueryInterface(IID_IMediaEvent, (LPVOID *) &pME);
        if (FAILED(hr))
        return hr;

        return hr;
    HRESULT CamShow::Stop()
        if (pMC!=NULL)
        hr = pMC->Stop();
        return hr;

    void CamShow::CloseInterfaces()
        // stop previewing data
        if (pMC)

        // stop receiving events
        if (pME)
            pME->SetNotifyWindow(NULL, WM_GRAPHNOTIFY, 0);

        // Relinquish ownership (IMPORTANT!) of the video window.
        // Failing to call put_Owner can lead to assert failures within
        // the video renderer, as it still assumes that it has a valid
        // parent window. 
        if (pVW)


    void CamShow::ControlRelease()
    void CamShow::EventRelease()
    {   pME->Release();
    void CamShow::GraphBuilderRelease()
    {   pGraphBuilder->Release();

    void CamShow::CoUnini()

#pragma once

#include "CamShow.h"
#include "GlobalVar.h"

CamShow test1;
CamShow test2;
CamShow test3;

namespace My3Cam {

    using namespace System;
    using namespace System::ComponentModel;
    using namespace System::Collections;
    using namespace System::Windows::Forms;
    using namespace System::Data;
    using namespace System::Drawing;
    public ref class Form1 : public System::Windows::Forms::Form
            if (components)
                delete components;
    private: System::Windows::Forms::PictureBox^  pictureBox1;
    private: System::Windows::Forms::PictureBox^  pictureBox2;
    private: System::Windows::Forms::PictureBox^  pictureBox3;
    private: System::Windows::Forms::Button^  button1;
    private: System::Windows::Forms::Button^  button2;

             System::ComponentModel::Container ^components;

    private: static HRESULT hr = NULL;
    ......(Windows Form Designer generated code) 

Click "Connect"
private: System::Void button1_Click(System::Object^  sender, System::EventArgs^  e) {


                 hr = test1.InitComLib();
                 hr = test1.GetInterfaces();
                 hr = test1.CaptureVideo(2);

                 System::Drawing::Rectangle rc = pictureBox1->ClientRectangle;
                 hr = test1.pVW->put_Owner(OAHWND(this->pictureBox1->Handle.ToInt64()));
                 hr = test1.pVW->put_WindowStyle( WS_CHILD | WS_CLIPSIBLINGS | WS_CLIPCHILDREN );
                 hr = test1.pVW->SetWindowPosition( 0, 0, rc.Right, rc.Bottom );
                 hr = test1.pMC->Run();


                 hr = test2.InitComLib();
                 hr = test2.GetInterfaces();
                 hr= test2.CaptureVideo(1);

                 System::Drawing::Rectangle rc2 = pictureBox2->ClientRectangle;
                 hr = test2.pVW->put_Owner(OAHWND(this->pictureBox2->Handle.ToInt64()));
                 hr = test2.pVW->put_WindowStyle( WS_CHILD | WS_CLIPSIBLINGS | WS_CLIPCHILDREN );
                 hr = test2.pVW->SetWindowPosition( 0, 0, rc2.Right, rc2.Bottom );
                 hr = test2.pMC->Run();


                 hr = test3.InitComLib();
                 hr = test3.GetInterfaces();
                 hr= test3.CaptureVideo(3);

                 System::Drawing::Rectangle rc3 = pictureBox3->ClientRectangle;
                 hr = test3.pVW->put_Owner(OAHWND(this->pictureBox3->Handle.ToInt64()));
                 hr = test3.pVW->put_WindowStyle( WS_CHILD | WS_CLIPSIBLINGS | WS_CLIPCHILDREN );
                 hr = test3.pVW->SetWindowPosition( 0, 0, rc3.Right, rc3.Bottom );
                 hr = test3.pMC->Run();



Acturally I used three comboBoxes in my original program to read all video devices on PC, and to choose one for each pictureBox. Here I've simplified that, but it is enough to show the error. And as I tested, it runs without code error.
Just the pictureBox, which has hr = -214724865 after pMC->Run(), shows black image.

If you want to change the turns of webcams in each pictureBoxes, just change the value in the three clips:
hr = test1.CaptureVideo(2);
hr = test2.CaptureVideo(1);
hr = test3.CaptureVideo(3);

it can be 1 to n, n is the number of all devices. For example, there are 6 webcams,
then you can choose the 1, 5, 4 to capture.

Click "Disconnect"
private: System::Void button2_Click_1(System::Object^  sender, System::EventArgs^  e) {
             btnConnect->Enabled = true;
             btnDisconnect->Enabled = false;
Updated 14-Dec-12 4:10am
Jibesh 12-Dec-12 18:27pm    
Check pMC has a valid instance before Execute Run method

// Obtain interfaces for media Control and Video Window
hr = pGraphBuilder->QueryInterface(IID_IMediaControl,(LPVOID *) &pMC);
if (FAILED(hr))
return hr;
or probably some hardware issue with your media control.
christmars 13-Dec-12 3:27am    
I used your suggestion to check pMC value before the Run(),
and I the quering IMediaControl value for the forth webcam is only going to work with one value "0x003F751C"(as the first capturing device). When I make it for test2 or test3, it has also a value that seems to be "valid".

Could you please tell me what do you mean with "valid instance"?

1 solution

Not an answer, but the error description from various systems, so it is definitely not an unknown error:

C:\DevTools>err 0x8007001f
# as an HRESULT: Severity: FAILURE (1), Facility: 0x7, Code 0x1f
# for hex 0x1f / decimal 31 :
  BTH_ERROR_UNSPECIFIED_ERROR                                   bthdef.h
  SHARED_RESOURCE_CONV_ERROR                                    bugcodes.h
# SCEP Add-on cannot submit certificate request.
# ICertRequest::Submit failed (%2).  %3  Please find support
# information at http://%1/certsrv/mscep/mscephlp.htm.
# Certificate Services did not start: The chain of
# Certification Authority certificates is not properly
# configured.
  CR_INVALID_DATA                                               cfgmgr32.h
  IAAPI_BADOBJ                                                  iaapi.h
# /* Object can not be marked */
  KRB_AP_ERR_BAD_INTEGRITY                                      kerberr.h
# Integrity check on decrypted field failed
  POLICY_ERRV_SUBNET_USER_PEAK_RATE                             lpmapi.h
  MAPI_DIAG_RENDITION_UNSUPPORTED                               mapidefs.h
  NMERR_NO_PROPERTY_DATABASE                                    netmon.h
  OLE_ERROR_NEW,                                                ole.h
# Server failed to create new doc         */
  SE_ERR_NOASSOC                                                shellapi.h
# The time service discovered that the system time zone
# information was
# corrupted. Because many system components require valid
# time zone
# information, the time service has reset the system time
# zone to GMT.
# Use the Date/Time control panel to set the correct time
# zone.
  ERROR_GEN_FAILURE                                             winerror.h
# A device attached to the system is not functioning.
# 14 matches found for "0x8007001f"
Share this answer
christmars 13-Dec-12 3:32am    
Thank you for the message! According to the error description, it is possible that the device attached to the system is not funtioning.

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