IP Camera Directshow Filter

  IP Camera Directshow Filter

How to use the IP Camera Directshow Filter

This article is intended to show you how to use the IP Camera Directshow Filters in a simple application with default parameters.

Start by calling CoInitialize to initialize the COM library:     

HRESULT hr = CoInitialize(NULL);

Next, call CoCreateInstance to create the Filter Graph Manager.

hr = CoCreateInstance(CLSID_FilterGraph, NULL,CLSCTX_INPROC_SERVER, IID_IGraphBuilder, (void **)&pGraph);

Add the following header file.
#include <InitGuid.h>
#include "IIPCamViewerFilter.h"


call CoCreateInstance to create the IP Camera Directshow Filter

 

CComPtr _IPCamSource;
hr = CoCreateInstance(CLSID_IPCamViewerFilter, NULL, CLSCTX_INPROC_SERVER,IID_IBaseFilter,(void **)&_IPCamSource);

Setup the IP Camera Directshow Filter  parameter.

CComPtr<IFileSourceFilter> sourceFilter;
hr = CoCreateInstance(CLSID_IPCamViewerFilter, NULL, CLSCTX_INPROC_SERVER,IID_IBaseFilter,(void **)&_IPCamSource);
CComQIPtr<IPCamViewerFilter, &IID_IIPCamViewerFilter> netCamFilter(_IPCamSource);
if (!_userName.empty())
netCamFilter->setAuthentication(_userName.c_str(), _password.c_str());
else
netCamFilter->setAuthentication(NULL, NULL);
netCamFilter->setConnectionTimeout(10000);

Add the IP Camera Directshow Filter to the graph

hr = _graphBuilder->AddFilter(_IPCamSource, L"IP Cam");

Create Video Renderer and add to the graph.

hr = dsHelper.createFilter(CLSID_VideoMixingRenderer9, &_videoRenderer);
hr = _graphBuilder->AddFilter(_videoRenderer, L"Video Renderer");

 
Checking the IP Camera whether have audio stream, if it has audio stream, add Audio Renderer to the graph
 

 if (SUCCEEDED(netCamFilter->hasAudio())) {
// AudioRenderer: create renderer filter
hr = dsHelper.createFilter(CLSID_DSoundRender, &_audioRenderer);
// AudioRenderer: add renderer to graph
hr = _graphBuilder->AddFilter(_audioRenderer, L"Audio Renderer");
}

Connect IP Camera Directshow Filter to Video Renderer
 

hr = dsHelper.connectFilters(_graphBuilder, _IPCamSource, _videoRenderer);

Connect IP Camera Directshow Filter to Audio Renderer
 

if (_audioRenderer) {
hr = dsHelper.connectFilters(_graphBuilder, _IPCamSource, _audioRenderer);
}

Query the IMediaControl interface to control the streaming.
 

hr = pGraph->QueryInterface(IID_IMediaControl, (void**)&pControl);

Run the graph.
 

hr = pControl->Run();

When you close your application, close the COM library.
 

CoUninitialize();