private bool IsVideoHaveAudio(Control hWin, string FileName)
{
int hr = 0;
// Get the graphbuilder object
IFilterGraph2 m_FilterGraph = new FilterGraph() as IFilterGraph2;
// Get a ICaptureGraphBuilder2 to help build the graph
ICaptureGraphBuilder2 icgb2 = new CaptureGraphBuilder2() as ICaptureGraphBuilder2;
try
{
// Link the ICaptureGraphBuilder2 to the IFilterGraph2
hr = icgb2.SetFiltergraph(m_FilterGraph);
DsError.ThrowExceptionForHR(hr);
//#if DEBUG
// // Allows you to view the graph with GraphEdit File/Connect
// m_DsRot = new DsROTEntry(m_FilterGraph);
//#endif
// Add the filters necessary to render the file. This function will
// work with a number of different file types.
IBaseFilter sourceFilter = null;
hr = m_FilterGraph.AddSourceFilter(FileName, FileName, out sourceFilter);
DsError.ThrowExceptionForHR(hr);
// Get the SampleGrabber interface
ISampleGrabber m_sampGrabber = (ISampleGrabber) new SampleGrabber();
IBaseFilter baseGrabFlt = (IBaseFilter)m_sampGrabber;
// Configure the Sample Grabber
ConfigureSampleGrabber(m_sampGrabber);
// Add it to the filter
hr = m_FilterGraph.AddFilter(baseGrabFlt, "Ds.NET Grabber");
DsError.ThrowExceptionForHR(hr);
// Connect the pieces together, use the default renderer
hr = icgb2.RenderStream(null, null, sourceFilter, baseGrabFlt, null);
DsError.ThrowExceptionForHR(hr);
// Now that the graph is built, read the dimensions of the bitmaps we'll be getting
SaveSizeInfo(m_sampGrabber);
// Configure the Video Window
IVideoWindow m_videoWindow = m_FilterGraph as IVideoWindow;
ConfigureVideoWindow(m_videoWindow, hWin);
// Grab some other interfaces
IMediaEvent m_mediaEvent = m_FilterGraph as IMediaEvent;
IMediaControl m_mediaCtrl = m_FilterGraph as IMediaControl;
IMediaSeeking m_mediaSeeking = m_FilterGraph as IMediaSeeking;
try
{
IBaseFilter pAudioRenderer = (IBaseFilter) new DSoundRender();
hr = m_FilterGraph.AddFilter(pAudioRenderer, "Audio Renderer");
DsError.ThrowExceptionForHR(hr);
hr = icgb2.RenderStream(null, MediaType.Audio, sourceFilter, null, pAudioRenderer);
// DsError.ThrowExceptionForHR(hr);
// hr = m_mediaSeeking.SetRate(0.5);
}
catch
{
}
}
finally
{
if (icgb2 != null)
{
Marshal.ReleaseComObject(icgb2);
icgb2 = null;
}
}
#if DEBUG
// Double check to make sure we aren't releasing something
// important.
GC.Collect();
GC.WaitForPendingFinalizers();
#endif
CloseInterfaces();
return(hr == 0);
}
