我正在使用 C#.net 中的 DirectshowLib2005.dll 从网络摄像头录制视频。我有这个代码来 startVideoRecoding,如下所示。
try
{
IBaseFilter capFilter = null;
IBaseFilter asfWriter = null;
IFileSinkFilter pTmpSink = null;
ICaptureGraphBuilder2 captureGraph = null;
GetVideoDevice();
if (availableVideoInputDevices.Count > 0)
{
//
//init capture graph
//
graphBuilder = (IFilterGraph2)new FilterGraph();
captureGraph = (ICaptureGraphBuilder2)new CaptureGraphBuilder2();
//
//sets filter object from graph
//
captureGraph.SetFiltergraph(graphBuilder);
//
//which device will use graph setting
//
graphBuilder.AddSourceFilterForMoniker(AvailableVideoInputDevices.First().Mon, null, AvailableVideoInputDevices.First().Name, out capFilter);
captureDeviceName = AvailableVideoInputDevices.First().Name;
//
//check saving path is exsist or not;if not then create
//
if (!Directory.Exists(ConstantHelper.RootDirectoryName + "\\Assets\\Video\\"))
{
Directory.CreateDirectory(ConstantHelper.RootDirectoryName + "\\Assets\\Video\\");
}
#region WMV
//
//sets output file name,and file type
//
captureGraph.SetOutputFileName(MediaSubType.Asf, ConstantHelper.RootDirectoryName + "\\Assets\\Video\\" + videoFilename + ".wmv", out asfWriter, out pTmpSink);
//
//configure which video setting is used by graph
//
IConfigAsfWriter lConfig = asfWriter as IConfigAsfWriter;
Guid asfFilter = new Guid("8C45B4C7-4AEB-4f78-A5EC-88420B9DADEF");
lConfig.ConfigureFilterUsingProfileGuid(asfFilter);
#endregion
//
//render the stram to output file using graph setting
//
captureGraph.RenderStream(null, null, capFilter, null, asfWriter);
m_mediaCtrl = graphBuilder as IMediaControl;
m_mediaCtrl.Run();
isVideoRecordingStarted = true;
VideoStarted(m_mediaCtrl, null);
}
else
{
isVideoRecordingStarted = false;
}
}
catch (Exception Ex)
{
ErrorLogging.WriteErrorLog(Ex);
}
如果你观察这行代码
//
//configure which video setting is used by graph
//
IConfigAsfWriter lConfig = asfWriter as IConfigAsfWriter;
Guid asfFilter = new Guid("8C45B4C7-4AEB-4f78-A5EC-88420B9DADEF");
lConfig.ConfigureFilterUsingProfileGuid(asfFilter);
它将应用该 GUID 上描述的视频设置,我从位于“C:\windows\WMSysPr9.prx”的文件中获取此 GUID。
所以我的问题是如何使用格式、分辨率和所有内容创建我自己的视频设置?
如何使用网络摄像头以黑白模式或灰度模式录制视频?