I am trying to build a custom graph filter and I am having problems.
I am using the C# DirectShow.NET lib
I am reading a file with vc1 video and dts audio. i add the source filter to the graph, it works fine, i can also add the splitter filter (using lav splitter), but when i try to connect the file source filter to the lav splitter, it fails.
and it fails, because it doesn't find any input pin on the splitter ... i know that output pins can be dynamic, but the input pin should be there right ?
this is the code
_graphBuilder = (IGraphBuilder)new FilterGraph();
_dsRotEntry = new DsROTEntry((IFilterGraph)_graphBuilder);
LogInfo("Adding source filter...");
int hr = _graphBuilder.AddSourceFilter(_inputFilePath, _inputFilePath,
out _fileSource);
DsError.ThrowExceptionForHR(hr);
IPin pinSourceOut = DsFindPin.ByDirection(_fileSource, PinDirection.Output, 0);
if (pinSourceOut == null)
{
LogError("Unable to find source output pin");
};
IBaseFilter lavSplitter = CreateFilter(LAV_SPLITTER);
if (lavSplitter == null)
{
LogError("LAV Splitter not found");
};
hr = _graphBuilder.AddFilter(lavSplitter, "LAV Splitter");
DsError.ThrowExceptionForHR(hr);
bool result = TryConnectToAny(pinSourceOut, lavSplitter);
if (!result)
{
LogError("Unable to connect FileSource with LAV Splitter");
}
and
private bool TryConnectToAny(IPin sourcePin, IBaseFilter destinationFilter)
{
IEnumPins pinEnum;
int hr = destinationFilter.EnumPins(out pinEnum);
DsError.ThrowExceptionForHR(hr);
IPin[] pins = { null };
while (pinEnum.Next(pins.Length, pins, IntPtr.Zero) == 0)
{
int err = _graphBuilder.Connect(sourcePin, pins[0]);
if (err == 0)
return true;
Marshal.ReleaseComObject(pins[0]);
}
return false;
}
