DSPack: how to connect PushSource to videocap?

Question

I want to use PushSource filter to capture but I need to "connect" it to "videocap" sample. This filter is not a standalone filter, so it can't be enumerated as capture device, also I dont want it to convert like that

Answer 1

Well, I use Nvidia Encoder Filter that does not show up in GraphEdit. To do that I just define the GUID:

Const
CLSID_NVIDIA_VideoEncoderFilter : TGUID = '{B63E31D0-87B5-477f-B224-4A35B6BECED6}';

Then I create the filter in memory like that:

Var
  N: IBaseFilter;
begin
  CoCreateInstance(CLSID_NVIDIA_VideoEncoderFilter, Nil, CLSCTX_INPROC_SERVER, IID_IBaseFilter, N);
  if Assigned(N) then
  Begin
  // connect to any filter that you can use in your system
  End;

Also you can see this "hidden" filter in your GraphEdit now.

Edit: Here is the code that I link filters. It searches for every pin that may be connected to the next filter. This code connects audio out pins to audio in pins and video out pins to video in pins etc. It is very flexible.

Procedure Connect(Builder: IGraphBuilder; SourceFilter, DestFilter: IBaseFilter);
Var
  SourceEnum, DestEnum: IEnumPins;
  SourcePin, DestPin: IPin;
  FI: _FilterInfo;
  S, D: String;
Begin
  SourceFilter.QueryFilterInfo(FI);
  S := FI.achName;
  DestFilter.QueryFilterInfo(FI);
  D := FI.achName;
  SourceFilter.EnumPins(SourceEnum);
  DestFilter.EnumPins(DestEnum);
  DestEnum.Reset;
  While DestEnum.Next(1, DestPin, Nil) = S_OK Do
  Begin
    SourceEnum.Reset;
    While SourceEnum.Next(1, SourcePin, Nil) = S_OK Do
      If Builder.Connect(SourcePin, DestPin) = S_OK Then
      Begin
        SourceEnum := Nil;
        DestEnum := Nil;
        SourcePin := Nil;
        DestPin := Nil;
        Exit;
      End;
  End;
  SourceEnum := Nil;
  DestEnum := Nil;
  SourcePin := Nil;
  DestPin := Nil;
  Raise Exception.Create(Format('There is no pin from %s to connect to %d', [S, D]));
End;

Now you can use this method with your filters as in the following code

Var
  SourceFilter, DestFilter: IBaseFilter;
  Builder: IGraphBuilder;
Begin
  SourceFilter := SrcFilter As IBaseFilter;
  DestFilter := DstFilter As IBaseFilter;
  Builder := FilterGraph As IGraphBuilder;
  Connect(Builder, SourceFilter, DestFilter);
End;

Hope this helps. We were all newbies once ;)