video rendering..

Hi folks,

I am kinda..in dire straits.. with my problem...

I am in need of making an app that does both rendering and processing of
frames from the embedded camera; both in real time. Has any one done this..?
I am using the directshow apis documented. But I keep getting an error numbe
r
of 262782, when I call render stream. I am using iCaptureGraphBuilder2
interface. The documentation says that this interface is intelligent enough
to use a smart tee filter if the video capture filter's out put pin does not
have a rendering pin. But in the it does not seem to work and I keep getting
the error. I also tried to manually add a filter of type
CLSID_iVideoRenderer, with no success.  I am not even able to preview the
video, capturing the frames and doing processing on them.. seems too far at
this moment. ..

Please help.