Video via sherad memory


im trying to play video via shared Memory for a multiscreen setup.

VideoIn -> VideoOut(SharedMem)
SharedMem(Texture) -> Quad -> Renderer works fine when using VH Multicam Driver witch simulates a WDM Device.

Same setup is not working using a DV Camera (AV/C Subunit Driver)

And same setup is not working using FileStream instead of VideIn.

I played with the Settings of SharedMem(Texture)
(Bytes per Pixel and Format) with no success.

Any help ould be great.
Tahnks in Advance.