DirectShow Filter Audio and Video

[stringtime]

Hi!.

First:
The Filter should accept Video on InputPin0 and has it's corresponding Output Pin.Same for Audio
+------------------------------------------------+
| Input Video Output Video RGb32 |
| Input Audio Output Audio PCM44.1 |
+------------------------------------------------+

I Want to have access to the samples for Video and Audio to do smth with both. eq. show an overlay oscillograph on the video
I'm wondering that this logical simple task is really so complicated.

for eq. Transform for InputVideo.
-> visualize and mix the last Audio Sample stored in the Filter

Does anybody have a simple solution which works with just derived CBaseFilter, CBaseInputPin, CBaseOutputPin? ( DShowBaseClasses)

thx stringtime