TV stream and scrambled channels

Hello!

I've writing an application which is able to communicate with my program card/smart card provided to me by my DVB TV distributor so that I can subscribe to Pay TV channels. This application is able to query the smart card for key to descramble the TV channels I subscribe to. I do however have no connection between my "software CA-module" (as one might call it) and the TV-tuner (its a DVB-T tuner). The DVB-T tuner I have come with BDA driver so it should work fine with DirectShow. My question is however this; is it possible to access the scrambling information sent in the mpeg2 transport stream's PES packets through the DirectShow API somehow so I can send it to the smart card? And is it futhermore possible to feed the descramble key returned by the smart card back to the mpeg2 decoder so that the scrambled channels gets decoded correctly?

Thankful for all answers! Best regards
/ David Olsson
.

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