Ow now I see what's so funny about my post :D
I knew this question was asked here before and that time there was no answer.
Some time ago I accidently stumbled upon this feature in ffdshow, so this time I thought I better answer the question.
I didn't search the forum anymore : that's a task for the topic starter
So the next time someone searches the forum: he/she should definately find the answer.
Just remember folks : You saw it first with J7N !