just shortly to let you know:
finally we used a "Canopus DV Storm2 Pro. The card m2v et m2a fournit en temps réel tandis que la capture, but no chaptering.

What we did was using Encore instead and started recording with the card and playing the time line at the same time, then set the chapters with Shift + *, ce later the chapters were already at the time line when we moved into the recorded clip. Kind of way around;)

For any reason we had to transcode m2a to ac3 encore avec (Automatic Settings) I have to find out if m2a nativement peut être utilisé pour les DVD without any problems (the storm does not support ac3 for any reason ..).

Thanks for anybody who helped us with this topic, the next month I will setup a similar system in a TV-Truck for Conferences, and next time we will use the card in Germany in February. We will do some slight improvements, mais bottom line is: very successful and flexible. Thanks!
tobi