I know there are several forum posts and articles about this subject, but I need some help in making a correct calculation. We've got 25 incoming channels with bitrates that vary from 10 to 30 Mbps. We'll need transcoding and transrating to 3 (h.264) streams per channel, approx. 2500, 1500, 800Kbps. I don't think there's any server who can handle this on its own, but how many servers would we need and what specs?