I'm planning to convert my current p3 1 Ghz standard definition backend into a firewire/hd backend (ATSC) and I just want to make sure my thinking is correct. I don't want to convert this and then find out I was off by a factor of 10 and my PCI bus is saturated.
1. Firewire & OTA streams come in at a max bitrate of 19.3 Mb or ~2.4 MB per second 2. Without gigabit ethernet, I can connect at max 4 frontends 3. With multiple frontends I'm probably better off throwing a RAID in the machine as well to maximize disk speed. 4. Even with 4 streams coming in, 4 streams going out, and a hardware RAID on the same PCI bus I'm not even close to maxing out the PCI bus because I'm streaming in at ~10MB/sec, writing ~10 MB/sec to disk, reading ~10MB/sec from disk, and writing ~10MB/sec to ethernet leaving me with ~93 MB/sec still available on the bus and nothing to worry about. 5. Because the ATSC streams arrive pre-compressed in MPEG2, my system will have no problem handling 4 of them since there is very little processing going on Am I missing anything major here before I start? Also, if anyone has Time Warner with a 3250, does the TW OSD show up in the video from the firewire port? Can you set the output format (say, send every chanel at 480p)? Thanks to everyone for the great system. --Pat Long time listener, first time caller.
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