On Sat, Mar 19, 2005 at 06:22:14PM +1100, Phill Edwards wrote: > I'm in Australia and thinking of going digital. I have 2 BT8x8 > analogue cards now which works well. I was going to replace one of > these with a digital BT8x8 card (something like a VisionPlus which > people have reported as easy to get working and good quality). Before > I do this I have some questions: > > 1) Is it OK to have 1 analogue card + 1 digital card in the same backend?
Should be fine. > 2) Do digital BT8x8 cards chew up CPU? I know the analogue ones do, > but I thought that the digital cards just wrote the incoming MPEG2 > stream straight to disk which would mean very little CPU required. Am > I right or delusional? You're right. The data just gets streamed to disk, via the CPU. > 3) Will playback of MPEG2 require more CPU than playback of my > existing MPEG4 recordings? Don't know. > 4) Will there be issues writing digital MPEG2 + analogue MPEG4 > recordings to disk simultaneously? I saw a thread about overloading > the PCI bus or something. Possibly. The analog card is streaming uncompressed video and audio so your PCI bus will have quite a bit of other activity, which the BT878-based digital cards aren't provisioned for. I'd advise you to get a newer card, which are available for about the same price. Hamish -- Hamish Moffatt VK3SB <[EMAIL PROTECTED]> <[EMAIL PROTECTED]>
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