[mythtv-users] Re: minimalist hardware for mythtv backend using
PVR-350 or PVR-250?
aplumb at gmail.com
Wed Oct 13 00:18:12 UTC 2004
On Tue, 12 Oct 2004 15:04:23 -0700, Yan-Fa Li <yanfali at best.com> wrote:
> If you get it to work, more power too you. It's also not an 686 class
> CPU. Last time I checked the optimal CPU configuration for it under
> Linux kernel was a 586/pentium. This thing probably only supports MMX
> at best, or possibly 3DNOW which means transcoding will be a nightmare.
> One nice thing about having CPU to burn for the backend is you can use
> it to transcode in the background, or commercial skip.
Thanks for the heads-up. It's been a while since I powered up the
board; couldn't remember if it was i586 or i686, but it did run
Knoppix right off the CD. :-)
> Also, remember if it only supports UDMA33 the PCI bus will be tied for
> up 3 times as long as UDMA100 which might cause some unpredictable
> behavior with your other PCI cards. When you get it up and running, try
> hdparm -tT /dev/hda
> and post the numbers.
Will do. My intent is to have the PVR-350 as the one-and-only card,
so it shouldn't be an issue.
> I'd be willing to bet they are very low. For
> mpeg2 you only need to support 1MB/s max writes. So your PCI bus
> shouldn't have to transfer more than 2-4MB/s. PCI32/33 can support
> 45-90MB/s comfortably. Of course if you want VGA and Audio support on
> top of that, you might be asking a little much of the little fella. Let
> us know how it works out.
The X-board itself has audio, video (VGA and/or TV), ethernet, USB
already, so "all" that's needed is the interface circuitry off the
200-pin SODIMM connector. What I'm aiming for is a backend-only
system whose only purpose is to capture A/V directly to disk, in the
case of a PVR-350 play it back, and serve up the recordings as-is via
network. Everything else is icing...
Ah yes, I want to squeeze it all into a 5-1/4" footprint so I can
mount it in a CDROM drive bay. ;-) That may be a bit of a stretch,
so I'm willing to put the X-board+PVR-x50 in the 5-1/4" bay with an
external IDE connector to an HD mounted elsewhere... Or I just might
skip the IDE interface all together and take advantage of the USB
interface so drives are hot-swappable...
First things first. :-)
If you don't know what to do, do something.
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