[mythtv-users] Re: pcHDTV and HDTV

[Jason Schloer]

My bad Isaac, I thought there was still more to do with it aside from
the OSD stuff. Is it something that will scale upwards better, i.e. it
uses 30% cpu on PVR-x50(5 mbps) files, but will also use 30% cpu on a
pchdtv(19.2 mbps) file, whereas a software decoder would jump up to
maybe 90%? Or is it a matter of the TI cards only supporting some of the
features whereas the MX cards support the full set? Or does xvmc just
suck?


Jason Schloer


-----Original Message-----
From: mythtv-users-bounces at mythtv.org
[mailto:mythtv-users-bounces at mythtv.org] On Behalf Of Isaac Richards
Sent: Wednesday, August 27, 2003 1:29 PM
To: Discussion about mythtv
Subject: Re: [mythtv-users] Re: pcHDTV and HDTV

On Wednesday 27 August 2003 12:44 pm, Jason Schloer wrote:
> I may be wrong on this, but for capture you shouldn't need too
powerful
> a machine. Since ATSC signals are already MPEG2 compressed to at most
> 19.2 mbps there's not a lot to do other than write the stream to disk.
> So throughput will be the bigger issue for multiple hdtv cards. Where
> you will need more horsepower is on the machines displaying the
stream.
> And once Myth is optimized for xvmc, even a 1.2 Ghz machine should be
> enough. Anyway, I gues my point is that dual cpu Athlon-64  may be a
bit
> of overkill, especially if the "normal" cards you're considering are
> hardware encoders. I'd love to hear other peoples take on this though,
> especially Brandon.

The xvmc stuff in CVS (and the last release) works fine.  Of course, it
uses 
_more_ cpu than software decoding on my gf4.

Isaac
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