[mythtv-users] Processor Requirements for different HDTV formats?

[Jarod Wilson]

On Tuesday 19 October 2004 09:25, Joe Barnhart wrote:
> --- Jason <potuncle at enjoyingeugene.com> wrote:
> > Also, can the PVR-350 be of any assistance in
> > decoding HDTV recordings
> > since HDTV is encoded using MPEG2 and the PVR-350
> > has a hardware MPEG2
> > decoder?
>
> Decoding in hardware is your only hope with a P3.

Jason, is that truly a 2.4GHz P3? Or did you mean P4? I don't recall such a P3 
ever being made. I think you *might* be okay w/a 2.4GHz HT-P4 and a GeForce 
FX 5200.

> I found XvMC to be too problematic to use on either
> Athlon or P4 systems.  It hangs the frontend if you
> just press the skip forward or backward button.
> Perhaps it works better with non-nVidia cards

Nope, works best w/nVidia cards. :-\

> but 
> with the nVidia 6111 driver it's just plain broken.
> The good news is that Xv works very well.  On a P4
> (530, 3GHz) it takes about 60% cpu to play a 1080i
> stream vs. 40% for XvMC, so it's not such an enormous
> difference.

So are you all good to go now, Joe?

> I have no idea if the MPEG decoder on the 
> 350 will help or not -- I'll be watching replies
> eagerly.

The 350 isn't capable of handling HDTV-sized frames. It'll be of no help, 
unless you're transcoding down to a 720x480 mpeg2, which would make recording 
in HDTV almost completely pointless, if you could even get it to work.

-- 
Jarod C. Wilson, RHCE
jcw at wilsonet.com

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