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

Jason potuncle at enjoyingeugene.com
Wed Oct 20 02:34:43 UTC 2004

Yes, sorry. I klunked up my Roman numerals. It is a P4 and it's in a 
Pundit so it's not a HT and I don't have a GeForce, only XV via the 
on-board SIS chipset. If all else fails, I'll transcode the HDTV 
streams down to whatever the 2.4 Ghz P4 can handle. Since MythTV I 
rarely watch live TV anyways, and if I needed to, I can do so via the 


On Oct 19, 2004, at 4:51 PM, Jarod Wilson wrote:

> 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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