[mythtv-users] Fwd: Sempron 3100 lag when viewing HD from 6200 STB

Curtis Stanford curtis at stanfordcomputing.com
Mon Jan 9 21:58:04 UTC 2006


On Jan 9, 2006, at 2:49 PM, Steve Adeff wrote:

> On Monday 09 January 2006 16:35, Kevin Kuphal wrote:
>> Adam Propeck wrote:
>>> Here is some more detail. ( Xrog.conf and some hdparm info) I'm
>>> wondering if livetv isn't playing well because of the specific
>>> firewire port/driver? I'm using the single port that comes with the
>>> audigy 2 PCI card I'm using. Also, I guess I was wondering if I need
>>> to do anything specific with the fact that I'm using an Nforce 3
>>> motherboard. Any tweaks that are recommended? Thanks, -Adam
>>
>> I think the problem is that fundamentally, the ATI driver does not
>> provide hardware accelerated MPEG-2 playback and your Sempron cannot
>> handle the software decoding without choking.  If you had an  
>> Nvidia card
>> that supported XvMC you could enable that which would activate the
>> hardware decoding and probably give you the performance you expect.
>>
>> Kevin
>
> I'm going to have to agree, unless someone else is running a  
> Sempron 3100 and
> able to do live HDTV I'm going to have to think this is the case. I  
> know my
> Athlon64 3200+ has no room to spare playing live HD, I can easily  
> imagine a
> Sempron of lower clock speed having more trouble.
> LiveTV requires a bit more resources from mythbackend and  
> mythfrontend from
> what I've noticed.
>
> -- 
> Steve

That seems like a lot of power! I'm decoding HD (live and recorded)  
on an old 2.4G Pentium4. Using the nvidia driver without XVMC I'm  
seeing about 50% CPU usage. An Athlon64 3200+ should kick my butt. Or  
is it an ATI problem??

Curtis


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