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

Steve Adeff adeffs at gmail.com
Tue Jan 10 00:04:52 UTC 2006


On Monday 09 January 2006 17:31, Curtis Stanford wrote:
> On Jan 9, 2006, at 3:21 PM, Steve Adeff wrote:
> > On Monday 09 January 2006 16:58, Curtis Stanford wrote:
> >> 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
> >
> > weird, I've got an nvidia card. I'm using top and showing that
> > mythfrontend+Xorg ~70-98% cpu usage for live and recorded 1080i
> > playback, it
> > could be that my output is 1280x720 since nvidia can't do
> > interlaced output
> > over DVI. Its much lower for 720p playback. I bet thats it,
> > resizing...
> >
> > --
> > Steve
>
> Yes, my TV only does 720p.

strange, I don't know. what version nvidia driver? what xorg version?
maybe its that I'm running Debian64?

any others with Athlon64 3x00+ care to chime in?

-- 
Steve


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