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

[Steve Adeff]

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