[mythtv-users] Performance of the HD MPEG2 decoders

[Michael Haan]

On 11/18/05, Alex Brekken <brekkal at gmail.com> wrote:
>
> Thanks for that info Todd. I'm in the process of specing out a new HD
> capable frontend, and the hardware I'm looking at is very similar to yours.
> My big question, though, was to confirm that an Athlon64 can playback HD
> content smoothly without XvmC - and from what you stated it looks like that
> answer is yes. (I assumed it could, but it seems like people generally have
> a tougher time with HD on the AMD chips vs. Intel - at least that's my
> perception)
>
>
> On 11/17/05, Robert Tsai <rtsai1111 at comcast.net> wrote:
>
> > On Thu, Nov 17, 2005 at 03:43:52PM -0800, Todd Ignasiak wrote:
> > > I have seen several reports of performance expectations with the
> > > various MPEG decoders, and what I am seeing is not exactly what
> > > other people have seen, so I wanted to start a discussion here.
> > > Also, I thought others might be interested in the performance
> > > numbers from a typical system (if anyone has performance info from
> > > other CPUs, or Unichrome XvMC, please post)..
> > >
> > > The main unexpected issues I see are:
> > > - libMPEG2 uses much more CPU than the Standard decoder on my system.
> > > (libmpeg2:80%, Standard: 50%, XvMC: 28%). The 'help' info in the
> > > GUI, and several posts here, say that libMPEG2 should be have lower
> > > CPU requirements. Perhaps this is an x86-64 issue.
> >
> > You're confirming what other people have reported on other 64-bit
> > systems (ffmpeg a.k.a. "standard" is more CPU-efficient):
> >
> > http://www.gossamer-threads.com/lists/mythtv/users/127168
> >
> > --Rob
> >
> >
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I can successfully play HD content without XvMC on my AMD64 3800+. Keeping
it both cool and quiet is another issue. In fact, I finally went to a water
cooler when the heat sink and fan couldn't cut it.
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