[mythtv-users] unable to play MPEG recordings

nate s nate.strickland at gmail.com
Sat Dec 18 01:38:19 UTC 2004


I thought that AMD's MMX was 3dnow?  Mplayer also has a 3dnow flag...


On Tue, 26 Oct 2004 10:56:01 -0400, Joseph A. Caputo
<jcaputo1 at comcast.net> wrote:
> On Tuesday 26 October 2004 08:50, Paul Andreassen wrote:
> > On Tue, 2004-10-26 at 01:25, Joseph A. Caputo wrote:
> > > On Sunday 24 October 2004 12:30, Alan Murrell wrote:
> > > > root at pvr:~ # mplayer /myth/video/X-Men\:\ Evolution\:\ Fun\ and\
> > > > Games\ \[09-18\].mpeg
> > > > MPlayer 0.92-3.3.2  (C) 2000-2003 MPlayer Team
> > > > CPU: Advanced Micro Devices Duron SF Spitfire (Family: 6,
> > > > Stepping: 1) Detected cache-line size is 64 bytes
> > > > CPUflags:  MMX: 1 MMX2: 1 3DNow: 1 3DNow2: 1 SSE: 0 SSE2: 0
> > > > Compiled for x86 CPU with extensions: MMX MMX2 3DNow 3DNowEx SSE
> > >
> > > I think you're almost right -- you have a Duron, which *is* an x86
> > > CPU ("x86" refers to the processor architecture, not the actual
> > > model or manufacturer).  The problem seems to be that mplayer was
> > > compiled for SSE support, which only Durons with the Morgan core
> > > (1GHz - 1.5GHz) have.  You most likely have a Duron Spitfire
> > > (600MHz - 950MHz).  You could still use an AMD chip, but it would
> > > have to be at least a Duron (Morgan) or Athlon XP (any chip that
> > > supports 3DNow! Professional, which is the same as SSE).  Also, any
> > > Intel processor from the Celeron/ P-III on up.
> >
> > Could you please explain what mmx2 is?  I did a google and thought it
> > was the previous name for sse.  If it is, why does mplayer actual
> > list it?  My Pentium 4 doesn't support mmx2.
> >
> > flags         : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca
> > cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm
> 
> Hmmm... I'm relying on Google here, too, and it seems as though there
> are conflicting definitions of "MMX2".  In its first incarnation, MMX2
> was simply SSE.  However, I think that name was probably only used
> during the development process, hence there has never been an actual
> SSE-enabled processor that advertised MMX2.
> 
> The MMX2 that shows up in the mplayer output is likely AMD's extension
> to MMX, introduced in the Athlon in 1999.  This would explain why your
> Pentium 4 doesn't have it.
> 
> See here for more info:
> 
> http://softpixel.com/~cwright/programming/simd/mmx.2.php
> 
> -JAC
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