[mythtv-users] unable to play MPEG recordings

[Joseph A. Caputo]

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