$ mencoder -v
MEncoder dev-CVS-051220-04:08-4.0.1 (C) 2000-2005 MPlayer Team
CPU: Advanced Micro Devices Athlon Thunderbird (Family: 6, Stepping: 4)
CPUflags: Type: 6 MMX: 1 MMX2: 1 3DNow: 1 3DNow2: 1 SSE: 0 SSE2: 0
Compiled with runtime CPU detection - WARNING - this is not optimal!
To get best performance, recompile MPlayer with --disable-runtime-cpudetection.
89 audio & 203 video codecs
No file given

Exiting... (error parsing cmdline)