detect.m2v is first 4MB of a file which MPlayer's autodetect logic
	can not identify.   The file plays correctly with 'vlc' interestingly
	enough.

file detect.m2v
detect.m2v: MPEG video stream data

mplayer detect.m2v
MPlayer CVS-020422-08:04-2.95.3 (C) 2000-2002 Arpad Gereoffy (see DOCS!)

CPU vendor name: GenuineIntel  max cpuid level: 2
CPU: Intel Celeron 2/Pentium III Coppermine,Geyserville (Type: 6, Stepping: 6)
CPUflags: Type: 6 MMX: 1 MMX2: 1 3DNow: 0 3DNow2: 0 SSE: 0 SSE2: 0
Compiled with RUNTIME CPU Detection - warning, it's not optimal! To get best performance, recompile mplayer from sources with --disable-runtime-cpudetection
Reading /u/sms/.mplayer/codecs.conf: can't open '/u/sms/.mplayer/codecs.conf': No such file or directory
Reading /usr/local/share/mplayer/codecs.conf: 34 audio & 91 video codecs
font: can't open file: /u/sms/.mplayer/font/font.desc
Font /usr/local/share/mplayer/font/font.desc loaded successfully! (206 chars)
Using usleep() timing
Can't open input config file /u/sms/.mplayer/input.conf : No such file or directory
Falling back on default (hardcoded) config
Playing detect.m2v
Can't open IFO file: No such file or directory
Not an URL!
header block 1 size: 0
MPEG packet stats: p100: 458  p101: 458  PES: 0  MP3: 1103 
============= Sorry, this file format not recognized/supported ===============
=== If this file is an AVI, ASF or MPEG stream, please contact the author! ===

*** free_stream() called ***

Exiting... (End of file)