bully@plutux ~ $ mplayer dvd:// -vo xv -ao alsa
MPlayer dev-SVN-rUNKNOWN-4.1.1 (C) 2000-2007 MPlayer Team
CPU: AMD Turion(tm) 64 Mobile Technology ML-37 (Family: 15, Model: 36, Stepping: 2)
CPUflags:  MMX: 1 MMX2: 1 3DNow: 1 3DNow2: 1 SSE: 1 SSE2: 1
Compiled for x86 CPU with extensions: MMX MMX2 3DNow 3DNowEx SSE SSE2

Playing dvd://.
There are 21 titles on this DVD.
There are 1 chapters in this DVD title.
There are 1 angles in this DVD title.
number of audio channels on disk: 0.
number of subtitles on disk: 0
MPEG-PS file format detected.
MPEG: No audio stream found -> no sound.
VIDEO:  MPEG2  720x480  (aspect 2)  29.970 fps  3000.0 kbps (375.0 kbyte/s)
==========================================================================
Opening video decoder: [mpegpes] MPEG 1/2 Video passthrough
VDec: vo config request - 720 x 480 (preferred colorspace: Mpeg PES)
Could not find matching colorspace - retrying with -vf scale...
Opening video filter: [scale]
The selected video_out device is incompatible with this codec.
Try appending the scale filter to your filter list,
e.g. -vf spp,scale instead of -vf spp.
VDecoder init failed :(
Opening video decoder: [libmpeg2] MPEG 1/2 Video decoder libmpeg2-v0.4.0b
Selected video codec: [mpeg12] vfm: libmpeg2 (MPEG-1 or 2 (libmpeg2))
==========================================================================
Audio: no sound
Starting playback...
VDec: vo config request - 720 x 480 (preferred colorspace: Planar YV12)
VDec: using Planar YV12 as output csp (no 0)
Movie-Aspect is 1.33:1 - prescaling to correct movie aspect.
VO: [xv] 720x480 => 720x540 Planar YV12
V:   0.6  13/ 13 ??% ??% ??,?% 0 0

Exiting... (End of file)