[MPlayer-users] skipping while watching DVD

[jonathan]

If I watch a DVD the DVD skips all few seconds. The sound skips which is 
mostly noticeable but also the video-stream skips.

I'm using:
Athlon XP 2500+
Nvidia GeForce MX 420
nvidia graphic-driver
a brand new Lite-On DVD-ROM 24x
alsa
linux 2.6.18.3
kde 3.5.3
MPlayer 1.0rc1-4.0.3

mplayer output:
mplayer dvd://
MPlayer 1.0rc1-4.0.3 (C) 2000-2006 MPlayer Team
CPU: AMD Athlon(tm) XP 2500+ (Family: 6, Model: 10, Stepping: 0)
CPUflags:  MMX: 1 MMX2: 1 3DNow: 1 3DNow2: 1 SSE: 1 SSE2: 0
Compiled for x86 CPU with extensions: MMX MMX2 3DNow 3DNowEx SSE

Playing dvd://.
There are 3 titles on this DVD.
There are 1 chapters in this DVD title.
There are 1 angles in this DVD title.
audio stream: 0 format: ac3 (stereo) language: ÿÿ aid: 128.
number of audio channels on disk: 1.
number of subtitles on disk: 0
MPEG-PS file format detected.
VIDEO:  MPEG2  720x480  (aspect 2)  29.970 fps  8000.0 kbps (1000.0 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 adding the scale filter, 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))
==========================================================================
==========================================================================
Opening audio decoder: [liba52] AC3 decoding with liba52
Using SSE optimized IMDCT transform
Using MMX optimized resampler
AUDIO: 48000 Hz, 2 ch, s16le, 192.0 kbit/12.50% (ratio: 24000->192000)
Selected audio codec: [a52] afm: liba52 (AC3-liba52)
==========================================================================
AO: [alsa] 48000Hz 2ch s16le (2 bytes per sample)
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
A:   3.2 V:   3.2 A-V:  0.025 ct:  0.050  91/ 91 15%  3%  0.6% 0 0

If I use "mplayer -vo null dvd://" the sound skips too and if I open the 
DVD without sound the video-stream stucks too.

If I use "mplayer dvd:// -ao oss:/dev/dsp1" oss is emulated by alsa. The 
sound is okay, but the video skips too. And I get an message:
************************************************
**** Your system is too SLOW to play this!  ****
************************************************

Playing an *.iso file works great. I have the same problems with VLC.

I hope someone of you can help me.

Jonathan