problema con alsa

[okubo]

hola, al intentar reproducir algunos ficheros de video con mplayer y con alsa se entrecorta, cosa que por ejemplo no sucede con oss, queria saber como puedo solucionarlo, aquí pongo la salida de un video:

$ mplayer el.principe.de.bel.air.-.especial.tomas.falsas.avi
MPlayer 2:0.99+1.0pre7try2+cvs20060117-0ubuntu6 (C) 2000-2006 MPlayer Team
CPU: Intel Pentium M Dothan (Family: 6, Stepping: 8)
CPUflags: MMX: 1 MMX2: 1 3DNow: 0 3DNow2: 0 SSE: 1 SSE2: 1
Compiled with runtime CPU detection.


91 audio & 204 video codecs
Linux RTC init error in ioctl (rtc_irqp_set 1024): Permission denied
Try adding "echo 1024 > /proc/sys/dev/rtc/max-user-freq" to your system startup scripts.
Opening joystick device /dev/input/js0
Can't open joystick device /dev/input/js0: No such file or directory
Can't init input joystick
Setting up LIRC support...
mplayer: could not connect to socket
mplayer: No such file or directory
Failed to open LIRC support.
You will not be able to use your remote control.
Playing el.principe.de.bel.air.-.especial.tomas.falsas.avi.
AVI file format detected.
VIDEO: [XVID] 640x464 24bpp 24.996 fps 1039.1 kbps (126.8 kbyte/s)
Clip info:
Software: Nandub v1.0rc2
================================================== ========================
Opening audio decoder: [mp3lib] MPEG layer-2, layer-3
AUDIO: 44100 Hz, 2 ch, s16le, 128.0 kbit/9.07% (ratio: 16000->176400)
Selected audio codec: [mp3] afm: mp3lib (mp3lib MPEG layer-2, layer-3)
================================================== ========================
================================================== ========================
Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
Selected video codec: [ffodivx] vfm: ffmpeg (FFmpeg MPEG-4)
================================================== ========================
Building audio filter chain for 44100Hz/2ch/s16le -> 0Hz/0ch/??...
alsa-init: 1 soundcard found, using: default
alsa: 44100 Hz/2 channels/4 bpf/60208 bytes buffer/Signed 16 bit Little Endian
AO: [alsa] 44100Hz 2ch s16le (2 bytes per sample)
Building audio filter chain for 44100Hz/2ch/s16le -> 44100Hz/2ch/s16le...
Starting playback...
VDec: vo config request - 640 x 464 (preferred colorspace: Planar YV12)
VDec: using Planar YV12 as output csp (no 0)
Movie-Aspect is 1.38:1 - prescaling to correct movie aspect.
VO: [xv] 640x464 => 640x464 Planar YV12
alsa-space: xrun of at least 10.296 msecs. resetting stream,?% 0 0
alsa-space: xrun of at least 0.077 msecs. resetting stream?,?% 4 0
alsa-space: xrun of at least 0.078 msecs. resetting stream0.6% 6 0
alsa-space: xrun of at least 0.067 msecs. resetting stream0.6% 7 0
alsa-space: xrun of at least 0.080 msecs. resetting stream0.6% 8 0
alsa-space: xrun of at least 0.071 msecs. resetting stream0.5% 9 0
alsa-space: xrun of at least 0.070 msecs. resetting stream0.5% 10 0
alsa-space: xrun of at least 0.069 msecs. resetting stream0.5% 11 0
alsa-space: xrun of at least 0.078 msecs. resetting stream0.5% 12 0
alsa-space: xrun of at least 0.060 msecs. resetting stream0.6% 13 0
alsa-space: xrun of at least 0.071 msecs. resetting stream0.6% 14 0
alsa-space: xrun of at least 0.070 msecs. resetting stream0.6% 15 0
alsa-space: xrun of at least 0.069 msecs. resetting stream0.6% 16 0
alsa-space: xrun of at least 0.078 msecs. resetting stream0.6% 17 0
alsa-space: xrun of at least 0.073 msecs. resetting stream0.6% 18 0
alsa-space: xrun of at least 0.070 msecs. resetting stream0.5% 19 0
alsa-space: xrun of at least 0.071 msecs. resetting stream0.5% 20 0
alsa-space: xrun of at least 0.069 msecs. resetting stream0.6% 21 0
alsa-space: xrun of at least 0.079 msecs. resetting stream0.6% 22 0
alsa-space: xrun of at least 0.067 msecs. resetting stream0.5% 23 0
alsa-space: xrun of at least 0.067 msecs. resetting stream0.5% 24 0
alsa-space: xrun of at least 0.049 msecs. resetting stream0.5% 25 0


haber si alguien me puede echar una mano, gracias.