Mauvaise qualité d'image?

Hi,
I'm using XDTV with OpenSuSE 10.2. Recently I discovered that I can't record from my camera or tv programs. And this worked since last week. My problem is ALSA sound sistem, I think, because when I start the program with "xdtv -noalsa" and start to record, recording is working but the sound is very bad. If I start the program in normal mode with ALSA active, I can't record, the program is blocked, I can not even stop it.
My machine have an Intel-Celeron 2.56GHz processor with 512MB/RAM.

silviu@Silviu:~> lsmod | grep bttv
bttv 171124 1 bt878
video_buf 28676 1 bttv
firmware_class 14336 1 bttv
ir_common 32132 1 bttv
compat_ioctl32 5504 1 bttv
i2c_algo_bit 12808 1 bttv
btcx_risc 9096 1 bttv
tveeprom 18576 1 bttv
videodev 26880 1 bttv
v4l2_common 26368 3 tuner,bttv,videodev
i2c_core 25216 5 tuner,bttv,i2c_algo_bit,tveeprom,i2c_i801
With GDB, I'm not sure if I proceeded in a proper way, but the message was the following:
silviu@Silviu:~> gdb xdtv
GNU gdb 6.5
Copyright (C) 2006 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB. Type "show warranty" for details.
This GDB was configured as "i586-suse-linux"...Using host libthread_db library "/lib/libthread_db.so.1".

(gdb) run
Starting program: /usr/bin/xdtv
Failed to read a valid object file image from memory.
[Thread debugging using libthread_db enabled]
[New Thread -1223235888 (LWP 5672)]

This is xdtv 2.4.0 running on Linux/i686 (2.6.18.8-0.5-default).
scandir: No such file or directory
filename = /home/silviu/.xdtv/xdtvrc
Warning: Missing charsets in String to FontSet conversion
wmhooks: netwm detected
wmhooks: netwm state above supported
wmhooks: netwm fullscreen supported
wmhooks: nothing found...
DGA: server=2.0, include=2.0
VidMode: server=2.2, include=2.2
available video mode(s): 1024x768 800x600 768x576 832x624 800x600 800x600 800x600 768x576 768x576 768x576 640x480 640x480 640x480 416x312 400x300 400x300 400x300
Selected XvVideo: video4linux on port 73 (overlay)

Selected XvImage adaptor with yuyv support: ATI Radeon Video Overlay on port 74 (grabdisplay)
XV Information:
XV_ENCODING max value = 1000
XV_ENCODING min value = -1000
XV_ENCODING cur value = 0

XV_BRIGHTNESS max value = 1000
XV_BRIGHTNESS min value = -1000
XV_BRIGHTNESS cur value = 37

XV_CONTRAST max value = 1000
XV_CONTRAST min value = -1000
XV_CONTRAST cur value = -146

XV_SATURATION max value = 1000
XV_SATURATION min value = -1000
XV_SATURATION cur value = -421

XV_HUE max value = 1000
XV_HUE min value = -1000
XV_HUE cur value = 0

XV_MUTE max value = 1
XV_MUTE min value = 0
XV_MUTE cur value = 0

XV_FREQ max value = 16000
XV_FREQ min value = 0
XV_FREQ cur value = 9076

Warning: Cannot convert string "none" to type relief
*** GRABBER DEVICE TYPE = v4l2
Warning: Missing charsets in String to FontSet conversion
MMX, SSE, AMD MMX extensions, SSE2, have been detected.
Method mmxext_64K
*** AUDIO DEVICE TYPE = alsa
*** MIXER DEVICE TYPE = alsa
call to divx_audio_start()
[New Thread -1244628080 (LWP 5676)]
c

Program received signal SIGINT, Interrupt.
[Switching to Thread -1223235888 (LWP 5672)]
0xb7ef4410 in ?? ()
(gdb) c
Continuing.
where

Program received signal SIGINT, Interrupt.
0xb7ef4410 in ?? ()
(gdb) where
#0 0xb7ef4410 in ?? ()
#1 0xbfb8a088 in ?? ()
#2 0x0000162c in ?? ()
#3 0x00000000 in ?? ()
(gdb) up
#1 0xbfb8a088 in ?? ()
(gdb) quit
The program is running. Exit anyway? (y or n) y
Can you help me ?
Thank you !