USB webcam bad immage at 640x480, all good at 352x288

Question

I set up motion, all work very well al 352x288, motion detection and stream is correct but if i set up resolution 640x480 i see this horizontal stripes:

and after some seconds motion crash. with the same hardware and with program called "mjpg-streamer", i can see a web stream at 640x480, so the hardware and driver work...

What can i tweak in config for cancel horizontal streaks?

ThankU! Daniele

Crash:

[1] Resizing pre_capture buffer to 1 items
[1] Started stream webcam server in port 8081
[1] Resizing pre_capture buffer to 3 items
[0] Thread 1 - Watchdog timeout, trying to do a graceful restart
[0] Thread 1 - Watchdog timeout, did NOT restart graceful,killing it!
[0] Calling vid_close() from motion_cleanup
[0] Closing video device /dev/video0
[1] v4l2_next: VIDIOC_DQBUF: EIO (s->pframe 1): Input/output error

Config:

root@OpenWrt:/etc# egrep -v '^$|^#|^;' motion.conf
daemon on
process_id_file /var/run/motion/motion.pid
setup_mode off
videodevice /dev/video0
v4l2_palette 6
input 8
norm 0
frequency 0
rotate 0
framerate 2
minimum_frame_time 5
netcam_tolerant_check off
auto_brightness off
brightness 0
contrast 0
saturation 0
hue 0
roundrobin_frames 1
roundrobin_skip 1
switchfilter off
threshold 1000
threshold_tune off
noise_level 32
noise_tune on
despeckle EedDl
smart_mask_speed 0
lightswitch 0
minimum_motion_frames 2
pre_capture 1
post_capture 0
gap 60
max_mpeg_time 0
output_all off
output_motion off
quality 75
ppm off
snapshot_interval 0
locate off
text_right %Y-%m-%d\n%T-%q
text_changes off
text_event %Y%m%d%H%M%S
text_double on
target_dir /www/usb/motion
snapshot_filename %v-%Y%m%d%H%M%S-snapshot
jpeg_filename %v-%Y%m%d%H%M%S-%q
movie_filename %v-%Y%m%d%H%M%S
timelapse_filename %Y%m%d-timelapse
webcam_port 8081
webcam_quality 70
webcam_motion off
webcam_maxrate 1
webcam_localhost off
webcam_limit 0
control_port 8082
control_localhost off
control_html_output on
control_authentication xxx:xxx
track_type 0
track_auto off
track_motorx 0
track_motory 0
track_maxx 0
track_maxy 0
track_iomojo_id 0
track_step_angle_x 10
track_step_angle_y 10
track_move_wait 10
track_speed 255
track_stepsize 40
quiet on
sql_log_image on
sql_log_snapshot on
sql_log_mpeg off
sql_log_timelapse off
sql_query insert into security(camera, filename, frame, file_type, time_stamp, event_time_stamp) values('%t', '%f', '%q', '%n', '%Y-%m-%d %T', '%C')

Environment

Motion version:	3.2.11.1
ffmpeg version:
Libraries:
Server OS:	Linux OpenWrt 2.6.30.10, Fonera 2.0

-- DanieleBusana - 13 Jul 2010

Answer

I have the same problem if i connect second camera to PCI-USB controller.

I suppose the problem is weak hardware speed: system bus/CPU/memory/etc. (?)

BRGDS from Russia,

Pavel