Hi All,
I hope someone can help me resolve a niggly problem I'm having. I have
'really' cheap USB cam that I'm hoping to use as an intranet webcam. The
USB drivers appear to load quite happily. (System is Redhat 7.2 with
Kernel 2.4.9-21)
I'm capturing the images using the following command line:
/usr/bin/v4lctl -v 2 -c /dev/video snap jpeg full \
/var/www/html/cam/CAM.jpg >>/$HOME/v4lctl.out 2>> $HOME/v4lctl.out
The script then sleeps for a short while and then loops.
The script will capture roughly 4-10 roughly frames and then freeze
(But not
fatally - I can terminate it with ctrl-c). xawtv will also capture video
for a few seconds and then freeze too. There are no messages in the
syslog.
Below is the output of lsmod and below that is the contents of
v4lctl.out,
(I've only provided the first succesful capture output and the last
[failure]).
Any information on how to extract better debugging & logging from v4l
would
help too.
Thanks in advance
Don Harvie
Module Size Used by
trident 27712 0
soundcore 4452 2 [trident]
ide-cd 27072 0 (autoclean)
cdrom 28576 0 (autoclean) [ide-cd]
ac97_codec 9504 0 (autoclean) [trident]
autofs 11556 0 (autoclean)
eepro100 17680 1
cpia_usb 4740 0 (autoclean) (unused)
parport_pc 14916 0 (autoclean)
cpia_pp 3972 0 (autoclean) (unused)
parport 25600 0 (autoclean) [parport_pc cpia_pp]
cpia 23936 0 [cpia_usb cpia_pp]
videodev 5312 1 [cpia]
usb-ohci 19872 0 (unused)
usbcore 51808 1 [cpia_usb usb-ohci]
ext3 62592 3
jbd 41092 3 [ext3]
stat /dev/.devfsd: No such file or directory
Xvideo: 0 adaptors available.
Xvideo: no usable video port found
Xvideo: hw scaler disabled
init: trying: v4l2...
init: failed: v4l2
init: trying: v4l...
v4l: open: /dev/video (CPiA Camera)
capabilities: capture
size : 48x48 => 352x288
channels: 1
ioctl: VIDIOCGCHAN(0,Camera,flags=0x0,type=2,norm=0): ok
Camera: 0 camera
audios : 0
ioctl: VIDIOCSCHAN(0,Camera,flags=0x0,type=2,norm=0): ok
PALioctl: VIDIOCSCHAN(0,Camera,flags=0x0,type=2,norm=1): ok
NTSCioctl: VIDIOCSCHAN(0,Camera,flags=0x0,type=2,norm=2): ok
SECAMioctl: VIDIOCSCHAN(0,Camera,flags=0x0,type=2,norm=3): ok
AUTO
ioctl: VIDIOCGFBUF(base=(nil),size=0x0,depth=0,bpl=0): Invalid argument
fbuffer : base=0x(nil) size=0x0 depth=0 bpl=0
ioctl: VIDIOCGPICT(params=32768/32768/32768/32768/0,depth=24,fmt=4): ok
picture : brightness=32768 hue=32768 colour=32768 contrast=32768
picture : whiteness=0 depth=24 palette=rgb24
ioctl: VIDIOCGMBUF(size=811008,frames=2): ok
mbuf: size=811008 frames=2
v4l: using mapped buffers for capture
init: ok: v4l
ioctl: VIDIOCGCHAN(0,Camera,flags=0x0,type=2,norm=0): ok
ioctl: VIDIOCGPICT(params=32768/32768/32768/32768/0,depth=24,fmt=4): ok
ioctl: VIDIOCGPICT(params=32768/32768/32768/32768/0,depth=24,fmt=4): ok
ioctl: VIDIOCGPICT(params=32768/32768/32768/32768/0,depth=24,fmt=4): ok
ioctl: VIDIOCGPICT(params=32768/32768/32768/32768/0,depth=24,fmt=4): ok
cmd: "snap" "jpeg" "full" "/var/www/html/cam/CAM.jpg" "msg" "texthere"
v4l: setformat
ioctl: VIDIOCGCAP(CPiA
Camera,type=0x1,chan=1,audio=0,size=48x48-352x288): ok
v4l: capture probe 24 bit TrueColor (BE: rgb)... failed
setformat: 24 bit TrueColor (BE: rgb) (352x288): failed
v4l: setformat
ioctl: VIDIOCGCAP(CPiA
Camera,type=0x1,chan=1,audio=0,size=48x48-352x288): ok
v4l: capture probe 24 bit TrueColor (LE: bgr)... ioctl:
VIDIOCMCAPTURE(0,fmt=4,size=48x48): ok
ioctl: VIDIOCSYNC(0): ok
ok
setformat: 24 bit TrueColor (LE: bgr) (352x288): ok
v4l: setformat
ioctl: VIDIOCGCAP(CPiA
Camera,type=0x1,chan=1,audio=0,size=48x48-352x288): ok
v4l: getimage
ioctl: VIDIOCMCAPTURE(0,fmt=4,size=352x288): ok
ioctl: VIDIOCSYNC(0): ok
convert-in : 352x288 24 bit TrueColor (LE: bgr) (size=304128)
convert-out: 352x288 24 bit TrueColor (BE: rgb) (size=304128)
v4l: close
~
stat /dev/.devfsd: No such file or directory
Xvideo: 0 adaptors available.
Xvideo: no usable video port found
Xvideo: hw scaler disabled
init: trying: v4l2...
init: failed: v4l2
init: trying: v4l...
v4l: open: /dev/video (CPiA Camera)
capabilities: capture
size : 48x48 => 352x288
channels: 1
ioctl: VIDIOCGCHAN(0,Camera,flags=0x0,type=2,norm=0): ok
Camera: 0 camera
audios : 0
ioctl: VIDIOCSCHAN(0,Camera,flags=0x0,type=2,norm=0): ok
PALioctl: VIDIOCSCHAN(0,Camera,flags=0x0,type=2,norm=1): ok
NTSCioctl: VIDIOCSCHAN(0,Camera,flags=0x0,type=2,norm=2): ok
SECAMioctl: VIDIOCSCHAN(0,Camera,flags=0x0,type=2,norm=3): ok
AUTO
ioctl: VIDIOCGFBUF(base=(nil),size=0x0,depth=0,bpl=0): Invalid argument
fbuffer : base=0x(nil) size=0x0 depth=0 bpl=0
ioctl: VIDIOCGPICT(params=32768/32768/32768/32768/0,depth=24,fmt=4): ok
picture : brightness=32768 hue=32768 colour=32768 contrast=32768
picture : whiteness=0 depth=24 palette=rgb24
ioctl: VIDIOCGMBUF(size=811008,frames=2): ok
mbuf: size=811008 frames=2
v4l: using mapped buffers for capture
init: ok: v4l
ioctl: VIDIOCGCHAN(0,Camera,flags=0x0,type=2,norm=0): ok
ioctl: VIDIOCGPICT(params=32768/32768/32768/32768/0,depth=24,fmt=4): ok
ioctl: VIDIOCGPICT(params=32768/32768/32768/32768/0,depth=24,fmt=4): ok
ioctl: VIDIOCGPICT(params=32768/32768/32768/32768/0,depth=24,fmt=4): ok
ioctl: VIDIOCGPICT(params=32768/32768/32768/32768/0,depth=24,fmt=4): ok
cmd: "snap" "jpeg" "full" "/var/www/html/cam/CAM.jpg" "msg" "texthere"
v4l: setformat
ioctl: VIDIOCGCAP(CPiA
Camera,type=0x1,chan=1,audio=0,size=48x48-352x288): ok
v4l: capture probe 24 bit TrueColor (BE: rgb)... failed
setformat: 24 bit TrueColor (BE: rgb) (352x288): failed
v4l: setformat
ioctl: VIDIOCGCAP(CPiA
Camera,type=0x1,chan=1,audio=0,size=48x48-352x288): ok
v4l: capture probe 24 bit TrueColor (LE: bgr)... ioctl:
VIDIOCMCAPTURE(0,fmt=4,size=48x48): ok
ioctl: VIDIOCSYNC(0): ok
ok
setformat: 24 bit TrueColor (LE: bgr) (352x288): ok
v4l: setformat
ioctl: VIDIOCGCAP(CPiA
Camera,type=0x1,chan=1,audio=0,size=48x48-352x288): ok
v4l: getimage
--
Thanks,
Don Harvie Ph +61 2 9882 5963
Network & Firewall Engineer, Fax +61 2 9882 5993
Telstra Enterprise Services Pty Limited Mob +61 417 411 427
Level 3, 112 Talavera Rd Email Don_Harvie@xxxxxxxxxxxxxxxxxxxxxxxxx
North Ryde NSW 2113 don.harvie@xxxxxxx (personal)
Australia
