zmc capture problem

arenzi · Post by **arenzi** » Wed Nov 18, 2009 12:01 pm

Hi,
my system is the following:
Ubuntu 9.10 desktop 386
ZoneMinder v.1.24.1
Video Camera: CCD camera + EasyCap USB Video Adapter (Syntec driver) .

I get this error from /var/log/messages:
...
Nov 18 12:31:55 angelo-desktop zmdc[1498]: INF ['zmc -d /dev/video' starting at 09/11/18 12:31:55, pid = 2180]
Nov 18 12:31:55 angelo-desktop zmdc[2180]: INF ['zmc -d /dev/video' started at 09/11/18 12:31:55]
Nov 18 12:31:55 angelo-desktop zmc_dvideo[2180]: INF [Debug Level = 0, Debug Log = <none>]
Nov 18 12:31:55 angelo-desktop zmc_dvideo[2180]: INF [Starting Capture]
Nov 18 12:31:55 angelo-desktop zmc_dvideo[2180]: INF [Got signal 6 (Aborted), exiting and forcing backtrace]
...

I got the following output from v4l-info:
### v4l2 device info [/dev/video0] ###
general info
VIDIOC_QUERYCAP
driver : "stk11xx"
card : "Syntek USB Video Camera"
bus_info : "usb-0000:00:1d.7-7"
version : 2.2.0
capabilities : 0x5000001 [VIDEO_CAPTURE,READWRITE,STREAMING]

standards
VIDIOC_ENUMSTD(0)
index : 0
id : 0x0 []
name : "webcam"
frameperiod.numerator : 0
frameperiod.denominator : 0
framelines : 0

inputs
VIDIOC_ENUMINPUT(0)
index : 0
name : "Input1"
type : CAMERA
audioset : 0
tuner : 0
std : 0x0 []
status : 0x0 []
VIDIOC_ENUMINPUT(1)
index : 1
name : "Input2"
type : CAMERA
audioset : 0
tuner : 0
std : 0x0 []
status : 0x0 []
VIDIOC_ENUMINPUT(2)
index : 2
name : "Input3"
type : CAMERA
audioset : 0
tuner : 0
std : 0x0 []
status : 0x0 []
VIDIOC_ENUMINPUT(3)
index : 3
name : "Input4"
type : CAMERA
audioset : 0
tuner : 0
std : 0x0 []
status : 0x0 []

video capture
VIDIOC_ENUM_FMT(0,VIDEO_CAPTURE)
index : 0
type : VIDEO_CAPTURE
flags : 0
description : "rgb24"
pixelformat : 0x33424752 [RGB3]
VIDIOC_ENUM_FMT(1,VIDEO_CAPTURE)
index : 1
type : VIDEO_CAPTURE
flags : 0
description : "rgb32"
pixelformat : 0x34424752 [RGB4]
VIDIOC_ENUM_FMT(2,VIDEO_CAPTURE)
index : 2
type : VIDEO_CAPTURE
flags : 0
description : "bgr24"
pixelformat : 0x33524742 [BGR3]
VIDIOC_ENUM_FMT(3,VIDEO_CAPTURE)
index : 3
type : VIDEO_CAPTURE
flags : 0
description : "bgr32"
pixelformat : 0x34524742 [BGR4]
VIDIOC_ENUM_FMT(4,VIDEO_CAPTURE)
index : 4
type : VIDEO_CAPTURE
flags : 0
description : "uyvy"
pixelformat : 0x59565955 [UYVY]
VIDIOC_ENUM_FMT(5,VIDEO_CAPTURE)
index : 5
type : VIDEO_CAPTURE
flags : 0
description : "yuyv"
pixelformat : 0x56595559 [YUYV]
VIDIOC_G_FMT(VIDEO_CAPTURE)
type : VIDEO_CAPTURE
fmt.pix.width : 640
fmt.pix.height : 480
fmt.pix.pixelformat : 0x33524742 [BGR3]
fmt.pix.field : NONE
fmt.pix.bytesperline : 1920
fmt.pix.sizeimage : 921600
fmt.pix.colorspace : SRGB
fmt.pix.priv : 0

controls
VIDIOC_QUERYCTRL(BASE+0)
id : 9963776
type : INTEGER
name : "Brightness"
minimum : 0
maximum : 65280
step : 1
default_value : 32512
flags : 0
VIDIOC_QUERYCTRL(BASE+1)
id : 9963777
type : INTEGER
name : "Contrast"
minimum : 0
maximum : 65280
step : 1
default_value : 32512
flags : 0
VIDIOC_QUERYCTRL(BASE+2)
id : 9963778
type : INTEGER
name : "Saturation"
minimum : 0
maximum : 65280
step : 1
default_value : 32512
flags : 0
VIDIOC_QUERYCTRL(BASE+3)
id : 9963779
type : INTEGER
name : "Hue"
minimum : 0
maximum : 65280
step : 1
default_value : 32512
flags : 0

### video4linux device info [/dev/video0] ###
general info
VIDIOCGCAP
name : "stk11xx"
type : 0x1 [CAPTURE]
channels : 1
audios : 0
maxwidth : 720
maxheight : 576
minwidth : 640
minheight : 480

channels
VIDIOCGCHAN(0)
channel : 0
name : "Webcam"
tuners : 0
flags : 0x0 []
type : CAMERA
norm : 0

tuner
ioctl VIDIOCGTUNER: Invalid argument

audio
ioctl VIDIOCGAUDIO: Invalid argument

picture
VIDIOCGPICT
brightness : 32767
hue : 65535
colour : 32767
contrast : 32767
whiteness : 65535
depth : 24
palette : RGB24

buffer
VIDIOCGFBUF
base : (nil)
height : 0
width : 0
depth : 0
bytesperline : 0

window
VIDIOCGWIN
x : 0
y : 0
width : 640
height : 480
chromakey : 0
flags : 3224892003

I've no idea where to go!
Any help would be very appreciate.
Thanks.
Angelo

TechGuy · Post by **TechGuy** » Wed Nov 18, 2009 11:24 pm

Its probably a permissions problem. Check to make sure apache, or what ever you set zmuser to has permissions to /dev/video0.

you can also check to see if zmc -d ... runs a root by running it from a shell prompt. If it fails than it's likely not a permissions problem.

arenzi · Post by **arenzi** » Thu Nov 19, 2009 3:03 pm

Hi TechGuy,
zmc -d /dev/video0 runs smoothly

also "chmod 777 /dev/video0"
and "zmfix -a"

but I get the same error in the log.

Thank you anyway.

TechGuy · Post by **TechGuy** » Fri Nov 20, 2009 12:05 am

Try capturing video using ffmpeg. If it works you can use ZM ffmpeg support to stream the video into zoneminder.

If ffmpeg also crashes, then there is probably a bug in the video capture driver. Search to see if you can find an updated driver.

OT: USB isn't really a good transport for video capture, Virtually all USB 2.0 devices only support FULL-Speed (12 Mbps) and not High-Speed (480 Mbps). USB packets are tiny (64 bytes).