Hi all,
I got an old, cheap Qware EasyCam webcam. I have no idea what is the
model. In the end it does not metter much. I followed the LDP "The
Webcam HOWTO" on http://tldp.org/HOWTO/html_single/Webcam-HOWTO/
Everything looks basically fine up to the point I try to get some
information from my webcam. Trying to take a snapshot, I get:
~ % streamer -d -c /dev/video0 -b 16 -o test.jpeg
checking writer files [multiple image files] ...
video name=ppm ext=ppm: ext mismatch [need jpeg]
video name=pgm ext=pgm: ext mismatch [need jpeg]
video name=jpeg ext=jpeg: OK
files / video: JPEG (JFIF) / audio: none
vid-open: trying: v4l2-old...
vid-open: failed: v4l2-old
vid-open: trying: v4l2...
v4l2: open
v4l2: device info:
sn9c102 1.1.47 / SN9C1xx PC Camera @ usb-0000:00:1d.1-2
vid-open: ok: v4l2
movie_init_writer start
setformat: JPEG (JFIF) (320x240): failed
setformat: 12 bit YUV 4:2:0 (planar) (320x240): failed
setformat: 16 bit YUV 4:2:2 (planar) (320x240): failed
setformat: 24 bit TrueColor (BE: rgb) (320x240): failed
setformat: 24 bit TrueColor (LE: bgr) (320x240): failed
no way to get: 320x240 JPEG (JFIF)
movie writer initialisation failed
v4l2: close
~ %
The funny part is that the kopete devices configuration is showing me
some black-green black low quality stream, which made me think that
that's a driver issue. I compiled the latest kernel from kernel.org,
which had newer version of the driver (1.1.47), but that did not change
anything.
The v4l-info output looks fine to me:
### v4l2 device info [/dev/video0] ###
general info
VIDIOC_QUERYCAP
driver : "sn9c102"
card : "SN9C1xx PC Camera"
bus_info : "usb-0000:00:1d.1-2"
version : 1.1.47
capabilities : 0x5000001 [VIDEO_CAPTURE,READWRITE,STREAMING]
standards
inputs
VIDIOC_ENUMINPUT(0)
index : 0
name : "Camera"
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 : "bayer rgb"
pixelformat : 0x31384142 [BA81]
VIDIOC_ENUM_FMT(1,VIDEO_CAPTURE)
index : 1
type : VIDEO_CAPTURE
flags : 1
description : "compressed"
pixelformat : 0x30313953 [S910]
VIDIOC_G_FMT(VIDEO_CAPTURE)
type : VIDEO_CAPTURE
fmt.pix.width : 320
fmt.pix.height : 240
fmt.pix.pixelformat : 0x31384142 [BA81]
fmt.pix.field : NONE
fmt.pix.bytesperline : 320
fmt.pix.sizeimage : 76800
fmt.pix.colorspace : SRGB
fmt.pix.priv : 8
controls
VIDIOC_QUERYCTRL(PRIVATE_BASE+0)
id : 134217728
type : INTEGER
name : "DAC magnitude"
minimum : 0
maximum : 255
step : 1
default_value : 4
flags : 0
VIDIOC_QUERYCTRL(PRIVATE_BASE+1)
id : 134217729
type : INTEGER
name : "green balance"
minimum : 0
maximum : 15
step : 1
default_value : 0
flags : 0
Any idea how to solve the problem is welcome...
Cheers,
Ivan
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