Hi Eugeny,
> I'm trying to get a QC Sphere running on Debian Etch and have no result.
>
> Microsoft Windows XP says that this is an "Logitech QuickCam PTZ".
> Box labeled as "Logitech QuickCam Sphere".
>
> Today I have compiled uvcvideo from SVN, and load it:
> Oct 17 22:18:48 nemos kernel: uvcvideo: Found UVC 1.00 device <unnamed>
> (046d:08c2)
> Oct 17 22:18:48 nemos kernel: usbcore: registered new driver uvcvideo
So the webcam should be supported. That's good news :-)
> Seems good, and xawtv found it:
> /dev/video0: OK [ -device /dev/video0 ]
> type : v4l2
> name : USB Video Class device
> flags: capture
>
> But no one capture it.
>
> Mplayer:
>
> $ mplayer tv:// -tv driver=v4l2
> [some output skipped]
> Playing tv://.
> Selected driver: v4l2
> name: Video 4 Linux 2 input
> author: Martin Olschewski <[EMAIL PROTECTED]>
> comment: first try, more to come ;-)
> v4l2: ioctl get standard failed: Invalid argument
> v4l2: ioctl set mute failed: Invalid argument
> v4l2: 0 frames successfully processed, 0 frames dropped.
> Exiting... (End of file)
mplayer is known to have problems with webcams. It assumes that all video
devices implement some optional functions which make no sense for webcams.
> mplayer's strace say:
> open("/dev/video0", O_RDWR|O_LARGEFILE) = 4
> ioctl(4, VIDIOC_QUERYCAP or VT_OPENQRY, 0x84efad4) = 0
> ioctl(4, VIDIOC_G_FMT or VT_SENDSIG, 0x84efb88) = 0
> ioctl(4, VIDIOC_G_STD, 0xafb0d248) = -1 EINVAL (Invalid argument)
> write(2, "v4l2: ioctl get standard failed:"..., 50v4l2: ioctl get standard
> failed: Invalid argument) = 46
>
> v4lctl:
>
> $ v4lctl list
> ioctl:
> VIDIOC_QUERYCTRL(id=134217730;type=unknown;name="";minimum=0;maximum=0;step
>=0;default_value=0;flags=0): Input/output error
> ioctl:
> VIDIOC_QUERYCTRL(id=134217735;type=unknown;name="";minimum=0;maximum=0;step
>=0;default_value=0;flags=0): Input/output error
> ioctl: VIDIOC_G_STD(std=0xa7d02880a7c333f6
> [PAL_B1,PAL_G,PAL_I,PAL_D,PAL_D1,PAL_K,PAL_M,PAL_N,NTSC_M,NTSC_M_JP,SECAM_B
>,SECAM_D,SECAM_L,?ATSC_8_VSB,ATSC_16_VSB,(null),(null),(null),(null),(null),
>(null),(null),(null),(null),(null),(null),(null),(null),(null),(null)]):
> Invalid argument
> ioctl: VIDIOC_G_CTRL(id=9963792;value=39): Input/output error
> ioctl: VIDIOC_G_CTRL(id=134217736;value=2): Input/output error
> config: invalid value for input: Television
> valid choices for "input": "Camera"
> config: invalid value for norm: norm
> valid choices for "norm":
> attribute | type | current | default | comment
> -----------+--------+---------+---------+----------------------------------
>--- norm | choice | (null) | (null) |
> input | choice | Camera | Camera | Camera
> bright | int | 127 | 127 | range is 0 => 255
> contrast | int | 32 | 32 | range is 0 => 255
> color | int | 39 | 39 | range is 0 => 255
> Gamma | int | 39 | 220 | range is 100 => 220
> Gain | int | 16 | 0 | range is 0 => 255
> Backlight | int | 1 | 1 | range is 0 => 2
> Power Line | choice | 60 Hz | 60 Hz | Disabled 50 Hz 60 Hz
> Pan/Tilt ( | int | 2 | 0 | range is 0 => 3
> Exposure, | int | 8 | 8 | range is 0 => 0
> Exposure ( | int | 2527 | 166 | range is 1 => 10000
> White Bala | bool | on | on |
> White Bala | int | 4000 | 4000 | range is 2800 => 6500
>
>
> Ekiga just give me "Your video driver doesn't support the requested video
> format" message.
>
>
> ...and while I tried kernel says:
>
> Oct 17 22:24:14 nemos kernel: uvcvideo: Failed to query (132) UVC control 8
> (unit 2) : -32.
> Oct 17 22:24:14 nemos kernel: uvcvideo: Failed to query (135) UVC control 1
> (unit 9) : 1.
> Oct 17 22:24:14 nemos kernel: uvcvideo: Failed to query (129) UVC control 9
> (unit 2) : -32.
> Oct 17 22:24:14 nemos kernel: uvcvideo: Failed to query (129) UVC control 2
> (unit 9) : -32.
That's a known issue. To make it short, the Logitech webcams have a hardware
bug which is only triggered by Linux. We're trying to find a workaround.
> Some tech info:
> nemos:~# uname -a
> Linux nemos 2.6.17-2-686 #1 SMP Wed Sep 13 16:34:10 UTC 2006 i686 GNU/Linux
> nemos:~# lsmod | grep usb
> usb_storage 70560 0
> scsi_mod 123080 2 sd_mod,usb_storage
> usbkbd 6784 0
> usbcore 111616 6
> uvcvideo,usb_storage,usbkbd,uhci_hcd,ehci_hcd ide_core 111016
> 5 usb_storage,ide_cd,ide_disk,piix,generic
>
> Any ideas how to capture video from this?
Try luvcview and/or uvccapture and see if the webcam works with them. Ekiga is
also known to work if you want a videoconferencing application. As for
mplayer, try to bother the developers until they fix it :-)
Cheers,
Laurent Pinchart
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