[gentoo-user] webcam on Gentoo Logitech C270

[gentoo-user] webcam on Gentoo Logitech C270

[Joseph]

I have a Logitech C270 webcam but I can not make it to work with linux/skype

USB sound in kernel is ON:
CONFIG_SND_USB_AUDIO=y

lsusb
...
Bus 008 Device 006: ID 046d:0825 Logitech, Inc. Webcam C270

When I plug the USB cam I get an error:

 xhci_hcd 0000:02:00.0: ERROR: unexpected command completion code 0x11.
 usb 8-1: Not enough bandwidth for altsetting 4
 6:3:4: usb_set_interface failed (-22)


-- 
Joseph

Re: [gentoo-user] webcam on Gentoo Logitech C270

[Joseph]

On 12/21/14 09:51, Joseph wrote:
>I have a Logitech C270 webcam but I can not make it to work with linux/skype
>
>USB sound in kernel is ON:
>CONFIG_SND_USB_AUDIO=y
>
>lsusb
>...
>Bus 008 Device 006: ID 046d:0825 Logitech, Inc. Webcam C270
>
>When I plug the USB cam I get an error:
>
> xhci_hcd 0000:02:00.0: ERROR: unexpected command completion code 0x11.
> usb 8-1: Not enough bandwidth for altsetting 4
> 6:3:4: usb_set_interface failed (-22)

I have plug the webcam to standard USB-2 port and it is recognized I think:

[ 3321.717170] usb 3-2: usb_probe_device
[ 3321.717173] usb 3-2: configuration #1 chosen from 1 choice
[ 3321.717337] usb 3-2: adding 3-2:1.0 (config #1, interface 0)
[ 3321.717369] usb 3-2: adding 3-2:1.1 (config #1, interface 1)
[ 3321.717387] usb 3-2: adding 3-2:1.2 (config #1, interface 2)
[ 3321.717406] snd-usb-audio 3-2:1.2: usb_probe_interface
[ 3321.717409] snd-usb-audio 3-2:1.2: usb_probe_interface - got id
[ 3323.136617] set resolution quirk: cval->res = 384
[ 3323.137048] usb 3-2: adding 3-2:1.3 (config #1, interface 3)

But I can not see it in skype setting. 

-- 
Joseph

Re: [gentoo-user] webcam on Gentoo Logitech C270

[wabenbau]

Am Sonntag, 21.12.2014 um 10:00
schrieb Joseph <syscon780@gmail.com>:

> On 12/21/14 09:51, Joseph wrote:
> >I have a Logitech C270 webcam but I can not make it to work with
> >linux/skype
> >
> >USB sound in kernel is ON:
> >CONFIG_SND_USB_AUDIO=y

I guess you should also take a look at 
Device Drivers > Multimedia support > Media USB Adapters

e.g.
MEDIA_USB_SUPPORT
MEDIA_CAMERA_SUPPORT
MEDIA_CONTROLLER
...

Regards
wabe

Re: [gentoo-user] webcam on Gentoo Logitech C270

[meino.cramer]

wabenbau@gmail.com <wabenbau@gmail.com> [14-12-21 18:36]:
> Am Sonntag, 21.12.2014 um 10:00
> schrieb Joseph <syscon780@gmail.com>:
> 
> > On 12/21/14 09:51, Joseph wrote:
> > >I have a Logitech C270 webcam but I can not make it to work with
> > >linux/skype
> > >
> > >USB sound in kernel is ON:
> > >CONFIG_SND_USB_AUDIO=y
> 
> I guess you should also take a look at 
> Device Drivers > Multimedia support > Media USB Adapters
> 
> e.g.
> MEDIA_USB_SUPPORT
> MEDIA_CAMERA_SUPPORT
> MEDIA_CONTROLLER
> ...
> 
> Regards
> wabe
> 

You need UVC-Support:
CONFIG_USB_F_UVC=y

Best
Meino

Re: [gentoo-user] webcam on Gentoo Logitech C270

[Joseph]

On 12/21/14 18:56, meino.cramer@gmx.de wrote:
>wabenbau@gmail.com <wabenbau@gmail.com> [14-12-21 18:36]:
>> Am Sonntag, 21.12.2014 um 10:00
>> schrieb Joseph <syscon780@gmail.com>:
>>
>> > On 12/21/14 09:51, Joseph wrote:
>> > >I have a Logitech C270 webcam but I can not make it to work with
>> > >linux/skype
>> > >
>> > >USB sound in kernel is ON:
>> > >CONFIG_SND_USB_AUDIO=y
>>
>> I guess you should also take a look at
>> Device Drivers > Multimedia support > Media USB Adapters
>>
>> e.g.
>> MEDIA_USB_SUPPORT
>> MEDIA_CAMERA_SUPPORT
>> MEDIA_CONTROLLER
>> ...
>>
>> Regards
>> wabe
>>
>
>You need UVC-Support:
>CONFIG_USB_F_UVC=y

I'm using kernle: linux-3.10.7
but there is no CONFIG_USB_F_UVC setting, I can not find anything for UVC

grep UVC .config
I get empty line.

-- 
Joseph

Re: [gentoo-user] webcam on Gentoo Logitech C270

[Joseph]

On 12/21/14 18:32, wabenbau@gmail.com wrote:
>Am Sonntag, 21.12.2014 um 10:00
>schrieb Joseph <syscon780@gmail.com>:
>
>> On 12/21/14 09:51, Joseph wrote:
>> >I have a Logitech C270 webcam but I can not make it to work with
>> >linux/skype
>> >
>> >USB sound in kernel is ON:
>> >CONFIG_SND_USB_AUDIO=y
>
>I guess you should also take a look at
>Device Drivers > Multimedia support > Media USB Adapters
>
>e.g.
>MEDIA_USB_SUPPORT
>MEDIA_CAMERA_SUPPORT
>MEDIA_CONTROLLER

I have enable CONFIG_MEDIA_USB_SUPPORT and CONFIG_MEDIA_CAMERA_SUPPORT  but skype still is not recogizing it.

grep MEDIA .config
CONFIG_MEDIA_SUPPORT=y
CONFIG_MEDIA_CAMERA_SUPPORT=y
# CONFIG_MEDIA_ANALOG_TV_SUPPORT is not set
# CONFIG_MEDIA_DIGITAL_TV_SUPPORT is not set
# CONFIG_MEDIA_RADIO_SUPPORT is not set
# CONFIG_MEDIA_RC_SUPPORT is not set
# CONFIG_MEDIA_CONTROLLER is not set
CONFIG_MEDIA_USB_SUPPORT=y
# CONFIG_MEDIA_PCI_SUPPORT is not set
CONFIG_MEDIA_SUBDRV_AUTOSELECT=y
CONFIG_SND_HDA_CODEC_CMEDIA=y
# CONFIG_STAGING_MEDIA is not set

What other setting did I miss?

-- 
Joseph

Re: [gentoo-user] webcam on Gentoo Logitech C270

[meino.cramer]

Joseph <syscon780@gmail.com> [14-12-21 19:24]:
> On 12/21/14 18:56, meino.cramer@gmx.de wrote:
> >wabenbau@gmail.com <wabenbau@gmail.com> [14-12-21 18:36]:
> >>Am Sonntag, 21.12.2014 um 10:00
> >>schrieb Joseph <syscon780@gmail.com>:
> >>
> >>> On 12/21/14 09:51, Joseph wrote:
> >>> >I have a Logitech C270 webcam but I can not make it to work with
> >>> >linux/skype
> >>> >
> >>> >USB sound in kernel is ON:
> >>> >CONFIG_SND_USB_AUDIO=y
> >>
> >>I guess you should also take a look at
> >>Device Drivers > Multimedia support > Media USB Adapters
> >>
> >>e.g.
> >>MEDIA_USB_SUPPORT
> >>MEDIA_CAMERA_SUPPORT
> >>MEDIA_CONTROLLER
> >>...
> >>
> >>Regards
> >>wabe
> >>
> >
> >You need UVC-Support:
> >CONFIG_USB_F_UVC=y
> 
> I'm using kernle: linux-3.10.7
> but there is no CONFIG_USB_F_UVC setting, I can not find anything for 
> UVC
> 
> grep UVC .config
> I get empty line.
> 
> -- 
> Joseph
> 

Hi Joseph,

Ooops...I am using 3.18.1 vanilla here.
 
Derek Molloy runs this camera on a beaglebone black
(an ambedded Linux system)...
Forget the part regarding the Beaglebone Black,
but Linux is Linux is Linux is Linux :)
Therefore the hints on kernel configuration
items should be hopefully usable for you.
His webpage is here:
http://derekmolloy.ie/tag/c920/
May be this is of interest for you too:
http://www.oz9aec.net/index.php/gstreamer/473-using-the-logitech-c920-webcam-with-gstreamer
http://forum.ubuntuusers.de/topic/logitech-c920-webcam/
*** This links were presented to you by Google ***
;)

HTH!
Best 
Meino

Re: [gentoo-user] webcam on Gentoo Logitech C270

[Joseph]

On 12/21/14 11:22, Joseph wrote:
>On 12/21/14 18:56, meino.cramer@gmx.de wrote:
>>wabenbau@gmail.com <wabenbau@gmail.com> [14-12-21 18:36]:
>>> Am Sonntag, 21.12.2014 um 10:00
>>> schrieb Joseph <syscon780@gmail.com>:
>>>
>>> > On 12/21/14 09:51, Joseph wrote:
>>> > >I have a Logitech C270 webcam but I can not make it to work with
>>> > >linux/skype
>>> > >
>>> > >USB sound in kernel is ON:
>>> > >CONFIG_SND_USB_AUDIO=y
>>>
>>> I guess you should also take a look at
>>> Device Drivers > Multimedia support > Media USB Adapters
>>>
>>> e.g.
>>> MEDIA_USB_SUPPORT
>>> MEDIA_CAMERA_SUPPORT
>>> MEDIA_CONTROLLER
>>> ...
>>>
>>> Regards
>>> wabe
>>>
>>
>>You need UVC-Support:
>>CONFIG_USB_F_UVC=y
>
>I'm using kernle: linux-3.10.7
>but there is no CONFIG_USB_F_UVC setting, I can not find anything for UVC
>
>grep UVC .config
>I get empty line.

I have fond setting in kernel 3.10 for UVC

grep USB_VIDEO_CLASS .config
CONFIG_USB_VIDEO_CLASS=y         (USB Video Class (UVC))

but I still don't see the USB camera in skype.

-- 
Joseph

Re: [gentoo-user] webcam on Gentoo Logitech C270

[Alexander Kapshuk]

[-- Attachment #1: Type: text/plain, Size: 1751 bytes --]

On Sun, Dec 21, 2014 at 8:49 PM, Joseph <syscon780@gmail.com> wrote:

> On 12/21/14 11:22, Joseph wrote:
>
>> On 12/21/14 18:56, meino.cramer@gmx.de wrote:
>>
>>> wabenbau@gmail.com <wabenbau@gmail.com> [14-12-21 18:36]:
>>>
>>>> Am Sonntag, 21.12.2014 um 10:00
>>>> schrieb Joseph <syscon780@gmail.com>:
>>>>
>>>> > On 12/21/14 09:51, Joseph wrote:
>>>> > >I have a Logitech C270 webcam but I can not make it to work with
>>>> > >linux/skype
>>>> > >
>>>> > >USB sound in kernel is ON:
>>>> > >CONFIG_SND_USB_AUDIO=y
>>>>
>>>> I guess you should also take a look at
>>>> Device Drivers > Multimedia support > Media USB Adapters
>>>>
>>>> e.g.
>>>> MEDIA_USB_SUPPORT
>>>> MEDIA_CAMERA_SUPPORT
>>>> MEDIA_CONTROLLER
>>>> ...
>>>>
>>>> Regards
>>>> wabe
>>>>
>>>>
>>> You need UVC-Support:
>>> CONFIG_USB_F_UVC=y
>>>
>>
>> I'm using kernle: linux-3.10.7
>> but there is no CONFIG_USB_F_UVC setting, I can not find anything for UVC
>>
>> grep UVC .config
>> I get empty line.
>>
>
> I have fond setting in kernel 3.10 for UVC
>
> grep USB_VIDEO_CLASS .config
> CONFIG_USB_VIDEO_CLASS=y         (USB Video Class (UVC))
>
> but I still don't see the USB camera in skype.
>
> --
> Joseph
>
>
Do you have these enabled and set?

grep '^CONFIG.*V4L' /usr/src/linux/.config
CONFIG_VIDEO_V4L2=m
CONFIG_V4L_PLATFORM_DRIVERS=y

CONFIG_MEDIA_SUPPORT=m
CONFIG_USB_VIDEO_CLASS=m
CONFIG_USB_VIDEO_CLASS_INPUT_EVDEV=y
CONFIG_USB_GSPCA=m
CONFIG_MEDIA_PCI_SUPPORT=y

grep -s ^LD_PRELOAD .*
.bash_profile:LD_PRELOAD=/usr/lib/libv4l/v4l2convert.so

Also, you may want to try plugging you webcam into a USB2 port, if
available, instead of a USB3 one, as suggested here,
http://linux-kernel.2935.n7.nabble.com/3-15-8-USB-issue-with-uvc-cam-td920378.html
.

Hope this helps.

[-- Attachment #2: Type: text/html, Size: 3172 bytes --]

Re: [gentoo-user] webcam on Gentoo Logitech C270

[Joseph]

On 12/21/14 22:08, Alexander Kapshuk wrote:
>
>   Do you have these enabled and set?
>   grep '^CONFIG.*V4L' /usr/src/linux/.config
>   CONFIG_VIDEO_V4L2=m
>   CONFIG_V4L_PLATFORM_DRIVERS=y
>   CONFIG_MEDIA_SUPPORT=m
>   CONFIG_USB_VIDEO_CLASS=m
>   CONFIG_USB_VIDEO_CLASS_INPUT_EVDEV=y
>   CONFIG_USB_GSPCA=m
>   CONFIG_MEDIA_PCI_SUPPORT=y
>   grep -s ^LD_PRELOAD .*
>   .bash_profile:LD_PRELOAD=/usr/lib/libv4l/v4l2convert.so
>   Also, you may want to try plugging you webcam into a USB2 port, if
>   available, instead of a USB3 one, as suggested here,
>   [6]http://linux-kernel.2935.n7.nabble.com/3-15-8-USB-issue-with-uvc-cam
>   -td920378.html.
>   Hope this helps.
>
>References
>
>   1. mailto:syscon780@gmail.com
>   2. mailto:meino.cramer@gmx.de
>   3. mailto:wabenbau@gmail.com
>   4. mailto:wabenbau@gmail.com
>   5. mailto:syscon780@gmail.com
>   6. http://linux-kernel.2935.n7.nabble.com/3-15-8-USB-issue-with-uvc-cam-td920378.html

I just did:

grep '^CONFIG.*V4L' /usr/src/linux/.config
CONFIG_VIDEO_V4L2=y
CONFIG_V4L_PLATFORM_DRIVERS=y

CONFIG_MEDIA_SUPPORT=y
CONFIG_USB_VIDEO_CLASS=y
CONFIG_USB_VIDEO_CLASS_INPUT_EVDEV=y
CONFIG_USB_GSPCA=m  
I think there is no need to enable the above: CONFIG_USB_GSPCA=m since nome of the dirvr are enabled as module.

CONFIG_MEDIA_PCI_SUPPORT=y

I run as user:
LD_PRELOAD=/usr/lib/libv4l/v4l2convert.so

Yes, USB web-cam is plugged to USB2
But still skype does not recogines it :-(

-- 
Joseph

Re: [gentoo-user] webcam on Gentoo Logitech C270

[Joseph]

On 12/21/14 22:08, Alexander Kapshuk wrote:
>   grep '^CONFIG.*V4L' /usr/src/linux/.config
>   CONFIG_VIDEO_V4L2=m
>   CONFIG_V4L_PLATFORM_DRIVERS=y
>   CONFIG_MEDIA_SUPPORT=m
>   CONFIG_USB_VIDEO_CLASS=m
>   CONFIG_USB_VIDEO_CLASS_INPUT_EVDEV=y
>   CONFIG_USB_GSPCA=m
>   CONFIG_MEDIA_PCI_SUPPORT=y
>   grep -s ^LD_PRELOAD .*
>   .bash_profile:LD_PRELOAD=/usr/lib/libv4l/v4l2convert.so
>   Also, you may want to try plugging you webcam into a USB2 port, if
>   available, instead of a USB3 one, as suggested here,
>   [6]http://linux-kernel.2935.n7.nabble.com/3-15-8-USB-issue-with-uvc-cam
>   -td920378.html.
>   Hope this helps.

When I try to run: guvcview

I get:
guvcview 1.6.1
ALSA lib /var/tmp/portage/media-libs/alsa-lib-1.0.28/work/alsa-lib-1.0.28/src/pcm/pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.rear
ALSA lib /var/tmp/portage/media-libs/alsa-lib-1.0.28/work/alsa-lib-1.0.28/src/pcm/pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.center_lfe
ALSA lib /var/tmp/portage/media-libs/alsa-lib-1.0.28/work/alsa-lib-1.0.28/src/pcm/pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.side
ALSA lib /var/tmp/portage/media-libs/alsa-lib-1.0.28/work/alsa-lib-1.0.28/src/pcm/pcm_route.c:947:(find_matching_chmap) Found no matching channel map
video device: /dev/video0 
ERROR opening V4L2 interface for /dev/video0
unable to detect video devices on your system (0)
ERROR opening V4L interface: Permission denied
Init video returned -1
VIDIOC_REQBUFS - Failed to delete buffers: Inappropriate ioctl for device (errno 25)
cleaned allocations - 100%
Closing portaudio ...OK

-- 
Joseph

Re: [gentoo-user] webcam on Gentoo Logitech C270

[meino.cramer]

Joseph <syscon780@gmail.com> [14-12-22 03:52]:
> On 12/21/14 22:08, Alexander Kapshuk wrote:
> >  grep '^CONFIG.*V4L' /usr/src/linux/.config
> >  CONFIG_VIDEO_V4L2=m
> >  CONFIG_V4L_PLATFORM_DRIVERS=y
> >  CONFIG_MEDIA_SUPPORT=m
> >  CONFIG_USB_VIDEO_CLASS=m
> >  CONFIG_USB_VIDEO_CLASS_INPUT_EVDEV=y
> >  CONFIG_USB_GSPCA=m
> >  CONFIG_MEDIA_PCI_SUPPORT=y
> >  grep -s ^LD_PRELOAD .*
> >  .bash_profile:LD_PRELOAD=/usr/lib/libv4l/v4l2convert.so
> >  Also, you may want to try plugging you webcam into a USB2 port, if
> >  available, instead of a USB3 one, as suggested here,
> >  
> >[6]http://linux-kernel.2935.n7.nabble.com/3-15-8-USB-issue-with-uvc-cam
> >  -td920378.html.
> >  Hope this helps.
> 
> When I try to run: guvcview
> 
> I get:
> guvcview 1.6.1
> ALSA lib 
> /var/tmp/portage/media-libs/alsa-lib-1.0.28/work/alsa-lib-1.0.28/src/pcm/pcm.c:2239:(snd_pcm_open_noupdate) 
> Unknown PCM cards.pcm.rear
> ALSA lib 
> /var/tmp/portage/media-libs/alsa-lib-1.0.28/work/alsa-lib-1.0.28/src/pcm/pcm.c:2239:(snd_pcm_open_noupdate) 
> Unknown PCM cards.pcm.center_lfe
> ALSA lib 
> /var/tmp/portage/media-libs/alsa-lib-1.0.28/work/alsa-lib-1.0.28/src/pcm/pcm.c:2239:(snd_pcm_open_noupdate) 
> Unknown PCM cards.pcm.side
> ALSA lib 
> /var/tmp/portage/media-libs/alsa-lib-1.0.28/work/alsa-lib-1.0.28/src/pcm/pcm_route.c:947:(find_matching_chmap) 
> Found no matching channel map
> video device: /dev/video0 ERROR opening V4L2 interface for /dev/video0
> unable to detect video devices on your system (0)
> ERROR opening V4L interface: Permission denied
> Init video returned -1
> VIDIOC_REQBUFS - Failed to delete buffers: Inappropriate ioctl for 
> device (errno 25)
> cleaned allocations - 100%
> Closing portaudio ...OK
> 
> -- 
> Joseph
> 

Hi Joseph,

in conjucntion with the C920 I found that guvcview does not plai well
with it.

First try to get anything from your webcam, before trying Skype or
such - so you have to fight against too many "open ends" or failure
sources.

Do you have gstreamer installed?

Try this command/shell script:
You have to adopt the device options to you setup.
It will record and display the video stream.

#! /bin/zsh
td=`date +%Y-%m-%d-%Hh%Mh%Ss`
fn=c920-$td.mp4  
gst-launch-1.0 v4l2src device=/dev/video1 ! video/x-h264,width=1920,height=1080,framerate=30/1 ! h264parse ! muxout. alsasrc device="hw:3,0" ! queue ! audioconvert ! lamemp3enc ! muxout. matroskamux name=muxout streamable=true ! filesink location=$fn &
mplayer $fn &

HTH!
Best regards,
Meino

Re: [gentoo-user] webcam on Gentoo Logitech C270

[Joseph]

On 12/22/14 04:00, meino.cramer@gmx.de wrote:
>Joseph <syscon780@gmail.com> [14-12-22 03:52]:
>> On 12/21/14 22:08, Alexander Kapshuk wrote:
>> >  grep '^CONFIG.*V4L' /usr/src/linux/.config
>> >  CONFIG_VIDEO_V4L2=m
>> >  CONFIG_V4L_PLATFORM_DRIVERS=y
>> >  CONFIG_MEDIA_SUPPORT=m
>> >  CONFIG_USB_VIDEO_CLASS=m
>> >  CONFIG_USB_VIDEO_CLASS_INPUT_EVDEV=y
>> >  CONFIG_USB_GSPCA=m
>> >  CONFIG_MEDIA_PCI_SUPPORT=y
>> >  grep -s ^LD_PRELOAD .*
>> >  .bash_profile:LD_PRELOAD=/usr/lib/libv4l/v4l2convert.so
>> >  Also, you may want to try plugging you webcam into a USB2 port, if
>> >  available, instead of a USB3 one, as suggested here,
>> >
>> >[6]http://linux-kernel.2935.n7.nabble.com/3-15-8-USB-issue-with-uvc-cam
>> >  -td920378.html.
>> >  Hope this helps.
>>
>> When I try to run: guvcview
>>
>> I get:
>> guvcview 1.6.1
>> ALSA lib
>> /var/tmp/portage/media-libs/alsa-lib-1.0.28/work/alsa-lib-1.0.28/src/pcm/pcm.c:2239:(snd_pcm_open_noupdate)
>> Unknown PCM cards.pcm.rear
>> ALSA lib
>> /var/tmp/portage/media-libs/alsa-lib-1.0.28/work/alsa-lib-1.0.28/src/pcm/pcm.c:2239:(snd_pcm_open_noupdate)
>> Unknown PCM cards.pcm.center_lfe
>> ALSA lib
>> /var/tmp/portage/media-libs/alsa-lib-1.0.28/work/alsa-lib-1.0.28/src/pcm/pcm.c:2239:(snd_pcm_open_noupdate)
>> Unknown PCM cards.pcm.side
>> ALSA lib
>> /var/tmp/portage/media-libs/alsa-lib-1.0.28/work/alsa-lib-1.0.28/src/pcm/pcm_route.c:947:(find_matching_chmap)
>> Found no matching channel map
>> video device: /dev/video0 ERROR opening V4L2 interface for /dev/video0
>> unable to detect video devices on your system (0)
>> ERROR opening V4L interface: Permission denied
>> Init video returned -1
>> VIDIOC_REQBUFS - Failed to delete buffers: Inappropriate ioctl for
>> device (errno 25)
>> cleaned allocations - 100%
>> Closing portaudio ...OK
>>
>> --
>> Joseph
>>
>
>Hi Joseph,
>
>in conjucntion with the C920 I found that guvcview does not plai well
>with it.
>
>First try to get anything from your webcam, before trying Skype or
>such - so you have to fight against too many "open ends" or failure
>sources.
>
>Do you have gstreamer installed?
>
>Try this command/shell script:
>You have to adopt the device options to you setup.
>It will record and display the video stream.
>
>#! /bin/zsh
>td=`date +%Y-%m-%d-%Hh%Mh%Ss`
>fn=c920-$td.mp4
>gst-launch-1.0 v4l2src device=/dev/video1 ! video/x-h264,width=1920,height=1080,framerate=30/1 ! h264parse ! muxout. alsasrc device="hw:3,0" ! queue ! audioconvert ! lamemp3enc ! muxout. matroskamux name=muxout streamable=true ! filesink location=$fn &
>mplayer $fn &
>
>HTH!
>Best regards,
>Meino

I can get a video when I run "guvcview" with banch of errors:

vid:046d 
pid:0825 
driver:uvcvideo
mapping control for Pan (relative)
UVCIOC_CTRL_MAP - Error: No such file or directory
mapping control for Tilt (relative)
UVCIOC_CTRL_MAP - Error: No such file or directory
mapping control for Pan Reset
UVCIOC_CTRL_MAP - Error: No such file or directory
mapping control for Tilt Reset
UVCIOC_CTRL_MAP - Error: No such file or directory
mapping control for Focus (absolute)
UVCIOC_CTRL_MAP - Error: No such file or directory
mapping control for LED1 Mode
UVCIOC_CTRL_MAP - Error: No such file or directory
mapping control for LED1 Frequency
UVCIOC_CTRL_MAP - Error: No such file or directory
mapping control for Disable video processing
UVCIOC_CTRL_MAP - Error: No such file or directory
mapping control for Raw bits per pixel
UVCIOC_CTRL_MAP - Error: No such file or directory
mapping control for Off
UVCIOC_CTRL_MAP - Error: Inappropriate ioctl for device
checking format: 1196444237
VIDIOC_G_COMP:: Inappropriate ioctl for device
fps is set to 1/25
drawing controls

Checking video mode 640x480@32bpp : OK 
 Could not grab image (select timeout): Resource temporarily unavailable

When I try to record anything bunch of errors messages popping up in command line:

(guvcview:5004): GConf-WARNING **: error creating revert set: Client failed to connect to the D-BUS daemon:
Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout 
expired, or the network connection was broken.

I don't think this web-cam is Linux friendly :-/
Are there any alternative, web-cam that support Linux 100%

-- 
Joseph

Re: [gentoo-user] webcam on Gentoo Logitech C270

[Daniel Frey]

On 12/21/2014 06:49 PM, Joseph wrote:
> When I try to run: guvcview
> 
> video device: /dev/video0 ERROR opening V4L2 interface for /dev/video0
> unable to detect video devices on your system (0)
> ERROR opening V4L interface: Permission denied

It can't open the device. You probably aren't in the right group for access.

I suspect it'd be the video group, just do:

ls -lhd /dev/video0

...and see what the permissions are, it's probably going to be root:video.

For my mythtv card, I know for sure it's root:video.

If that's all it is, use gpasswd and add yourself to the group then log
out and in again.

Dan

Re: [gentoo-user] webcam on Gentoo Logitech C270 - almost there.

[Joseph]

On 12/21/14 19:58, Daniel Frey wrote:
>On 12/21/2014 06:49 PM, Joseph wrote:
>> When I try to run: guvcview
>>
>> video device: /dev/video0 ERROR opening V4L2 interface for /dev/video0
>> unable to detect video devices on your system (0)
>> ERROR opening V4L interface: Permission denied
>
>It can't open the device. You probably aren't in the right group for access.
>
>I suspect it'd be the video group, just do:
>
>ls -lhd /dev/video0
>
>...and see what the permissions are, it's probably going to be root:video.
>
>For my mythtv card, I know for sure it's root:video.
>
>If that's all it is, use gpasswd and add yourself to the group then log
>out and in again.
>
>Dan

YES, that was it.  I was fighting with it all afternoon and it was so simple :-/

Though, the video and voice work with guvcview and can record it and save it but with skype only video works.
I think the problem is "pulse" audio, skype only show "pulse" audio option; guvcview allow me to switch to: 
USB Device 0x46d:0x825 Audio.

How to force skype to USB Device Audio?

-- 
Joseph