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keet
Guru
Joined: 09 Sep 2008
Posts: 574
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 Posted: Mon Dec 29, 2008 5:08 pm Post subject: [solved, more questions] Problem: Webcam, AMD64, and Skype |
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Here is my situation: I was using kernel 2.6.26-r4, in which everything ran fine. I upgraded to kernel 2.6.27-r7, and now my webcam won't work properly. My system is AMD64. lsusb tells me that my webcam is this:
Bus 002 Device 005: ID 046d:08da Logitech, Inc. QuickCam Messanger
Apart from the question of what a 'Messanger' is (maybe it's what happens when someone has a messy fit?), I'm having trouble making it work. Running spcaview just gives me green lines at the top of the window. Skype crashes when I try to test my webcam. Kopete shows a bunch of white lines in the image on a black background. If I run one of these two:
| Code: |
LD_PRELOAD=/usr/lib64/libv4l/v4l1compat.so spcaview
LD_PRELOAD=/usr/lib64/libv4l/v4l1compat.so kopete
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Then my webcam actually works properly. However, running "LD_PRELOAD=/usr/lib64/libv4l/v4l1compat.so skype" returns this: "ERROR: ld.so: object '/usr/lib64/libv4l/v4l1compat.so' from LD_PRELOAD cannot be preloaded: ignored." This leads me to believe that it's actually a problem with Skype, but I'm not sure. My webcam worked fine in Skype with kernel 2.6.26-r4. Here are the relevent portions of my kernel configuration:
| Code: |
#
# Multimedia devices
#
#
# Multimedia core support
#
CONFIG_VIDEO_DEV=y
CONFIG_VIDEO_V4L2_COMMON=y
CONFIG_VIDEO_ALLOW_V4L1=y
CONFIG_VIDEO_V4L1_COMPAT=y
# CONFIG_DVB_CORE is not set
CONFIG_VIDEO_MEDIA=y
#
# Multimedia drivers
#
# CONFIG_MEDIA_ATTACH is not set
CONFIG_MEDIA_TUNER=y
# CONFIG_MEDIA_TUNER_CUSTOMIZE is not set
CONFIG_MEDIA_TUNER_SIMPLE=y
CONFIG_MEDIA_TUNER_TDA8290=y
CONFIG_MEDIA_TUNER_TDA9887=y
CONFIG_MEDIA_TUNER_TEA5761=y
CONFIG_MEDIA_TUNER_TEA5767=y
CONFIG_MEDIA_TUNER_MT20XX=y
CONFIG_MEDIA_TUNER_XC2028=y
CONFIG_MEDIA_TUNER_XC5000=y
CONFIG_VIDEO_V4L2=y
CONFIG_VIDEO_V4L1=y
CONFIG_VIDEO_CAPTURE_DRIVERS=y
# CONFIG_VIDEO_ADV_DEBUG is not set
CONFIG_VIDEO_HELPER_CHIPS_AUTO=y
# CONFIG_VIDEO_VIVI is not set
# CONFIG_VIDEO_BT848 is not set
# CONFIG_VIDEO_CPIA is not set
# CONFIG_VIDEO_CPIA2 is not set
# CONFIG_VIDEO_SAA5246A is not set
# CONFIG_VIDEO_SAA5249 is not set
# CONFIG_TUNER_3036 is not set
# CONFIG_VIDEO_STRADIS is not set
# CONFIG_VIDEO_SAA7134 is not set
# CONFIG_VIDEO_MXB is not set
# CONFIG_VIDEO_DPC is not set
# CONFIG_VIDEO_HEXIUM_ORION is not set
# CONFIG_VIDEO_HEXIUM_GEMINI is not set
# CONFIG_VIDEO_CX88 is not set
# CONFIG_VIDEO_IVTV is not set
# CONFIG_VIDEO_CAFE_CCIC is not set
CONFIG_V4L_USB_DRIVERS=y
CONFIG_USB_VIDEO_CLASS=y
CONFIG_USB_VIDEO_CLASS_INPUT_EVDEV=y
CONFIG_USB_GSPCA=y
# CONFIG_VIDEO_PVRUSB2 is not set
# CONFIG_VIDEO_EM28XX is not set
# CONFIG_VIDEO_USBVISION is not set
CONFIG_VIDEO_USBVIDEO=y
# CONFIG_USB_VICAM is not set
# CONFIG_USB_IBMCAM is not set
# CONFIG_USB_KONICAWC is not set
CONFIG_USB_QUICKCAM_MESSENGER=y
# CONFIG_USB_ET61X251 is not set
# CONFIG_VIDEO_OVCAMCHIP is not set
# CONFIG_USB_W9968CF is not set
# CONFIG_USB_OV511 is not set
# CONFIG_USB_SE401 is not set
# CONFIG_USB_SN9C102 is not set
# CONFIG_USB_STV680 is not set
# CONFIG_USB_ZC0301 is not set
# CONFIG_USB_PWC is not set
# CONFIG_USB_ZR364XX is not set
# CONFIG_USB_STKWEBCAM is not set
# CONFIG_USB_S2255 is not set
# CONFIG_SOC_CAMERA is not set
# CONFIG_VIDEO_SH_MOBILE_CEU is not set
# CONFIG_RADIO_ADAPTERS is not set
# CONFIG_DAB is not set
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Thanks for your help.
Last edited by keet on Sun Jan 11, 2009 4:59 pm; edited 1 time in total |
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Kollin
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Joined: 25 Feb 2006
Posts: 1139
Location: Sofia/Bulgaria
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| Posted: Sun Jan 04, 2009 10:01 pm Post subject: |
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Same with my logitech stx cam 
_________________
"Dear Enemy: may the Lord hate you and all your kind, may you be turned orange in hue, and may your head fall off at an awkward moment."
"Linux is like a wigwam - no windows, no gates, apache inside..." |
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alet_roux
n00b
Joined: 12 Oct 2004
Posts: 54
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| Posted: Thu Jan 08, 2009 6:46 pm Post subject: |
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| Same problem here. |
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keet
Guru
Joined: 09 Sep 2008
Posts: 574
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| Posted: Fri Jan 09, 2009 10:21 pm Post subject: |
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| alet_roux wrote: | | Same problem here. |
Ok, I finally fixed it. It turns out that since I'm using an AMD64 installation, libv4l doesn't install 32-bit libraries. Skype, being 32-bit and closed source, doesn't work with the 64-bit libv4l libraries. Fortunately, Alexandre Rostovtsev posted a modified ebuild of libv4l-0.5.1 on Bugzilla here:
https://bugs.gentoo.org/240090
I copied it to my local overlay, made a digest, keyworded it, and masked higher versions for now. After that, I installed it and modified /usr/bin/skype (it's in the bin directory, but it's actually a script) by adding one line before the end:
| Code: | export LD_PRELOAD=/usr/lib32/libv4l/v4l1compat.so
exec /opt/skype/skype "$@" |
Now my Logitech Quickcam Messenger works in Skype  |
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alet_roux
n00b
Joined: 12 Oct 2004
Posts: 54
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| Posted: Sat Jan 10, 2009 12:26 pm Post subject: |
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| Thanks Keet, this solves the problem for me. |
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yvchu
n00b
Joined: 10 Jan 2009
Posts: 1
Location: UK
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| Posted: Sat Jan 10, 2009 4:16 pm Post subject: |
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The workaround with
LD_PRELOAD=/usr/lib/libv4l/v4l1compat.so xawtv
does not work for me:
libv4l2: error dequeuing buf: Invalid argument
ioctl: VIDIOC_DQBUF(index=0;type=VIDEO_CAPTURE;bytesused=0;flags=0x0 [];field=ANY;;timecode.type=0;timecode.flags=0;timecode.frames=0;timecode.seconds=0;timecode.minutes=0;timecode.hours=0;timecode.userbits="";sequence=0;memory=unknown): Invalid argument
the kernel driver works fine for a Logitech ID 046d:08d7 webcam, I can use mplayer using v4l2 to get playback.
I've tried both stable 0.5.3 and the latest (0.5.7 ) libv4l - the result is the same.
kernel 2.6.27-gentoo-r7
Any ideas? |
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Kollin
Veteran
Joined: 25 Feb 2006
Posts: 1139
Location: Sofia/Bulgaria
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| Posted: Tue Jan 13, 2009 5:21 pm Post subject: |
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Solved my skype problem on amd64 thank you 
_________________
"Dear Enemy: may the Lord hate you and all your kind, may you be turned orange in hue, and may your head fall off at an awkward moment."
"Linux is like a wigwam - no windows, no gates, apache inside..." |
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Mekoryuk
Apprentice
Joined: 17 Sep 2003
Posts: 174
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| Posted: Tue Feb 02, 2010 1:15 am Post subject: |
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Neither works for me. Kopete refuses to believe a camera exists, even with the LD_PRELOAD; no error messages. Pointing Skype to the lib32 version of libv4l still brings the error that it can't load the library, so it's ignoring it. It's very frustrating. The only way I can get the camera to work is by:
| Code: | | mplayer tv:// -tv driver=v4l:width=352:height=288:outfmt=rgb24:device=/dev/video1:noaudio |
This seems to not be dependent on doing LD_PRELOAD, it's just that the output format has to be very specific. How to pass this information to Skype or Kopete is beyond me. |
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