Joseph <syscon...@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
