A lot of the Thinkpad laptops have a physical switch that will cover/uncover the camera. Can you switch it to the other and try again?
-peter On 2023 Oct 07 (Sat) at 12:53:12 +0000 (+0000), Comète wrote: :Hi, : :$ video -f /dev/video0 :video: ioctl VIDIOC_DQBUF: Invalid argument : :the LED lights up near the camera and a black window is displayed... : : :I've strictly followed https://www.openbsd.org/faq/faq13.html#webcam : : :then to answer Crystal: : :$ ffplay -f v4l2 -input_format yuyv422 -video_size 960x540 -i /dev/video0 :ffplay version 4.4.3 Copyright (c) 2003-2022 the FFmpeg developers :built with OpenBSD clang version 13.0.0 :configuration: --enable-shared --arch=amd64 --cc=cc --enable-debug --disable-stripping :--disable-indev=jack --disable-outdev=sdl2 --enable-fontconfig --enable-frei0r --ena :ble-gpl --enable-ladspa --enable-libaom --enable-libass --enable-libdav1d --enable-libfreetype :--enable-libfribidi --enable-libgsm --enable-libmp3lame --enable-libopus --ena :ble-libspeex --enable-libtheora --enable-libv4l2 --enable-libvorbis --enable-libvpx :--enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzimg --en :able-nonfree --enable-openssl --enable-libvidstab --extra-cflags='-I/usr/local/include :-I/usr/X11R6/include' --extra-libs='-L/usr/local/lib -L/usr/X11R6/lib' --extra-ldsofla :gs= --mandir=/usr/local/man --objcc=/usr/bin/false --optflags='-O2 -pipe -g -Wno-redundant-decls' :libavutil 56. 70.100 / 56. 70.100 :libavcodec 58.134.100 / 58.134.100 :libavformat 58. 76.100 / 58. 76.100 :libavdevice 58. 13.100 / 58. 13.100 :libavfilter 7.110.100 / 7.110.100 :libswscale 5. 9.100 / 5. 9.100 :libswresample 3. 9.100 / 3. 9.100 :libpostproc 55. 9.100 / 55. 9.100 :[video4linux2,v4l2 @ 0x68aa563e800] ioctl(VIDIOC_DQBUF): Invalid argument :Input #0, video4linux2,v4l2, from '/dev/video0': :Duration: N/A, bitrate: 124416 kb/s :Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 960x540, 124416 kb/s, 15 fps, 15 tbr, :1000k tbn, 1000k tbc :[video4linux2,v4l2 @ 0x68aa563e800] ioctl(VIDIOC_DQBUF): Invalid argument :[video4linux2,v4l2 @ 0x68aa563e800] ioctl(VIDIOC_DQBUF): Invalid argument :[video4linux2,v4l2 @ 0x68aa563e800] ioctl(VIDIOC_DQBUF): Invalid argument : : :and yes, to answer Jan: : :$ sysctl kern.video :kern.video.record=1 : : : :Thanks a lot for your help. : :Morgan : : :7 octobre 2023 14:36 "Thomas Frohwein" <tfrohw...@fastmail.com> a écrit: : :> On Sat, Oct 07, 2023 at 07:08:21AM -0300, Crystal Kolipe wrote: :> :>> On Sat, Oct 07, 2023 at 08:51:36AM +0000, Comte wrote: :>> The webcam seems well detected but no image is displayed... :>> :>> What happens if you run /usr/X11R6/bin/video instead of using ffmpeg? :>> :>> # dmesg | grep "uvideo" :>> ^^^^^^^^^^^^^ :>> :>> Please post a full dmesg next time. :>> :>> uvideo0 at uhub1 port 4 configuration 1 interface 0 "Chicony Electronics Co.,Ltd. Integrated :>> Camera" rev 2.01/54.20 addr 3 :>> video0 at uvideo0 :>> uvideo1 at uhub1 port 4 configuration 1 interface 2 "Chicony Electronics Co.,Ltd. Integrated :>> Camera" rev 2.01/54.20 addr 3 :>> video1 at uvideo1 :>> :>> However, this camera should almost certainly just work anyway. :>> :>> $ ffplay -f v4l2 -input_format mjpeg -video_size 1280x720 -i /dev/video0 :>> ^^^^^^^^^^^^^^^^^^^ :>> :>> Why? :> :> Looks like Comte followed the console instructions at [1] to the letter. :> It seems to me that jumping right to ffplay recording isn't the best :> way for you to check the camera is working. Simplest way to test seems :> to me: :> :> $ video -f /dev/video0 :> :> And then you should see a window with the video stream... :> :> [1] https://www.openbsd.org/faq/faq13.html#webcam : -- Do you realize how many holes there could be if people would just take the time to take the dirt out of them?
