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
