On Fri, 13 Dec 2024 23:54:31 +0100, Stefan Hagen <sh+openbsd-m...@codevoid.de> wrote: > > Webcam: > > In theory the webcam is supported and responsive: > > $ ffplay -f v4l2 -list_formats all -i /dev/video0 > [video4linux2,v4l2 @ 0x854a377c400] Compressed: mjpeg : > MJPEG : 1280x720 640x360 640x480 848x480 960x540 1920x1080 2560x1440 2592x1944 > [video4linux2,v4l2 @ 0x854a377c400] Raw : yuyv422 : > YUYV : 640x480 640x360 > > In practice neither mpv, not ffmpeg/ffplay can play the mjpeg or yuyv422 > stream: > > $ ffplay -f v4l2 -i /dev/video0 > [ webcam turns on, it takes a few seconds ] > [video4linux2,v4l2 @ 0xfc8c9cab400] ioctl(VIDIOC_DQBUF): Invalid argument > Input #0, video4linux2,v4l2, from '/dev/video0': > Duration: N/A, bitrate: 147456 kb/s > Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 640x480, 147456 > kb/s, 30 fps, 30 tbr, 1000k tbn > [video4linux2,v4l2 @ 0xfc8c9cab400] ioctl(VIDIOC_DQBUF): Invalid argument > [video4linux2,v4l2 @ 0xfc8c9cab400] ioctl(VIDIOC_DQBUF): Invalid argument > [video4linux2,v4l2 @ 0xfc8c9cab400] ioctl(VIDIOC_DQBUF): Invalid argument > ... > > I assume the webcam is not sending a standard format / or our video4linux2 is > too old. >
I had commited to uvideo.c some fixes which allows me to fix 2 of webcam which I had access, and which had similar errors. May I ask you which version of uvideo.c you have in your kernel? Is it v1.227? -- wbr, Kirill
