On 2019-08-23, Jan Stary <h...@stare.cz> wrote: > This is current/amd64 on a Dell Latitude E5570 (dmesg below). > I am trying to use a USB camera (bought with a microscope, > to display the miracles of paramecium life on the laptop). > > https://www.bresser.de/en/Astronomy/Accessories/BRESSER-MikrOkular-Full-HD-eyepiece-camera.html > > uvideo1 at uhub0 port 1 configuration 1 interface 0 "Alcor Micro > MikrOkularHD" rev 2.00/0.00 addr 4 > video1 at uvideo1 > > While video(1) works with the laptop's integrated camera (video0), > it doesn't work with this USB camera (video1): > > $ doas video -f /dev/video1 -v > doas (h...@dell.stare.cz) password: > video: /dev/video1 has no usable YUV encodings > > The device itself works, in that "doas cat /dev/video1 > /tmp/video.raw" > spews out data, presumably frames captured by the camera. I can even > play that back with "video -i /tmp/video.raw", but it's garbage, > not being in one of the "YUV encodings". file(1) says > > /tmp/video.raw: JPEG image data, JFIF standard 1.01, > baseline, precision 0, 4360x720 > > so is it some format based on a sequence of jpges? > (Please excuse my video ignorance.)
MJPEG? that's possible. Try some of these: ffplay -f video4linux2 /dev/video0 gst-launch-1.0 v4l2src \! xvimagesink mplayer tv:// mpv tv:// If you want to record, and ffplay works, you should at least be able to use ffmpeg and write a file with a standard container format.
