DV4L(1) | General Commands Manual | DV4L(1) |
dv4l - make a dv1394 camcorder available for video4linux programs
dv4l [options]
options (shortest form): [-cdrsvh]
dv4l enables programs using the video4linux API to access a dv1394 (Firewire) camcorder. It pushes the video stream to an input device provided by the vloopback kernel module.
Before starting dv4l , make sure that the vloopback module is present in the kernel.
See http://www.lavrsen.dk/twiki/bin/view/Motion/VideoFourLinuxLoopbackDevice (without the dash) for information about this kernel module.
Check your 1394 driver config by starting
$ gst-launch-0.10 dv1394src \! dvdemux \! dvdec \! xvimagesink
from your shell. After turning on your camera, a video window should appear. If this works, dv4l should work as well.
Make sure that your camera is on before starting a video4linux program.
In most cases, dv4l can be started without any options. Kopete, however needs the --size option, with a resolution of 320x240:
dv4l -s 320x240
Like kopete, gqcam needs the --size option, but supports arbitrary resolutions:
dv4l -s 635x360
dv4l will do the scaling.
dv4l does not support adjustment of color, brightness and similar parameters.
It supports only RGB24 and YUV420P palettes. Some V4L programs may not work as they require different palettes.
It supports only a single dv1394 camera.
Skype v2.0beta seems to have problems with vloopback and does NOT work with dv4l. Try dv4lstart instead.