NAME

       dv4l - make a dv1394 camcorder available for video4linux programs

SYNOPSIS

       dv4l [options]

       options (shortest form): [-cdrsvh]

DESCRIPTION

       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.

OPTIONS

       -c, --color-correction
              Set this option if red objects look blue.

       -d, --device device-name
              Use device-name as vloopback input device. If this option  is  omitted,  dv4l  will
              automatically look for an appropriate device.

       -r, --rgb-only
              Set  this  option  to prevent V4L applications from choosing YUV palettes. Try this
              option if you get low frame rates.

       -s, --size WxH
              Set capture size and use slower copy mode, only required for some V4L applications.
              When using this option, V4L applications can't change the capture size.

       -v, --verbose level
              Set the amount of debugging messages. A level of 0 means no output at all, 1 is the
              default, 3 enables all messages.

       -h, --help
              displays a help message

EXAMPLES

       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.

LIMITATIONS

       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.

SEE ALSO

       dv4lstart(1)

                                                                                          DV4L(1)