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       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.

       (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.


       -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


       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

         dv4l -s 635x360

       dv4l will do the scaling.


       dv4l does not support  adjustment  of  color,  brightness  and  similar

       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.