Provided by: vgrabbj_0.9.6-5build1_i386 bug


       vgrabbj.conf - configuration file for vgrabbj


       vgrabbj purpose is to read data from a v4l-device and put it in a file,
       formatted as jpeg, png, or pnm. Except for  the  ftp-options  described
       below  everything  can  also  handled  on  the  commandline.   Here the
       configuration statements are described.

       Syntax is <keyword> <value>. Comments start with a ';'  or  '#'.  Those
       lines  are  ignored  by vgrabbj. Case of the keywords and named options
       doesn't matter except for the timestamp option as well as any filename.

       The configuration file is parsed line by line. If any  keyword  appears
       twice or more often, the last one is the one used.

       On  startup,  the  pre-defined  configuration file /etc/vgrabbj.conf is
       read. Then, commandline parameters are evaluated one by one,  the  last
       is  the most significant, if one option is provide twice or more often.
       Same applies for the commandline parameter -c <config-file>.


       DaemonSeconds seconds
              Daemonize & loop with seconds intervals (min. 1).

       Daemon microseconds
              Daemonize & loop microseconds intervals (min.  1).  Same  as  -l
              except you can control it more precisely.

       AutoBrightness On|Off
              Defines  if vgrabbj's brightness adjustment is used. This option
              works only if the device supports data fetch via read and  RGB24
              videopalette.  See ForcePalette on how-to set RGB24. Some device
              do not support RGB24, hence, Brightness is ignored.

       ImageQuality quality
              Sets the quality of a jpeg output to  quality  (1-100,  default:

       ImageSize imagesize
              Sets the imagesize of input device, where imagesize is one of:

               sqcif= 128x96,     qsif = 160x120,
               qcif = 176x144,    sif  = 320x240,
               cif  = 352x288,    vga  = 640x480,
               svga = 800x600,    xga  = 1024x768,
               sxga = 1280x1024,  uxga = 1600x1200,

              (default: cif)

       ImageWidth width
              Sets  the width of the image to width. Needs -H.  The v4l-device
              has to support the image width you set with this option.

       ImageHeight height
              Sets the height of the image to  height.  Needs  -w.   The  v4l-
              device has to support the image height you set with this option.

       OutputFormat format
              Sets  the  output  to format (either jpeg, png, or pnm, default:
              jpeg). Alternative, you may provide jpg for jpeg.

       OutputFile <filename>
              Output is written to filename (default: /dev/stdout)

       Archive <path/filename>
              Additional output is  written  to  path/filename  (default:  not
              set),   whereas  the  path-filename  can  include  any  strftime
              component. The  path-  filename  must  not  be  on  a  different
              filesystem  as the output defined above.  Additionally, you need
              to take care of the number of files stored. There  is  no  upper
              ceiling for archiving.

       VideoDevice <device>
              Sets the input device to device (default: /dev/video)

       OpenOnce On|Off
              Defines  if  vgrabbj  opens  the device only while image data is
              grabbed (Off) or keeps it  opened  while  it  is  running  (On).
              Setting  it  to  Off is helpful if you need access to the device
              besides vgrabbj. This use is discouraged though, due to possible
              problems with memory fragmentation. Default is On.

       SetImageSize On|Off
              Defines  if the image size (see -i, -H, and -w) of the device is
              set by vgrabbj. Necessary for certain v4l-devices which  do  not
              support  to be set to a particular image size (e.g. IBM-usb-cam,
              QuickCam).  For these devices you have to specify  the  size  at
              module load time.  Default is On.

       SwitchColor On|Off
              Switches  colormap from BGR to RGB (or vice versa) if set to On.
              Default is Off. Use if you have odd colors.

       SwapRL On|Off
              Swaps left and right of the image like a mirror.  Default:  Off.
              is Off.

       SwapTB On|Off
              Swaps  top  and bottom of the image like a mirror. Default: Off.
              is Off.

       NoUseMmap On|Off
              Turns off the use of  mmap'ed  (better)  memory  allocation  for
              grabbing  frames.   Some  (very  rare)  cams  cannot use mmap'ed
              memory and have to use read. If you want to switch  easily,  use
              this  switch. If you don't know what I'm talking about, leafe it
              like it is: Default is Off.

       DebugLevel value
              Sets the loglevel of vgrabbj. Valid for value are 0, 2, 3, 4, 6,
              7  (default:  4).  0 means no messages at all, 7 is debug. Don't
              use 7 if you are running vgrabbj in daemon  mode,  it'll  surely
              fill  your syslog.  Be aware, that loglevel 7 will also post you
              ftp-password (if defined) in the logfile!

       UseTmpOut On|Off
              Sets the use of the temporary outputfile. Default is On. Ignored
              in case the default output (/dev/stdout) is used. If set to Off,
              the data is written directly to the file defined by OutputFile.

              If  filename  is  different  from  /dev/stdout  (given  via   -f
              parameter  or  OutputFile,  vgrabbj  defaults to use a temporary
              file called filename.tmp to write the image. This file  is  then
              renamed  to filename to shorten the time period corrupt data may
              be read from filename.

       ForcePalette palette
              Force the usage of the specified  palette.  If  palette  is  not
              supported  by  either  vgrabbj  or the v4l-device, fallback to a
              palette supported by both is provided. If no common  denominator
              is  available, vgrabbj exits. Supported palettes are marked with
              * below. Possible values are (copy from videodev.h):

               1  VIDEO_PALETTE_GREY      Linear greyscale
               2  VIDEO_PALETTE_HI240     High 240 cube (BT848)
               3  VIDEO_PALETTE_RGB565    565 16 bit RGB
               4 *VIDEO_PALETTE_RGB24     24bit RGB
               5 *VIDEO_PALETTE_RGB32     32bit RGB
               6  VIDEO_PALETTE_RGB555    555 15bit RGB
               7 *VIDEO_PALETTE_YUV422    YUV422 capture
               8 *VIDEO_PALETTE_YUYV
               9  VIDEO_PALETTE_UYVY
               10 VIDEO_PALETTE_YUV411    YUV411 capture
               11 VIDEO_PALETTE_RAW       RAW capture (BT848)
               12 VIDEO_PALETTE_YUV422P   YUV 4:2:2 Planar
               13 VIDEO_PALETTE_YUV411P   YUV 4:1:1 Planar
               14*VIDEO_PALETTE_YUV420P   YUV 4:2:0 Planar
               15 VIDEO_PALETTE_YUV410P   YUV 4:1:0 Planar
               16 VIDEO_PALETTE_PLANAR

              (no default, depends on v4l-device).

       DiscardFrames value
              value images are grabbed and  immediately  discarded.  Only  the
              last  image  is  written to the output. This might be helpful if
              your v4l-device needs to take a couple of images to  auto-adjust
              to the current light.


       The  following  options are useful if you want to keep a certain amount
       of images in an archive. Currently, the archive is  only  supported  if
       kept on the same filesystem as the images taken.

       Archive <archive-filename-pattern>
              The archive-filename-pattern is evaluated as a timestring, hence
              the  same  applies  as  to  TimeStamp   (see   below,   default:

       ArchiveEach <value>
              Defines  how  many images have to be taken before a copy is made
              for the archive. E.g. if defined 1, each image  is  put  in  the
              archive; if defined 5 every fifth image is put in the archive.

       ArchiveMax <value>
              Sets the maximum number of images to be put in the archive.


       The  following  options are available only if vgrabbj was compiled with
       the freetype library available. The timestamp will only be  enabled  if
       all values evaluated (inlcuding defaults) lead to a valid configuration
       and UseTimestamp is set to On.

       UseTimestamp On|Off
              This is the essential setting to enable timestamps if defined in
              the  config  file.  Without  this being set to On, it just won't
              work (although, if there are options  set  to  have  an  invalid
              configuration,  it won't work either).  This is different to the
              handling on the commandline.

       FontFile filename
              The  TrueType  font  to  be  used  for  the  timestamp  (default

       FontSize size
              Set the fontsize to size for timestamp (3-100, default: 12).

       TimeStamp format-str
              Defines  the  timestamp.  format-str  can  be  plain text or any
              strftime format. Any '""' at the beginning or the  end  will  be
              eliminated   for   compatibility  reasons,  i.e.  they  are  not
              necessary (default: "%a, %e.  %B %Y - %T" - see strftime(3)  for

       Position value
              Alignment of the timestamp in the image. Possible value:

              ul = upper left,    ur = upper right,
              ll = lower left,    lr = lower right,
              uc = upper center,  lc = lower center

              (default: upper right). You can use either the short or the long

       Blend value
              Defines the blend between  font  background  and  image  (1-100,
              default: 60).

       BorderSize value
              value  pixels will be used as border around the timestamp string
              (1-255, default: 2).


       There are no options for ftp-upload on the command line. This is due to
       the  need  to  provide  a password which would be visible via the ps(1)

       EnableFtp On|Off
              Ftp-Connection will only be opened if set to On. Be  aware  that
              this  might  bring  up a dial-up connection. See also KeepAlive.
              (default: Off)

       RemoteHost hostname
              Host to which a ftp-connection will be established everytime  an
              image   has  been  written  (see  also:  Daemon,  DaemonSeconds,
              KeepAlive, default: camimage.jpg).

       RemoteDir path
              The path consists of the full path on the remote host defined by
              RemoteHost (default: /).

       RemoteImageName filename
              The  filename  consists  of  the  full  path and filename on the
              remote host defined by RemoteHost (default:

       Username username
              The name of the user to log on the remote  ftp-server  (default:

       Password password
              The  password  of  the  user  to  log  on  the remote ftp-server
              (default: bar). Be aware, that the password is kept  unencrypted
              in memory, it might be read by others.

       KeepAlive On|Off
              If  set  to  On,  the connection will be kept. This will cause a
              dial-up line to be up all the time, which in turn may cost a lot
              of  money!  If  set  to  Off, the connection will be established
              after  an  image  was   written   to   the   OutputFile.   After
              transmission,  the  ftp-connection will be ended.  This may also
              result  in  phone   charges,   for   which   Author   takes   no
              responsibility. See License.

       Passive On|Off
              If set to On, passive ftp will be used. This can help connecting
              to ftp servers from the inside of a NAT-ed network.

       TryHarder On|Off
              Not implemented, yet.


       With the following options you may alter the settings of your  hardware
       (the  cam),  if  supported  by the cam. Be aware, this might break your
       hardware, as there are no checks if  the  values  supplied  are  valid,
       allowed, or supported!

       -W <value>
              Whiteness definition.

       -r <value>
              Color definition.

       -x <value>
              Contrast definition.

       -b <value>
              Brightness definition.

       -u <value>
              Hue definition.


       At  my own machine running vgrabbj, the %F in a Archive-Filename causes
       memory corruption.  This is not validated  by  any  other  machine.  No
       further bugs are known at this time.


       vgrabbj(1), strftime(3), ps(1)


       This   manual   page   was   originally   written  by  Michael  Janssen
       <>, for the Debian GNU/Linux system and enhanced  by
       Jens Gecius <>.

                              February  24, 2002               VGRABBJ.CONF(5)