NAME

       epinfo - extract technical information from digital camera generated files

SYNOPSIS

       epinfo [-h] [-V] [-z] [-r] [-t] [-f fmt] [-T <TagName>] <filename> ...

DESCRIPTION

       This  command  extracts  the  contents  of  TIFF directory of Exif files or APP12 marker from JFIF files,
       parses it and optionally finds specific data inside it.  If used without -T, -r and -t options, dumps the
       complete block data in human readable format.  With -r and -t options, renames and changes  timestamp  of
       the files.

OPTIONS

       -h   This option produces a help screen of all options and commands.

       -V   This option prints software revision information.

       -z   This  option  sets  no  time-zone  processing mode.  Use this option if the camera's clock is set up
            shifted by the local timezone offset (as it is when you set it manually to the local time).

       -r   Rename files, generating new name based on the time of snapshot and -f option value.

       -t   Set timestamp of the files to the time of snapshots.

       -f timeformat
            This option permits specifying the format for automatically generated image file names; the value is
            used as the format string for strftime(3) function.  By default, names of the format  "MMDD_NNN.jpg"
            are  generated,  where  MM  is  a  month, DD is a day, and NNN is a count starting from 001.  A good
            starting point for the timeformat value could be  "%Y_%m_%d-%H_%M_%S.jpg".   If  the  format  string
            contains  context  "%%XXXd"  where  XXX are digits, it is taken for the count, i.e. if the file with
            such name is present, next count is tried.  If the format string does not contain "%%XXXd" part, the
            count field, if necessary, is appended at the end of the name.

            A few single-character formats are used as shortcuts.  "x" makes the name of seconds since the epoch
            in hexadecimal format (8 characters + ".jpg"), "d" - the same in decimal format (10 characters), "1"
            stands for default format  "%m%d_%%03d.jpg",  "2"  stands  for  "%y%m%d%%02d.jpg",  "3"  stands  for
            "%Y_%m_%d-%H_%M_%S.jpg"  and  4  stands for "%Y/%m/%d/%H_%M_%S.jpg".  The program attempts to create
            intermediate directories is necessary (and possible).

       -T <TagName>
            Output the value of this keyword in the information block.  Note that keywords are  case  sensitive.
            TagName DateTime has special meaning: if the file is Exif, it just prints the value of DateTime tag,
            and  if  the  format  is  old APP12, it outputs the value of TimeDate tag in the same format as Exif
            DateTime.

ARGUMENTS

       <filename> ...
            List of filenames to process.

EXAMPLES

       % epinfo -f3 -rt pic00001.jpg

       % epinfo -T FNumber 0512_003.jpg

OTHER NOTES

       The latest version of this tool can be found at http://photopc.sourceforge.net/

       Trademarks are properties of their respective owners.

COPYRIGHT

       The program is copyrighted by Eugene G. Crosser  <crosser@average.org>  and  freely  distributable.   See
       README file for details.

SEE ALSO

       photopc(1)

PhotoPC manipulation tool                          24 May 1997                                         EPINFO(1)