Re: [opensuse] Photo taken/file creation date advice.

13 Jul 2016


      Thanks Patrick.

On Wednesday, 13 July 2016 08:11:24 BST Patrick Shanahan wrote:
...
* ianseeks  [07-13-16 08:02]:
...
On Wednesday, 13 July 2016 07:55:35 BST Patrick Shanahan wrote:
...
* ianseeks  [07-13-16 07:38]:
...
HI
Has anyone found an easy to use tool/script to update a photo file
creation
date/time to the date/time that the photo was taken?
I'm having to change all my girlfriends' photos taken on her phone
that
are
backed up to Windows 7 (ugh) and then transferred via samba into the
digikam system.
I *assume* you mean making the file date/time match the exif file
creation
time which *should* match the date/time taken???
exiftool or exiv2 will accomplish this.  I prefer exiv2 as it is
  compiled and much quicker as exiftool is a perl "script".
I do:
    exiv2 -T ./*.{nef,jpg}
you might change to:  exiv2 -T ./*.jpg
changes the file date/time to match the exif image creation date/time
w/o
changing the file name.
I go further and change the image file name to match creation date/time:
  exiv2 mv \-k \-r %y%m%d_%H%M%S_:basename: \.\/*.{nef,jpg}'
results:  160713_075208_dsc9817.jpg
YYMODA HHMMSS orig_file_name
I have quite an extensive collection over the last ~12 years, mostly
sporting events (youth soccer), ~70000 the last four years in darktable.
Thanks Patrick, that looks the ticket. I shall go and give a spin now.
I go one step further, windoz upper-cases most filenames, I include
lowercasing the filename in the same renaming steps above:

#!/bin/sh
# lowercase_filenames - a shell script to convert filenames to lower case
# underscore_filenames - a shell script to change blanks to underscores
# Author: Christian Steinruecken 
#
self=`basename $0`
force=""
verbose=""
convert() {
  x="$1"
  # convert to lowercase
case $self in
  lowercase_filenames)
  newname=`echo "$x" | tr '[A-Z]' '[a-z]'`
  ;;
  underscore_filenames)
  newname=`echo "$x" | tr '[:blank:]' '_'`
esac
  if [ ! "$x" = "$newname" ]; then
    # preserve time stamp
    realdate=`date +%Y%m%d%H%M.%S -r "$x"`
    # this is required on VFAT partitions
    [ -n "$verbose" ] && echo "$x -> $newname"
    mv -i "$x" "${newname}__N_E_W__"
    mv -i "${newname}__N_E_W__" "${newname}"
    # restore time stamp
    touch -m -t "${realdate}" "${newname}"
  fi
}
alpha() {
  y="$1"
  b=`basename "$1"`
  if [ -e "$y" ]; then
    if [ "$force" = "1" ]; then
      convert "$y"
    else
      if [ "$b" = "Makefile" -o "$b" = "Mail" ]; then
         echo "$self: $y: Cowardly refusing to convert this (use
--force)..." >&2 elif [ ! -f "$y" -a ! -d "$y" ]; then
         echo "$self: $y: Special file, skipping..." >&2
      else
         convert "$y"
      fi
    fi
  else
    echo "$self: $y: No such file or directory." >&2
  fi
}
show_help() {
echo "Usage: $self [options] [files...]"
case $self in
  lowercase_filenames)
  echo "Converts filenames to lowercase."
  echo "Options must be specified BEFORE the files."
  ;;
  underscore_filenames)
  echo "Converts blanks in filnames to underscores."
esac
echo "If no files are given, all files in the current working directory will
be" echo "used. Options include:"
echo
echo "   -v, --verbose     Verbose operation"
if [ $self == lowercase_filenames ]; then
echo "   -f, --force       Also convert Makefiles, hidden and special files"
fi
echo "   -h, --help        Display this help"
echo
}
while [ -n "$1" ]; do
case "$1" in
"-h"|"--help") show_help; exit 0 ;;
"-f"|"--force") force="1"; shift ;;
"-v"|"--verbose") verbose="1"; shift ;;
*) break ;;
esac
done
if [ -n "$*" ]; then
   # convert all files (given as parameters)
   for i in "$@"; do
     alpha "$i"
   done
 else
   # take all files in current working directory
   if [ -n "$force" ]; then
     for i in .* *; do
       alpha "$i"
     done
   else
     for i in *; do
       alpha "$i"
     done
   fi
fi
exit 0

-- 
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Kernel: 4.6.3-1-default
"openSUSE Tumbleweed (20160710) (x86_64)"

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