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# -- encoding: utf-8 --
require 'rubygems'
require 'mini_exiftool'
if ARGV.size < 2
puts "usage: ruby #{__FILE__} [+|-]SECONDS FILES"
puts " i.e.: ruby #{__FILE__} 3600 *.jpg"
exit -1
end
delta = ARGV.shift.to_i
ARGV.each do |filename|
begin
photo = MiniExiftool.new filename
rescue MiniExiftool::Error => e
$stderr.puts e.message
exit -1
end
time = photo.date_time_original
# time is a Time object, so we can use the methods of it :)
photo.date_time_original = time + delta
save_ok = photo.save
if save_ok
fmt = '%Y-%m-%d %H:%M:%S'
puts "#{filename} changed: #{time.strftime(fmt)} -> #{(time + delta).strftime(fmt)}"
else
puts "#{filename} could not be changed"
end
end
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