尝试两天将ExifTool的所有可读(非二进制)输出保存到散列中,并将文件路径作为键:
use strict;
use warnings;
use Image::ExifTool;
use Data::Types qw(:all);
use v5.28;
my @directories = ("/some/filepath/to-pictures");
my @suffixes = qw(jpg jpeg gif png raw svg tif tiff psd orf nef eps cr2 arw);
my %file_catalog = ();
while (my $folder = shift @directories) {
opendir(DirHandle, "$folder") or die "Cannot open $folder\n";
my @files = readdir(DirHandle);
closedir(DirHandle);
foreach my $file (@files) {
my $file_string = "$folder/$file";
if (-f $file_string) {
my $sep_pos = rindex($file, ".");
my $end_chars = -($sep_pos - (length $file) + 1);
my $suffix = substr $file, $sep_pos + 1, $end_chars;
if (grep ( lc $suffix, @suffixes)) {
my $exif_tool = new Image::ExifTool;
my $info = $exif_tool->ImageInfo($file_string);
say "Datei: $file_string";
%file_catalog = ($file_string => $info);
foreach (keys %{$info}) {
say "Key: $_ => Value: $$info{ $_ }";
}
}
}
}
}
也行不通:%file_catalog = ($file_string => %{$info});
。
但是,我要么在%file_catalog
中获得不止一张图片的信息 - 你能解释一下吗?
或者我在"Can't use string as a HASH ref while "strict refs" in use"
的提交历史中可以看到解除引用("Odd number of elements in hash assignment"
)或存储(repo)时遇到很多问题。
当然,并非所有图像都具有相同的exif-informations,每个图像都提供不同的key->值。
对于测试输出:
my $hash_size = keys %file_catalog;
print "\n---------------------------\n";
print "In 'file_catalog'-hash recorded image-path (key)-/ exif-data (value)-hashes: ", $hash_size;
print "\n---------------------------\n";
my ($i, $j) = 0;
foreach my $key (sort keys %file_catalog) {
$i++;
printf "%s. key: $key\n", uc chr($i + ord('A') - 1 );
foreach my $inner_key (keys %{$file_catalog{ $key }}) {
$j++;
say "$j. inner key: $inner_key: $file_catalog{$key}{$inner_key}";
}
}
也许有人可以帮助我理解。也可能有比我的新手代码更好的构造。