use strict;
my $str = 'Subject-KrzpfTest [02/30] - ""KrzpfTest.part.nzb"" yEnc
[PRiVATE]-[WtFnZb]-[Supertje-_S03E11-12_-blabla_+_blabla_WEBDL-480p.mkv]-[4/12] - "" yEnc 9786 (1/1366)
[N3wZ] MAlXD245333\\\\::[PRiVATE]-[WtFnZb]-[Show.S04E04.720p.AMZN.WEBRip.x264-GalaxyTV.mkv]-[1/2] - "" yEnc 293197257 (1/573)
Singer - A Album (2005) - [04/25] - 02 Sweetest Somebody (I Know).flac
[PRiVATE]-[WtFnZb]-[00000.clpi]-[1/46] - "" yEnc 788 (1/1)
[PRiVATE]-[WtFnZb]-[/More.Bla.S02E01.1080p.WEB.h264-EDITH[eztv.re].mkv] yEnc 2990558544 (1/4173)
';
my $regex = qr/\b([\w\-+()' .,]+(?:\[[\w\-\/+()' .,]*\][\w\-+()' .,]*)*\.[A-Za-z0-9]{2,4})\b/p;
if ( $str =~ /$regex/g ) {
print "Whole match is ${^MATCH} and its start/end positions can be obtained via \$-[0] and \$+[0]\n";
# print "Capture Group 1 is $1 and its start/end positions can be obtained via \$-[1] and \$+[1]\n";
# print "Capture Group 2 is $2 ... and so on\n";
}
# ${^POSTMATCH} and ${^PREMATCH} are also available with the use of '/p'
# Named capture groups can be called via $+{name}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Perl, please visit: http://perldoc.perl.org/perlre.html