#!perl

## no critic: TestingAndDebugging::RequireUseStrict

our $AUTHORITY = 'cpan:PERLANCAR'; # AUTHORITY
our $DATE = '2024-01-13'; # DATE
our $DIST = 'App-SubtitleUtils'; # DIST
our $VERSION = '0.013'; # VERSION

die "Usage: $0 frames FILE\n" unless @ARGV >= 1;
$_ = shift @ARGV;
if (/^[+-]?\d+$/) {
	$frames = $_;
} else {
	die "FATAL: Invalid number of frames `$_'\n";
}

while (<>) {
	next unless /\S/;
	($frame1, $frame2, $text) = /\{(\d+)\}\{(\d+)\}(.*)/ or
		die "FATAL: Invalid entry in line $.: $_\n";
	printf "{%d}{%d}%s\n", $frame1+$frames, $frame2+$frames, $text;
}

# ABSTRACT: Shift timestamps in .sub subtitle
# PODNAME: subshift

__END__

=pod

=encoding UTF-8

=head1 NAME

subshift - Shift timestamps in .sub subtitle

=head1 VERSION

This document describes version 0.013 of subshift (from Perl distribution App-SubtitleUtils), released on 2024-01-13.

=head1 SYNOPSIS

 % subshift <frames> <FILE>

=head1 HOMEPAGE

Please visit the project's homepage at L<https://metacpan.org/release/App-SubtitleUtils>.

=head1 SOURCE

Source repository is at L<https://github.com/perlancar/perl-App-SubtitleUtils>.

=head1 HISTORY

2003-04-12 - first written

2021-01-08 - put in CPAN distribution App-SubtitleUtils

=head1 AUTHOR

perlancar <perlancar@cpan.org>

=head1 CONTRIBUTING


To contribute, you can send patches by email/via RT, or send pull requests on
GitHub.

Most of the time, you don't need to build the distribution yourself. You can
simply modify the code, then test via:

 % prove -l

If you want to build the distribution (e.g. to try to install it locally on your
system), you can install L<Dist::Zilla>,
L<Dist::Zilla::PluginBundle::Author::PERLANCAR>,
L<Pod::Weaver::PluginBundle::Author::PERLANCAR>, and sometimes one or two other
Dist::Zilla- and/or Pod::Weaver plugins. Any additional steps required beyond
that are considered a bug and can be reported to me.

=head1 COPYRIGHT AND LICENSE

This software is copyright (c) 2024, 2022, 2021, 2020 by perlancar <perlancar@cpan.org>.

This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.

=head1 BUGS

Please report any bugs or feature requests on the bugtracker website L<https://rt.cpan.org/Public/Dist/Display.html?Name=App-SubtitleUtils>

When submitting a bug or request, please include a test-file or a
patch to an existing test-file that illustrates the bug or desired
feature.

=cut