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133 lines
3.9 KiB
133 lines
3.9 KiB
#!/usr/bin/env perl |
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use strict; |
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use warnings; |
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use lib 'lib'; |
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use utf8; |
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use Getopt::Long; |
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use Subtitle::SSA; |
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sub usage { |
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my ($msg) = @_; |
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print $msg, "\n" if $msg; |
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print <<USAGE; |
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Usage: ssa-retime <mode> [<options>] -i <file> [ -o <file>] |
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Modes are: |
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* framerate Retime whole file from one fps to another. |
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* points Retime file specifying point(s) & time shift for it. |
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* shift Shift whole file or it's part for given time. |
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Common options: |
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-h This help. |
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-i <file> Input file. (mandatory). |
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-o <file> Output file. Default: write to stdout. |
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-v Be verbose. |
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Specific options for 'shift' mode: |
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-S <string> Retime only events with specified style. |
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This option may be given more than once. |
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-s <time> Start time of period, that will be changed. |
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Default: first event. |
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-e <time> End time of period, that will be changed. |
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Default: the latest time found in file. |
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-l <time> Duration of period above. This option require '-s' |
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You may select either '-o' or '-e' at the same time. |
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-t <time> Change time for this value. |
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Specific options for 'framerate' mode: |
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-f <float> Source framerate. Default: 25.0 fps. |
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-F <float> Target framerate. |
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Specific options for 'points' mode: |
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-p <time>/<time> Point of fixup & time shift in it. Option can be |
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specified more than once. (see man for details) |
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Both args must be in form of [-][[h:]m:]s[.ms]. |
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USAGE |
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exit 1; |
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} |
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########### init ################### |
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$| = 1; |
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my $mode = shift @ARGV; |
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my @points; |
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my %opts = ( loglevel => 0, inrate => 25.0 ); |
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#GetOptions("qvhi:o:S:f:F:p:t:s:e:l:", \%opts) |
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GetOptions( |
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'h|help' => \&usage, |
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'v|verbose+' => \$opts{loglevel}, |
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'i|infile=s' => \$opts{infile}, |
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'o|outfile=s' => \$opts{outfile}, |
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'S|style=s' => \$opts{style}, |
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's|shiftstart=s'=> \$opts{shiftstart}, |
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'e|shiftend=s' => \$opts{shiftend}, |
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'l|shiftlen=f' => \$opts{shiftlen}, |
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't|shifttime=f' => \$opts{shifttime}, |
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'f|inrate=f' => \$opts{inrate}, |
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'F|outrate=f' => \$opts{outrate}, |
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'p|point' => \@points, |
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); |
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($opts{infile} and -f $opts{infile}) |
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or usage("Input file not exists"); |
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if ($mode eq 'framerate') { |
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$opts{outrate} |
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or usage("You should set at least '-F' option in this mode"); |
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($opts{inrate} != 0.0 and $opts{outrate} != 0.0) |
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or usage("Framerate can't be zero"); |
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} elsif ($mode eq 'shift') { |
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$opts{shifttime} |
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or usage("You should set '-t' option in this mode"); |
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(not $opts{shiftstart} or $opts{shiftstart} > 0.0) |
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or usage("Shift start must be positive time"); |
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(not $opts{shiftend} or $opts{shiftend} > 0.0) |
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or usage("Shift end must be positive time"); |
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(not $opts{shiftlen} or $opts{shiftlen} > 0.0) |
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or usage("Shift length must be positive time"); |
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} elsif ($mode eq 'points') { |
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scalar(@points) |
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or usage("You should specify at least one shift point"); |
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foreach my $point (@points) { |
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... |
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} |
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} else { |
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usage("Incorrect mode: $mode (see help below)"); |
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} |
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my $ssa = Subtitle::SSA->new(debug => !!$opts{loglevel}); |
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if ($ssa->from_file($opts{infile}) < 0) { |
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warn "Can't parse input file: $opts{infile}\n"; |
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exit 1; |
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} |
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if ($mode eq 'framerate') { |
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my $mod = $opts{inrate} / $opts{outrate}; |
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foreach my $event (@{ $ssa->{events} }) { |
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$event->{start} *= $mod; |
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$event->{end} *= $mod; |
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} |
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} elsif ($mode eq 'shift') { |
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my $style = $opts{style}; |
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my $start = $opts{shiftstart} // 0.0; |
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my $end = $opts{shiftend} // (($opts{shiftlen}) ? $start + $opts{shiftend} : undef); |
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my $mod = $opts{shifttime}; |
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foreach my $event (@{ $ssa->{events} }) { |
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next if ($style and $event->{style} ne $style); |
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next if ($start and $event->{start} < $start); |
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next if ($end and $event->{end} > $end); |
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$event->{start} += $mod; |
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$event->{end} += $mod; |
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} |
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} elsif ($mode eq 'points') { |
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...; |
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} |
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exit 0;
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