234 lines
6 KiB
Perl
Executable file
234 lines
6 KiB
Perl
Executable file
#!/usr/bin/perl -w
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=pod
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=head1 NAME
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splitvideo - Split video at time stamp
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=head1 SYNOPSIS
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B<splitvideo> time videofile
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=head1 DESCRIPTION
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B<splitvideo> splits I<videofile> at I<time>.
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I<time> is given in seconds or as HH:MM:SS.s.
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I<videofile> will be split into: I<videofile>-00:00:00.0-ZZ:ZZ:ZZ.Z
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and I<videofile>-ZZ:ZZ:ZZ.Z-YY:YY:YY.Y where Z is the split time and Y
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is the length of the video.
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If I<videofile> contains XX:XX:XX.X-YY:YY:YY.Y I<videofile> will be
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split into: I<videofile>-XX:XX:XX.X-ZZ:ZZ:ZZ.Z and
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I<videofile>-ZZ:ZZ:ZZ.Z-YY:YY:YY.Y.
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After splitting is done I<videofile> is moved to ~/.rm/splitvideo.
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=head1 USES
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B<splitvideo> can be used on the commandline:
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splitvideo 3600 myvideo.mp4
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It can also be called from VLC by installing B<splitvideo.lua> from
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https://gitlab.com/ole.tange/tangetools/tree/master/splitvideo in
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B<~/.local/share/vlc/lua/extensions/>
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=head1 AUTHOR
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Copyright (C) 2019 Ole Tange,
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http://ole.tange.dk and Free Software Foundation, Inc.
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=head1 LICENSE
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Copyright (C) 2012 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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at your option any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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=head1 DEPENDENCIES
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B<splitvideo> uses B<perl> and B<ffmpeg>.
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=head1 SEE ALSO
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B<ffmpeg>
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=cut
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use strict;
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my $time = shift;
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my $infile = shift;
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my $rmdir = find_rm_dir(".") || ".rm";
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-d $rmdir or mkdir $rmdir;
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$rmdir .= "/splitvideo";
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-d $rmdir or mkdir $rmdir;
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$time = format_time($time);
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if(not -e $infile or $time !~ /\d\d:\d\d:\d\d.\d/) {
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print "$time";
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print "$0 HH:MM:SS.t video.file\n",
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"To split video.file at HH:MM:SS.t\n",
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"The original file will be moved to .../.rm\n\n";
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} else {
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my ($start_file,$end_file) = destinationfilenames($infile,$time);
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# fmpeg -t 00:25:29 -i in.mp4 -c copy out-start.mp4
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my @start = ("ffmpeg","-t",$time,"-i","file:$infile","-c","copy","file:$start_file");
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system(@start) == 0 or die(join" ",@start);
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# fmpeg -ss 00:25:29 -i in.mp4 -c copy out-end.mp4
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my @end = ("ffmpeg","-ss",$time,"-i","file:$infile","-c","copy","file:$end_file");
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system(@end) == 0 or die(join" ",@end);
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system("mv",$infile,$rmdir) == 0 or die;
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}
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sub destinationfilenames {
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# Inputs:
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# $file = video file name
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# $time = time to split at
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# Return name with:
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# basename-(starttime)-(starttime+time).ext
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# basename-(starttime+time)-(videolength).ext
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my $file = shift;
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my $time = shift;
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my ($startfile,$endfile);
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my $basename = $file;
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$basename =~ s/(\.[^.]+)$//;
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my $extension = $1;
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if($basename =~ s/-(\d\d:\d\d:\d\d.\d)-(\d\d:\d\d:\d\d.\d)//) {
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my $add = format_time(to_secs($1)+to_secs($time));
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$startfile = "$basename-$1-$add$extension";
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$endfile = "$basename-$add-$2$extension";
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} else {
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my $length = videolength($file);
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$startfile = "$basename-00:00:00.0-$time$extension";
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$endfile = "$basename-$time-$length$extension";
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}
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return($startfile,$endfile);
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}
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sub videolength {
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# Inputs:
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# $file = video filename
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# Return:
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# length of $file in 00:00:00.0 format
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my $file = shell_quote_scalar_default(shift);
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# mp4info 'The future of London'"'"'s airports-KXmpdJO9UOc.mp4'
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# The future of London's airports-KXmpdJO9UOc.mp4:
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# Track Type Info
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# 1 video H264 Main@3.1, 561.560 secs, 932 kbps, 1280x720 @ 25.000000 fps
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# 2 audio MPEG-4 AAC LC, 561.574 secs, 0 kbps, 44100 Hz
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open(my $fh, "-|", "mp4info $file") || die;
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my $length = 0;
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for(<$fh>) {
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/(\d+.\d+) secs/ and $length = max($1,$length);
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warn $_;
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}
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$length ||= "99:99:99.9";
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$length = format_time($length);
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return $length;
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}
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sub max(@) {
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# Returns:
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# Maximum value of array
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my $max;
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for (@_) {
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# Skip undefs
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defined $_ or next;
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defined $max or do { $max = $_; next; }; # Set $_ to the first non-undef
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$max = ($max > $_) ? $max : $_;
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}
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return $max;
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}
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sub shell_quote_scalar_default($) {
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# Quote for other shells (Bourne compatibles)
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# Inputs:
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# $string = string to be quoted
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# Returns:
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# $shell_quoted = string quoted as needed by the shell
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my $s = $_[0];
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if($s =~ /[^-_.+a-z0-9\/]/i) {
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$s =~ s/'/'"'"'/g; # "-quote single quotes
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$s = "'$s'"; # '-quote entire string
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$s =~ s/^''//; # Remove unneeded '' at ends
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$s =~ s/''$//; # (faster than s/^''|''$//g)
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return $s;
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} elsif ($s eq "") {
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return "''";
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} else {
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# No quoting needed
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return $s;
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}
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}
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sub to_secs {
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# Inputs:
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# $time = time in seconds or 00:00:00.0
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# Returns:
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# time in seconds
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my $time = shift;
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$time =~ /(((\d\d):)?((\d\d):))?(\d\d+)\.(\d+)/;
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my $secs = $3 * 3600 + $5 * 60 + $6 + eval "0.$7";
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return $secs;
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}
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sub format_time {
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# Inputs:
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# $time = time in seconds or 00:00:00.0
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# Returns:
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# time in 00:00:00.0
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my $time = shift;
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if($time =~ /^\d+(\.\d+)?$/) {
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# Time in seconds
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my $h = int($time/3600);
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my $m = int($time/60) - 60*$h;
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my $s = int($time) - 60*$m - 3600*$h;
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my $ys = $time - int($time);
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$time = sprintf("%02d:%02d:%02d.%d",$h,$m,$s,$ys);
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}
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$time =~ s/^(\d):?(\d\d)$/00:0$1:$2/;
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$time =~ s/^(\d\d):?(\d\d)$/00:$1:$2/;
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$time =~ s/^(\d\d:\d\d)$/00:$1/;
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$time =~ s/^(\d\d:\d\d:\d\d)$/$1.0/;
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return $time;
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}
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sub find_rm_dir {
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my $dir = shift;
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if(-d "$dir/.rm") {
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return "$dir/.rm";
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}
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if(join(" ",stat $dir) eq join(" ",stat "../$dir")) {
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# We have reached root dir (.. = .)
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return undef;
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} else {
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return find_rm_dir("../$dir");
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}
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}
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