Video Cutter: Video Cutting using Mencoder

I have written a perl script, then can split/cut parts from a video file.

#!/usr/bin/perl -w
#===============================================================================
#
#         FILE:  video_cutter.pl
#
#        USAGE:  ./video_cutter.pl [options] <input_video_file>
#
#  DESCRIPTION:  
#
#      OPTIONS:  ---
# REQUIREMENTS:  ---
#         BUGS:  ---
#        NOTES:  ---
#       AUTHOR:  Mitesh Singh Jat (mitesh), <mitesh[at]yahoo-inc[dot]com>
#      VERSION:  1.0
#      CREATED:  06/26/2011 03:57:55 PM IST
#     REVISION:  ---
#===============================================================================

use strict;
use warnings;

use Getopt::Std;

sub usage()
{
   print STDERR "USAGE: $0 [options] <input_video_file>\n";
   print STDERR "          -c <conf_file>    default  /base_dir/input_video_file/video_cutter.conf\n";
   print STDERR "                            Start_time(hh:mm:ss),End_time(hh:mm:ss)\n\n";
   print STDERR "          -o <out_dir>      default  /base_dir/input_video_file/\n";
}

sub hms_to_seconds()
{
   my $end_sec = 0;
   my ($h, $m, $s) = split(/:/, $_[0]);
   $s = defined($s) ? $s : 0;
   $end_sec += $s;
   $m = defined($m) ? $m : 0;
   $end_sec += (60 * $m);
   $h = defined($h) ? $h : 0;
   $end_sec += (3600 * $h);
   return($end_sec);
}

my %opts;
getopt('o:c:', \%opts);

foreach my $opt (sort keys %opts)
{
   if (!defined($opts{$opt}))
   {
       print STDERR "$0: Requires value for option '$opt'\n";
       &usage();
       exit(-1);
   }
}

if (@ARGV != 1)
{
   &usage();
   exit(-1);
}

my $input_video_file = "$ARGV[0]";
my $out_dir = `dirname $input_video_file`;
chomp($out_dir);
my $conf_file = "$out_dir/video_cutter.conf";

if (defined($opts{"c"}))
{
   $conf_file = $opts{"c"};
}
if (defined($opts{"o"}))
{
   $out_dir = $opts{"o"};
}

unless (-f "$input_video_file")
{
   print STDERR "$0: Input video file '$input_video_file' is not present\n";
   exit(-1);
}
unless (-f "$conf_file")
{
   print STDERR "$0: split conf file '$conf_file' is not present\n";
   exit(-1);
}
unless (-d "$out_dir")
{
   print STDERR "$0: out dir '$out_dir' is not present\n";
   exit(-1);
}
unless (-w "$out_dir")
{
   print STDERR "$0: out dir '$out_dir' is not writable\n";
   exit(-1);
}

my $mencoder = "/usr/local/bin/mencoder";
unless (-x $mencoder)
{
   $mencoder = "/usr/bin/mencoder";
}
unless (-x $mencoder)
{
   print STDERR "$0: please install mencoder\n";
   print STDERR "sudo apt-get install mencoder\n";
   exit(-1);
}

open(CFH, "$conf_file") or die("$0: Cannot open '$conf_file'\n");
my $line;
my $nline = 0;
my $nsplit = 0;
my $split_name = `basename $input_video_file`;
chomp($split_name);
$split_name =~ s/\.[^.]*$//;
my $split_ext = $input_video_file;
$split_ext =~ s/.*\.([^.]*)$/$1/;
my $success = 0;
while ($line = <CFH>)
{
   chomp($line);
   $nline++;
   next if ($line =~ m/^#/);
   my ($start_time, $end_time) = split(/,/, $line);
   next if (!defined($end_time));
   my $start_sec = &hms_to_seconds($start_time);
   my $end_sec = &hms_to_seconds($end_time);
   if ($start_sec >= $end_sec)
   {
       print STDERR "$0: $start_sec >= $end_sec\n";
       print STDERR "    $start_time >= $end_time ... skipping for line no $nline ...\n";
       next;
   }
   $end_sec -= $start_sec;
   my $cmd = sprintf("%s -ss %d -endpos %d -ovc copy -oac copy -o %s/%s_%03d.%s %s",
           $mencoder, $start_sec, $end_sec, $out_dir, $split_name, $nsplit,
           $split_ext, $input_video_file);
   print "\n\n";
   print "-" x 80 . "\n";;
   print "$cmd\n";
   system("$cmd");
   if ($? != 0)
   {
       print STDERR "$0: failed to create $nsplit split for line no $nline\n";
       print STDERR "\t$cmd\n";
   }
   else
   {
       print STDOUT "Created $nsplit split for line $nline\n";
       $success++;
   }
   print "-" x 80 . "\n";;
   $nsplit++;
}

close(CFH);

print "\n";
print "=" x 80 . "\n";;
printf("Total lines = %d,   Success = %d/%d,  Failure = %d/%d\n",
       $nline, $success, $nsplit,
       $nsplit - $success, $nsplit);
print "=" x 80 . "\n";;

exit(0);

Please place the above perl script (video_cutter.pl) in any directory present in $PATH.

Sample Run:

Usage of the above script.

$ video_cutter.pl 
USAGE: /home/mitesh/Programming/Perl/WCS/video_cutter.pl [options] 
         -c     default  /base_dir/input_video_file/video_cutter.conf
                           Start_time(hh:mm:ss),End_time(hh:mm:ss)

         -o       default  /base_dir/input_video_file/

Content of a sample config file, specifying the split timings.
This will create 3 splits, of 0s-90s, 140s-210s, and 240s-End.

$ cat test_video.conf 
00:00:00,00:01:30
00:02:20,00:03:30
00:04:00,59:59:00

Now, it will create the three split files in ~/Video/test/ directory.

$ video_cutter.pl -c test_video.conf -o ~/Video/test test_video.vob 

--------------------------------------------------------------------------------
/usr/local/bin/mencoder -ss 0 -endpos 90 -ovc copy -oac copy -o /home/mitesh/Video/test/test_video_000.vob test_video.vob
MEncoder 1.0rc4-4.4.5 (C) 2000-2010 MPlayer Team
...
...
...
Created 2 split for line 3
--------------------------------------------------------------------------------

================================================================================
Total lines = 3,   Success = 3/3,  Failure = 0/3
================================================================================
$ ls -l ~/Video/test/*.vob
-rw-r--r-- 1 mitesh mitesh   7519672 Jun 27 00:31 /home/mitesh/Video/test/test_video_000.vob
-rw-r--r-- 1 mitesh mitesh   5844598 Jun 27 00:31 /home/mitesh/Video/test/test_video_001.vob
-rw-r--r-- 1 mitesh mitesh 570855360 Jun 27 00:30 /home/mitesh/Video/test/test_video_002.vob

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