2 # Author: Alan J. Pippin
3 # Description: Extract the given chapter(s) from an mkv file into separate video files
7 # Video: h264 (avc1 / 0x31637661)
11 # Video: h264 (High) (HDMV / 0x564D4448)
12 # Audio: ac3 (AC-3 / 0x332D4341)
15 # Video: h264 (Baseline) (avc1 / 0x31637661)
16 # Audio: aac (mp4a / 0x6134706D)
19 # Video: h264 (Baseline) (avc1 / 0x31637661)
20 # Audio: aac (mp4a / 0x6134706D)
23 #ffmpeg -ss 00:00:00.000 -t 00:00:38.299 -i 2010-12-04.000.mkv -map 0 -vcodec copy -acodec copy test.mov
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31 ####################################################################################################
32 # Configuration parameters - CHANGE THESE TO SUITE YOUR NEEDS
33 my $ffmpeg=`which ffmpeg`; chomp($ffmpeg);
34 my $tmpfile = `tempfile`; chomp($tmpfile);
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37 ####################################################################################################
38 # Command Line Options
41 if(! -x $ffmpeg) { die "-E- Unable to find required program: ffmpeg\n"; }
42 if(! defined $opt_i) { &usage(); die "-E- Missing required argument input video name: -i <input.mkv>\n"; }
43 if(! defined $opt_c) { &usage(); die "-E- Missing required chapter: -c <all|1,2,...>"; }
44 if(! -r $opt_i) { &usage(); die "-E- Unable to open/find the input mkv file: $opt_i\n"; }
45 if(! defined $opt_o) {
46 if($opt_i =~ /^(\d+-\d+-\d+)/) { $opt_o = $1; }
47 elsif($opt_i =~ /^(.*?)\./) { $opt_o = $1; }
51 print "usage: $0 -i <input.mkv> -o <output_base_name> -c <chapter,chapter,...>\n";
52 print " -c <chapter,chapter,...> Specify which chapter from the mkv file to extract (all or 1,2,3, ...)\n";
53 print " -i <input.mkv> Specify the name of the input mkv file\n";
54 print " -o <output_base_name> Sets the base name to use when naming the output videos extracted from the chapters\n";
55 print " If not specified, the base name will be taken from the name of your input video\n";
56 print " -e <ext> Specify the extension that should be used on the output files.\n";
57 print " This is automatically determined. You only need to specify it if autodetection fails.\n";
58 print " -s Simulate mode. Don't actually make the video, but tell us what you will do\n";
63 ####################################################################################################
67 my ($ffmpeg_info) = @_;
75 foreach $line (@{$ffmpeg_info}) {
76 if($line =~ /Stream/) {
77 if($line =~ /h264/i) { $h264 = 1; }
78 if($line =~ /h264.*High/i) { $h264_high = 1; }
79 if($line =~ /ac3/i) { $ac3 = 1; }
80 if($line =~ /aac/i) { $aac = 1; }
81 if($line =~ /pcm_s16le/i) { $pcm_s16le = 1; }
85 if($h264 && $pcm_s16le) { return "mov"; }
86 if($h264_high && $ac3) { return "mts"; }
87 if($h264 && $aac) { return "mp4"; }
93 my ($chapters, $chapter) = @_;
94 foreach $ch (@{$chapters}) {
95 if($ch == $chapter) { return 1; }
100 ####################################################################################################
103 # Turn our list of chapters into an ordered array
104 my @chapters = sort(split(/,/, $opt_c));
105 my $all_chapters = 0;
106 if($opt_c =~ /all/) { $all_chapters = 1; }
107 print "-> Extracting the following chapters from $opt_i: @chapters\n";
109 # Use ffmpeg to extract the list of chapters available to rip
110 # For each chapter specified on the command line, use ffmpeg to extract a video clip from that chapter
111 my @ffmpeg_info = `$ffmpeg -i $opt_i 2>&1`;
112 foreach $line (@ffmpeg_info) {
113 if($line =~ /Chapter #\d+\.(\d+): start (\S+), end (\S+)/) {
117 $duration = $end - $start;
118 if($duration < 0) { die "-E- Unexpected negative duration detected for chapter $chapter\n"; }
119 if($all_chapters || &export_chapter(\@chapters,$chapter)) {
121 if(defined $opt_e) { $ext = $opt_e; }
122 else { $ext = &detect_ext(\@ffmpeg_info); }
123 if($ext =~ /UNKNOWN/) { die "-E- Unable to determine the file type/extension to use for the output videos. Specify it with the -e <ext> option.\n"; }
124 $dstfile = $opt_o . ".c" . sprintf("%03d",$chapter) . "." . $ext;
125 print "-> Exporting $chapter to $dstfile: ";
126 $cmd = "ffmpeg -ss $start -t $duration -i $opt_i -map 0 -vcodec copy -acodec copy $dstfile 2>&1";
131 $errno = system("$cmd");
132 $errno = $errno >> 8;
133 if($errno > 0) { die "-E- ffmpeg encountered some errors with exit code $errno\n"; }
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