[18556] | 1 | ###########################################################################
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| 2 | #
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| 3 | # AudioConverter - helper plugin that does audio conversion
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| 4 | #
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| 5 | # A component of the Greenstone digital library software
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| 6 | # from the New Zealand Digital Library Project at the
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| 7 | # University of Waikato, New Zealand.
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| 8 | #
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| 9 | # Copyright (C) 2008 New Zealand Digital Library Project
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| 10 | #
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| 11 | # This program is free software; you can redistribute it and/or modify
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| 12 | # it under the terms of the GNU General Public License as published by
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| 13 | # the Free Software Foundation; either version 2 of the License, or
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| 14 | # (at your option) any later version.
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| 15 | #
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| 16 | # This program is distributed in the hope that it will be useful,
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| 17 | # but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 18 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 19 | # GNU General Public License for more details.
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| 20 | #
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| 21 | # You should have received a copy of the GNU General Public License
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| 22 | # along with this program; if not, write to the Free Software
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| 23 | # Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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| 24 | #
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| 25 | ###########################################################################
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| 26 | package AudioConverter;
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| 27 |
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| 28 | use MultimediaConverter;
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| 29 |
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| 30 |
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| 31 | use strict;
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| 32 | no strict 'refs'; # allow filehandles to be variables and viceversa
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| 33 |
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| 34 | use gsprintf 'gsprintf';
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| 35 |
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| 36 | BEGIN {
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| 37 | @AudioConverter::ISA = ('MultimediaConverter');
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| 38 | }
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| 39 |
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| 40 |
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| 41 | my $arguments = [
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| 42 | ];
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| 43 |
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| 44 | my $options = { 'name' => "ImageConverter",
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| 45 | 'desc' => "{ImageConverter.desc}",
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| 46 | 'abstract' => "yes",
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| 47 | 'inherits' => "yes",
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| 48 | 'args' => $arguments };
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| 49 |
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| 50 | sub new {
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| 51 | my ($class) = shift (@_);
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| 52 | my ($pluginlist,$inputargs,$hashArgOptLists) = @_;
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| 53 | push(@$pluginlist, $class);
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| 54 |
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| 55 | push(@{$hashArgOptLists->{"ArgList"}},@{$arguments});
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| 56 | push(@{$hashArgOptLists->{"OptList"}},$options);
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| 57 |
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| 58 | my $self = new MultimediaConverter($pluginlist, $inputargs, $hashArgOptLists, 1);
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| 59 |
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| 60 |
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| 61 | return bless $self, $class;
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| 62 |
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| 63 | }
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| 64 |
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| 65 | # Discover the characteristics of a audio file.
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| 66 |
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| 67 | # Equivalent step to that in ImagePlugin that uses ImageMagicks's
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| 68 | # 'indentify' utility
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| 69 |
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| 70 | # Here we use 'ffmpeg' for audio but for consistency keep the Perl
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| 71 | # method name the same as before
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| 72 |
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| 73 |
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| 74 | sub identify {
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| 75 | my ($audio, $outhandle, $verbosity) = @_;
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| 76 |
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| 77 | # Use the ffmpeg command to get the file specs
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| 78 | my $command = "ffmpeg -i \"$audio\"";
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| 79 |
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| 80 | print $outhandle " $command\n" if ($verbosity > 2);
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| 81 | my $result = '';
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| 82 | $result = `$command 2>&1`;
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| 83 | print $outhandle " $result\n" if ($verbosity > 4);
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| 84 |
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| 85 | # Read the type, width, and height etc.
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| 86 | my $vtype = 'unknown';
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| 87 | my $vcodec = 'unknown';
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| 88 | my $width = 'unknown';
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| 89 | my $height = 'unknown';
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| 90 | my $fps = 'unknown';
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| 91 |
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| 92 | my $atype = 'unknown';
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| 93 | my $afreq = 'unknown';
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| 94 | my $achan = 'unknown';
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| 95 | my $arate = 'unknown';
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| 96 |
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| 97 | my $audio_safe = quotemeta $audio;
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| 98 |
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| 99 | # strip off everything up to filename
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| 100 | $result =~ s/^.*\'$audio_safe\'://s;
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| 101 |
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| 102 | if ($result =~ m/Audio: (\w+), (\d+) Hz, (\w+)(?:, (\d+.*))?/m) {
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| 103 | $atype = $1;
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| 104 | $afreq = $2;
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| 105 | $achan = $3;
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| 106 | $arate = $4 if (defined $4);
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| 107 | }
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| 108 |
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| 109 | # Read the duration
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| 110 | my $duration = "unknown";
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| 111 | if ($result =~ m/Duration: (\d+:\d+:\d+\.\d+)/m) {
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| 112 | $duration = $1;
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| 113 | }
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| 114 | print $outhandle " file: $audio:\t $atype, $duration\n"
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| 115 | if ($verbosity > 2);
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| 116 |
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| 117 | if ($verbosity >3) {
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| 118 | print $outhandle "\t freq = $afreq Hz, $achan, $arate\n";
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| 119 | }
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| 120 |
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| 121 | # Return the specs
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| 122 | return ($duration, -s $audio, $atype,$afreq,$achan,$arate);
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| 123 | }
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| 124 |
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| 125 |
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| 126 |
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| 127 | sub audio_converto_cmd
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| 128 | {
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| 129 | my $self = shift (@_);
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| 130 | my ($originalfilename,$converttotype) = @_;
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| 131 |
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| 132 | my $output_dir = $self->{'cached_dir'};
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| 133 | my $iaudio_root = $self->{'cached_file_root'};
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| 134 |
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| 135 |
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| 136 | my $file = "$iaudio_root.$converttotype";
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| 137 | my $filename = &util::filename_cat($output_dir,$file);
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| 138 |
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| 139 | my $exp_duration = $self->{'exp_duration'};
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| 140 | my $t_opt = (defined $exp_duration) ? "-t $exp_duration" : "";
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| 141 |
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| 142 | my $main_opts = "-y $t_opt";
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| 143 |
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| 144 |
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| 145 | my $originalfilename_gsdlenv = $self->gsdlhome_independent($originalfilename);
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| 146 | my $filename_gsdlenv = $self->gsdlhome_independent($filename);
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| 147 |
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| 148 |
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| 149 | my $convertto_cmd = "ffmpeg $main_opts -i \"$originalfilename_gsdlenv\"";
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| 150 | $convertto_cmd .= " -y \"$filename_gsdlenv\"";
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| 151 |
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| 152 | return $convertto_cmd;
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| 153 | }
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| 154 |
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| 155 |
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| 156 |
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[25346] | 157 | sub audio_stream_ffmpeg_cmd
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[18556] | 158 | {
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| 159 | my $self = shift (@_);
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[25346] | 160 | my ($iaudio_filename, $ofile_ext,
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[18556] | 161 | $streaming_bitrate,$streaming_size,
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| 162 | $opt_streaming_achan, $opt_streaming_arate) = @_;
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| 163 |
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| 164 | my $streaming_achan
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| 165 | = (defined $opt_streaming_achan) ? $opt_streaming_achan : 2;
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| 166 |
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| 167 | my $streaming_arate
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| 168 | = (defined $opt_streaming_arate) ? $opt_streaming_arate : 22050;
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| 169 |
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| 170 | my $output_dir = $self->{'cached_dir'};
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| 171 | my $iaudio_root = $self->{'cached_file_root'};
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| 172 |
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[25346] | 173 | my $op_file = "${iaudio_root}_stream.$ofile_ext";
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| 174 | my $op_filename = &util::filename_cat($output_dir,$op_file);
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[18556] | 175 |
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| 176 | my $exp_duration = $self->{'exp_duration'};
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| 177 | my $t_opt = (defined $exp_duration) ? "-t $exp_duration" : "";
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| 178 |
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| 179 | my $main_opts = "-y $t_opt";
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| 180 |
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| 181 | my $bitrate_opt = "-b $streaming_bitrate";
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| 182 | my $stream_opts .= " -ac $streaming_achan -ar $streaming_arate";
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| 183 |
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| 184 |
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| 185 | my $all_opts = "$main_opts $stream_opts";
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| 186 |
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| 187 | my $ffmpeg_cmd;
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| 188 |
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| 189 | my $iaudio_filename_gsdlenv = $self->gsdlhome_independent($iaudio_filename);
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[25346] | 190 | my $op_filename_gsdlenv = $self->gsdlhome_independent($op_filename);
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[18556] | 191 |
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| 192 |
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[25346] | 193 | $ffmpeg_cmd = "ffmpeg -i \"$iaudio_filename_gsdlenv\" $all_opts -y \"$op_filename_gsdlenv\"";
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[18556] | 194 |
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[25346] | 195 | return ($ffmpeg_cmd,$op_filename,$op_file);
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[18556] | 196 | }
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| 197 |
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| 198 |
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| 199 |
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[25346] | 200 | sub stream_mp4_audio_cmd
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| 201 | {
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| 202 | my $self = shift (@_);
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| 203 | my ($ivideo_filename,$streaming_HQ_size, $streaming_HQ_AudioBitrate) = @_;
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| 204 |
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| 205 | my $output_dir = $self->{'cached_dir'};
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| 206 | my $ivideo_root = $self->{'cached_file_root'};
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| 207 |
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| 208 | my $omp4_file = "${ivideo_root}_aHQstream.mp4";
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| 209 | my $omp4_filename = &util::filename_cat($output_dir,$omp4_file);
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| 210 |
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| 211 |
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| 212 | #my $exp_duration = $self->{'exp_duration'};
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| 213 | #my $t_opt = (defined $exp_duration) ? "-t $exp_duration" : "";
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| 214 |
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| 215 | my $deinterlace = $self->{'videoDeinterlacingFilter'};
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| 216 | my $video_processing_parameters;
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| 217 | # Use specific resizing algorythms depending if we need to downsize the video resolution or not
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| 218 | if(!$streaming_HQ_size || $streaming_HQ_size eq "fullsize") {
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| 219 | $video_processing_parameters = "--strict-anamorphic";
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| 220 | } else {
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| 221 | $video_processing_parameters = "-w $streaming_HQ_size --loose-anamorphic";
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| 222 | }
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| 223 | # Use the deinterlace video filter if enabled in the plugin
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| 224 | if ($deinterlace eq "true")
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| 225 | {
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| 226 | $video_processing_parameters .= " --decomb";
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| 227 | }
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| 228 |
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| 229 | my $ivideo_filename_gsdlenv = $self->gsdlhome_independent($ivideo_filename);
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| 230 | my $omp4_filename_gsdlenv = $self->gsdlhome_independent($omp4_filename);
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| 231 |
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| 232 | # Generate the pre and post video parameters for Handbrake v0.9.4
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| 233 | my $pre_opts = "-t 1 -c 1";
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| 234 | my $post_opts = "-f mp4 -O $video_processing_parameters -e x264 -a 1 -E faac -6 dpl2 -R Auto -B $streaming_HQ_AudioBitrate -D 0.0 -x ref=2:bframes=2:subq=6:mixed-refs=0:weightb=0:8x8dct=0:trellis=0";
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| 235 |
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| 236 | my $handbrake_cmd = "HandbrakeCLI.exe -i \"$ivideo_filename_gsdlenv\" $pre_opts -o \"$omp4_filename_gsdlenv\" $post_opts";
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| 237 |
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| 238 | #print STDERR "****\nHandbrake command: $handbrake_cmd\n****\n";
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| 239 |
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| 240 | return ($handbrake_cmd,$omp4_filename,$omp4_file);
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| 241 | }
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| 242 |
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| 243 |
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| 244 |
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| 245 |
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| 246 |
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[18556] | 247 | 1;
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