diplodocus.org Git - flac-archive/blob - flac2mp3

   1 #!/usr/local/bin/perl
   2
   3 =head1 NAME
   4
   5 B<flac2mp3> - transcode FLAC file to MP3 files
   6
   7 =head1 SYNOPSIS
   8
   9 B<flac2mp3> [B<--lame-options> I<lame-options>] [B<-q>] [B<-v>] I<file> [...]
  10
  11 =head1 DESCRIPTION
  12
  13 B<flac2mp3> transcodes the FLAC files I<file> to MP3 files.  I<file>
  14 may be the kind of FLAC file B<fa-flacd> generates.  That is, it
  15 contains a cue sheet, one TITLE tag per track listed therein, and
  16 ARTIST, ALBUM, and DATE tags.
  17
  18 Note that lame is retarded, and parses B<LANG> directly itself!  So, in order
  19 for it to transcode textual tags, you must specify the encoding in LANG, e.g.
  20 LANG=en_US.utf-8
  21
  22 =head1 OPTIONS
  23
  24 =over 4
  25
  26 =item B<--lame-options> I<lame-options>
  27
  28 Pass I<lame-options> to B<lame>.  This ends up being passed to the
  29 shell, so feel free to take advantage of that.  You'll almost
  30 certainly have to put I<lame-options> in single quotes.
  31
  32 =item B<-q> [B<--quiet>]
  33
  34 Suppress status information.  This option is passed along to B<flac>
  35 and B<lame>.
  36
  37 =item B<-v> [B<--verbose>]
  38
  39 Print diagnostic information.  This option is passed along to B<flac>
  40 and B<lame>.
  41
  42 =back
  43
  44 =head1 AUTHORS
  45
  46 Written by Eric Gillespie <epg@pretzelnet.org>.
  47
  48 =cut
  49
  50 package epg::flac::archive::mp3;
  51
  52 use v5.12;
  53 use warnings;
  54
  55 use File::Temp;
  56 use FindBin;
  57
  58 require "$FindBin::Bin/tags.pl";
  59 epg::flac::archive::tags->import(
  60     qw[
  61         disc_tags
  62         read_tags
  63         mangle_for_file_name
  64         quote
  65         two_digits
  66     ]);
  67
  68 sub flac2mp3 {
  69     my $quoted_flac = quote(shift);
  70     my $tags = shift;
  71     my ($artist, $album, $date, $discnumber) = disc_tags(%$tags);
  72
  73         # TODO resurrect whole-disc FLAC?
  74         # Stupid hack: only a single-track file should have the
  75         # TRACKNUMBER tag, so use it if set for the first pass through
  76         # the loop.  At the end of the loop, we'll set $track for the
  77         # next run, so this continues to work for multi-track files.
  78                 # if track == None:
  79                 #     track = 1
  80                 # else:
  81                 #     track = int(track)
  82
  83     my $tracknumber = epg::flac::archive::tags::one(TRACKNUMBER => $tags);
  84     my $title = epg::flac::archive::tags::one(TITLE => $tags);
  85     # TODO restore PARTNUMBER and VERSION next time i need them
  86
  87     say('metaflac --export-picture-to=flac2mp3.cover.$$', " $quoted_flac && pic_options=", '"--ti flac2mp3.cover.$$"');
  88
  89     # This is an old TODO; what's wrong with --ty ?
  90     # TODO: Look at TDOR, TDRL, TDRC for date.
  91     say(join(' ',
  92              'flac',
  93              '-cd',
  94              $quoted_flac,
  95              '|',
  96              'lame',
  97              '--id3v2-only',
  98              '--id3v2-latin1',
  99              '--pad-id3v2-size', 0,
 100              '--preset standard',
 101              '--ta',
 102              quote($artist),
 103              '--tl',
 104              quote($album),
 105              '--tn',
 106              quote($tracknumber),
 107              '--tt',
 108              quote($title),
 109              '--ty',
 110              quote($date),
 111              '$pic_options',
 112              #(map { ('--tv', quote("TPE2=$_")) } @{$albumartist}),
 113              (map { ('--tv', quote("TPOS=$_")) } @{$discnumber}),
 114              '-',
 115              quote(
 116                  mangle_for_file_name(
 117                      join(' ',
 118                           $artist,
 119                           $album,
 120                           (map { two_digits($_) } @{$discnumber}),
 121                           two_digits($tracknumber),
 122                           $title,
 123                      ))
 124                  . '.mp3'
 125              )
 126         ));
 127     say('unset pic_options');
 128 }
 129
 130 sub read_tags_metaflac {
 131     my $fn = shift;
 132     open(my $fh, '-|', 'metaflac', '--no-utf8-convert', '--export-tags-to=-', $fn) || die("metalfac: $!");
 133     my @result = read_tags($fh);
 134     if (!close($fh)) {
 135         if ($! == 0) {
 136             die("metaflac exited $?")
 137         }
 138         die("close(metaflac): $!")
 139     }
 140     @result
 141 }
 142
 143 sub main {
 144     for my $fn (@_) {
 145         my ($tags) = read_tags_metaflac($fn);
 146         flac2mp3($fn, $tags);
 147     }
 148     say('rm -f flac2mp3.cover.$$');
 149
 150     return 0;
 151 }
 152
 153 if (!caller) {
 154     exit(main(@ARGV))
 155 }
 156
 157 1;