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     ]);
  66
  67 sub flac2mp3 {
  68     my $quoted_flac = quote(shift);
  69     my $tags = shift;
  70     my ($album, $artist, $date, $discnumber) = disc_tags($tags);
  71
  72         # TODO resurrect whole-disc FLAC?
  73         # Stupid hack: only a single-track file should have the
  74         # TRACKNUMBER tag, so use it if set for the first pass through
  75         # the loop.  At the end of the loop, we'll set $track for the
  76         # next run, so this continues to work for multi-track files.
  77                 # if track == None:
  78                 #     track = 1
  79                 # else:
  80                 #     track = int(track)
  81
  82     my $tracknumber = epg::flac::archive::tags::one(TRACKNUMBER => $tags);
  83     my $title = epg::flac::archive::tags::one(TITLE => $tags);
  84     # TODO restore PARTNUMBER and VERSION next time i need them
  85
  86     say('metaflac --export-picture-to=flac2mp3.cover.$$', " $quoted_flac && pic_options=", '"--ti flac2mp3.cover.$$"');
  87
  88     # This is an old TODO; what's wrong with --ty ?
  89     # TODO: Look at TDOR, TDRL, TDRC for date.
  90     say(join(' ',
  91              'flac',
  92              '-cd',
  93              $quoted_flac,
  94              '|',
  95              'lame',
  96              '--id3v2-only',
  97              '--id3v2-latin1',
  98              '--pad-id3v2-size', 0,
  99              '--preset standard',
 100              '--ta',
 101              quote($artist),
 102              '--tl',
 103              quote($album),
 104              '--tn',
 105              quote($tracknumber),
 106              '--tt',
 107              quote($title),
 108              '--ty',
 109              quote($date),
 110              '$pic_options',
 111              #(map { ('--tv', quote("TPE2=$_")) } @{$albumartist}),
 112              (map { ('--tv', quote("TPOS=$_")) } @{$discnumber}),
 113              '-',
 114              quote(
 115                  mangle_for_file_name(
 116                      join(' ',
 117                           $artist,
 118                           $album,
 119                           (map { sprintf('%02d', $_) } @{$discnumber}),
 120                           $tracknumber,
 121                           $title,
 122                      ))
 123                  . '.mp3'
 124              )
 125         ));
 126     say('unset pic_options');
 127 }
 128
 129 sub read_tags_metaflac {
 130     my $fn = shift;
 131     open(my $fh, '-|', 'metaflac', '--no-utf8-convert', '--export-tags-to=-', $fn) || die("metalfac: $!");
 132     my @result = read_tags($fh);
 133     if (!close($fh)) {
 134         if ($! == 0) {
 135             die("metaflac exited $?")
 136         }
 137         die("close(metaflac): $!")
 138     }
 139     @result
 140 }
 141
 142 sub main {
 143     for my $fn (@_) {
 144         my ($tags) = read_tags_metaflac($fn);
 145         flac2mp3($fn, $tags);
 146     }
 147     say('rm -f flac2mp3.cover.$$');
 148
 149     return 0;
 150 }
 151
 152 if (!caller) {
 153     exit(main(@ARGV))
 154 }
 155
 156 1;