summaryrefslogtreecommitdiff
path: root/PLUGINS/src/pictures/pic2mpg
blob: bcafcf52ace6e01d1e4b4dae77ae512162386c23 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
#!/usr/bin/perl

# pic2mpg: Convert picture files to MPEG still frames
#
# Converts either a single picture file or all files in a
# given directory (recursively) to MPEG still frames.
#
# See the README file for copyright information and how to reach the author.
#
# $Id: pic2mpg 1.3 2008/02/24 22:00:18 kls Exp $

## TODO implement HDTV (1920 x 1080)

use File::Path;
use Getopt::Std;
use Image::Size;

$Usage = qq{
Usage: $0 [options] picture-dir mpeg-dir
       $0 [options] picture-file mpeg-file

Options: -a             Aspect ratio 4:3 (default is 16:9)
         -f             Force conversion
         -h             print Help
         -i             Ignore unknown file types
         -n             NTSC (default is PAL)
         -v num         Verbose (0=none, 1=list files, 2=detailed)
         -x percent     X overscan in percent
         -y percent     Y overscan in percent
};

getopts("afhinv:x:y:") || die $Usage;

die $Usage if $opt_h;

$Aspect    = $opt_a;
$Force     = $opt_f;
$Ignore    = $opt_i;
$NTSC      = $opt_n;
$Verbose   = $opt_v;
$OverscanX = $opt_x;
$OverscanY = $opt_y;

$ListFiles = $Verbose >= 1;
$Detailed  = $Verbose >= 2;

# Screen size:

$SW = $NTSC ? 720 : 720;
$SH = $NTSC ? 480 : 576;

$ScreenRatio = $Aspect ? 4 / 3 : 16 / 9;

# Converter programs:

%PNMCONV = (
  bmp  => "bmptopnm",
  gif  => "giftopnm",
  jpeg => "jpegtopnm",
  jpg  => "jpegtopnm",
  png  => "pngtopnm",
  pnm  => "cat",
  tif  => "tifftopnm",
  tiff => "tifftopnm",
  );

# Command options:

die "$0: missing parameter\n" unless $ARGV[0] && $ARGV[1];
die "$0: file or directory not found: $ARGV[0]\n" unless -e $ARGV[0];
die "$0: source and destination must be different\n" if $ARGV[0] eq $ARGV[1];

$verbose1  = $Detailed ? "--verbose" : "";
$verbose2  = $Detailed ? "-v 2" : "-v 0";
$system1   = $NTSC ? "" : "--pal";
$system2   = $NTSC ? "n" : "p";
$framerate = $NTSC ? "30000:1001" : "25:1";
$aspect    = $Aspect ? "2" : "3";

# Convert a single file:

if (-f $ARGV[0]) {
   die "$0: mixed file and directory ('$ARGV[0]' <-> '$ARGV[1]')\n" unless !-e $ARGV[1] || -f $ARGV[1];
   ConvertFile($ARGV[0], $ARGV[1]);
   exit;
   }

die "$0: mixed directory and file ('$ARGV[0]' <-> '$ARGV[1]')\n" unless !-e $ARGV[1] || -d $ARGV[1];

$PICDIR = $ARGV[0];
$MPGDIR = $ARGV[1];

# Convert pictures to mpegs:

chdir($PICDIR) || die "$PICDIR: $!\n";

@Pictures = `find -type f`;
chomp(@Pictures);

for $pic (@Pictures) {
    my $mpg = "$MPGDIR/$pic.mpg";
    if ($Force || !-e $mpg || -M $mpg > -M $pic) {
       (my $dir = $mpg) =~ s/\/[^\/]*$//;
       mkpath($dir);
       ConvertFile($pic, $mpg);
       }
    }

# Remove mpegs without pictures:

chdir($MPGDIR) || die "$MPGDIR: $!\n";

@Mpegs = `find -type f`;
chomp(@Mpegs);

for $mpg (@Mpegs) {
    my $pic = "$PICDIR/$mpg";
    $pic =~ s/\.mpg$//;
    if (!-e $pic) {
       print "removing $mpg\n";
       unlink($mpg);
       }
    }

# Remove empty directories:

chdir($MPGDIR) || die "$MPGDIR: $!\n";

for ($i = 0; $i < 10; $i++) { # dirs might become empty when removing empty subdirs
    @Dirs = `find -type d -empty`;
    chomp(@Dirs);
    last unless @Dirs;

    for $dir (@Dirs) {
        $dir = EscapeMeta($dir);
        print "removing $dir\n";
        !system("rm -rf $dir") || die "$dir: $!\n";
        }
    }

# Actual file conversion:

sub ConvertFile
{
  my ($Pict, $Mpeg) = @_;
  (my $Type) = lc($Pict) =~ /\.([^\.]*)$/;
  if (!defined $PNMCONV{$Type}) {
     return if ($Ignore);
     die "unknown file type '$Type': '$Pict'\n";
     }
  my ($w, $h) = imgsize($Pict);
  print "image size is $w x $h\n" if ($Detailed);
  if ($w / $h <= $ScreenRatio) {
     $w = $h * $ScreenRatio;
     }
  else {
     $h = $w / $ScreenRatio;
     }
  my $ScaleW = $SW / $w * (100 - 2 * $OverscanX) / 100;
  my $ScaleH = $SH / $h * (100 - 2 * $OverscanY) / 100;
  $Pict = EscapeMeta($Pict);
  $Mpeg = EscapeMeta($Mpeg);
  print "$Pict -> $Mpeg\n" if $ListFiles;
  my $Cmd = "$PNMCONV{$Type} $Pict 2> /dev/null |"
          . "pnmscale $verbose1 --xscale=$ScaleW --yscale=$ScaleH |"
          . "pnmpad $verbose1 --black --width $SW --height $SH |"
          . "ppmntsc $verbose1 $system1 |"
          . "ppmtoy4m $verbose2 -F $framerate -I p -S 420mpeg2 |"
          . "mpeg2enc $verbose2 -f 3 -b 12500 -a $aspect -q 1 -n $system2 -o $Mpeg";
  !system($Cmd) || die "$Cmd: $!\n";
  $Cmd = "touch -r $Pict $Mpeg";
  !system($Cmd) || die "$Cmd: $!\n";
}

sub EscapeMeta
{
  my $META = ' !"#$%&\'()*;<>?[\\]`{|}~';
  my $s = shift;
  $s =~ s/([$META])/\\$1/g;
  return $s;
}