1 | ###########################################################################
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2 | #
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3 | # imageconvert.pm -- utility to help convert image file
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4 | # used by ImagePlug, PagedImgPlug ...
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5 | #
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6 | # Copyright (C) 1999 DigiLib Systems Limited, NZ
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7 | #
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8 | # This program is free software; you can redistribute it and/or modify
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9 | # it under the terms of the GNU General Public License as published by
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10 | # the Free Software Foundation; either version 2 of the License, or
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11 | # (at your option) any later version.
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12 | #
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13 | # This program is distributed in the hope that it will be useful,
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14 | # but WITHOUT ANY WARRANTY; without even the implied warranty of
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15 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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16 | # GNU General Public License for more details.
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17 | #
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18 | # You should have received a copy of the GNU General Public License
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19 | # along with this program; if not, write to the Free Software
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20 | # Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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21 | #
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22 | ###########################################################################
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23 |
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24 |
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25 | package imageconvert;
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26 |
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27 | use strict;
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28 | no strict 'refs'; # allow filehandles to be variables and viceversa
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29 |
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30 |
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31 | use baseconvert;
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32 |
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33 | sub BEGIN {
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34 | @imageconvert::ISA = ('baseconvert');
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35 | }
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36 |
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37 |
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38 |
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39 | # Discover the characteristics of an image file with the ImageMagick
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40 | # "identify" command.
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41 |
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42 | sub identify {
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43 | my ($image, $outhandle, $verbosity) = @_;
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44 |
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45 | # Use the ImageMagick "identify" command to get the file specs
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46 | my $command = "identify \"$image\" 2>&1";
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47 | print $outhandle "$command\n" if ($verbosity > 2);
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48 | my $result = '';
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49 | $result = `$command`;
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50 | print $outhandle "$result\n" if ($verbosity > 3);
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51 |
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52 | # Read the type, width, and height
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53 | my $type = 'unknown';
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54 | my $width = 'unknown';
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55 | my $height = 'unknown';
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56 |
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57 | my $image_safe = quotemeta $image;
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58 | if ($result =~ /^$image_safe (\w+) (\d+)x(\d+)/) {
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59 | $type = $1;
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60 | $width = $2;
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61 | $height = $3;
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62 | }
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63 |
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64 | # Read the size
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65 | my $size = "unknown";
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66 | if ($result =~ m/^.* ([0-9]+)b/) {
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67 | $size = $1;
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68 | } elsif ($result =~ m/^.* ([0-9]+)kb/) {
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69 | $size = 1024 * $1;
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70 | }
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71 |
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72 | print $outhandle "file: $image:\t $type, $width, $height, $size\n"
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73 | if ($verbosity > 3);
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74 |
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75 | # Return the specs
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76 | return ($type, $width, $height, $size);
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77 | }
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78 |
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79 |
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80 |
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81 |
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82 | sub new {
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83 | my ($class) = shift @_;
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84 |
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85 | my ($base_dir,$image_filename,$verbosity,$outhandle) = @_;
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86 |
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87 | my $self = new baseconvert($base_dir,$image_filename,$verbosity,$outhandle);
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88 |
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89 | return bless $self, $class;
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90 | }
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91 |
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92 |
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93 | sub stream_cmd_XXXX
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94 | {
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95 | my $self = shift (@_);
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96 | my ($ivideo_filename,$video_width,$video_height,
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97 | $streaming_bitrate,$streaming_size,
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98 | $opt_streaming_achan, $opt_streaming_arate) = @_;
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99 |
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100 | my $streaming_achan
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101 | = (defined $opt_streaming_achan) ? $opt_streaming_achan : 2;
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102 |
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103 | my $streaming_arate
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104 | = (defined $opt_streaming_arate) ? $opt_streaming_arate : 22050;
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105 |
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106 | my $output_dir = $self->{'cached_dir'};
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107 | my $ivideo_root = $self->{'file_root'};
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108 |
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109 | my $oflash_file = "${ivideo_root}_stream.flv";
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110 | my $oflash_filename = &util::filename_cat($output_dir,$oflash_file);
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111 |
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112 | my $s_opt = $self->optional_frame_scale($streaming_size,$video_width,$video_height);
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113 |
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114 | my $exp_duration = $self->{'exp_duration'};
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115 | my $t_opt = (defined $exp_duration) ? "-t $exp_duration" : "";
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116 |
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117 | my $main_opts = "-y $t_opt";
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118 |
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119 | my $stream_opts = "-b $streaming_bitrate $s_opt";
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120 | ### my $stream_opts = "-r 25 $s_opt";
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121 | $stream_opts .= " -ac $streaming_achan -ar $streaming_arate";
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122 | $stream_opts .= " -pass 1/2";
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123 |
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124 | # -flags +ilme+ildct' and maybe '-flags +alt' for interlaced material, and try '-top 0/1'
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125 |
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126 | my $all_opts = "$main_opts $stream_opts";
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127 | my $ffmpeg_cmd = "ffmpeg -i \"$ivideo_filename\" $all_opts -y \"$oflash_filename\"";
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128 |
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129 | return ($ffmpeg_cmd,$oflash_filename,$oflash_file);
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130 | }
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131 |
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132 |
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133 |
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134 |
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135 |
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136 |
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137 |
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138 |
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139 |
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140 | 1;
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