root/extensions/gsdl-video/trunk/perllib/plugins/TimedHTMLPlugin.pm @ 18425

Revision 18425, 26.4 KB (checked in by davidb, 11 years ago)

Video extension to Greenstone

Line 
1###########################################################################
2#
3# TimedHTMLPlug.pm --
4#
5# A component of the Greenstone digital library software
6# from the New Zealand Digital Library Project at the
7# University of Waikato, New Zealand.
8#
9# Copyright (C) 1999 New Zealand Digital Library Project
10#
11# This program is free software; you can redistribute it and/or modify
12# it under the terms of the GNU General Public License as published by
13# the Free Software Foundation; either version 2 of the License, or
14# (at your option) any later version.
15#
16# This program is distributed in the hope that it will be useful,
17# but WITHOUT ANY WARRANTY; without even the implied warranty of
18# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
19# GNU General Public License for more details.
20#
21# You should have received a copy of the GNU General Public License
22# along with this program; if not, write to the Free Software
23# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24#
25###########################################################################
26
27
28package TimedHTMLPlugin;
29
30use videoconvert;
31
32use HTMLPlugin;
33
34sub BEGIN {
35    @TimedHTMLPlugin::ISA = ('HTMLPlugin');
36}
37
38use strict; # every perl program should have this!
39no strict 'refs'; # make an exception so we can use variables as filehandles
40
41my $arguments =
42    [
43      { 'name' => "video_excerpt_duration",
44    'desc' => "{VideoPlug.video_excerpt_duration}",
45    'type' => "string",
46    'reqd' => "no" }
47      ];
48
49
50
51
52my $options = { 'name'     => "TimedHTMLPlugin",
53        'desc'     => "{TimedHTMLPlugin.desc}",
54        'abstract' => "no",
55        'inherits' => "yes",
56            'args'     => $arguments };
57
58
59sub new {
60    my ($class) = shift (@_);
61    my ($pluginlist,$inputargs,$hashArgOptLists) = @_;
62    push(@$pluginlist, $class);
63   
64    if(defined $arguments){ push(@{$hashArgOptLists->{"ArgList"}},@{$arguments});}
65    if(defined $options) { push(@{$hashArgOptLists->{"OptList"}},$options)};
66   
67
68    my $self = (defined $hashArgOptLists)
69    ? new HTMLPlugin($pluginlist,$inputargs,$hashArgOptLists)
70    : new HTMLPlugin($pluginlist,$inputargs);
71   
72    my $collect_dir = $ENV{'GSDLCOLLECTDIR'};
73
74    my $collect_bin = &util::filename_cat($collect_dir,"bin");
75    my $collect_script = &util::filename_cat($collect_bin,"script");
76   
77    $ENV{'PATH'} .= ":" if (defined $ENV{'PATH'});
78    $ENV{'PATH'} .= "$collect_bin:$collect_script";
79
80    return bless $self, $class;
81}
82
83sub html_to_text
84{
85    my ($self, $text) = @_;
86
87    $text =~ s/<\/?[^>]*>//g;
88
89    $text =~ s/&nbsp;/ /g;
90
91    $text =~ s/\s+/ /gs;
92    $text =~ s/^\s+//;
93    $text =~ s/\s+$//;
94
95    return $text;
96}
97
98
99sub extract_metadata_table
100{
101    my ($self, $textref) = @_;
102
103    my $metatable_store = {};
104
105    my $metatable_re = "<table([^>]*)>(.*?<p class=\"?Metadata\"?>.*?)<\\/table>";
106
107    if ($$textref =~ m/$metatable_re/gsi) {
108    my $metatable_attr = $1;
109    my $metatable_body = $2;
110
111    my @tr_list = ($metatable_body =~ m/(<tr[^>]*>.*?<\/tr>)/gsi);
112
113    my @filtered_tr_list = ();
114
115    foreach my $tr (@tr_list) {
116
117        my $in_filtered_tr = 1;
118
119        my @td_list = ($tr =~ m/<td[^>]*>(.*?)<\/td>/gsi);
120        my $td_list_num = scalar(@td_list);
121       
122        if ($td_list_num == 2) {
123        my $meta_name  = $self->html_to_text($td_list[0]);
124        my $meta_value = $self->html_to_text($td_list[1]);
125       
126        $meta_name =~ s/\s*//g;
127       
128
129        if ($meta_value =~ m/^(\s*|\?+)$/) {
130            $in_filtered_tr = 0;
131        }
132        else {
133            my $meta_name_label = $meta_name;
134            $meta_name_label =~ s/\s+//g;
135
136            $metatable_store->{$meta_name_label} = $meta_value;
137
138            if ($meta_name_label =~ m/^GS\./) {
139            # even though we want to store this as metadata, we
140            # don't want this going into table presented at top of document
141            $in_filtered_tr = 0;
142            }
143
144        }
145        }
146        else {
147        print STDERR "Warning: Metadata table does not consist of two cells (metadata name : metadata value)\n";
148        print STDERR "         Skipping\n";
149        }
150
151
152        if ($in_filtered_tr) {
153        push(@filtered_tr_list,$tr);
154        }
155    }
156
157    my $filtered_tr_block = join("\n",@filtered_tr_list);
158    my $filtered_table = "<table$metatable_attr>$filtered_tr_block</table>";
159
160
161    ### my $metatable_re = "<table[^>]*>.*?<p class=\"?Metadata\"?>.*?<\\/table>";
162
163### print STDERR "*** filtered table = $filtered_table\n";
164
165    $$textref =~ s/$metatable_re/$filtered_table/si;
166   
167    }
168
169    return $metatable_store;
170
171}
172
173
174
175
176
177my $only_num = 0;
178my $only_limit = 100;
179
180sub hms_to_secs
181{
182    my $self = shift @_;
183    my ($hh,$mm,$ss) = @_;
184
185    return $hh*3600 + $mm*60 + $ss;
186}
187
188
189
190sub timed_event
191{
192    my $self = shift (@_);
193
194    my ($front, $tape, $hh, $mm, $ss, $back) = @_;
195
196    my $time_encoded = "$hh:$mm:$ss";
197    my $time_encoded_file = "$hh$mm$ss";
198
199    my $time_pos = $self->{'time_pos'};
200    my $time_num = scalar(@{$self->{'time_seq'}});
201
202    my $videoconvert = $self->{'videoconvert'};
203
204    # excerpt from tim_pos -> time_pos + 2;
205    my $adv_time_pos = $time_pos+2;
206    $adv_time_pos = $time_num-1 if ($adv_time_pos>=$time_num);
207
208    my $adv_time_elem = $self->{'time_seq'}->[$adv_time_pos];
209
210#    print STDERR "*** ", substr($adv_time_elem,0,800), "\n";
211
212    my ($atape,$ah,$am,$as) = ($adv_time_elem =~ m/(T\d+:) ?(\d\d):(\d\d):(\d\d)(?:\:\d\d)?/);
213
214    my $excerpt_len = undef;
215    my $time_in_secs     = $self->hms_to_secs($hh,$mm,$ss);
216
217    if (!defined $tape) {
218    if (defined $self->{'ptape'}) {
219        $tape = $self->{'ptape'};
220    }
221    else {
222        print STDERR "Warning: First time offset does not define tape side\n";
223        print STDERR "         Defaulting to 1\n";
224        $tape = "T1:";
225    }
226    }
227
228    if (!defined $atape) {
229    $atape = "T1";
230    }
231
232#    print STDERR "**** atape = $atape\n";
233#    print STDERR "*** tape = $tape\n";
234
235    if ($atape eq $tape) {
236    my $adv_time_in_secs = $self->hms_to_secs($ah,$am,$as);
237
238    $excerpt_len = $adv_time_in_secs - $time_in_secs;
239    }
240
241    my $collect_dir = $ENV{'GSDLCOLLECTDIR'};
242
243    my $media_type = $self->{'media_type'};
244    my $media_dir  = $self->{'media_dir'};
245    my $media_root = $self->{'media_root'};
246
247    my $media_base_dir = $self->{'media_base_dir'};
248
249    my $mp3_html;   
250    my $avi_html;
251
252    my $tape_num = "1";
253
254    if (defined $media_type) {
255
256    my $src_file;
257    my $src_filename;
258
259    if ($media_type eq "video") {
260        $src_file = "$media_root\_01_$tape_num.VOB";
261        $src_filename
262        = &util::filename_cat($media_base_dir, $src_file);
263    }
264    elsif ($media_type =~ m/^audio$/) {
265        $src_file = "$media_root\_Tape$tape_num.mp3";
266        $src_filename
267        = &util::filename_cat($media_base_dir, $src_file);
268    }
269    else {
270        print STDERR "Warning: Unrecognised media type: $media_type\n";
271    }
272
273
274    if ($media_type eq "video") {
275
276        # video excerpt
277
278        my $encoded_file = "$media_dir\_$time_encoded_file.avi";
279
280        my $ve_filename
281        = &util::filename_cat($collect_dir,"media","video_excerpt",$encoded_file);
282
283        if ($only_num < $only_limit) {
284        if (! -e $ve_filename) {
285            # my $args = "-vcodec mpeg2video";
286            my $args = "-vcodec msmpeg4";
287           
288            my $ve_cmd = "gsmpeg.sh -v 1 -i $src_filename $args -ss $time_encoded ";
289           
290            if (defined $excerpt_len) {
291            $ve_cmd .= "-t $excerpt_len ";
292            }
293           
294            $ve_cmd .= $ve_filename;
295           
296##          print STDERR "$ve_cmd\n";
297           
298##          `$ve_cmd`;
299        }
300           
301##      my $avi_url = "http://mcgonagall.cs.waikato.ac.nz:8201/gsdl/collect/hauraki2/media/video_excerpt/$media_dir\_$time_encoded_file.avi";
302        my $avi_url = "_httpprefix_/collect/hauraki2/media/video_excerpt/$media_dir\_$time_encoded_file.avi";
303       
304##      $avi_html = "<a class=\"mm\" href=\"$avi_url\"><img border=1 src=\"_httpcimages_\/video5.gif\"></a>";
305       
306       
307        ## my $stream_url = "_httpstreamserver_/$local_root.asf";
308##      my $stream_url = "http://mcgonagall.cs.waikato.ac.nz:8090/$local_root.avi";
309##      $avi_html .= "<a class=\"mm\" href=\"$stream_url\">Stream</a>";
310
311
312        ## $avi_html .= "<a class=\"mm\" href=\"_httpcurrentdocumentwithvplayer_\"><img border=1 src=\"_httpcimages_\/video5.gif\"></a>";
313
314        $avi_html .= "<a class=\"mm\" href=\"javascript:videoplayerseek($hh,$mm,$ss)\"><img border=1 src=\"_httpcimages_\/video5.gif\"></a>";
315
316        # save 'time-stamp' as metadata???
317       
318
319
320        }
321        else {
322        $avi_html = "<img src=\"_httpcimages_\/video5.gif\">";
323        }
324    }
325
326    if ($media_type =~ m/^(video|audio)$/) {
327
328        # audio excerpt
329#       my $encoded_file = "$media_dir\_$time_encoded_file.mp3";
330
331#       ## my $src_file = "$media_root\_Tape$tape_num.avi";
332
333#       #my $src_filename
334#       #   = &util::filename_cat($collect_dir,"media",$media_type ,$media_dir, $src_file);
335
336#       my $ae_filename
337#       = &util::filename_cat($collect_dir,"media","audio_excerpt",$encoded_file);
338
339
340        if ($only_num < $only_limit) {
341
342        $excerpt_len = 120 if (!defined $excerpt_len); #######
343
344        my ($ae_cmd,$omp3_filename,$omp3_file)
345            = $videoconvert->audio_excerpt_cmd($src_filename,
346                               $hh,$mm,$ss,$excerpt_len);
347       
348        my $ae_options = { @{$videoconvert->{'ffmpeg_monitor'}},
349                   'message_prefix' => "Audio Excerpt",
350                   'message' => "Generating audio excerpt: $omp3_file" };
351       
352        my ($ae_regenerated,$ae_result,$ae_had_error)
353            = $videoconvert->run_cached_general_cmd($ae_cmd,$omp3_filename,$ae_options);
354
355        push(@{$self->{'mp3_excerpts'}}, { 'omp3_file' => $omp3_file, 'omp3_filename' => $omp3_filename} );
356
357        }
358
359
360
361
362        #    if (! -e $ae_filename) {
363        if ($only_num < $only_limit) {
364#       if (! -e $ae_filename) {
365           
366#           my $args = "-acodec mp3";
367           
368#           ## my $src_filename = "media/video/mirth/VTS_01_1.avi";
369#           my $ae_cmd = "gsmpeg.sh -v 1 -i $src_filename $args -ss $time_encoded ";
370           
371#           if (defined $excerpt_len) {
372#           $ae_cmd .= "-t $excerpt_len ";
373#           }
374           
375#           $ae_cmd .= $ae_filename;
376                                   
377##          print STDERR "$ae_cmd\n";
378           
379##          `$ae_cmd`;
380#       }
381       
382       
383##      my $mp3_url = "http://mcgonagall.cs.waikato.ac.nz:8201/gsdl/collect/hauraki2/media/audio_excerpt/$media_dir\_$time_encoded_file.mp3";
384#       my $mp3_url = "_httpprefix_/collect/hauraki2/media/audio_excerpt/$media_dir\_$time_encoded_file.mp3";
385   
386        my ($voa_root) = ($src_file =~ m/^(.*)\..*?$/);
387   
388        my $mp3_url = "javascript:audioexcerptplay('$voa_root','$hh','$mm','$ss')";
389
390#       my $mp3_url = "_httpcollection_/index/assoc/{If}{[assocfilepath],[assocfilepath],[parent(Top):assocfilepath]}/$media_dir\_$time_encoded_file.mp3";
391
392        $mp3_html = "<a class=\"mm\" href=\"$mp3_url\"><img border=1 src=\"_httpcimages_\/audio2.gif\"></a>";
393
394#       my $baseexcerpt_url = "_httpcollection_/index/assoc/{If}{[assocfilepath],[assocfilepath],[parent(Top):assocfilepath]}";
395       
396#####       $doc_obj->add_metadata ($section, "audioexcerpturl",$mp3_url);
397       
398       
399        }
400        else {
401        $mp3_html = "<img src=\"_httpcimages_\/audio2.gif\">";
402       
403        }
404    }
405    }
406    else {
407    print STDERR "Warning: no media type defined.\n";
408    }
409
410
411    $only_num++;
412
413    $self->{'time_pos'}++;
414
415    my $table = "<table width=\"100%\" cellspacing=\"1\" cellpadding=\"0\"><tr valign=\"middle\">";
416    $table .= "<td>$avi_html</td>" if (defined $avi_html);
417    $table .= "<td>$mp3_html</td>";
418    $table .= "<td>$time_encoded</td>";
419    $table .= "</tr></table>";
420
421    # my $line = "$front$avi_html&nbsp;$mp3_html&nbsp;$time_encoded$back";
422
423    my $line = "$front$table$back";
424
425    # Remember tape prefix for next call
426    $self->{'ptape'} = $tape;
427
428    return $line;
429}
430
431
432sub hyperlink_timing_info
433{
434    my ($self, $textref) = @_;
435
436    my $media_type = $self->{'media_type'};
437    my $media_dir  = $self->{'media_dir'};
438    my $media_root = $self->{'media_root'};
439
440    my $front_re = "<p class=Timing><span\\s+.*?>";
441    my $tape_re  = "T\\d+:";
442    my $tt_re = "\\d\\d";
443    my $back_re = ".*?<\\/span>";
444
445    my $time_match_re = "$front_re$tt_re:$tt_re:$tt_re$back_re(?:\:$tt_re)?";
446    # my $time_sub_re   = "($front_re)($tape_re)? ?($tt_re):($tt_re):($tt_re)(?:\:$tt_re)?($back_re)";
447
448    my $tape_match_re   = "$front_re($tape_re)? ?$tt_re:$tt_re:$tt_re(?:\:$tt_re)?$back_re";
449    my $tape_sub_re   = "($front_re)($tt_re):($tt_re):($tt_re)(?:\:$tt_re)?($back_re)";
450
451
452
453    my @time_seq = ($$textref =~ m/$time_match_re/sgi);
454
455    # artifically add tape information into all time indexes
456    my $extrapolate_tape = "";
457    my $num_seq = scalar(@time_seq);
458    for (my $i=0; $i<$num_seq; $i++) {
459    my ($curr_tape) = ($time_seq[$i] =~ m/$tape_match_re/sgi);
460    if (!defined $curr_tape) {
461        $time_seq[$i] =~ s/$tape_sub_re/$1$extrapolate_tape$2:$3:$4$5/sgi;
462    }
463    else {
464        if ($curr_tape ne $extrapolate_tape) {
465        $extrapolate_tape = $curr_tape;
466        }
467    }
468    }
469
470
471    $self->{'time_seq'} = \@time_seq;
472    $self->{'time_pos'} = 0;
473
474    $$textref =~ s/(<p class=Timing><span\s+.*?>)(T\d+:)? ?(\d\d):(\d\d):(\d\d)(?:\:\d\d)?.*?(<\/span>)/$self->timed_event($1,$2,$3,$4,$5,$6)/sgie;
475
476
477    # knock out any div tags as they interfere with document broken up into sections
478    $$textref =~ s/<\/?div.*?>//gi;
479
480    # Embedded word style infomation is lost by HTMLPlug => make Question
481    # style use HTML italics
482
483    $$textref =~ s/<p class=\"Question\">(.*?)<\/p>/<p><i>$1<\/i><\/p>/gsi;
484
485}
486
487
488
489sub store_block_files
490{
491    my $self =shift (@_);
492    my ($filename_full_path, $block_hash) = @_;
493
494    # Would be better if this were tied to particular HTML docs that
495    # this plugin has processed.
496
497    # For now block all files native to DVD format
498
499    if (($filename_full_path =~ m/\.(IFO|BUP)$/)        # block info and backup-info data
500    || ($filename_full_path =~ m/VIDEO_TS\..*?$/)   # block top-level files
501    || ($filename_full_path =~ m/VTS_\d\d_\d\.VOB$/) #
502    ) {
503   
504    $block_hash->{'file_blocks'}->{$filename_full_path} = 1;
505    }
506}
507
508sub read_block {
509    my $self = shift (@_); 
510 
511    my ($pluginfo, $base_dir, $file, $metadata, $processor, $maxdocs, $total_count, $gli) = @_;
512
513    print STDERR "***** TimedHTMLPlugin read_block\n";
514
515    my $filename = $file;
516    $filename = &util::filename_cat ($base_dir, $file) if $base_dir =~ /\w/;
517
518    if (($filename =~ m/\.(IFO|BUP)$/)        # block info and backup-info data
519    || ($filename =~ m/VIDEO_TS\..*?$/)   # block top-level files
520    || ($filename =~ m/VTS_\d\d_\d\.VOB$/) #
521    ) {
522    $self->{'num_blocked'} ++;
523    return (0,undef); # blocked
524    }
525
526
527#####   || ($filename =~ m/VTS_\d\d_0\.VOB$/) # block menu item for this track
528
529
530    if (defined $self->{'file_blocks'}->{$filename} && $self->{'file_blocks'}->{$filename} == 1){
531    $self->{'num_blocked'} ++;
532    return (0,undef); # blocked
533    }
534
535
536    if (defined $self->{'re_file_block'}) {
537    my $re_file_blocks = $self->{'re_file_block'};
538    foreach my $re_file_block (@$re_file_blocks) {
539###     print STDERR "**** re file block: $filename =~ m $re_file_block\n";
540        if ($filename =~ m/$re_file_block/) {
541###     print STDERR "*** blocking $filename\n";
542
543        $self->{'num_blocked'} ++;
544        return (0,undef); # blocked
545        }
546    }
547    }
548
549
550    return $self->SUPER::read_block(@_);
551
552}
553
554
555sub read_file {
556    my $self = shift @_;
557    my ($filename, $encoding, $language, $textref) = @_;
558
559    $only_num = 0;
560
561    $self->SUPER::read_file(@_);
562
563    my $metatable_store = $self->extract_metadata_table($textref);
564    $self->{'metatable_store'} = $metatable_store;
565
566    my ($root, $dirname, $suffix)
567        = &File::Basename::fileparse($filename, "\\.[^\\.]+\$");
568   
569    # media defaults
570    my $media_type = undef;
571    my $media_dir  = $root;
572    ## my $media_root = "VTS_%02d_%02d";
573    my $media_root = "VTS";
574
575    if (defined $metatable_store->{'GS.Media'}) {
576    $media_type = $metatable_store->{'GS.Media'};
577    $media_type = lc($media_type);
578    }
579    if (defined $metatable_store->{'GS.MediaDirectory'}) {
580    $media_dir = $metatable_store->{'GS.MediaDirectory'};
581    }
582    if (defined $metatable_store->{'GS.MediaRoot'}) {
583    $media_root = $metatable_store->{'GS.MediaRoot'};
584    }
585
586    $self->{'media_type'} = $media_type;
587    $self->{'media_dir'}  = $media_dir;
588    $self->{'media_root'} = $media_root;
589
590    my $media_base_dir = &util::filename_cat($dirname,$media_dir);
591    $self->{'media_base_dir'} = $media_base_dir;
592
593    $self->{'vob_duration_info'} = &videoconvert::vob_durations($media_base_dir,"1",$self->{'outhandle'});
594
595##    $self->hyperlink_timing_info($textref);
596
597    # Convert entities to their UTF8 equivalents
598    $$textref =~ s/&(lt|gt|amp|quot|nbsp);/&z$1;/go;
599    $$textref =~ s/&([^;]+);/&ghtml::getcharequiv($1,1)/gseo;
600    $$textref =~ s/&z(lt|gt|amp|quot|nbsp);/&$1;/go;
601}
602
603
604sub streamable_video
605{
606    my $self = shift (@_);
607
608    my ($base_dir,$filename,$doc_obj,$section) = @_;
609
610    my $outhandle = $self->{'outhandle'};
611    my $verbosity = $self->{'verbosity'};
612
613    my $media_base_dir = $self->{'media_base_dir'};
614
615    #---
616    # Determine size of input video
617
618    my $collect_dir = $ENV{'GSDLCOLLECTDIR'};
619
620    my $media_type = $self->{'media_type'};
621    my $media_dir  = $self->{'media_dir'};
622    my $media_root = $self->{'media_root'};
623
624    my $tape_num = "1";
625
626    my $src_file;
627    my $src_filename;
628
629    if ($media_type eq "video") {
630    $src_file = "$media_root\_01_$tape_num.VOB";
631    $src_filename
632        = &util::filename_cat($media_base_dir, $src_file);
633    }
634    elsif ($media_type =~ m/^audio$/) {
635    $src_file = "$media_root\_Tape$tape_num.mp3";
636    $src_filename
637        = &util::filename_cat($media_base_dir, $src_file);
638    }
639    else {
640    print STDERR "Warning: Unrecognised media type: $media_type\n";
641    }
642
643    if (-e $src_filename) {
644    $self->{'file_blocks'}->{$src_filename} = 1;
645
646    my $re_file_block = $src_filename;
647    $re_file_block =~ s/_01_$tape_num.VOB$/_\\d+_\\d+.VOB\$/;
648   
649   
650    push(@{$self->{'re_file_block'}},$re_file_block);
651    }
652
653    my ($video_type, $video_width, $video_height, $video_duration, $video_size,
654    $vcodec,$vfps,$atype,$afreq,$achan,$arate)
655    = &videoconvert::identify($src_filename, $outhandle, $verbosity);
656
657    if ($vfps eq "unknown") {
658    print $outhandle "Unknown framerate, defaulting to 25 frames per second.\n";
659    $vfps = 25;
660    }
661
662###    print STDERR "*** video duration = $video_duration\n";
663    my ($dur_hour,$dur_min,$dur_sec)
664    = ($video_duration =~ m/(\d+):(\d+):(\d+\.\d+)/);
665    my $total_dur_secs = $dur_hour*3600 + $dur_min*60 + $dur_sec;
666
667    $self->{'video-fps'} = $vfps;
668    $self->{'num-total-frames'} = $total_dur_secs * $vfps;
669
670
671    # shorten duration prcessed for experimentation purposes
672    my $exp_duration = undef;
673
674    my $video_excerpt_duration = $self->{'video_excerpt_duration'};
675
676    print STDERR "**** video duration (secs) = $total_dur_secs\n";
677
678
679    if ((defined $video_excerpt_duration) && ($video_excerpt_duration ne "")) {
680    $exp_duration = $video_excerpt_duration;
681    my ($hh,$mm,$ss,$ms) = ($exp_duration =~ m/^(\d\d):(\d\d):(\d\d)\.?(\d\d)?/);
682    my $excerpt_dur_in_secs = $hh * 3600 + $mm * 60 + $ss;
683
684    if ($excerpt_dur_in_secs < $total_dur_secs) {
685        $self->{'num-total-frames'} = $excerpt_dur_in_secs * $vfps; # override calculation for full length duration
686    }
687    else {
688        # clip is already shorter than requested video excerpt duration
689        # set exp_duration back to undefined
690        $exp_duration = undef;
691    }
692    }
693
694    print $outhandle "TimedHTMLPlug: Preparing video files associated with $filename for HTMLPlug\n";
695
696    if (defined $exp_duration)
697    {
698    print $outhandle "Only encoding first $exp_duration of video.\n";
699    $self->{'exp_duration'} = $exp_duration;
700    }
701
702   
703    my $videoconvert
704    = new videoconvert($base_dir,$src_filename,$verbosity,$outhandle,$exp_duration);
705    $self->{'videoconvert'} = $videoconvert;
706
707    #---
708    # Generate the Flash FLV format for streaming purposes
709
710    my $streaming_bitrate = "256k"; # used to be 192k
711    my $streaming_size    = "360"; # used to be 352 (CIF?)
712    my $streaming_achan   = "1";
713    my $streaming_arate   = "44100";
714    my $streaming_quality = "high";
715
716    #---
717    # Convert video to flash
718    #---
719    my ($stream_cmd,$oflash_filename,$oflash_file)
720    = $videoconvert->stream_cmd($src_filename,
721                    $video_width,$video_height,
722                    $streaming_quality, $streaming_bitrate, $streaming_size,
723                    $streaming_achan, $streaming_arate);
724
725    my $streamable_options = { @{$videoconvert->{'ffmpeg_monitor'}},
726                   'message_prefix' => "Stream",
727                   'message' => "Generating streamable video: $oflash_file" };
728
729    my ($streamable_regenerated,$streamable_result,$streamable_had_error)
730    = $videoconvert->run_cached_general_cmd($stream_cmd,$oflash_filename,$streamable_options);
731
732    $self->{'streamable_regenerated'} = $streamable_regenerated;
733
734    if (!$streamable_had_error) {
735    #---
736    # Make video seekable
737    #---
738    my ($streamseekable_cmd,$ostreamseekable_filename) = $videoconvert->streamseekable_cmd($oflash_filename);
739   
740    my $streamseekable_options = { @{$videoconvert->{'flvtool2_monitor'}},
741                       'message_prefix' => "Stream Seekable",
742                       'message' => "Reprocessing video stream to be seekable by timeline: $oflash_file" };
743
744    if ($streamable_regenerated) {
745        $videoconvert->run_general_cmd($streamseekable_cmd,$streamseekable_options);
746    }
747
748    my $streamable_url = $oflash_file;
749##  $streamable_url =~ s/ /%20/g;
750
751    $doc_obj->add_metadata ($section, "streamablevideo", $streamable_url);
752    $doc_obj->associate_file($oflash_filename,$oflash_file,"video/flash",
753                 $section);
754    }
755
756    #
757    # FlowPlayer.swf       height+22 pixels
758    # FlowPlayerBlack.swf  height+16 pixels
759    # FlowPlayerThermo.swf height+16 pixels
760    # FlowPlayerWhite.swf  height+26 pixels
761    $doc_obj->add_metadata ($section, "flashwidth",    $video_width);
762    $doc_obj->add_metadata ($section, "flashheight",   $video_height + 22 + 100);
763   
764    my $base_url = "_httpstreamserverprefix_/collect/[collection]/index/assoc/{If}{[assocfilepath],[assocfilepath],[parent(Top):assocfilepath]}/";
765
766    $doc_obj->add_metadata ($section, "baseurl",$base_url);
767   
768    $self->{'oflash_file'} = $oflash_file;
769    $self->{'oflash_filename'} = $oflash_filename;
770
771}
772
773
774
775sub add_cuepoints
776{
777    my ($self) = shift @_;
778    my ($doc_obj) = @_;
779
780    my $section = $doc_obj->get_top_section();
781    my $chapters = $doc_obj->get_children($section);
782
783
784    # open file
785    my $output_dir = $self->{'videoconvert'}->{'cached_dir'};
786    my $cue_filename = &util::filename_cat($output_dir,"on_cue.xml");
787
788    open(CUEOUT,">$cue_filename")
789    || die "Unable to open $cue_filename: $!\n";
790    print CUEOUT "<tags>\n";
791
792
793    my $cc = 0;
794
795    foreach my $chap (@$chapters)
796    {
797    $cc++;
798
799    my $chap_text = $doc_obj->get_text($chap);
800
801    my @cuepoints
802        = ($chap_text =~ m/<p class=Timing><span\s+.*?>(?:T\d+:)? ?(\d\d:\d\d:\d\d)(?:\:\d\d)?/gsi);
803
804    my $count = 0;
805
806    foreach my $cuepoint (@cuepoints)
807    {       
808        my ($hh,$mm,$ss) = ($cuepoint =~ m/(\d\d):(\d\d):(\d\d)/);
809
810        my $cuept_insecs = $self->hms_to_secs($hh,$mm,$ss);
811
812        if ($cuept_insecs < 2) {
813        $cuept_insecs += 2;
814        }
815        my $cuept_inmsecs = 1000 * $cuept_insecs;
816       
817        $doc_obj->add_metadata($section,"cuepoint",$cuept_inmsecs);
818        my $chap_title = $doc_obj->get_metadata_element($chap,"Title");
819
820        # Navigation point (used in seeking)
821#       print CUEOUT "  <metatag event=\"onCuePoint\" overwrite=\"true\">\n";
822#       print CUEOUT "    <name>$chap_title</name>\n";
823#       print CUEOUT "    <timestamp>$cuept_inmsecs</timestamp>\n";
824#       print CUEOUT "    <parameters>\n";
825#       print CUEOUT "      <thumb>dummy</thumb>\n";
826#       print CUEOUT "      <sectionnum>$chap</sectionnum>\n";
827#       print CUEOUT "      <subsectionnum>$count</subsectionnum>\n";
828#       print CUEOUT "      <cuept>$cuept_inmsecs</cuept>\n";
829#       print CUEOUT "    </parameters>\n";
830#       print CUEOUT "    <type>navigation</type>\n";
831#       print CUEOUT "  </metatag>\n";
832
833
834#       print CUEOUT "  <metatag event=\"onCuePoint\" overwrite=\"true\">\n";
835#       print CUEOUT "    <name>$chap_title</name>\n";
836#       print CUEOUT "    <timestamp>$cuept_inmsecs</timestamp>\n";
837#       print CUEOUT "    <parameters>\n";
838#       print CUEOUT "      <thumb>foo.jpg</thumb>\n";
839#       print CUEOUT "    </parameters>\n";
840#       print CUEOUT "    <type>navigation</type>\n";
841#       print CUEOUT "  </metatag>\n";
842
843        if ($count==0)
844        {
845        # Event (used to hook in to javascipt callback)
846        # Only do for the first in each chapter
847
848        print CUEOUT "  <metatag event=\"onCuePoint\" overwrite=\"true\">\n";
849##      print CUEOUT "    <name>Test $cc</name>\n";
850        print CUEOUT "    <name>$chap_title</name>\n";
851        print CUEOUT "    <timestamp>$cuept_inmsecs</timestamp>\n";
852        print CUEOUT "    <parameters>\n";
853        print CUEOUT "      <cuept>$cuept_inmsecs</cuept>\n";
854        print CUEOUT "      <sectionnum>$chap</sectionnum>\n";
855        print CUEOUT "    </parameters>\n";
856        print CUEOUT "    <type>event</type>\n";
857##      print CUEOUT "    <type>actionscript</type>\n";
858        print CUEOUT "  </metatag>\n";
859        }
860
861        $count++;
862    }
863    }
864
865
866    print CUEOUT "</tags>\n";
867    close(CUEOUT);
868
869    my $videoconvert = $self->{'videoconvert'};
870    my $oflash_filename = $self->{'oflash_filename'};
871    my $oflash_file = $self->{'oflash_file'};
872
873    my ($streamcuepts_cmd,$ostreamcuepts_filename) = $videoconvert->streamcuepts_cmd($oflash_filename);
874
875    my $verbosity = $self->{'verbosity'};
876    my $outhandle = $self->{'outhandle'};
877
878    my $streamcuepts_options = { @{$videoconvert->{'flvtool2_monitor'}},
879                 'message_prefix' => "Stream Cue Points",
880                 'message' => "Reprocessing video stream to add cuepoints on timeline: $oflash_file" };
881
882    my $streamable_regenerated = $self->{'streamable_regenerated'};
883
884    if ($streamable_regenerated) {
885    $videoconvert->run_general_cmd($streamcuepts_cmd,$streamcuepts_options);
886    }
887
888   
889
890}
891
892
893
894sub process {
895    my $self = shift (@_);
896    my ($textref, $pluginfo, $base_dir, $file, $metadata, $doc_obj, $gli) = @_;
897
898    my $filename = $file;
899    $filename = &util::filename_cat ($base_dir, $file) if $base_dir =~ /\w/;
900
901    my $top_section = $doc_obj->get_top_section();
902
903    $self->streamable_video($base_dir,$filename,$doc_obj,$top_section);
904
905    $self->hyperlink_timing_info($textref);
906
907    foreach my $mp3_excerpt (@{$self->{'mp3_excerpts'}}) {
908    my $omp3_file = $mp3_excerpt->{'omp3_file'};
909    my $omp3_filename = $mp3_excerpt->{'omp3_filename'};
910
911    $doc_obj->associate_file($omp3_filename,$omp3_file,"audio/mp3",
912                 $top_section);
913    }
914    $self->{'mp3_excerpts'} = undef;
915
916    my $metatable_store = $self->{'metatable_store'};
917    foreach my $metaname (keys %$metatable_store) {
918    my $metadata = $metatable_store->{$metaname};
919    $doc_obj->add_metadata($top_section,$metaname,$metadata);
920    }
921    $self->{'metatable_store'} = undef;
922
923    my $ret_val = $self->SUPER::process(@_);
924
925    $self->add_cuepoints($doc_obj);
926
927
928    return $ret_val;
929
930}
931
932
933
934sub replace_images {
935    my $self = shift (@_);
936    my ($front, $link, $back, $base_dir,
937    $file, $doc_obj, $section) = @_;
938
939    if ($link =~ m/^"?_.*?_"?\//) {
940    # variety of greenstone macro, so let through unchanged
941    return $front . $link . $back ;
942    }
943
944    return $self->SUPER::replace_images(@_);
945}
946
947
948
949
950
951sub replace_href_links {
952    my $self = shift (@_);
953    my ($front, $link, $back, $base_dir, $file, $doc_obj, $section) = @_;
954
955
956    if ($link =~ m/^"?_.*?_"?/) {
957    # variety of greenstone macro, so let through unchanged
958    return $front . $link . $back ;
959    }
960
961    return $self->SUPER::replace_href_links(@_);
962}
963
9641;
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