2 Copyright (C) 2012 Carl Hetherington <cth@carlh.net>
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
28 #include <boost/filesystem.hpp>
29 #include <boost/algorithm/string.hpp>
30 #include <boost/lexical_cast.hpp>
31 #include <boost/date_time.hpp>
32 #include <libxml++/libxml++.h>
33 #include <libcxml/cxml.h>
38 #include "transcoder.h"
40 #include "job_manager.h"
41 #include "ab_transcode_job.h"
42 #include "transcode_job.h"
43 #include "scp_dcp_job.h"
45 #include "exceptions.h"
46 #include "examine_content_job.h"
50 #include "ui_signaller.h"
51 #include "video_decoder.h"
52 #include "audio_decoder.h"
53 #include "sndfile_decoder.h"
54 #include "analyse_audio_job.h"
56 #include "ffmpeg_content.h"
57 #include "imagemagick_content.h"
58 #include "sndfile_content.h"
63 using std::stringstream;
75 using boost::shared_ptr;
76 using boost::lexical_cast;
77 using boost::to_upper_copy;
78 using boost::ends_with;
79 using boost::starts_with;
80 using boost::optional;
83 int const Film::state_version = 4;
85 /** Construct a Film object in a given directory, reading any metadata
86 * file that exists in that directory. An exception will be thrown if
87 * must_exist is true and the specified directory does not exist.
89 * @param d Film directory.
90 * @param must_exist true to throw an exception if does not exist.
93 Film::Film (string d, bool must_exist)
94 : _playlist (new Playlist)
95 , _use_dci_name (true)
96 , _trust_content_headers (true)
97 , _dcp_content_type (0)
99 , _scaler (Scaler::from_id ("bicubic"))
105 , _with_subtitles (false)
106 , _subtitle_offset (0)
107 , _subtitle_scale (1)
109 , _j2k_bandwidth (200000000)
110 , _dci_metadata (Config::instance()->default_dci_metadata ())
111 , _dcp_frame_rate (0)
114 set_dci_date_today ();
116 /* Make state.directory a complete path without ..s (where possible)
117 (Code swiped from Adam Bowen on stackoverflow)
120 boost::filesystem::path p (boost::filesystem::system_complete (d));
121 boost::filesystem::path result;
122 for (boost::filesystem::path::iterator i = p.begin(); i != p.end(); ++i) {
124 if (boost::filesystem::is_symlink (result) || result.filename() == "..") {
127 result = result.parent_path ();
129 } else if (*i != ".") {
134 set_directory (result.string ());
136 if (!boost::filesystem::exists (directory())) {
138 throw OpenFileError (directory());
140 boost::filesystem::create_directory (directory());
148 _log.reset (new FileLog (file ("log")));
151 Film::Film (Film const & o)
152 : boost::enable_shared_from_this<Film> (o)
153 /* note: the copied film shares the original's log */
155 , _playlist (new Playlist)
156 , _directory (o._directory)
158 , _use_dci_name (o._use_dci_name)
159 , _trust_content_headers (o._trust_content_headers)
160 , _dcp_content_type (o._dcp_content_type)
161 , _format (o._format)
163 , _filters (o._filters)
164 , _scaler (o._scaler)
165 , _trim_start (o._trim_start)
166 , _trim_end (o._trim_end)
168 , _audio_gain (o._audio_gain)
169 , _audio_delay (o._audio_delay)
170 , _with_subtitles (o._with_subtitles)
171 , _subtitle_offset (o._subtitle_offset)
172 , _subtitle_scale (o._subtitle_scale)
173 , _colour_lut (o._colour_lut)
174 , _j2k_bandwidth (o._j2k_bandwidth)
175 , _dci_metadata (o._dci_metadata)
176 , _dci_date (o._dci_date)
177 , _dcp_frame_rate (o._dcp_frame_rate)
180 _playlist->setup (_content);
189 Film::video_state_identifier () const
197 pair<string, string> f = Filter::ffmpeg_strings (filters());
201 << "_" << content_digest()
202 << "_" << crop().left << "_" << crop().right << "_" << crop().top << "_" << crop().bottom
203 << "_" << _dcp_frame_rate
204 << "_" << f.first << "_" << f.second
205 << "_" << scaler()->id()
206 << "_" << j2k_bandwidth()
207 << "_" << boost::lexical_cast<int> (colour_lut());
210 pair<string, string> fa = Filter::ffmpeg_strings (Config::instance()->reference_filters());
211 s << "ab_" << Config::instance()->reference_scaler()->id() << "_" << fa.first << "_" << fa.second;
218 /** @return The path to the directory to write video frame info files to */
220 Film::info_dir () const
222 boost::filesystem::path p;
224 p /= video_state_identifier ();
225 return dir (p.string());
229 Film::video_mxf_dir () const
231 boost::filesystem::path p;
232 return dir ("video");
236 Film::video_mxf_filename () const
238 return video_state_identifier() + ".mxf";
242 Film::audio_analysis_path () const
244 boost::filesystem::path p;
246 p /= "XXX";//content_digest();
247 return file (p.string ());
250 /** Add suitable Jobs to the JobManager to create a DCP for this Film */
254 set_dci_date_today ();
256 if (dcp_name().find ("/") != string::npos) {
257 throw BadSettingError (_("name"), _("cannot contain slashes"));
260 log()->log (String::compose ("DVD-o-matic %1 git %2 using %3", dvdomatic_version, dvdomatic_git_commit, dependency_version_summary()));
264 gethostname (buffer, sizeof (buffer));
265 log()->log (String::compose ("Starting to make DCP on %1", buffer));
268 // log()->log (String::compose ("Content is %1; type %2", content_path(), (content_type() == STILL ? _("still") : _("video"))));
270 // log()->log (String::compose ("Content length %1", length().get()));
272 // log()->log (String::compose ("Content digest %1", content_digest()));
273 // log()->log (String::compose ("Content at %1 fps, DCP at %2 fps", source_frame_rate(), dcp_frame_rate()));
274 log()->log (String::compose ("%1 threads", Config::instance()->num_local_encoding_threads()));
275 log()->log (String::compose ("J2K bandwidth %1", j2k_bandwidth()));
276 #ifdef DVDOMATIC_DEBUG
277 log()->log ("DVD-o-matic built in debug mode.");
279 log()->log ("DVD-o-matic built in optimised mode.");
282 log()->log ("libdcp built in debug mode.");
284 log()->log ("libdcp built in optimised mode.");
286 pair<string, int> const c = cpu_info ();
287 log()->log (String::compose ("CPU: %1, %2 processors", c.first, c.second));
290 throw MissingSettingError (_("format"));
293 if (content().empty ()) {
294 throw MissingSettingError (_("content"));
297 if (dcp_content_type() == 0) {
298 throw MissingSettingError (_("content type"));
301 if (name().empty()) {
302 throw MissingSettingError (_("name"));
308 r = JobManager::instance()->add (shared_ptr<Job> (new ABTranscodeJob (shared_from_this())));
310 r = JobManager::instance()->add (shared_ptr<Job> (new TranscodeJob (shared_from_this())));
314 /** Start a job to analyse the audio of our content file */
316 Film::analyse_audio ()
318 if (_analyse_audio_job) {
322 _analyse_audio_job.reset (new AnalyseAudioJob (shared_from_this()));
323 _analyse_audio_job->Finished.connect (bind (&Film::analyse_audio_finished, this));
324 JobManager::instance()->add (_analyse_audio_job);
327 /** Start a job to examine a piece of content */
329 Film::examine_content (shared_ptr<Content> c)
331 shared_ptr<Job> j (new ExamineContentJob (shared_from_this(), c, trust_content_headers ()));
332 j->Finished.connect (bind (&Film::examine_content_finished, this));
333 JobManager::instance()->add (j);
337 Film::analyse_audio_finished ()
341 if (_analyse_audio_job->finished_ok ()) {
342 AudioAnalysisSucceeded ();
345 _analyse_audio_job.reset ();
349 Film::examine_content_finished ()
354 /** Start a job to send our DCP to the configured TMS */
356 Film::send_dcp_to_tms ()
358 shared_ptr<Job> j (new SCPDCPJob (shared_from_this()));
359 JobManager::instance()->add (j);
362 /** Count the number of frames that have been encoded for this film.
363 * @return frame count.
366 Film::encoded_frames () const
373 for (boost::filesystem::directory_iterator i = boost::filesystem::directory_iterator (info_dir ()); i != boost::filesystem::directory_iterator(); ++i) {
375 boost::this_thread::interruption_point ();
381 /** Write state to our `metadata' file */
383 Film::write_metadata () const
385 ContentList the_content = content ();
387 boost::mutex::scoped_lock lm (_state_mutex);
389 boost::filesystem::create_directories (directory());
392 xmlpp::Element* root = doc.create_root_node ("Metadata");
394 root->add_child("Version")->add_child_text (boost::lexical_cast<string> (state_version));
395 root->add_child("Name")->add_child_text (_name);
396 root->add_child("UseDCIName")->add_child_text (_use_dci_name ? "1" : "0");
397 root->add_child("TrustContentHeaders")->add_child_text (_trust_content_headers ? "1" : "0");
398 if (_dcp_content_type) {
399 root->add_child("DCPContentType")->add_child_text (_dcp_content_type->dci_name ());
402 root->add_child("Format")->add_child_text (_format->id ());
404 root->add_child("LeftCrop")->add_child_text (boost::lexical_cast<string> (_crop.left));
405 root->add_child("RightCrop")->add_child_text (boost::lexical_cast<string> (_crop.right));
406 root->add_child("TopCrop")->add_child_text (boost::lexical_cast<string> (_crop.top));
407 root->add_child("BottomCrop")->add_child_text (boost::lexical_cast<string> (_crop.bottom));
409 for (vector<Filter const *>::const_iterator i = _filters.begin(); i != _filters.end(); ++i) {
410 root->add_child("Filter")->add_child_text ((*i)->id ());
413 root->add_child("Scaler")->add_child_text (_scaler->id ());
414 root->add_child("TrimStart")->add_child_text (boost::lexical_cast<string> (_trim_start));
415 root->add_child("TrimEnd")->add_child_text (boost::lexical_cast<string> (_trim_end));
416 root->add_child("AB")->add_child_text (_ab ? "1" : "0");
417 root->add_child("AudioGain")->add_child_text (boost::lexical_cast<string> (_audio_gain));
418 root->add_child("AudioDelay")->add_child_text (boost::lexical_cast<string> (_audio_delay));
419 root->add_child("WithSubtitles")->add_child_text (_with_subtitles ? "1" : "0");
420 root->add_child("SubtitleOffset")->add_child_text (boost::lexical_cast<string> (_subtitle_offset));
421 root->add_child("SubtitleScale")->add_child_text (boost::lexical_cast<string> (_subtitle_scale));
422 root->add_child("ColourLUT")->add_child_text (boost::lexical_cast<string> (_colour_lut));
423 root->add_child("J2KBandwidth")->add_child_text (boost::lexical_cast<string> (_j2k_bandwidth));
424 _dci_metadata.as_xml (root->add_child ("DCIMetadata"));
425 root->add_child("DCIDate")->add_child_text (boost::gregorian::to_iso_string (_dci_date));
426 root->add_child("DCPFrameRate")->add_child_text (boost::lexical_cast<string> (_dcp_frame_rate));
428 for (ContentList::iterator i = the_content.begin(); i != the_content.end(); ++i) {
429 (*i)->as_xml (root->add_child ("Content"));
432 doc.write_to_file_formatted (file ("metadata.xml"));
437 /** Read state from our metadata file */
439 Film::read_metadata ()
441 boost::mutex::scoped_lock lm (_state_mutex);
443 if (boost::filesystem::exists (file ("metadata")) && !boost::filesystem::exists (file ("metadata.xml"))) {
444 throw StringError (_("This film was created with an older version of DVD-o-matic, and unfortunately it cannot be loaded into this version. You will need to create a new Film, re-add your content and set it up again. Sorry!"));
447 cxml::File f (file ("metadata.xml"), "Metadata");
449 _name = f.string_child ("Name");
450 _use_dci_name = f.bool_child ("UseDCIName");
451 _trust_content_headers = f.bool_child ("TrustContentHeaders");
454 optional<string> c = f.optional_string_child ("DCPContentType");
456 _dcp_content_type = DCPContentType::from_dci_name (c.get ());
461 optional<string> c = f.optional_string_child ("Format");
463 _format = Format::from_id (c.get ());
467 _crop.left = f.number_child<int> ("LeftCrop");
468 _crop.right = f.number_child<int> ("RightCrop");
469 _crop.top = f.number_child<int> ("TopCrop");
470 _crop.bottom = f.number_child<int> ("BottomCrop");
473 list<shared_ptr<cxml::Node> > c = f.node_children ("Filter");
474 for (list<shared_ptr<cxml::Node> >::iterator i = c.begin(); i != c.end(); ++i) {
475 _filters.push_back (Filter::from_id ((*i)->content ()));
479 _scaler = Scaler::from_id (f.string_child ("Scaler"));
480 _trim_start = f.number_child<int> ("TrimStart");
481 _trim_end = f.number_child<int> ("TrimEnd");
482 _ab = f.bool_child ("AB");
483 _audio_gain = f.number_child<float> ("AudioGain");
484 _audio_delay = f.number_child<int> ("AudioDelay");
485 _with_subtitles = f.bool_child ("WithSubtitles");
486 _subtitle_offset = f.number_child<float> ("SubtitleOffset");
487 _subtitle_scale = f.number_child<float> ("SubtitleScale");
488 _colour_lut = f.number_child<int> ("ColourLUT");
489 _j2k_bandwidth = f.number_child<int> ("J2KBandwidth");
490 _dci_metadata = DCIMetadata (f.node_child ("DCIMetadata"));
491 _dci_date = boost::gregorian::from_undelimited_string (f.string_child ("DCIDate"));
492 _dcp_frame_rate = f.number_child<int> ("DCPFrameRate");
494 list<shared_ptr<cxml::Node> > c = f.node_children ("Content");
495 for (list<shared_ptr<cxml::Node> >::iterator i = c.begin(); i != c.end(); ++i) {
497 string const type = (*i)->string_child ("Type");
499 if (type == "FFmpeg") {
500 _content.push_back (shared_ptr<Content> (new FFmpegContent (*i)));
501 } else if (type == "ImageMagick") {
502 _content.push_back (shared_ptr<Content> (new ImageMagickContent (*i)));
503 } else if (type == "Sndfile") {
504 _content.push_back (shared_ptr<Content> (new SndfileContent (*i)));
512 Film::cropped_size (libdcp::Size s) const
514 boost::mutex::scoped_lock lm (_state_mutex);
515 s.width -= _crop.left + _crop.right;
516 s.height -= _crop.top + _crop.bottom;
520 /** Given a directory name, return its full path within the Film's directory.
521 * The directory (and its parents) will be created if they do not exist.
524 Film::dir (string d) const
526 boost::mutex::scoped_lock lm (_directory_mutex);
528 boost::filesystem::path p;
532 boost::filesystem::create_directories (p);
537 /** Given a file or directory name, return its full path within the Film's directory.
538 * _directory_mutex must not be locked on entry.
539 * Any required parent directories will be created.
542 Film::file (string f) const
544 boost::mutex::scoped_lock lm (_directory_mutex);
546 boost::filesystem::path p;
550 boost::filesystem::create_directories (p.parent_path ());
555 /** @return The sampling rate that we will resample the audio to */
557 Film::target_audio_sample_rate () const
563 /* Resample to a DCI-approved sample rate */
564 double t = dcp_audio_sample_rate (audio_frame_rate());
566 FrameRateConversion frc (video_frame_rate(), dcp_frame_rate());
568 /* Compensate if the DCP is being run at a different frame rate
569 to the source; that is, if the video is run such that it will
570 look different in the DCP compared to the source (slower or faster).
571 skip/repeat doesn't come into effect here.
574 if (frc.change_speed) {
575 t *= video_frame_rate() * frc.factor() / dcp_frame_rate();
581 /** @return a DCI-compliant name for a DCP of this film */
583 Film::dci_name (bool if_created_now) const
587 string fixed_name = to_upper_copy (name());
588 for (size_t i = 0; i < fixed_name.length(); ++i) {
589 if (fixed_name[i] == ' ') {
594 /* Spec is that the name part should be maximum 14 characters, as I understand it */
595 if (fixed_name.length() > 14) {
596 fixed_name = fixed_name.substr (0, 14);
601 if (dcp_content_type()) {
602 d << "_" << dcp_content_type()->dci_name();
606 d << "_" << format()->dci_name();
609 DCIMetadata const dm = dci_metadata ();
611 if (!dm.audio_language.empty ()) {
612 d << "_" << dm.audio_language;
613 if (!dm.subtitle_language.empty()) {
614 d << "-" << dm.subtitle_language;
620 if (!dm.territory.empty ()) {
621 d << "_" << dm.territory;
622 if (!dm.rating.empty ()) {
623 d << "-" << dm.rating;
645 if (!dm.studio.empty ()) {
646 d << "_" << dm.studio;
649 if (if_created_now) {
650 d << "_" << boost::gregorian::to_iso_string (boost::gregorian::day_clock::local_day ());
652 d << "_" << boost::gregorian::to_iso_string (_dci_date);
655 if (!dm.facility.empty ()) {
656 d << "_" << dm.facility;
659 if (!dm.package_type.empty ()) {
660 d << "_" << dm.package_type;
666 /** @return name to give the DCP */
668 Film::dcp_name (bool if_created_now) const
670 if (use_dci_name()) {
671 return dci_name (if_created_now);
679 Film::set_directory (string d)
681 boost::mutex::scoped_lock lm (_state_mutex);
687 Film::set_name (string n)
690 boost::mutex::scoped_lock lm (_state_mutex);
693 signal_changed (NAME);
697 Film::set_use_dci_name (bool u)
700 boost::mutex::scoped_lock lm (_state_mutex);
703 signal_changed (USE_DCI_NAME);
707 Film::set_trust_content_headers (bool t)
710 boost::mutex::scoped_lock lm (_state_mutex);
711 _trust_content_headers = t;
714 signal_changed (TRUST_CONTENT_HEADERS);
716 if (!_trust_content_headers && !content().empty()) {
717 /* We just said that we don't trust the content's header */
719 // examine_content ();
724 Film::set_dcp_content_type (DCPContentType const * t)
727 boost::mutex::scoped_lock lm (_state_mutex);
728 _dcp_content_type = t;
730 signal_changed (DCP_CONTENT_TYPE);
734 Film::set_format (Format const * f)
737 boost::mutex::scoped_lock lm (_state_mutex);
740 signal_changed (FORMAT);
744 Film::set_crop (Crop c)
747 boost::mutex::scoped_lock lm (_state_mutex);
750 signal_changed (CROP);
754 Film::set_left_crop (int c)
757 boost::mutex::scoped_lock lm (_state_mutex);
759 if (_crop.left == c) {
765 signal_changed (CROP);
769 Film::set_right_crop (int c)
772 boost::mutex::scoped_lock lm (_state_mutex);
773 if (_crop.right == c) {
779 signal_changed (CROP);
783 Film::set_top_crop (int c)
786 boost::mutex::scoped_lock lm (_state_mutex);
787 if (_crop.top == c) {
793 signal_changed (CROP);
797 Film::set_bottom_crop (int c)
800 boost::mutex::scoped_lock lm (_state_mutex);
801 if (_crop.bottom == c) {
807 signal_changed (CROP);
811 Film::set_filters (vector<Filter const *> f)
814 boost::mutex::scoped_lock lm (_state_mutex);
817 signal_changed (FILTERS);
821 Film::set_scaler (Scaler const * s)
824 boost::mutex::scoped_lock lm (_state_mutex);
827 signal_changed (SCALER);
831 Film::set_trim_start (int t)
834 boost::mutex::scoped_lock lm (_state_mutex);
837 signal_changed (TRIM_START);
841 Film::set_trim_end (int t)
844 boost::mutex::scoped_lock lm (_state_mutex);
847 signal_changed (TRIM_END);
851 Film::set_ab (bool a)
854 boost::mutex::scoped_lock lm (_state_mutex);
861 Film::set_audio_gain (float g)
864 boost::mutex::scoped_lock lm (_state_mutex);
867 signal_changed (AUDIO_GAIN);
871 Film::set_audio_delay (int d)
874 boost::mutex::scoped_lock lm (_state_mutex);
877 signal_changed (AUDIO_DELAY);
881 Film::set_with_subtitles (bool w)
884 boost::mutex::scoped_lock lm (_state_mutex);
887 signal_changed (WITH_SUBTITLES);
891 Film::set_subtitle_offset (int o)
894 boost::mutex::scoped_lock lm (_state_mutex);
895 _subtitle_offset = o;
897 signal_changed (SUBTITLE_OFFSET);
901 Film::set_subtitle_scale (float s)
904 boost::mutex::scoped_lock lm (_state_mutex);
907 signal_changed (SUBTITLE_SCALE);
911 Film::set_colour_lut (int i)
914 boost::mutex::scoped_lock lm (_state_mutex);
917 signal_changed (COLOUR_LUT);
921 Film::set_j2k_bandwidth (int b)
924 boost::mutex::scoped_lock lm (_state_mutex);
927 signal_changed (J2K_BANDWIDTH);
931 Film::set_dci_metadata (DCIMetadata m)
934 boost::mutex::scoped_lock lm (_state_mutex);
937 signal_changed (DCI_METADATA);
942 Film::set_dcp_frame_rate (int f)
945 boost::mutex::scoped_lock lm (_state_mutex);
948 signal_changed (DCP_FRAME_RATE);
952 Film::signal_changed (Property p)
955 boost::mutex::scoped_lock lm (_state_mutex);
960 ui_signaller->emit (boost::bind (boost::ref (Changed), p));
965 Film::set_dci_date_today ()
967 _dci_date = boost::gregorian::day_clock::local_day ();
971 Film::info_path (int f) const
973 boost::filesystem::path p;
978 s << setfill('0') << f << ".md5";
982 /* info_dir() will already have added any initial bit of the path,
983 so don't call file() on this.
989 Film::j2c_path (int f, bool t) const
991 boost::filesystem::path p;
993 p /= video_state_identifier ();
997 s << setfill('0') << f << ".j2c";
1004 return file (p.string ());
1007 /** Make an educated guess as to whether we have a complete DCP
1009 * @return true if we do.
1013 Film::have_dcp () const
1016 libdcp::DCP dcp (dir (dcp_name()));
1026 Film::player () const
1028 boost::mutex::scoped_lock lm (_state_mutex);
1029 return shared_ptr<Player> (new Player (shared_from_this (), _playlist));
1033 Film::add_content (shared_ptr<Content> c)
1036 boost::mutex::scoped_lock lm (_state_mutex);
1037 _content.push_back (c);
1038 _playlist->setup (_content);
1041 signal_changed (CONTENT);
1043 examine_content (c);
1047 Film::remove_content (shared_ptr<Content> c)
1050 boost::mutex::scoped_lock lm (_state_mutex);
1051 ContentList::iterator i = find (_content.begin(), _content.end(), c);
1052 if (i != _content.end ()) {
1057 signal_changed (CONTENT);
1061 Film::move_content_earlier (shared_ptr<Content> c)
1064 boost::mutex::scoped_lock lm (_state_mutex);
1065 ContentList::iterator i = find (_content.begin(), _content.end(), c);
1066 if (i == _content.begin () || i == _content.end()) {
1070 ContentList::iterator j = i;
1076 signal_changed (CONTENT);
1080 Film::move_content_later (shared_ptr<Content> c)
1083 boost::mutex::scoped_lock lm (_state_mutex);
1084 ContentList::iterator i = find (_content.begin(), _content.end(), c);
1085 if (i == _content.end()) {
1089 ContentList::iterator j = i;
1091 if (j == _content.end ()) {
1098 signal_changed (CONTENT);
1103 Film::audio_length () const
1105 return _playlist->audio_length ();
1109 Film::audio_channels () const
1111 return _playlist->audio_channels ();
1115 Film::audio_frame_rate () const
1117 return _playlist->audio_frame_rate ();
1121 Film::audio_channel_layout () const
1123 return _playlist->audio_channel_layout ();
1127 Film::has_audio () const
1129 return _playlist->has_audio ();
1133 Film::video_frame_rate () const
1135 return _playlist->video_frame_rate ();
1139 Film::video_size () const
1141 return _playlist->video_size ();
1145 Film::video_length () const
1147 return _playlist->video_length ();