src/lib/ffmpeg_content.cc

   1 /*
   2     Copyright (C) 2013-2021 Carl Hetherington <cth@carlh.net>
   3
   4     This file is part of DCP-o-matic.
   5
   6     DCP-o-matic is free software; you can redistribute it and/or modify
   7     it under the terms of the GNU General Public License as published by
   8     the Free Software Foundation; either version 2 of the License, or
   9     (at your option) any later version.
  10
  11     DCP-o-matic is distributed in the hope that it will be useful,
  12     but WITHOUT ANY WARRANTY; without even the implied warranty of
  13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14     GNU General Public License for more details.
  15
  16     You should have received a copy of the GNU General Public License
  17     along with DCP-o-matic.  If not, see <http://www.gnu.org/licenses/>.
  18
  19
  20 */
  21
  22 #include "audio_content.h"
  23 #include "compose.hpp"
  24 #include "config.h"
  25 #include "constants.h"
  26 #include "exceptions.h"
  27 #include "ffmpeg_audio_stream.h"
  28 #include "ffmpeg_content.h"
  29 #include "ffmpeg_examiner.h"
  30 #include "ffmpeg_subtitle_stream.h"
  31 #include "film.h"
  32 #include "filter.h"
  33 #include "frame_rate_change.h"
  34 #include "job.h"
  35 #include "log.h"
  36 #include "text_content.h"
  37 #include "video_content.h"
  38 #include <dcp/raw_convert.h>
  39 #include <libcxml/cxml.h>
  40 extern "C" {
  41 #include <libavformat/avformat.h>
  42 #include <libavutil/pixdesc.h>
  43 }
  44 #include <libxml++/libxml++.h>
  45 #include <iostream>
  46
  47 #include "i18n.h"
  48
  49
  50 using std::string;
  51 using std::vector;
  52 using std::list;
  53 using std::cout;
  54 using std::pair;
  55 using std::make_pair;
  56 using std::max;
  57 using std::make_shared;
  58 using std::shared_ptr;
  59 using std::dynamic_pointer_cast;
  60 using boost::optional;
  61 using dcp::raw_convert;
  62 using namespace dcpomatic;
  63
  64
  65 int const FFmpegContentProperty::SUBTITLE_STREAMS = 100;
  66 int const FFmpegContentProperty::SUBTITLE_STREAM = 101;
  67 int const FFmpegContentProperty::FILTERS = 102;
  68 int const FFmpegContentProperty::KDM = 103;
  69
  70
  71 FFmpegContent::FFmpegContent (boost::filesystem::path p)
  72         : Content (p)
  73 {
  74
  75 }
  76
  77
  78 template <class T>
  79 optional<T>
  80 get_optional_enum (cxml::ConstNodePtr node, string name)
  81 {
  82         auto const v = node->optional_number_child<int>(name);
  83         if (!v) {
  84                 return optional<T>();
  85         }
  86         return static_cast<T>(*v);
  87 }
  88
  89
  90 FFmpegContent::FFmpegContent (cxml::ConstNodePtr node, int version, list<string>& notes)
  91         : Content (node)
  92 {
  93         _color_range = get_optional_enum<AVColorRange>(node, "ColorRange");
  94
  95         VideoRange const video_range_hint = (_color_range && *_color_range == AVCOL_RANGE_JPEG) ? VideoRange::FULL : VideoRange::VIDEO;
  96
  97         video = VideoContent::from_xml (this, node, version, video_range_hint);
  98         audio = AudioContent::from_xml (this, node, version);
  99         text = TextContent::from_xml (this, node, version, notes);
 100
 101         for (auto i: node->node_children("SubtitleStream")) {
 102                 _subtitle_streams.push_back (make_shared<FFmpegSubtitleStream>(i, version));
 103                 if (i->optional_number_child<int>("Selected")) {
 104                         _subtitle_stream = _subtitle_streams.back ();
 105                 }
 106         }
 107
 108         for (auto i: node->node_children("AudioStream")) {
 109                 auto as = make_shared<FFmpegAudioStream>(i, version);
 110                 audio->add_stream (as);
 111                 if (version < 11 && !i->optional_node_child ("Selected")) {
 112                         /* This is an old file and this stream is not selected, so un-map it */
 113                         as->set_mapping (AudioMapping (as->channels (), MAX_DCP_AUDIO_CHANNELS));
 114                 }
 115         }
 116
 117         for (auto i: node->node_children("Filter")) {
 118                 if (auto filter = Filter::from_id(i->content())) {
 119                         _filters.push_back(*filter);
 120                 } else {
 121                         notes.push_back (String::compose (_("DCP-o-matic no longer supports the `%1' filter, so it has been turned off."), i->content()));
 122                 }
 123         }
 124
 125         auto const f = node->optional_number_child<ContentTime::Type> ("FirstVideo");
 126         if (f) {
 127                 _first_video = ContentTime (f.get ());
 128         }
 129
 130         _color_primaries = get_optional_enum<AVColorPrimaries>(node, "ColorPrimaries");
 131         _color_trc = get_optional_enum<AVColorTransferCharacteristic>(node, "ColorTransferCharacteristic");
 132         _colorspace = get_optional_enum<AVColorSpace>(node, "Colorspace");
 133         _bits_per_pixel = node->optional_number_child<int> ("BitsPerPixel");
 134 }
 135
 136
 137 FFmpegContent::FFmpegContent (vector<shared_ptr<Content>> c)
 138         : Content (c)
 139 {
 140         auto i = c.begin ();
 141
 142         bool need_video = false;
 143         bool need_audio = false;
 144         bool need_text = false;
 145
 146         if (i != c.end ()) {
 147                 need_video = static_cast<bool> ((*i)->video);
 148                 need_audio = static_cast<bool> ((*i)->audio);
 149                 need_text = !(*i)->text.empty();
 150         }
 151
 152         while (i != c.end ()) {
 153                 if (need_video != static_cast<bool> ((*i)->video)) {
 154                         throw JoinError (_("Content to be joined must all have or not have video"));
 155                 }
 156                 if (need_audio != static_cast<bool> ((*i)->audio)) {
 157                         throw JoinError (_("Content to be joined must all have or not have audio"));
 158                 }
 159                 if (need_text != !(*i)->text.empty()) {
 160                         throw JoinError (_("Content to be joined must all have or not have subtitles or captions"));
 161                 }
 162                 ++i;
 163         }
 164
 165         if (need_video) {
 166                 video = make_shared<VideoContent>(this, c);
 167         }
 168         if (need_audio) {
 169                 audio = make_shared<AudioContent>(this, c);
 170         }
 171         if (need_text) {
 172                 text.push_back (make_shared<TextContent>(this, c));
 173         }
 174
 175         auto ref = dynamic_pointer_cast<FFmpegContent> (c[0]);
 176         DCPOMATIC_ASSERT (ref);
 177
 178         for (size_t i = 0; i < c.size(); ++i) {
 179                 auto fc = dynamic_pointer_cast<FFmpegContent>(c[i]);
 180                 if (fc->only_text() && fc->only_text()->use() && *(fc->_subtitle_stream.get()) != *(ref->_subtitle_stream.get())) {
 181                         throw JoinError (_("Content to be joined must use the same subtitle stream."));
 182                 }
 183         }
 184
 185         /* XXX: should probably check that more of the stuff below is the same in *this and ref */
 186
 187         _subtitle_streams = ref->subtitle_streams ();
 188         _subtitle_stream = ref->subtitle_stream ();
 189         _first_video = ref->_first_video;
 190         _filters = ref->_filters;
 191         _color_range = ref->_color_range;
 192         _color_primaries = ref->_color_primaries;
 193         _color_trc = ref->_color_trc;
 194         _colorspace = ref->_colorspace;
 195         _bits_per_pixel = ref->_bits_per_pixel;
 196 }
 197
 198
 199 void
 200 FFmpegContent::as_xml (xmlpp::Node* node, bool with_paths) const
 201 {
 202         node->add_child("Type")->add_child_text("FFmpeg");
 203         Content::as_xml (node, with_paths);
 204
 205         if (video) {
 206                 video->as_xml (node);
 207         }
 208
 209         if (audio) {
 210                 audio->as_xml (node);
 211
 212                 for (auto i: audio->streams()) {
 213                         auto f = dynamic_pointer_cast<FFmpegAudioStream> (i);
 214                         DCPOMATIC_ASSERT (f);
 215                         f->as_xml (node->add_child("AudioStream"));
 216                 }
 217         }
 218
 219         if (only_text()) {
 220                 only_text()->as_xml (node);
 221         }
 222
 223         boost::mutex::scoped_lock lm (_mutex);
 224
 225         for (auto i: _subtitle_streams) {
 226                 auto t = node->add_child("SubtitleStream");
 227                 if (_subtitle_stream && i == _subtitle_stream) {
 228                         t->add_child("Selected")->add_child_text("1");
 229                 }
 230                 i->as_xml (t);
 231         }
 232
 233         for (auto i: _filters) {
 234                 node->add_child("Filter")->add_child_text(i.id());
 235         }
 236
 237         if (_first_video) {
 238                 node->add_child("FirstVideo")->add_child_text(raw_convert<string>(_first_video.get().get()));
 239         }
 240
 241         if (_color_range) {
 242                 node->add_child("ColorRange")->add_child_text(raw_convert<string>(static_cast<int>(*_color_range)));
 243         }
 244         if (_color_primaries) {
 245                 node->add_child("ColorPrimaries")->add_child_text(raw_convert<string>(static_cast<int>(*_color_primaries)));
 246         }
 247         if (_color_trc) {
 248                 node->add_child("ColorTransferCharacteristic")->add_child_text(raw_convert<string>(static_cast<int>(*_color_trc)));
 249         }
 250         if (_colorspace) {
 251                 node->add_child("Colorspace")->add_child_text(raw_convert<string>(static_cast<int>(*_colorspace)));
 252         }
 253         if (_bits_per_pixel) {
 254                 node->add_child("BitsPerPixel")->add_child_text(raw_convert<string>(*_bits_per_pixel));
 255         }
 256 }
 257
 258
 259 void
 260 FFmpegContent::examine (shared_ptr<const Film> film, shared_ptr<Job> job)
 261 {
 262         ContentChangeSignaller cc1 (this, FFmpegContentProperty::SUBTITLE_STREAMS);
 263         ContentChangeSignaller cc2 (this, FFmpegContentProperty::SUBTITLE_STREAM);
 264
 265         if (job) {
 266                 job->set_progress_unknown ();
 267         }
 268
 269         Content::examine (film, job);
 270
 271         auto examiner = make_shared<FFmpegExaminer>(shared_from_this (), job);
 272
 273         if (examiner->has_video ()) {
 274                 video.reset (new VideoContent (this));
 275                 video->take_from_examiner(film, examiner);
 276         }
 277
 278         auto first_path = path (0);
 279
 280         {
 281                 boost::mutex::scoped_lock lm (_mutex);
 282
 283                 if (examiner->has_video ()) {
 284                         _first_video = examiner->first_video ();
 285                         _color_range = examiner->color_range ();
 286                         _color_primaries = examiner->color_primaries ();
 287                         _color_trc = examiner->color_trc ();
 288                         _colorspace = examiner->colorspace ();
 289                         _bits_per_pixel = examiner->bits_per_pixel ();
 290
 291                         if (examiner->rotation()) {
 292                                 auto rot = *examiner->rotation ();
 293                                 if (fabs (rot - 180) < 1.0) {
 294                                         _filters.push_back(*Filter::from_id("vflip"));
 295                                         _filters.push_back(*Filter::from_id("hflip"));
 296                                 } else if (fabs (rot - 90) < 1.0) {
 297                                         _filters.push_back(*Filter::from_id("90clock"));
 298                                         video->rotate_size();
 299                                 } else if (fabs (rot - 270) < 1.0) {
 300                                         _filters.push_back(*Filter::from_id("90anticlock"));
 301                                         video->rotate_size();
 302                                 }
 303                         }
 304                         if (examiner->has_alpha()) {
 305                                 _filters.push_back(*Filter::from_id("premultiply"));
 306                         }
 307                 }
 308
 309                 if (!examiner->audio_streams().empty()) {
 310                         audio = make_shared<AudioContent>(this);
 311
 312                         for (auto i: examiner->audio_streams()) {
 313                                 audio->add_stream (i);
 314                         }
 315
 316                         auto as = audio->streams().front();
 317                         auto m = as->mapping ();
 318                         m.make_default (film ? film->audio_processor() : 0, first_path);
 319                         as->set_mapping (m);
 320                 }
 321
 322                 _subtitle_streams = examiner->subtitle_streams ();
 323                 if (!_subtitle_streams.empty ()) {
 324                         text.clear ();
 325                         text.push_back (make_shared<TextContent>(this, TextType::OPEN_SUBTITLE, TextType::UNKNOWN));
 326                         _subtitle_stream = _subtitle_streams.front ();
 327                         text.front()->add_font(make_shared<dcpomatic::Font>(""));
 328                 }
 329         }
 330
 331         if (examiner->has_video ()) {
 332                 set_default_colour_conversion ();
 333         }
 334
 335         if (examiner->has_video() && examiner->pulldown() && video_frame_rate() && fabs(*video_frame_rate() - 29.97) < 0.001) {
 336                 /* FFmpeg has detected this file as 29.97 and the examiner thinks it is using "soft" 2:3 pulldown (telecine).
 337                  * This means we can treat it as a 23.976fps file.
 338                  */
 339                 set_video_frame_rate(film, 24000.0 / 1001);
 340                 video->set_length (video->length() * 24.0 / 30);
 341         }
 342 }
 343
 344
 345 string
 346 FFmpegContent::summary () const
 347 {
 348         if (video && audio) {
 349                 return String::compose (_("%1 [movie]"), path_summary());
 350         } else if (video) {
 351                 return String::compose (_("%1 [video]"), path_summary());
 352         } else if (audio) {
 353                 return String::compose (_("%1 [audio]"), path_summary());
 354         }
 355
 356         return path_summary ();
 357 }
 358
 359
 360 string
 361 FFmpegContent::technical_summary () const
 362 {
 363         string as = "";
 364         for (auto i: ffmpeg_audio_streams ()) {
 365                 as += i->technical_summary () + " " ;
 366         }
 367
 368         if (as.empty ()) {
 369                 as = "none";
 370         }
 371
 372         string ss = "none";
 373         if (_subtitle_stream) {
 374                 ss = _subtitle_stream->technical_summary ();
 375         }
 376
 377         auto filt = Filter::ffmpeg_string (_filters);
 378
 379         auto s = Content::technical_summary ();
 380
 381         if (video) {
 382                 s += " - " + video->technical_summary ();
 383         }
 384
 385         if (audio) {
 386                 s += " - " + audio->technical_summary ();
 387         }
 388
 389         return s + String::compose (
 390                 "ffmpeg: audio %1 subtitle %2 filters %3", as, ss, filt
 391                 );
 392 }
 393
 394
 395 void
 396 FFmpegContent::set_subtitle_stream (shared_ptr<FFmpegSubtitleStream> s)
 397 {
 398         ContentChangeSignaller cc (this, FFmpegContentProperty::SUBTITLE_STREAM);
 399
 400         {
 401                 boost::mutex::scoped_lock lm (_mutex);
 402                 _subtitle_stream = s;
 403         }
 404 }
 405
 406
 407 bool
 408 operator== (FFmpegStream const & a, FFmpegStream const & b)
 409 {
 410         return a._id == b._id;
 411 }
 412
 413
 414 bool
 415 operator!= (FFmpegStream const & a, FFmpegStream const & b)
 416 {
 417         return a._id != b._id;
 418 }
 419
 420
 421 DCPTime
 422 FFmpegContent::full_length (shared_ptr<const Film> film) const
 423 {
 424         FrameRateChange const frc (film, shared_from_this());
 425         if (video) {
 426                 return DCPTime::from_frames (llrint (video->length_after_3d_combine() * frc.factor()), film->video_frame_rate());
 427         }
 428
 429         if (audio) {
 430                 DCPTime longest;
 431                 for (auto i: audio->streams()) {
 432                         longest = max (longest, DCPTime::from_frames(llrint(i->length() / frc.speed_up), i->frame_rate()));
 433                 }
 434                 return longest;
 435         }
 436
 437         /* XXX: subtitle content? */
 438
 439         return {};
 440 }
 441
 442
 443 DCPTime
 444 FFmpegContent::approximate_length () const
 445 {
 446         if (video) {
 447                 return DCPTime::from_frames (video->length_after_3d_combine(), 24);
 448         }
 449
 450         DCPOMATIC_ASSERT (audio);
 451
 452         Frame longest = 0;
 453         for (auto i: audio->streams()) {
 454                 longest = max (longest, Frame(llrint(i->length())));
 455         }
 456
 457         return DCPTime::from_frames (longest, 24);
 458 }
 459
 460
 461 void
 462 FFmpegContent::set_filters(vector<Filter> const& filters)
 463 {
 464         ContentChangeSignaller cc (this, FFmpegContentProperty::FILTERS);
 465
 466         {
 467                 boost::mutex::scoped_lock lm (_mutex);
 468                 _filters = filters;
 469         }
 470 }
 471
 472
 473 string
 474 FFmpegContent::identifier () const
 475 {
 476         string s = Content::identifier();
 477
 478         if (video) {
 479                 s += "_" + video->identifier();
 480         }
 481
 482         if (only_text() && only_text()->use() && only_text()->burn()) {
 483                 s += "_" + only_text()->identifier();
 484         }
 485
 486         boost::mutex::scoped_lock lm (_mutex);
 487
 488         if (_subtitle_stream) {
 489                 s += "_" + _subtitle_stream->identifier ();
 490         }
 491
 492         for (auto i: _filters) {
 493                 s += "_" + i.id();
 494         }
 495
 496         return s;
 497 }
 498
 499
 500 void
 501 FFmpegContent::set_default_colour_conversion ()
 502 {
 503         DCPOMATIC_ASSERT (video);
 504
 505         auto const s = video->size ();
 506
 507         boost::mutex::scoped_lock lm (_mutex);
 508
 509         switch (_colorspace.get_value_or(AVCOL_SPC_UNSPECIFIED)) {
 510         case AVCOL_SPC_RGB:
 511                 video->set_colour_conversion (PresetColourConversion::from_id ("srgb").conversion);
 512                 break;
 513         case AVCOL_SPC_BT709:
 514                 video->set_colour_conversion (PresetColourConversion::from_id ("rec709").conversion);
 515                 break;
 516         case AVCOL_SPC_BT470BG:
 517         case AVCOL_SPC_SMPTE170M:
 518         case AVCOL_SPC_SMPTE240M:
 519                 video->set_colour_conversion (PresetColourConversion::from_id ("rec601").conversion);
 520                 break;
 521         case AVCOL_SPC_BT2020_CL:
 522         case AVCOL_SPC_BT2020_NCL:
 523                 video->set_colour_conversion (PresetColourConversion::from_id ("rec2020").conversion);
 524                 break;
 525         default:
 526                 if (s && s->width < 1080) {
 527                         video->set_colour_conversion (PresetColourConversion::from_id ("rec601").conversion);
 528                 } else {
 529                         video->set_colour_conversion (PresetColourConversion::from_id ("rec709").conversion);
 530                 }
 531                 break;
 532         }
 533 }
 534
 535
 536 void
 537 FFmpegContent::add_properties (shared_ptr<const Film> film, list<UserProperty>& p) const
 538 {
 539         Content::add_properties (film, p);
 540
 541         if (video) {
 542                 video->add_properties (p);
 543
 544                 if (_bits_per_pixel) {
 545                         auto pixel_quanta_product = video->pixel_quanta().x * video->pixel_quanta().y;
 546                         auto bits_per_main_pixel = pixel_quanta_product * _bits_per_pixel.get() / (pixel_quanta_product + 2);
 547
 548                         int const lim_start = pow(2, bits_per_main_pixel - 4);
 549                         int const lim_end = 235 * pow(2, bits_per_main_pixel - 8);
 550                         int const total = pow(2, bits_per_main_pixel);
 551
 552                         switch (_color_range.get_value_or(AVCOL_RANGE_UNSPECIFIED)) {
 553                         case AVCOL_RANGE_UNSPECIFIED:
 554                                 /// TRANSLATORS: this means that the range of pixel values used in this
 555                                 /// file is unknown (not specified in the file).
 556                                 p.push_back (UserProperty (UserProperty::VIDEO, _("Colour range"), _("Unspecified")));
 557                                 break;
 558                         case AVCOL_RANGE_MPEG:
 559                                 /// TRANSLATORS: this means that the range of pixel values used in this
 560                                 /// file is limited, so that not all possible values are valid.
 561                                 p.push_back (
 562                                         UserProperty (
 563                                                 UserProperty::VIDEO, _("Colour range"), String::compose(_("Limited / video (%1-%2)"), lim_start, lim_end)
 564                                                 )
 565                                         );
 566                                 break;
 567                         case AVCOL_RANGE_JPEG:
 568                                 /// TRANSLATORS: this means that the range of pixel values used in this
 569                                 /// file is full, so that all possible pixel values are valid.
 570                                 p.push_back(UserProperty(UserProperty::VIDEO, _("Colour range"), String::compose(_("Full (0-%1)"), total - 1)));
 571                                 break;
 572                         default:
 573                                 DCPOMATIC_ASSERT (false);
 574                         }
 575                 } else {
 576                         switch (_color_range.get_value_or(AVCOL_RANGE_UNSPECIFIED)) {
 577                         case AVCOL_RANGE_UNSPECIFIED:
 578                                 /// TRANSLATORS: this means that the range of pixel values used in this
 579                                 /// file is unknown (not specified in the file).
 580                                 p.push_back (UserProperty (UserProperty::VIDEO, _("Colour range"), _("Unspecified")));
 581                                 break;
 582                         case AVCOL_RANGE_MPEG:
 583                                 /// TRANSLATORS: this means that the range of pixel values used in this
 584                                 /// file is limited, so that not all possible values are valid.
 585                                 p.push_back (UserProperty (UserProperty::VIDEO, _("Colour range"), _("Limited")));
 586                                 break;
 587                         case AVCOL_RANGE_JPEG:
 588                                 /// TRANSLATORS: this means that the range of pixel values used in this
 589                                 /// file is full, so that all possible pixel values are valid.
 590                                 p.push_back (UserProperty (UserProperty::VIDEO, _("Colour range"), _("Full")));
 591                                 break;
 592                         default:
 593                                 DCPOMATIC_ASSERT (false);
 594                         }
 595                 }
 596
 597                 char const * primaries[] = {
 598                         _("Unspecified"),
 599                         _("BT709"),
 600                         _("Unspecified"),
 601                         _("Unspecified"),
 602                         _("BT470M"),
 603                         _("BT470BG"),
 604                         _("SMPTE 170M (BT601)"),
 605                         _("SMPTE 240M"),
 606                         _("Film"),
 607                         _("BT2020"),
 608                         _("SMPTE ST 428-1 (CIE 1931 XYZ)"),
 609                         _("SMPTE ST 431-2 (2011)"),
 610                         _("SMPTE ST 432-1 D65 (2010)"), // 12
 611                         "", // 13
 612                         "", // 14
 613                         "", // 15
 614                         "", // 16
 615                         "", // 17
 616                         "", // 18
 617                         "", // 19
 618                         "", // 20
 619                         "", // 21
 620                         _("JEDEC P22")
 621                 };
 622
 623                 DCPOMATIC_ASSERT (AVCOL_PRI_NB <= 23);
 624                 p.push_back (UserProperty (UserProperty::VIDEO, _("Colour primaries"), primaries[_color_primaries.get_value_or(AVCOL_PRI_UNSPECIFIED)]));
 625
 626                 char const * transfers[] = {
 627                         _("Unspecified"),
 628                         _("BT709"),
 629                         _("Unspecified"),
 630                         _("Unspecified"),
 631                         _("Gamma 22 (BT470M)"),
 632                         _("Gamma 28 (BT470BG)"),
 633                         _("SMPTE 170M (BT601)"),
 634                         _("SMPTE 240M"),
 635                         _("Linear"),
 636                         _("Logarithmic (100:1 range)"),
 637                         _("Logarithmic (316:1 range)"),
 638                         _("IEC61966-2-4"),
 639                         _("BT1361 extended colour gamut"),
 640                         _("IEC61966-2-1 (sRGB or sYCC)"),
 641                         _("BT2020 for a 10-bit system"),
 642                         _("BT2020 for a 12-bit system"),
 643                         _("SMPTE ST 2084 for 10, 12, 14 and 16 bit systems"),
 644                         _("SMPTE ST 428-1"),
 645                         _("ARIB STD-B67 ('Hybrid log-gamma')")
 646                 };
 647
 648                 DCPOMATIC_ASSERT (AVCOL_TRC_NB <= 19);
 649                 p.push_back (UserProperty (UserProperty::VIDEO, _("Colour transfer characteristic"), transfers[_color_trc.get_value_or(AVCOL_TRC_UNSPECIFIED)]));
 650
 651                 char const * spaces[] = {
 652                         _("RGB / sRGB (IEC61966-2-1)"),
 653                         _("BT709"),
 654                         _("Unspecified"),
 655                         _("Unspecified"),
 656                         _("FCC"),
 657                         _("BT470BG (BT601-6)"),
 658                         _("SMPTE 170M (BT601-6)"),
 659                         _("SMPTE 240M"),
 660                         _("YCOCG"),
 661                         _("BT2020 non-constant luminance"),
 662                         _("BT2020 constant luminance"),
 663                         _("SMPTE 2085, Y'D'zD'x"),
 664                         _("Chroma-derived non-constant luminance"),
 665                         _("Chroma-derived constant luminance"),
 666                         _("BT2100")
 667                 };
 668
 669                 DCPOMATIC_ASSERT (AVCOL_SPC_NB == 15);
 670                 p.push_back (UserProperty (UserProperty::VIDEO, _("Colourspace"), spaces[_colorspace.get_value_or(AVCOL_SPC_UNSPECIFIED)]));
 671
 672                 if (_bits_per_pixel) {
 673                         p.push_back (UserProperty (UserProperty::VIDEO, _("Bits per pixel"), *_bits_per_pixel));
 674                 }
 675         }
 676
 677         if (audio) {
 678                 audio->add_properties (film, p);
 679         }
 680 }
 681
 682
 683 /** Our subtitle streams have colour maps, which can be changed, but
 684  *  they have no way of signalling that change.  As a hack, we have this
 685  *  method which callers can use when they've modified one of our subtitle
 686  *  streams.
 687  */
 688 void
 689 FFmpegContent::signal_subtitle_stream_changed ()
 690 {
 691         /* XXX: this is too late; really it should be before the change */
 692         ContentChangeSignaller cc (this, FFmpegContentProperty::SUBTITLE_STREAM);
 693 }
 694
 695
 696 vector<shared_ptr<FFmpegAudioStream>>
 697 FFmpegContent::ffmpeg_audio_streams () const
 698 {
 699         vector<shared_ptr<FFmpegAudioStream>> fa;
 700
 701         if (audio) {
 702                 for (auto i: audio->streams()) {
 703                         fa.push_back (dynamic_pointer_cast<FFmpegAudioStream>(i));
 704                 }
 705         }
 706
 707         return fa;
 708 }
 709
 710
 711 void
 712 FFmpegContent::take_settings_from (shared_ptr<const Content> c)
 713 {
 714         auto fc = dynamic_pointer_cast<const FFmpegContent> (c);
 715         if (!fc) {
 716                 return;
 717                 }
 718
 719         Content::take_settings_from (c);
 720         _filters = fc->_filters;
 721 }
 722