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