yt_dlp/postprocessor/ffmpeg.py

   1 import collections
   2 import contextvars
   3 import itertools
   4 import json
   5 import os
   6 import re
   7 import subprocess
   8 import time
   9
  10 from .common import PostProcessor
  11 from ..compat import functools, imghdr
  12 from ..utils import (
  13     MEDIA_EXTENSIONS,
  14     ISO639Utils,
  15     Popen,
  16     PostProcessingError,
  17     _get_exe_version_output,
  18     deprecation_warning,
  19     detect_exe_version,
  20     determine_ext,
  21     dfxp2srt,
  22     encodeArgument,
  23     encodeFilename,
  24     filter_dict,
  25     float_or_none,
  26     is_outdated_version,
  27     orderedSet,
  28     prepend_extension,
  29     replace_extension,
  30     shell_quote,
  31     traverse_obj,
  32     variadic,
  33     write_json_file,
  34 )
  35
  36 EXT_TO_OUT_FORMATS = {
  37     'aac': 'adts',
  38     'flac': 'flac',
  39     'm4a': 'ipod',
  40     'mka': 'matroska',
  41     'mkv': 'matroska',
  42     'mpg': 'mpeg',
  43     'ogv': 'ogg',
  44     'ts': 'mpegts',
  45     'wma': 'asf',
  46     'wmv': 'asf',
  47     'vtt': 'webvtt',
  48 }
  49 ACODECS = {
  50     # name: (ext, encoder, opts)
  51     'mp3': ('mp3', 'libmp3lame', ()),
  52     'aac': ('m4a', 'aac', ('-f', 'adts')),
  53     'm4a': ('m4a', 'aac', ('-bsf:a', 'aac_adtstoasc')),
  54     'opus': ('opus', 'libopus', ()),
  55     'vorbis': ('ogg', 'libvorbis', ()),
  56     'flac': ('flac', 'flac', ()),
  57     'alac': ('m4a', None, ('-acodec', 'alac')),
  58     'wav': ('wav', None, ('-f', 'wav')),
  59 }
  60
  61
  62 def create_mapping_re(supported):
  63     return re.compile(r'{0}(?:/{0})*$'.format(r'(?:\s*\w+\s*>)?\s*(?:%s)\s*' % '|'.join(supported)))
  64
  65
  66 def resolve_mapping(source, mapping):
  67     """
  68     Get corresponding item from a mapping string like 'A>B/C>D/E'
  69     @returns    (target, error_message)
  70     """
  71     for pair in mapping.lower().split('/'):
  72         kv = pair.split('>', 1)
  73         if len(kv) == 1 or kv[0].strip() == source:
  74             target = kv[-1].strip()
  75             if target == source:
  76                 return target, f'already is in target format {source}'
  77             return target, None
  78     return None, f'could not find a mapping for {source}'
  79
  80
  81 class FFmpegPostProcessorError(PostProcessingError):
  82     pass
  83
  84
  85 class FFmpegPostProcessor(PostProcessor):
  86     _ffmpeg_location = contextvars.ContextVar('ffmpeg_location', default=None)
  87
  88     def __init__(self, downloader=None):
  89         PostProcessor.__init__(self, downloader)
  90         self._prefer_ffmpeg = self.get_param('prefer_ffmpeg', True)
  91         self._paths = self._determine_executables()
  92
  93     @staticmethod
  94     def get_versions_and_features(downloader=None):
  95         pp = FFmpegPostProcessor(downloader)
  96         return pp._versions, pp._features
  97
  98     @staticmethod
  99     def get_versions(downloader=None):
 100         return FFmpegPostProcessor.get_versions_and_features(downloader)[0]
 101
 102     _ffmpeg_to_avconv = {'ffmpeg': 'avconv', 'ffprobe': 'avprobe'}
 103
 104     def _determine_executables(self):
 105         programs = [*self._ffmpeg_to_avconv.keys(), *self._ffmpeg_to_avconv.values()]
 106
 107         location = self.get_param('ffmpeg_location', self._ffmpeg_location.get())
 108         if location is None:
 109             return {p: p for p in programs}
 110
 111         if not os.path.exists(location):
 112             self.report_warning(
 113                 f'ffmpeg-location {location} does not exist! Continuing without ffmpeg', only_once=True)
 114             return {}
 115         elif os.path.isdir(location):
 116             dirname, basename, filename = location, None, None
 117         else:
 118             filename = os.path.basename(location)
 119             basename = next((p for p in programs if p in filename), 'ffmpeg')
 120             dirname = os.path.dirname(os.path.abspath(location))
 121             if basename in self._ffmpeg_to_avconv.keys():
 122                 self._prefer_ffmpeg = True
 123
 124         paths = {p: os.path.join(dirname, p) for p in programs}
 125         if basename and basename in filename:
 126             for p in programs:
 127                 path = os.path.join(dirname, filename.replace(basename, p))
 128                 if os.path.exists(path):
 129                     paths[p] = path
 130         if basename:
 131             paths[basename] = location
 132         return paths
 133
 134     _version_cache, _features_cache = {None: None}, {}
 135
 136     def _get_ffmpeg_version(self, prog):
 137         path = self._paths.get(prog)
 138         if path in self._version_cache:
 139             return self._version_cache[path], self._features_cache.get(path, {})
 140         out = _get_exe_version_output(path, ['-bsfs'])
 141         ver = detect_exe_version(out) if out else False
 142         if ver:
 143             regexs = [
 144                 r'(?:\d+:)?([0-9.]+)-[0-9]+ubuntu[0-9.]+$',  # Ubuntu, see [1]
 145                 r'n([0-9.]+)$',  # Arch Linux
 146                 # 1. http://www.ducea.com/2006/06/17/ubuntu-package-version-naming-explanation/
 147             ]
 148             for regex in regexs:
 149                 mobj = re.match(regex, ver)
 150                 if mobj:
 151                     ver = mobj.group(1)
 152         self._version_cache[path] = ver
 153         if prog != 'ffmpeg' or not out:
 154             return ver, {}
 155
 156         mobj = re.search(r'(?m)^\s+libavformat\s+(?:[0-9. ]+)\s+/\s+(?P<runtime>[0-9. ]+)', out)
 157         lavf_runtime_version = mobj.group('runtime').replace(' ', '') if mobj else None
 158         self._features_cache[path] = features = {
 159             'fdk': '--enable-libfdk-aac' in out,
 160             'setts': 'setts' in out.splitlines(),
 161             'needs_adtstoasc': is_outdated_version(lavf_runtime_version, '57.56.100', False),
 162         }
 163         return ver, features
 164
 165     @property
 166     def _versions(self):
 167         return filter_dict({self.basename: self._version, self.probe_basename: self._probe_version})
 168
 169     @functools.cached_property
 170     def basename(self):
 171         self._version  # run property
 172         return self.basename
 173
 174     @functools.cached_property
 175     def probe_basename(self):
 176         self._probe_version  # run property
 177         return self.probe_basename
 178
 179     def _get_version(self, kind):
 180         executables = (kind, )
 181         if not self._prefer_ffmpeg:
 182             executables = (kind, self._ffmpeg_to_avconv[kind])
 183         basename, version, features = next(filter(
 184             lambda x: x[1], ((p, *self._get_ffmpeg_version(p)) for p in executables)), (None, None, {}))
 185         if kind == 'ffmpeg':
 186             self.basename, self._features = basename, features
 187         else:
 188             self.probe_basename = basename
 189         if basename == self._ffmpeg_to_avconv[kind]:
 190             self.deprecated_feature(f'Support for {self._ffmpeg_to_avconv[kind]} is deprecated and '
 191                                     f'may be removed in a future version. Use {kind} instead')
 192         return version
 193
 194     @functools.cached_property
 195     def _version(self):
 196         return self._get_version('ffmpeg')
 197
 198     @functools.cached_property
 199     def _probe_version(self):
 200         return self._get_version('ffprobe')
 201
 202     @property
 203     def available(self):
 204         return self.basename is not None
 205
 206     @property
 207     def executable(self):
 208         return self._paths.get(self.basename)
 209
 210     @property
 211     def probe_available(self):
 212         return self.probe_basename is not None
 213
 214     @property
 215     def probe_executable(self):
 216         return self._paths.get(self.probe_basename)
 217
 218     @staticmethod
 219     def stream_copy_opts(copy=True, *, ext=None):
 220         yield from ('-map', '0')
 221         # Don't copy Apple TV chapters track, bin_data
 222         # See https://github.com/yt-dlp/yt-dlp/issues/2, #19042, #19024, https://trac.ffmpeg.org/ticket/6016
 223         yield from ('-dn', '-ignore_unknown')
 224         if copy:
 225             yield from ('-c', 'copy')
 226         if ext in ('mp4', 'mov', 'm4a'):
 227             yield from ('-c:s', 'mov_text')
 228
 229     def check_version(self):
 230         if not self.available:
 231             raise FFmpegPostProcessorError('ffmpeg not found. Please install or provide the path using --ffmpeg-location')
 232
 233         required_version = '10-0' if self.basename == 'avconv' else '1.0'
 234         if is_outdated_version(self._version, required_version):
 235             self.report_warning(f'Your copy of {self.basename} is outdated, update {self.basename} '
 236                                 f'to version {required_version} or newer if you encounter any errors')
 237
 238     def get_audio_codec(self, path):
 239         if not self.probe_available and not self.available:
 240             raise PostProcessingError('ffprobe and ffmpeg not found. Please install or provide the path using --ffmpeg-location')
 241         try:
 242             if self.probe_available:
 243                 cmd = [
 244                     encodeFilename(self.probe_executable, True),
 245                     encodeArgument('-show_streams')]
 246             else:
 247                 cmd = [
 248                     encodeFilename(self.executable, True),
 249                     encodeArgument('-i')]
 250             cmd.append(encodeFilename(self._ffmpeg_filename_argument(path), True))
 251             self.write_debug(f'{self.basename} command line: {shell_quote(cmd)}')
 252             stdout, stderr, returncode = Popen.run(
 253                 cmd, text=True, stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
 254             if returncode != (0 if self.probe_available else 1):
 255                 return None
 256         except OSError:
 257             return None
 258         output = stdout if self.probe_available else stderr
 259         if self.probe_available:
 260             audio_codec = None
 261             for line in output.split('\n'):
 262                 if line.startswith('codec_name='):
 263                     audio_codec = line.split('=')[1].strip()
 264                 elif line.strip() == 'codec_type=audio' and audio_codec is not None:
 265                     return audio_codec
 266         else:
 267             # Stream #FILE_INDEX:STREAM_INDEX[STREAM_ID](LANGUAGE): CODEC_TYPE: CODEC_NAME
 268             mobj = re.search(
 269                 r'Stream\s*#\d+:\d+(?:\[0x[0-9a-f]+\])?(?:\([a-z]{3}\))?:\s*Audio:\s*([0-9a-z]+)',
 270                 output)
 271             if mobj:
 272                 return mobj.group(1)
 273         return None
 274
 275     def get_metadata_object(self, path, opts=[]):
 276         if self.probe_basename != 'ffprobe':
 277             if self.probe_available:
 278                 self.report_warning('Only ffprobe is supported for metadata extraction')
 279             raise PostProcessingError('ffprobe not found. Please install or provide the path using --ffmpeg-location')
 280         self.check_version()
 281
 282         cmd = [
 283             encodeFilename(self.probe_executable, True),
 284             encodeArgument('-hide_banner'),
 285             encodeArgument('-show_format'),
 286             encodeArgument('-show_streams'),
 287             encodeArgument('-print_format'),
 288             encodeArgument('json'),
 289         ]
 290
 291         cmd += opts
 292         cmd.append(self._ffmpeg_filename_argument(path))
 293         self.write_debug(f'ffprobe command line: {shell_quote(cmd)}')
 294         stdout, _, _ = Popen.run(cmd, text=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE, stdin=subprocess.PIPE)
 295         return json.loads(stdout)
 296
 297     def get_stream_number(self, path, keys, value):
 298         streams = self.get_metadata_object(path)['streams']
 299         num = next(
 300             (i for i, stream in enumerate(streams) if traverse_obj(stream, keys, casesense=False) == value),
 301             None)
 302         return num, len(streams)
 303
 304     def _get_real_video_duration(self, filepath, fatal=True):
 305         try:
 306             duration = float_or_none(
 307                 traverse_obj(self.get_metadata_object(filepath), ('format', 'duration')))
 308             if not duration:
 309                 raise PostProcessingError('ffprobe returned empty duration')
 310             return duration
 311         except PostProcessingError as e:
 312             if fatal:
 313                 raise PostProcessingError(f'Unable to determine video duration: {e.msg}')
 314
 315     def _duration_mismatch(self, d1, d2, tolerance=2):
 316         if not d1 or not d2:
 317             return None
 318         # The duration is often only known to nearest second. So there can be <1sec disparity natually.
 319         # Further excuse an additional <1sec difference.
 320         return abs(d1 - d2) > tolerance
 321
 322     def run_ffmpeg_multiple_files(self, input_paths, out_path, opts, **kwargs):
 323         return self.real_run_ffmpeg(
 324             [(path, []) for path in input_paths],
 325             [(out_path, opts)], **kwargs)
 326
 327     def real_run_ffmpeg(self, input_path_opts, output_path_opts, *, expected_retcodes=(0,)):
 328         self.check_version()
 329
 330         oldest_mtime = min(
 331             os.stat(encodeFilename(path)).st_mtime for path, _ in input_path_opts if path)
 332
 333         cmd = [encodeFilename(self.executable, True), encodeArgument('-y')]
 334         # avconv does not have repeat option
 335         if self.basename == 'ffmpeg':
 336             cmd += [encodeArgument('-loglevel'), encodeArgument('repeat+info')]
 337
 338         def make_args(file, args, name, number):
 339             keys = ['_%s%d' % (name, number), '_%s' % name]
 340             if name == 'o':
 341                 args += ['-movflags', '+faststart']
 342                 if number == 1:
 343                     keys.append('')
 344             args += self._configuration_args(self.basename, keys)
 345             if name == 'i':
 346                 args.append('-i')
 347             return (
 348                 [encodeArgument(arg) for arg in args]
 349                 + [encodeFilename(self._ffmpeg_filename_argument(file), True)])
 350
 351         for arg_type, path_opts in (('i', input_path_opts), ('o', output_path_opts)):
 352             cmd += itertools.chain.from_iterable(
 353                 make_args(path, list(opts), arg_type, i + 1)
 354                 for i, (path, opts) in enumerate(path_opts) if path)
 355
 356         self.write_debug('ffmpeg command line: %s' % shell_quote(cmd))
 357         _, stderr, returncode = Popen.run(
 358             cmd, text=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE, stdin=subprocess.PIPE)
 359         if returncode not in variadic(expected_retcodes):
 360             self.write_debug(stderr)
 361             raise FFmpegPostProcessorError(stderr.strip().splitlines()[-1])
 362         for out_path, _ in output_path_opts:
 363             if out_path:
 364                 self.try_utime(out_path, oldest_mtime, oldest_mtime)
 365         return stderr
 366
 367     def run_ffmpeg(self, path, out_path, opts, **kwargs):
 368         return self.run_ffmpeg_multiple_files([path], out_path, opts, **kwargs)
 369
 370     @staticmethod
 371     def _ffmpeg_filename_argument(fn):
 372         # Always use 'file:' because the filename may contain ':' (ffmpeg
 373         # interprets that as a protocol) or can start with '-' (-- is broken in
 374         # ffmpeg, see https://ffmpeg.org/trac/ffmpeg/ticket/2127 for details)
 375         # Also leave '-' intact in order not to break streaming to stdout.
 376         if fn.startswith(('http://', 'https://')):
 377             return fn
 378         return 'file:' + fn if fn != '-' else fn
 379
 380     @staticmethod
 381     def _quote_for_ffmpeg(string):
 382         # See https://ffmpeg.org/ffmpeg-utils.html#toc-Quoting-and-escaping
 383         # A sequence of '' produces '\'''\'';
 384         # final replace removes the empty '' between \' \'.
 385         string = string.replace("'", r"'\''").replace("'''", "'")
 386         # Handle potential ' at string boundaries.
 387         string = string[1:] if string[0] == "'" else "'" + string
 388         return string[:-1] if string[-1] == "'" else string + "'"
 389
 390     def force_keyframes(self, filename, timestamps):
 391         timestamps = orderedSet(timestamps)
 392         if timestamps[0] == 0:
 393             timestamps = timestamps[1:]
 394         keyframe_file = prepend_extension(filename, 'keyframes.temp')
 395         self.to_screen(f'Re-encoding "{filename}" with appropriate keyframes')
 396         self.run_ffmpeg(filename, keyframe_file, [
 397             *self.stream_copy_opts(False, ext=determine_ext(filename)),
 398             '-force_key_frames', ','.join(f'{t:.6f}' for t in timestamps)])
 399         return keyframe_file
 400
 401     def concat_files(self, in_files, out_file, concat_opts=None):
 402         """
 403         Use concat demuxer to concatenate multiple files having identical streams.
 404
 405         Only inpoint, outpoint, and duration concat options are supported.
 406         See https://ffmpeg.org/ffmpeg-formats.html#concat-1 for details
 407         """
 408         concat_file = f'{out_file}.concat'
 409         self.write_debug(f'Writing concat spec to {concat_file}')
 410         with open(concat_file, 'wt', encoding='utf-8') as f:
 411             f.writelines(self._concat_spec(in_files, concat_opts))
 412
 413         out_flags = list(self.stream_copy_opts(ext=determine_ext(out_file)))
 414
 415         self.real_run_ffmpeg(
 416             [(concat_file, ['-hide_banner', '-nostdin', '-f', 'concat', '-safe', '0'])],
 417             [(out_file, out_flags)])
 418         self._delete_downloaded_files(concat_file)
 419
 420     @classmethod
 421     def _concat_spec(cls, in_files, concat_opts=None):
 422         if concat_opts is None:
 423             concat_opts = [{}] * len(in_files)
 424         yield 'ffconcat version 1.0\n'
 425         for file, opts in zip(in_files, concat_opts):
 426             yield f'file {cls._quote_for_ffmpeg(cls._ffmpeg_filename_argument(file))}\n'
 427             # Iterate explicitly to yield the following directives in order, ignoring the rest.
 428             for directive in 'inpoint', 'outpoint', 'duration':
 429                 if directive in opts:
 430                     yield f'{directive} {opts[directive]}\n'
 431
 432
 433 class FFmpegExtractAudioPP(FFmpegPostProcessor):
 434     COMMON_AUDIO_EXTS = MEDIA_EXTENSIONS.common_audio + ('wma', )
 435     SUPPORTED_EXTS = tuple(ACODECS.keys())
 436     FORMAT_RE = create_mapping_re(('best', *SUPPORTED_EXTS))
 437
 438     def __init__(self, downloader=None, preferredcodec=None, preferredquality=None, nopostoverwrites=False):
 439         FFmpegPostProcessor.__init__(self, downloader)
 440         self.mapping = preferredcodec or 'best'
 441         self._preferredquality = float_or_none(preferredquality)
 442         self._nopostoverwrites = nopostoverwrites
 443
 444     def _quality_args(self, codec):
 445         if self._preferredquality is None:
 446             return []
 447         elif self._preferredquality > 10:
 448             return ['-b:a', f'{self._preferredquality}k']
 449
 450         limits = {
 451             'libmp3lame': (10, 0),
 452             'libvorbis': (0, 10),
 453             # FFmpeg's AAC encoder does not have an upper limit for the value of -q:a.
 454             # Experimentally, with values over 4, bitrate changes were minimal or non-existent
 455             'aac': (0.1, 4),
 456             'libfdk_aac': (1, 5),
 457         }.get(codec)
 458         if not limits:
 459             return []
 460
 461         q = limits[1] + (limits[0] - limits[1]) * (self._preferredquality / 10)
 462         if codec == 'libfdk_aac':
 463             return ['-vbr', f'{int(q)}']
 464         return ['-q:a', f'{q}']
 465
 466     def run_ffmpeg(self, path, out_path, codec, more_opts):
 467         if codec is None:
 468             acodec_opts = []
 469         else:
 470             acodec_opts = ['-acodec', codec]
 471         opts = ['-vn'] + acodec_opts + more_opts
 472         try:
 473             FFmpegPostProcessor.run_ffmpeg(self, path, out_path, opts)
 474         except FFmpegPostProcessorError as err:
 475             raise PostProcessingError(f'audio conversion failed: {err.msg}')
 476
 477     @PostProcessor._restrict_to(images=False)
 478     def run(self, information):
 479         orig_path = path = information['filepath']
 480         target_format, _skip_msg = resolve_mapping(information['ext'], self.mapping)
 481         if target_format == 'best' and information['ext'] in self.COMMON_AUDIO_EXTS:
 482             target_format, _skip_msg = None, 'the file is already in a common audio format'
 483         if not target_format:
 484             self.to_screen(f'Not converting audio {orig_path}; {_skip_msg}')
 485             return [], information
 486
 487         filecodec = self.get_audio_codec(path)
 488         if filecodec is None:
 489             raise PostProcessingError('WARNING: unable to obtain file audio codec with ffprobe')
 490
 491         if filecodec == 'aac' and target_format in ('m4a', 'best'):
 492             # Lossless, but in another container
 493             extension, _, more_opts, acodec = *ACODECS['m4a'], 'copy'
 494         elif target_format == 'best' or target_format == filecodec:
 495             # Lossless if possible
 496             try:
 497                 extension, _, more_opts, acodec = *ACODECS[filecodec], 'copy'
 498             except KeyError:
 499                 extension, acodec, more_opts = ACODECS['mp3']
 500         else:
 501             # We convert the audio (lossy if codec is lossy)
 502             extension, acodec, more_opts = ACODECS[target_format]
 503             if acodec == 'aac' and self._features.get('fdk'):
 504                 acodec, more_opts = 'libfdk_aac', []
 505
 506         more_opts = list(more_opts)
 507         if acodec != 'copy':
 508             more_opts = self._quality_args(acodec)
 509
 510         # not os.path.splitext, since the latter does not work on unicode in all setups
 511         temp_path = new_path = f'{path.rpartition(".")[0]}.{extension}'
 512
 513         if new_path == path:
 514             if acodec == 'copy':
 515                 self.to_screen(f'Not converting audio {orig_path}; file is already in target format {target_format}')
 516                 return [], information
 517             orig_path = prepend_extension(path, 'orig')
 518             temp_path = prepend_extension(path, 'temp')
 519         if (self._nopostoverwrites and os.path.exists(encodeFilename(new_path))
 520                 and os.path.exists(encodeFilename(orig_path))):
 521             self.to_screen('Post-process file %s exists, skipping' % new_path)
 522             return [], information
 523
 524         self.to_screen(f'Destination: {new_path}')
 525         self.run_ffmpeg(path, temp_path, acodec, more_opts)
 526
 527         os.replace(path, orig_path)
 528         os.replace(temp_path, new_path)
 529         information['filepath'] = new_path
 530         information['ext'] = extension
 531
 532         # Try to update the date time for extracted audio file.
 533         if information.get('filetime') is not None:
 534             self.try_utime(
 535                 new_path, time.time(), information['filetime'], errnote='Cannot update utime of audio file')
 536
 537         return [orig_path], information
 538
 539
 540 class FFmpegVideoConvertorPP(FFmpegPostProcessor):
 541     SUPPORTED_EXTS = (*MEDIA_EXTENSIONS.common_video, *sorted(MEDIA_EXTENSIONS.common_audio + ('aac', 'vorbis')))
 542     FORMAT_RE = create_mapping_re(SUPPORTED_EXTS)
 543     _ACTION = 'converting'
 544
 545     def __init__(self, downloader=None, preferedformat=None):
 546         super().__init__(downloader)
 547         self.mapping = preferedformat
 548
 549     @staticmethod
 550     def _options(target_ext):
 551         yield from FFmpegPostProcessor.stream_copy_opts(False)
 552         if target_ext == 'avi':
 553             yield from ('-c:v', 'libxvid', '-vtag', 'XVID')
 554
 555     @PostProcessor._restrict_to(images=False)
 556     def run(self, info):
 557         filename, source_ext = info['filepath'], info['ext'].lower()
 558         target_ext, _skip_msg = resolve_mapping(source_ext, self.mapping)
 559         if _skip_msg:
 560             self.to_screen(f'Not {self._ACTION} media file "{filename}"; {_skip_msg}')
 561             return [], info
 562
 563         outpath = replace_extension(filename, target_ext, source_ext)
 564         self.to_screen(f'{self._ACTION.title()} video from {source_ext} to {target_ext}; Destination: {outpath}')
 565         self.run_ffmpeg(filename, outpath, self._options(target_ext))
 566
 567         info['filepath'] = outpath
 568         info['format'] = info['ext'] = target_ext
 569         return [filename], info
 570
 571
 572 class FFmpegVideoRemuxerPP(FFmpegVideoConvertorPP):
 573     _ACTION = 'remuxing'
 574
 575     @staticmethod
 576     def _options(target_ext):
 577         return FFmpegPostProcessor.stream_copy_opts()
 578
 579
 580 class FFmpegEmbedSubtitlePP(FFmpegPostProcessor):
 581     SUPPORTED_EXTS = ('mp4', 'mov', 'm4a', 'webm', 'mkv', 'mka')
 582
 583     def __init__(self, downloader=None, already_have_subtitle=False):
 584         super().__init__(downloader)
 585         self._already_have_subtitle = already_have_subtitle
 586
 587     @PostProcessor._restrict_to(images=False)
 588     def run(self, info):
 589         if info['ext'] not in self.SUPPORTED_EXTS:
 590             self.to_screen(f'Subtitles can only be embedded in {", ".join(self.SUPPORTED_EXTS)} files')
 591             return [], info
 592         subtitles = info.get('requested_subtitles')
 593         if not subtitles:
 594             self.to_screen('There aren\'t any subtitles to embed')
 595             return [], info
 596
 597         filename = info['filepath']
 598
 599         # Disabled temporarily. There needs to be a way to override this
 600         # in case of duration actually mismatching in extractor
 601         # See: https://github.com/yt-dlp/yt-dlp/issues/1870, https://github.com/yt-dlp/yt-dlp/issues/1385
 602         '''
 603         if info.get('duration') and not info.get('__real_download') and self._duration_mismatch(
 604                 self._get_real_video_duration(filename, False), info['duration']):
 605             self.to_screen(f'Skipping {self.pp_key()} since the real and expected durations mismatch')
 606             return [], info
 607         '''
 608
 609         ext = info['ext']
 610         sub_langs, sub_names, sub_filenames = [], [], []
 611         webm_vtt_warn = False
 612         mp4_ass_warn = False
 613
 614         for lang, sub_info in subtitles.items():
 615             if not os.path.exists(sub_info.get('filepath', '')):
 616                 self.report_warning(f'Skipping embedding {lang} subtitle because the file is missing')
 617                 continue
 618             sub_ext = sub_info['ext']
 619             if sub_ext == 'json':
 620                 self.report_warning('JSON subtitles cannot be embedded')
 621             elif ext != 'webm' or ext == 'webm' and sub_ext == 'vtt':
 622                 sub_langs.append(lang)
 623                 sub_names.append(sub_info.get('name'))
 624                 sub_filenames.append(sub_info['filepath'])
 625             else:
 626                 if not webm_vtt_warn and ext == 'webm' and sub_ext != 'vtt':
 627                     webm_vtt_warn = True
 628                     self.report_warning('Only WebVTT subtitles can be embedded in webm files')
 629             if not mp4_ass_warn and ext == 'mp4' and sub_ext == 'ass':
 630                 mp4_ass_warn = True
 631                 self.report_warning('ASS subtitles cannot be properly embedded in mp4 files; expect issues')
 632
 633         if not sub_langs:
 634             return [], info
 635
 636         input_files = [filename] + sub_filenames
 637
 638         opts = [
 639             *self.stream_copy_opts(ext=info['ext']),
 640             # Don't copy the existing subtitles, we may be running the
 641             # postprocessor a second time
 642             '-map', '-0:s',
 643         ]
 644         for i, (lang, name) in enumerate(zip(sub_langs, sub_names)):
 645             opts.extend(['-map', '%d:0' % (i + 1)])
 646             lang_code = ISO639Utils.short2long(lang) or lang
 647             opts.extend(['-metadata:s:s:%d' % i, 'language=%s' % lang_code])
 648             if name:
 649                 opts.extend(['-metadata:s:s:%d' % i, 'handler_name=%s' % name,
 650                              '-metadata:s:s:%d' % i, 'title=%s' % name])
 651
 652         temp_filename = prepend_extension(filename, 'temp')
 653         self.to_screen('Embedding subtitles in "%s"' % filename)
 654         self.run_ffmpeg_multiple_files(input_files, temp_filename, opts)
 655         os.replace(temp_filename, filename)
 656
 657         files_to_delete = [] if self._already_have_subtitle else sub_filenames
 658         return files_to_delete, info
 659
 660
 661 class FFmpegMetadataPP(FFmpegPostProcessor):
 662
 663     def __init__(self, downloader, add_metadata=True, add_chapters=True, add_infojson='if_exists'):
 664         FFmpegPostProcessor.__init__(self, downloader)
 665         self._add_metadata = add_metadata
 666         self._add_chapters = add_chapters
 667         self._add_infojson = add_infojson
 668
 669     @staticmethod
 670     def _options(target_ext):
 671         audio_only = target_ext == 'm4a'
 672         yield from FFmpegPostProcessor.stream_copy_opts(not audio_only)
 673         if audio_only:
 674             yield from ('-vn', '-acodec', 'copy')
 675
 676     @PostProcessor._restrict_to(images=False)
 677     def run(self, info):
 678         filename, metadata_filename = info['filepath'], None
 679         files_to_delete, options = [], []
 680         if self._add_chapters and info.get('chapters'):
 681             metadata_filename = replace_extension(filename, 'meta')
 682             options.extend(self._get_chapter_opts(info['chapters'], metadata_filename))
 683             files_to_delete.append(metadata_filename)
 684         if self._add_metadata:
 685             options.extend(self._get_metadata_opts(info))
 686
 687         if self._add_infojson:
 688             if info['ext'] in ('mkv', 'mka'):
 689                 infojson_filename = info.get('infojson_filename')
 690                 options.extend(self._get_infojson_opts(info, infojson_filename))
 691                 if not infojson_filename:
 692                     files_to_delete.append(info.get('infojson_filename'))
 693             elif self._add_infojson is True:
 694                 self.to_screen('The info-json can only be attached to mkv/mka files')
 695
 696         if not options:
 697             self.to_screen('There isn\'t any metadata to add')
 698             return [], info
 699
 700         temp_filename = prepend_extension(filename, 'temp')
 701         self.to_screen('Adding metadata to "%s"' % filename)
 702         self.run_ffmpeg_multiple_files(
 703             (filename, metadata_filename), temp_filename,
 704             itertools.chain(self._options(info['ext']), *options))
 705         self._delete_downloaded_files(*files_to_delete)
 706         os.replace(temp_filename, filename)
 707         return [], info
 708
 709     @staticmethod
 710     def _get_chapter_opts(chapters, metadata_filename):
 711         with open(metadata_filename, 'wt', encoding='utf-8') as f:
 712             def ffmpeg_escape(text):
 713                 return re.sub(r'([\\=;#\n])', r'\\\1', text)
 714
 715             metadata_file_content = ';FFMETADATA1\n'
 716             for chapter in chapters:
 717                 metadata_file_content += '[CHAPTER]\nTIMEBASE=1/1000\n'
 718                 metadata_file_content += 'START=%d\n' % (chapter['start_time'] * 1000)
 719                 metadata_file_content += 'END=%d\n' % (chapter['end_time'] * 1000)
 720                 chapter_title = chapter.get('title')
 721                 if chapter_title:
 722                     metadata_file_content += 'title=%s\n' % ffmpeg_escape(chapter_title)
 723             f.write(metadata_file_content)
 724         yield ('-map_metadata', '1')
 725
 726     def _get_metadata_opts(self, info):
 727         meta_prefix = 'meta'
 728         metadata = collections.defaultdict(dict)
 729
 730         def add(meta_list, info_list=None):
 731             value = next((
 732                 str(info[key]) for key in [f'{meta_prefix}_'] + list(variadic(info_list or meta_list))
 733                 if info.get(key) is not None), None)
 734             if value not in ('', None):
 735                 value = value.replace('\0', '')  # nul character cannot be passed in command line
 736                 metadata['common'].update({meta_f: value for meta_f in variadic(meta_list)})
 737
 738         # Info on media metadata/metadata supported by ffmpeg:
 739         # https://wiki.multimedia.cx/index.php/FFmpeg_Metadata
 740         # https://kdenlive.org/en/project/adding-meta-data-to-mp4-video/
 741         # https://kodi.wiki/view/Video_file_tagging
 742
 743         add('title', ('track', 'title'))
 744         add('date', 'upload_date')
 745         add(('description', 'synopsis'), 'description')
 746         add(('purl', 'comment'), 'webpage_url')
 747         add('track', 'track_number')
 748         add('artist', ('artist', 'creator', 'uploader', 'uploader_id'))
 749         add('genre')
 750         add('album')
 751         add('album_artist')
 752         add('disc', 'disc_number')
 753         add('show', 'series')
 754         add('season_number')
 755         add('episode_id', ('episode', 'episode_id'))
 756         add('episode_sort', 'episode_number')
 757         if 'embed-metadata' in self.get_param('compat_opts', []):
 758             add('comment', 'description')
 759             metadata['common'].pop('synopsis', None)
 760
 761         meta_regex = rf'{re.escape(meta_prefix)}(?P<i>\d+)?_(?P<key>.+)'
 762         for key, value in info.items():
 763             mobj = re.fullmatch(meta_regex, key)
 764             if value is not None and mobj:
 765                 metadata[mobj.group('i') or 'common'][mobj.group('key')] = value.replace('\0', '')
 766
 767         # Write id3v1 metadata also since Windows Explorer can't handle id3v2 tags
 768         yield ('-write_id3v1', '1')
 769
 770         for name, value in metadata['common'].items():
 771             yield ('-metadata', f'{name}={value}')
 772
 773         stream_idx = 0
 774         for fmt in info.get('requested_formats') or []:
 775             stream_count = 2 if 'none' not in (fmt.get('vcodec'), fmt.get('acodec')) else 1
 776             lang = ISO639Utils.short2long(fmt.get('language') or '') or fmt.get('language')
 777             for i in range(stream_idx, stream_idx + stream_count):
 778                 if lang:
 779                     metadata[str(i)].setdefault('language', lang)
 780                 for name, value in metadata[str(i)].items():
 781                     yield (f'-metadata:s:{i}', f'{name}={value}')
 782             stream_idx += stream_count
 783
 784     def _get_infojson_opts(self, info, infofn):
 785         if not infofn or not os.path.exists(infofn):
 786             if self._add_infojson is not True:
 787                 return
 788             infofn = infofn or '%s.temp' % (
 789                 self._downloader.prepare_filename(info, 'infojson')
 790                 or replace_extension(self._downloader.prepare_filename(info), 'info.json', info['ext']))
 791             if not self._downloader._ensure_dir_exists(infofn):
 792                 return
 793             self.write_debug(f'Writing info-json to: {infofn}')
 794             write_json_file(self._downloader.sanitize_info(info, self.get_param('clean_infojson', True)), infofn)
 795             info['infojson_filename'] = infofn
 796
 797         old_stream, new_stream = self.get_stream_number(info['filepath'], ('tags', 'mimetype'), 'application/json')
 798         if old_stream is not None:
 799             yield ('-map', '-0:%d' % old_stream)
 800             new_stream -= 1
 801
 802         yield (
 803             '-attach', infofn,
 804             f'-metadata:s:{new_stream}', 'mimetype=application/json',
 805             f'-metadata:s:{new_stream}', 'filename=info.json',
 806         )
 807
 808
 809 class FFmpegMergerPP(FFmpegPostProcessor):
 810     SUPPORTED_EXTS = MEDIA_EXTENSIONS.common_video
 811
 812     @PostProcessor._restrict_to(images=False)
 813     def run(self, info):
 814         filename = info['filepath']
 815         temp_filename = prepend_extension(filename, 'temp')
 816         args = ['-c', 'copy']
 817         audio_streams = 0
 818         for (i, fmt) in enumerate(info['requested_formats']):
 819             if fmt.get('acodec') != 'none':
 820                 args.extend(['-map', f'{i}:a:0'])
 821                 aac_fixup = fmt['protocol'].startswith('m3u8') and self.get_audio_codec(fmt['filepath']) == 'aac'
 822                 if aac_fixup:
 823                     args.extend([f'-bsf:a:{audio_streams}', 'aac_adtstoasc'])
 824                 audio_streams += 1
 825             if fmt.get('vcodec') != 'none':
 826                 args.extend(['-map', '%u:v:0' % (i)])
 827         self.to_screen('Merging formats into "%s"' % filename)
 828         self.run_ffmpeg_multiple_files(info['__files_to_merge'], temp_filename, args)
 829         os.rename(encodeFilename(temp_filename), encodeFilename(filename))
 830         return info['__files_to_merge'], info
 831
 832     def can_merge(self):
 833         # TODO: figure out merge-capable ffmpeg version
 834         if self.basename != 'avconv':
 835             return True
 836
 837         required_version = '10-0'
 838         if is_outdated_version(
 839                 self._versions[self.basename], required_version):
 840             warning = ('Your copy of %s is outdated and unable to properly mux separate video and audio files, '
 841                        'yt-dlp will download single file media. '
 842                        'Update %s to version %s or newer to fix this.') % (
 843                            self.basename, self.basename, required_version)
 844             self.report_warning(warning)
 845             return False
 846         return True
 847
 848
 849 class FFmpegFixupPostProcessor(FFmpegPostProcessor):
 850     def _fixup(self, msg, filename, options):
 851         temp_filename = prepend_extension(filename, 'temp')
 852
 853         self.to_screen(f'{msg} of "{filename}"')
 854         self.run_ffmpeg(filename, temp_filename, options)
 855
 856         os.replace(temp_filename, filename)
 857
 858
 859 class FFmpegFixupStretchedPP(FFmpegFixupPostProcessor):
 860     @PostProcessor._restrict_to(images=False, audio=False)
 861     def run(self, info):
 862         stretched_ratio = info.get('stretched_ratio')
 863         if stretched_ratio not in (None, 1):
 864             self._fixup('Fixing aspect ratio', info['filepath'], [
 865                 *self.stream_copy_opts(), '-aspect', '%f' % stretched_ratio])
 866         return [], info
 867
 868
 869 class FFmpegFixupM4aPP(FFmpegFixupPostProcessor):
 870     @PostProcessor._restrict_to(images=False, video=False)
 871     def run(self, info):
 872         if info.get('container') == 'm4a_dash':
 873             self._fixup('Correcting container', info['filepath'], [*self.stream_copy_opts(), '-f', 'mp4'])
 874         return [], info
 875
 876
 877 class FFmpegFixupM3u8PP(FFmpegFixupPostProcessor):
 878     def _needs_fixup(self, info):
 879         yield info['ext'] in ('mp4', 'm4a')
 880         yield info['protocol'].startswith('m3u8')
 881         try:
 882             metadata = self.get_metadata_object(info['filepath'])
 883         except PostProcessingError as e:
 884             self.report_warning(f'Unable to extract metadata: {e.msg}')
 885             yield True
 886         else:
 887             yield traverse_obj(metadata, ('format', 'format_name'), casesense=False) == 'mpegts'
 888
 889     @PostProcessor._restrict_to(images=False)
 890     def run(self, info):
 891         if all(self._needs_fixup(info)):
 892             self._fixup('Fixing MPEG-TS in MP4 container', info['filepath'], [
 893                 *self.stream_copy_opts(), '-f', 'mp4', '-bsf:a', 'aac_adtstoasc'])
 894         return [], info
 895
 896
 897 class FFmpegFixupTimestampPP(FFmpegFixupPostProcessor):
 898
 899     def __init__(self, downloader=None, trim=0.001):
 900         # "trim" should be used when the video contains unintended packets
 901         super().__init__(downloader)
 902         assert isinstance(trim, (int, float))
 903         self.trim = str(trim)
 904
 905     @PostProcessor._restrict_to(images=False)
 906     def run(self, info):
 907         if not self._features.get('setts'):
 908             self.report_warning(
 909                 'A re-encode is needed to fix timestamps in older versions of ffmpeg. '
 910                 'Please install ffmpeg 4.4 or later to fixup without re-encoding')
 911             opts = ['-vf', 'setpts=PTS-STARTPTS']
 912         else:
 913             opts = ['-c', 'copy', '-bsf', 'setts=ts=TS-STARTPTS']
 914         self._fixup('Fixing frame timestamp', info['filepath'], opts + [*self.stream_copy_opts(False), '-ss', self.trim])
 915         return [], info
 916
 917
 918 class FFmpegCopyStreamPP(FFmpegFixupPostProcessor):
 919     MESSAGE = 'Copying stream'
 920
 921     @PostProcessor._restrict_to(images=False)
 922     def run(self, info):
 923         self._fixup(self.MESSAGE, info['filepath'], self.stream_copy_opts())
 924         return [], info
 925
 926
 927 class FFmpegFixupDurationPP(FFmpegCopyStreamPP):
 928     MESSAGE = 'Fixing video duration'
 929
 930
 931 class FFmpegFixupDuplicateMoovPP(FFmpegCopyStreamPP):
 932     MESSAGE = 'Fixing duplicate MOOV atoms'
 933
 934
 935 class FFmpegSubtitlesConvertorPP(FFmpegPostProcessor):
 936     SUPPORTED_EXTS = MEDIA_EXTENSIONS.subtitles
 937
 938     def __init__(self, downloader=None, format=None):
 939         super().__init__(downloader)
 940         self.format = format
 941
 942     def run(self, info):
 943         subs = info.get('requested_subtitles')
 944         new_ext = self.format
 945         new_format = new_ext
 946         if new_format == 'vtt':
 947             new_format = 'webvtt'
 948         if subs is None:
 949             self.to_screen('There aren\'t any subtitles to convert')
 950             return [], info
 951         self.to_screen('Converting subtitles')
 952         sub_filenames = []
 953         for lang, sub in subs.items():
 954             if not os.path.exists(sub.get('filepath', '')):
 955                 self.report_warning(f'Skipping embedding {lang} subtitle because the file is missing')
 956                 continue
 957             ext = sub['ext']
 958             if ext == new_ext:
 959                 self.to_screen('Subtitle file for %s is already in the requested format' % new_ext)
 960                 continue
 961             elif ext == 'json':
 962                 self.to_screen(
 963                     'You have requested to convert json subtitles into another format, '
 964                     'which is currently not possible')
 965                 continue
 966             old_file = sub['filepath']
 967             sub_filenames.append(old_file)
 968             new_file = replace_extension(old_file, new_ext)
 969
 970             if ext in ('dfxp', 'ttml', 'tt'):
 971                 self.report_warning(
 972                     'You have requested to convert dfxp (TTML) subtitles into another format, '
 973                     'which results in style information loss')
 974
 975                 dfxp_file = old_file
 976                 srt_file = replace_extension(old_file, 'srt')
 977
 978                 with open(dfxp_file, 'rb') as f:
 979                     srt_data = dfxp2srt(f.read())
 980
 981                 with open(srt_file, 'wt', encoding='utf-8') as f:
 982                     f.write(srt_data)
 983                 old_file = srt_file
 984
 985                 subs[lang] = {
 986                     'ext': 'srt',
 987                     'data': srt_data,
 988                     'filepath': srt_file,
 989                 }
 990
 991                 if new_ext == 'srt':
 992                     continue
 993                 else:
 994                     sub_filenames.append(srt_file)
 995
 996             self.run_ffmpeg(old_file, new_file, ['-f', new_format])
 997
 998             with open(new_file, encoding='utf-8') as f:
 999                 subs[lang] = {
1000                     'ext': new_ext,
1001                     'data': f.read(),
1002                     'filepath': new_file,
1003                 }
1004
1005             info['__files_to_move'][new_file] = replace_extension(
1006                 info['__files_to_move'][sub['filepath']], new_ext)
1007
1008         return sub_filenames, info
1009
1010
1011 class FFmpegSplitChaptersPP(FFmpegPostProcessor):
1012     def __init__(self, downloader, force_keyframes=False):
1013         FFmpegPostProcessor.__init__(self, downloader)
1014         self._force_keyframes = force_keyframes
1015
1016     def _prepare_filename(self, number, chapter, info):
1017         info = info.copy()
1018         info.update({
1019             'section_number': number,
1020             'section_title': chapter.get('title'),
1021             'section_start': chapter.get('start_time'),
1022             'section_end': chapter.get('end_time'),
1023         })
1024         return self._downloader.prepare_filename(info, 'chapter')
1025
1026     def _ffmpeg_args_for_chapter(self, number, chapter, info):
1027         destination = self._prepare_filename(number, chapter, info)
1028         if not self._downloader._ensure_dir_exists(encodeFilename(destination)):
1029             return
1030
1031         chapter['filepath'] = destination
1032         self.to_screen('Chapter %03d; Destination: %s' % (number, destination))
1033         return (
1034             destination,
1035             ['-ss', str(chapter['start_time']),
1036              '-t', str(chapter['end_time'] - chapter['start_time'])])
1037
1038     @PostProcessor._restrict_to(images=False)
1039     def run(self, info):
1040         chapters = info.get('chapters') or []
1041         if not chapters:
1042             self.to_screen('Chapter information is unavailable')
1043             return [], info
1044
1045         in_file = info['filepath']
1046         if self._force_keyframes and len(chapters) > 1:
1047             in_file = self.force_keyframes(in_file, (c['start_time'] for c in chapters))
1048         self.to_screen('Splitting video by chapters; %d chapters found' % len(chapters))
1049         for idx, chapter in enumerate(chapters):
1050             destination, opts = self._ffmpeg_args_for_chapter(idx + 1, chapter, info)
1051             self.real_run_ffmpeg([(in_file, opts)], [(destination, self.stream_copy_opts())])
1052         if in_file != info['filepath']:
1053             self._delete_downloaded_files(in_file, msg=None)
1054         return [], info
1055
1056
1057 class FFmpegThumbnailsConvertorPP(FFmpegPostProcessor):
1058     SUPPORTED_EXTS = MEDIA_EXTENSIONS.thumbnails
1059     FORMAT_RE = create_mapping_re(SUPPORTED_EXTS)
1060
1061     def __init__(self, downloader=None, format=None):
1062         super().__init__(downloader)
1063         self.mapping = format
1064
1065     @classmethod
1066     def is_webp(cls, path):
1067         deprecation_warning(f'{cls.__module__}.{cls.__name__}.is_webp is deprecated')
1068         return imghdr.what(path) == 'webp'
1069
1070     def fixup_webp(self, info, idx=-1):
1071         thumbnail_filename = info['thumbnails'][idx]['filepath']
1072         _, thumbnail_ext = os.path.splitext(thumbnail_filename)
1073         if thumbnail_ext:
1074             if thumbnail_ext.lower() != '.webp' and imghdr.what(thumbnail_filename) == 'webp':
1075                 self.to_screen('Correcting thumbnail "%s" extension to webp' % thumbnail_filename)
1076                 webp_filename = replace_extension(thumbnail_filename, 'webp')
1077                 os.replace(thumbnail_filename, webp_filename)
1078                 info['thumbnails'][idx]['filepath'] = webp_filename
1079                 info['__files_to_move'][webp_filename] = replace_extension(
1080                     info['__files_to_move'].pop(thumbnail_filename), 'webp')
1081
1082     @staticmethod
1083     def _options(target_ext):
1084         yield from ('-update', '1')
1085         if target_ext == 'jpg':
1086             yield from ('-bsf:v', 'mjpeg2jpeg')
1087
1088     def convert_thumbnail(self, thumbnail_filename, target_ext):
1089         thumbnail_conv_filename = replace_extension(thumbnail_filename, target_ext)
1090
1091         self.to_screen(f'Converting thumbnail "{thumbnail_filename}" to {target_ext}')
1092         _, source_ext = os.path.splitext(thumbnail_filename)
1093         self.real_run_ffmpeg(
1094             [(thumbnail_filename, [] if source_ext == '.gif' else ['-f', 'image2', '-pattern_type', 'none'])],
1095             [(thumbnail_conv_filename, self._options(target_ext))])
1096         return thumbnail_conv_filename
1097
1098     def run(self, info):
1099         files_to_delete = []
1100         has_thumbnail = False
1101
1102         for idx, thumbnail_dict in enumerate(info.get('thumbnails') or []):
1103             original_thumbnail = thumbnail_dict.get('filepath')
1104             if not original_thumbnail:
1105                 continue
1106             has_thumbnail = True
1107             self.fixup_webp(info, idx)
1108             original_thumbnail = thumbnail_dict['filepath']  # Path can change during fixup
1109             thumbnail_ext = os.path.splitext(original_thumbnail)[1][1:].lower()
1110             if thumbnail_ext == 'jpeg':
1111                 thumbnail_ext = 'jpg'
1112             target_ext, _skip_msg = resolve_mapping(thumbnail_ext, self.mapping)
1113             if _skip_msg:
1114                 self.to_screen(f'Not converting thumbnail "{original_thumbnail}"; {_skip_msg}')
1115                 continue
1116             thumbnail_dict['filepath'] = self.convert_thumbnail(original_thumbnail, target_ext)
1117             files_to_delete.append(original_thumbnail)
1118             info['__files_to_move'][thumbnail_dict['filepath']] = replace_extension(
1119                 info['__files_to_move'][original_thumbnail], target_ext)
1120
1121         if not has_thumbnail:
1122             self.to_screen('There aren\'t any thumbnails to convert')
1123         return files_to_delete, info
1124
1125
1126 class FFmpegConcatPP(FFmpegPostProcessor):
1127     def __init__(self, downloader, only_multi_video=False):
1128         self._only_multi_video = only_multi_video
1129         super().__init__(downloader)
1130
1131     def _get_codecs(self, file):
1132         codecs = traverse_obj(self.get_metadata_object(file), ('streams', ..., 'codec_name'))
1133         self.write_debug(f'Codecs = {", ".join(codecs)}')
1134         return tuple(codecs)
1135
1136     def concat_files(self, in_files, out_file):
1137         if not self._downloader._ensure_dir_exists(out_file):
1138             return
1139         if len(in_files) == 1:
1140             if os.path.realpath(in_files[0]) != os.path.realpath(out_file):
1141                 self.to_screen(f'Moving "{in_files[0]}" to "{out_file}"')
1142             os.replace(in_files[0], out_file)
1143             return []
1144
1145         if len(set(map(self._get_codecs, in_files))) > 1:
1146             raise PostProcessingError(
1147                 'The files have different streams/codecs and cannot be concatenated. '
1148                 'Either select different formats or --recode-video them to a common format')
1149
1150         self.to_screen(f'Concatenating {len(in_files)} files; Destination: {out_file}')
1151         super().concat_files(in_files, out_file)
1152         return in_files
1153
1154     @PostProcessor._restrict_to(images=False, simulated=False)
1155     def run(self, info):
1156         entries = info.get('entries') or []
1157         if not any(entries) or (self._only_multi_video and info['_type'] != 'multi_video'):
1158             return [], info
1159         elif traverse_obj(entries, (..., lambda k, v: k == 'requested_downloads' and len(v) > 1)):
1160             raise PostProcessingError('Concatenation is not supported when downloading multiple separate formats')
1161
1162         in_files = traverse_obj(entries, (..., 'requested_downloads', 0, 'filepath')) or []
1163         if len(in_files) < len(entries):
1164             raise PostProcessingError('Aborting concatenation because some downloads failed')
1165
1166         exts = traverse_obj(entries, (..., 'requested_downloads', 0, 'ext'), (..., 'ext'))
1167         ie_copy = collections.ChainMap({'ext': exts[0] if len(set(exts)) == 1 else 'mkv'},
1168                                        info, self._downloader._playlist_infodict(info))
1169         out_file = self._downloader.prepare_filename(ie_copy, 'pl_video')
1170
1171         files_to_delete = self.concat_files(in_files, out_file)
1172
1173         info['requested_downloads'] = [{
1174             'filepath': out_file,
1175             'ext': ie_copy['ext'],
1176         }]
1177         return files_to_delete, info