yt_dlp/postprocessor/ffmpeg.py

   1 import collections
   2 import itertools
   3 import json
   4 import os
   5 import re
   6 import subprocess
   7 import time
   8
   9 from .common import AudioConversionError, PostProcessor
  10 from ..compat import imghdr
  11 from ..utils import (
  12     ISO639Utils,
  13     Popen,
  14     PostProcessingError,
  15     _get_exe_version_output,
  16     detect_exe_version,
  17     determine_ext,
  18     dfxp2srt,
  19     encodeArgument,
  20     encodeFilename,
  21     float_or_none,
  22     is_outdated_version,
  23     orderedSet,
  24     prepend_extension,
  25     replace_extension,
  26     shell_quote,
  27     traverse_obj,
  28     variadic,
  29     write_json_file,
  30     write_string,
  31 )
  32
  33 EXT_TO_OUT_FORMATS = {
  34     'aac': 'adts',
  35     'flac': 'flac',
  36     'm4a': 'ipod',
  37     'mka': 'matroska',
  38     'mkv': 'matroska',
  39     'mpg': 'mpeg',
  40     'ogv': 'ogg',
  41     'ts': 'mpegts',
  42     'wma': 'asf',
  43     'wmv': 'asf',
  44     'vtt': 'webvtt',
  45 }
  46 ACODECS = {
  47     'mp3': 'libmp3lame',
  48     'aac': 'aac',
  49     'flac': 'flac',
  50     'm4a': 'aac',
  51     'opus': 'libopus',
  52     'vorbis': 'libvorbis',
  53     'wav': None,
  54     'alac': None,
  55 }
  56
  57
  58 class FFmpegPostProcessorError(PostProcessingError):
  59     pass
  60
  61
  62 class FFmpegPostProcessor(PostProcessor):
  63     def __init__(self, downloader=None):
  64         PostProcessor.__init__(self, downloader)
  65         self._determine_executables()
  66
  67     def check_version(self):
  68         if not self.available:
  69             raise FFmpegPostProcessorError('ffmpeg not found. Please install or provide the path using --ffmpeg-location')
  70
  71         required_version = '10-0' if self.basename == 'avconv' else '1.0'
  72         if is_outdated_version(self._versions[self.basename], required_version):
  73             self.report_warning(f'Your copy of {self.basename} is outdated, update {self.basename} '
  74                                 f'to version {required_version} or newer if you encounter any errors')
  75
  76     @staticmethod
  77     def get_versions_and_features(downloader=None):
  78         pp = FFmpegPostProcessor(downloader)
  79         return pp._versions, pp._features
  80
  81     @staticmethod
  82     def get_versions(downloader=None):
  83         return FFmpegPostProcessor.get_versions_and_features(downloader)[0]
  84
  85     _version_cache, _features_cache = {}, {}
  86
  87     def _determine_executables(self):
  88         programs = ['avprobe', 'avconv', 'ffmpeg', 'ffprobe']
  89
  90         def get_ffmpeg_version(path, prog):
  91             if path in self._version_cache:
  92                 self._versions[prog], self._features = self._version_cache[path], self._features_cache.get(path, {})
  93                 return
  94             out = _get_exe_version_output(path, ['-bsfs'], to_screen=self.write_debug)
  95             ver = detect_exe_version(out) if out else False
  96             if ver:
  97                 regexs = [
  98                     r'(?:\d+:)?([0-9.]+)-[0-9]+ubuntu[0-9.]+$',  # Ubuntu, see [1]
  99                     r'n([0-9.]+)$',  # Arch Linux
 100                     # 1. http://www.ducea.com/2006/06/17/ubuntu-package-version-naming-explanation/
 101                 ]
 102                 for regex in regexs:
 103                     mobj = re.match(regex, ver)
 104                     if mobj:
 105                         ver = mobj.group(1)
 106             self._versions[prog] = self._version_cache[path] = ver
 107             if prog != 'ffmpeg' or not out:
 108                 return
 109
 110             mobj = re.search(r'(?m)^\s+libavformat\s+(?:[0-9. ]+)\s+/\s+(?P<runtime>[0-9. ]+)', out)
 111             lavf_runtime_version = mobj.group('runtime').replace(' ', '') if mobj else None
 112             self._features = self._features_cache[path] = {
 113                 'fdk': '--enable-libfdk-aac' in out,
 114                 'setts': 'setts' in out.splitlines(),
 115                 'needs_adtstoasc': is_outdated_version(lavf_runtime_version, '57.56.100', False),
 116             }
 117
 118         self.basename = None
 119         self.probe_basename = None
 120         self._paths = None
 121         self._versions = None
 122         self._features = {}
 123
 124         prefer_ffmpeg = self.get_param('prefer_ffmpeg', True)
 125         location = self.get_param('ffmpeg_location')
 126         if location is None:
 127             self._paths = {p: p for p in programs}
 128         else:
 129             if not os.path.exists(location):
 130                 self.report_warning(
 131                     'ffmpeg-location %s does not exist! '
 132                     'Continuing without ffmpeg.' % (location))
 133                 self._versions = {}
 134                 return
 135             elif os.path.isdir(location):
 136                 dirname, basename = location, None
 137             else:
 138                 basename = os.path.splitext(os.path.basename(location))[0]
 139                 basename = next((p for p in programs if basename.startswith(p)), 'ffmpeg')
 140                 dirname = os.path.dirname(os.path.abspath(location))
 141                 if basename in ('ffmpeg', 'ffprobe'):
 142                     prefer_ffmpeg = True
 143
 144             self._paths = {
 145                 p: os.path.join(dirname, p) for p in programs}
 146             if basename:
 147                 self._paths[basename] = location
 148
 149         self._versions = {}
 150         # NB: probe must be first for _features to be poulated correctly
 151         executables = {'probe_basename': ('ffprobe', 'avprobe'), 'basename': ('ffmpeg', 'avconv')}
 152         if prefer_ffmpeg is False:
 153             executables = {k: v[::-1] for k, v in executables.items()}
 154         for var, prefs in executables.items():
 155             for p in prefs:
 156                 get_ffmpeg_version(self._paths[p], p)
 157                 if self._versions[p]:
 158                     setattr(self, var, p)
 159                     break
 160
 161         if self.basename == 'avconv':
 162             self.deprecation_warning(
 163                 'Support for avconv is deprecated and may be removed in a future version. Use ffmpeg instead')
 164         if self.probe_basename == 'avprobe':
 165             self.deprecation_warning(
 166                 'Support for avprobe is deprecated and may be removed in a future version. Use ffprobe instead')
 167
 168     @property
 169     def available(self):
 170         return self.basename is not None
 171
 172     @property
 173     def executable(self):
 174         return self._paths[self.basename]
 175
 176     @property
 177     def probe_available(self):
 178         return self.probe_basename is not None
 179
 180     @property
 181     def probe_executable(self):
 182         return self._paths[self.probe_basename]
 183
 184     @staticmethod
 185     def stream_copy_opts(copy=True, *, ext=None):
 186         yield from ('-map', '0')
 187         # Don't copy Apple TV chapters track, bin_data
 188         # See https://github.com/yt-dlp/yt-dlp/issues/2, #19042, #19024, https://trac.ffmpeg.org/ticket/6016
 189         yield from ('-dn', '-ignore_unknown')
 190         if copy:
 191             yield from ('-c', 'copy')
 192         if ext in ('mp4', 'mov', 'm4a'):
 193             yield from ('-c:s', 'mov_text')
 194
 195     def get_audio_codec(self, path):
 196         if not self.probe_available and not self.available:
 197             raise PostProcessingError('ffprobe and ffmpeg not found. Please install or provide the path using --ffmpeg-location')
 198         try:
 199             if self.probe_available:
 200                 cmd = [
 201                     encodeFilename(self.probe_executable, True),
 202                     encodeArgument('-show_streams')]
 203             else:
 204                 cmd = [
 205                     encodeFilename(self.executable, True),
 206                     encodeArgument('-i')]
 207             cmd.append(encodeFilename(self._ffmpeg_filename_argument(path), True))
 208             self.write_debug(f'{self.basename} command line: {shell_quote(cmd)}')
 209             handle = Popen(cmd, stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
 210             stdout_data, stderr_data = handle.communicate_or_kill()
 211             expected_ret = 0 if self.probe_available else 1
 212             if handle.wait() != expected_ret:
 213                 return None
 214         except OSError:
 215             return None
 216         output = (stdout_data if self.probe_available else stderr_data).decode('ascii', 'ignore')
 217         if self.probe_available:
 218             audio_codec = None
 219             for line in output.split('\n'):
 220                 if line.startswith('codec_name='):
 221                     audio_codec = line.split('=')[1].strip()
 222                 elif line.strip() == 'codec_type=audio' and audio_codec is not None:
 223                     return audio_codec
 224         else:
 225             # Stream #FILE_INDEX:STREAM_INDEX[STREAM_ID](LANGUAGE): CODEC_TYPE: CODEC_NAME
 226             mobj = re.search(
 227                 r'Stream\s*#\d+:\d+(?:\[0x[0-9a-f]+\])?(?:\([a-z]{3}\))?:\s*Audio:\s*([0-9a-z]+)',
 228                 output)
 229             if mobj:
 230                 return mobj.group(1)
 231         return None
 232
 233     def get_metadata_object(self, path, opts=[]):
 234         if self.probe_basename != 'ffprobe':
 235             if self.probe_available:
 236                 self.report_warning('Only ffprobe is supported for metadata extraction')
 237             raise PostProcessingError('ffprobe not found. Please install or provide the path using --ffmpeg-location')
 238         self.check_version()
 239
 240         cmd = [
 241             encodeFilename(self.probe_executable, True),
 242             encodeArgument('-hide_banner'),
 243             encodeArgument('-show_format'),
 244             encodeArgument('-show_streams'),
 245             encodeArgument('-print_format'),
 246             encodeArgument('json'),
 247         ]
 248
 249         cmd += opts
 250         cmd.append(encodeFilename(self._ffmpeg_filename_argument(path), True))
 251         self.write_debug('ffprobe command line: %s' % shell_quote(cmd))
 252         p = Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, stdin=subprocess.PIPE)
 253         stdout, stderr = p.communicate()
 254         return json.loads(stdout.decode('utf-8', 'replace'))
 255
 256     def get_stream_number(self, path, keys, value):
 257         streams = self.get_metadata_object(path)['streams']
 258         num = next(
 259             (i for i, stream in enumerate(streams) if traverse_obj(stream, keys, casesense=False) == value),
 260             None)
 261         return num, len(streams)
 262
 263     def _get_real_video_duration(self, filepath, fatal=True):
 264         try:
 265             duration = float_or_none(
 266                 traverse_obj(self.get_metadata_object(filepath), ('format', 'duration')))
 267             if not duration:
 268                 raise PostProcessingError('ffprobe returned empty duration')
 269             return duration
 270         except PostProcessingError as e:
 271             if fatal:
 272                 raise PostProcessingError(f'Unable to determine video duration: {e.msg}')
 273
 274     def _duration_mismatch(self, d1, d2):
 275         if not d1 or not d2:
 276             return None
 277         # The duration is often only known to nearest second. So there can be <1sec disparity natually.
 278         # Further excuse an additional <1sec difference.
 279         return abs(d1 - d2) > 2
 280
 281     def run_ffmpeg_multiple_files(self, input_paths, out_path, opts, **kwargs):
 282         return self.real_run_ffmpeg(
 283             [(path, []) for path in input_paths],
 284             [(out_path, opts)], **kwargs)
 285
 286     def real_run_ffmpeg(self, input_path_opts, output_path_opts, *, expected_retcodes=(0,)):
 287         self.check_version()
 288
 289         oldest_mtime = min(
 290             os.stat(encodeFilename(path)).st_mtime for path, _ in input_path_opts if path)
 291
 292         cmd = [encodeFilename(self.executable, True), encodeArgument('-y')]
 293         # avconv does not have repeat option
 294         if self.basename == 'ffmpeg':
 295             cmd += [encodeArgument('-loglevel'), encodeArgument('repeat+info')]
 296
 297         def make_args(file, args, name, number):
 298             keys = ['_%s%d' % (name, number), '_%s' % name]
 299             if name == 'o':
 300                 args += ['-movflags', '+faststart']
 301                 if number == 1:
 302                     keys.append('')
 303             args += self._configuration_args(self.basename, keys)
 304             if name == 'i':
 305                 args.append('-i')
 306             return (
 307                 [encodeArgument(arg) for arg in args]
 308                 + [encodeFilename(self._ffmpeg_filename_argument(file), True)])
 309
 310         for arg_type, path_opts in (('i', input_path_opts), ('o', output_path_opts)):
 311             cmd += itertools.chain.from_iterable(
 312                 make_args(path, list(opts), arg_type, i + 1)
 313                 for i, (path, opts) in enumerate(path_opts) if path)
 314
 315         self.write_debug('ffmpeg command line: %s' % shell_quote(cmd))
 316         p = Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, stdin=subprocess.PIPE)
 317         stdout, stderr = p.communicate_or_kill()
 318         if p.returncode not in variadic(expected_retcodes):
 319             stderr = stderr.decode('utf-8', 'replace').strip()
 320             self.write_debug(stderr)
 321             raise FFmpegPostProcessorError(stderr.split('\n')[-1])
 322         for out_path, _ in output_path_opts:
 323             if out_path:
 324                 self.try_utime(out_path, oldest_mtime, oldest_mtime)
 325         return stderr.decode('utf-8', 'replace')
 326
 327     def run_ffmpeg(self, path, out_path, opts, **kwargs):
 328         return self.run_ffmpeg_multiple_files([path], out_path, opts, **kwargs)
 329
 330     @staticmethod
 331     def _ffmpeg_filename_argument(fn):
 332         # Always use 'file:' because the filename may contain ':' (ffmpeg
 333         # interprets that as a protocol) or can start with '-' (-- is broken in
 334         # ffmpeg, see https://ffmpeg.org/trac/ffmpeg/ticket/2127 for details)
 335         # Also leave '-' intact in order not to break streaming to stdout.
 336         if fn.startswith(('http://', 'https://')):
 337             return fn
 338         return 'file:' + fn if fn != '-' else fn
 339
 340     @staticmethod
 341     def _quote_for_ffmpeg(string):
 342         # See https://ffmpeg.org/ffmpeg-utils.html#toc-Quoting-and-escaping
 343         # A sequence of '' produces '\'''\'';
 344         # final replace removes the empty '' between \' \'.
 345         string = string.replace("'", r"'\''").replace("'''", "'")
 346         # Handle potential ' at string boundaries.
 347         string = string[1:] if string[0] == "'" else "'" + string
 348         return string[:-1] if string[-1] == "'" else string + "'"
 349
 350     def force_keyframes(self, filename, timestamps):
 351         timestamps = orderedSet(timestamps)
 352         if timestamps[0] == 0:
 353             timestamps = timestamps[1:]
 354         keyframe_file = prepend_extension(filename, 'keyframes.temp')
 355         self.to_screen(f'Re-encoding "{filename}" with appropriate keyframes')
 356         self.run_ffmpeg(filename, keyframe_file, [
 357             *self.stream_copy_opts(False, ext=determine_ext(filename)),
 358             '-force_key_frames', ','.join(f'{t:.6f}' for t in timestamps)])
 359         return keyframe_file
 360
 361     def concat_files(self, in_files, out_file, concat_opts=None):
 362         """
 363         Use concat demuxer to concatenate multiple files having identical streams.
 364
 365         Only inpoint, outpoint, and duration concat options are supported.
 366         See https://ffmpeg.org/ffmpeg-formats.html#concat-1 for details
 367         """
 368         concat_file = f'{out_file}.concat'
 369         self.write_debug(f'Writing concat spec to {concat_file}')
 370         with open(concat_file, 'wt', encoding='utf-8') as f:
 371             f.writelines(self._concat_spec(in_files, concat_opts))
 372
 373         out_flags = list(self.stream_copy_opts(ext=determine_ext(out_file)))
 374
 375         self.real_run_ffmpeg(
 376             [(concat_file, ['-hide_banner', '-nostdin', '-f', 'concat', '-safe', '0'])],
 377             [(out_file, out_flags)])
 378         self._delete_downloaded_files(concat_file)
 379
 380     @classmethod
 381     def _concat_spec(cls, in_files, concat_opts=None):
 382         if concat_opts is None:
 383             concat_opts = [{}] * len(in_files)
 384         yield 'ffconcat version 1.0\n'
 385         for file, opts in zip(in_files, concat_opts):
 386             yield f'file {cls._quote_for_ffmpeg(cls._ffmpeg_filename_argument(file))}\n'
 387             # Iterate explicitly to yield the following directives in order, ignoring the rest.
 388             for directive in 'inpoint', 'outpoint', 'duration':
 389                 if directive in opts:
 390                     yield f'{directive} {opts[directive]}\n'
 391
 392
 393 class FFmpegExtractAudioPP(FFmpegPostProcessor):
 394     COMMON_AUDIO_EXTS = ('wav', 'flac', 'm4a', 'aiff', 'mp3', 'ogg', 'mka', 'opus', 'wma')
 395     SUPPORTED_EXTS = ('aac', 'flac', 'mp3', 'm4a', 'opus', 'vorbis', 'wav', 'alac')
 396
 397     def __init__(self, downloader=None, preferredcodec=None, preferredquality=None, nopostoverwrites=False):
 398         FFmpegPostProcessor.__init__(self, downloader)
 399         self._preferredcodec = preferredcodec or 'best'
 400         self._preferredquality = float_or_none(preferredquality)
 401         self._nopostoverwrites = nopostoverwrites
 402
 403     def _quality_args(self, codec):
 404         if self._preferredquality is None:
 405             return []
 406         elif self._preferredquality > 10:
 407             return ['-b:a', f'{self._preferredquality}k']
 408
 409         limits = {
 410             'libmp3lame': (10, 0),
 411             'libvorbis': (0, 10),
 412             # FFmpeg's AAC encoder does not have an upper limit for the value of -q:a.
 413             # Experimentally, with values over 4, bitrate changes were minimal or non-existent
 414             'aac': (0.1, 4),
 415             'libfdk_aac': (1, 5),
 416         }.get(codec)
 417         if not limits:
 418             return []
 419
 420         q = limits[1] + (limits[0] - limits[1]) * (self._preferredquality / 10)
 421         if codec == 'libfdk_aac':
 422             return ['-vbr', f'{int(q)}']
 423         return ['-q:a', f'{q}']
 424
 425     def run_ffmpeg(self, path, out_path, codec, more_opts):
 426         if codec is None:
 427             acodec_opts = []
 428         else:
 429             acodec_opts = ['-acodec', codec]
 430         opts = ['-vn'] + acodec_opts + more_opts
 431         try:
 432             FFmpegPostProcessor.run_ffmpeg(self, path, out_path, opts)
 433         except FFmpegPostProcessorError as err:
 434             raise AudioConversionError(err.msg)
 435
 436     @PostProcessor._restrict_to(images=False)
 437     def run(self, information):
 438         orig_path = path = information['filepath']
 439         orig_ext = information['ext']
 440
 441         if self._preferredcodec == 'best' and orig_ext in self.COMMON_AUDIO_EXTS:
 442             self.to_screen('Skipping audio extraction since the file is already in a common audio format')
 443             return [], information
 444
 445         filecodec = self.get_audio_codec(path)
 446         if filecodec is None:
 447             raise PostProcessingError('WARNING: unable to obtain file audio codec with ffprobe')
 448
 449         more_opts = []
 450         if self._preferredcodec == 'best' or self._preferredcodec == filecodec or (self._preferredcodec == 'm4a' and filecodec == 'aac'):
 451             if filecodec == 'aac' and self._preferredcodec in ['m4a', 'best']:
 452                 # Lossless, but in another container
 453                 acodec = 'copy'
 454                 extension = 'm4a'
 455                 more_opts = ['-bsf:a', 'aac_adtstoasc']
 456             elif filecodec in ['aac', 'flac', 'mp3', 'vorbis', 'opus']:
 457                 # Lossless if possible
 458                 acodec = 'copy'
 459                 extension = filecodec
 460                 if filecodec == 'aac':
 461                     more_opts = ['-f', 'adts']
 462                 if filecodec == 'vorbis':
 463                     extension = 'ogg'
 464             elif filecodec == 'alac':
 465                 acodec = None
 466                 extension = 'm4a'
 467                 more_opts += ['-acodec', 'alac']
 468             else:
 469                 # MP3 otherwise.
 470                 acodec = 'libmp3lame'
 471                 extension = 'mp3'
 472                 more_opts = self._quality_args(acodec)
 473         else:
 474             # We convert the audio (lossy if codec is lossy)
 475             acodec = ACODECS[self._preferredcodec]
 476             if acodec == 'aac' and self._features.get('fdk'):
 477                 acodec = 'libfdk_aac'
 478             extension = self._preferredcodec
 479             more_opts = self._quality_args(acodec)
 480             if self._preferredcodec == 'aac':
 481                 more_opts += ['-f', 'adts']
 482             elif self._preferredcodec == 'm4a':
 483                 more_opts += ['-bsf:a', 'aac_adtstoasc']
 484             elif self._preferredcodec == 'vorbis':
 485                 extension = 'ogg'
 486             elif self._preferredcodec == 'wav':
 487                 extension = 'wav'
 488                 more_opts += ['-f', 'wav']
 489             elif self._preferredcodec == 'alac':
 490                 extension = 'm4a'
 491                 more_opts += ['-acodec', 'alac']
 492
 493         prefix, sep, ext = path.rpartition('.')  # not os.path.splitext, since the latter does not work on unicode in all setups
 494         temp_path = new_path = prefix + sep + extension
 495
 496         if new_path == path:
 497             if acodec == 'copy':
 498                 self.to_screen(f'File is already in target format {self._preferredcodec}, skipping')
 499                 return [], information
 500             orig_path = prepend_extension(path, 'orig')
 501             temp_path = prepend_extension(path, 'temp')
 502         if (self._nopostoverwrites and os.path.exists(encodeFilename(new_path))
 503                 and os.path.exists(encodeFilename(orig_path))):
 504             self.to_screen('Post-process file %s exists, skipping' % new_path)
 505             return [], information
 506
 507         try:
 508             self.to_screen(f'Destination: {new_path}')
 509             self.run_ffmpeg(path, temp_path, acodec, more_opts)
 510         except AudioConversionError as e:
 511             raise PostProcessingError(
 512                 'audio conversion failed: ' + e.msg)
 513         except Exception:
 514             raise PostProcessingError('error running ' + self.basename)
 515
 516         os.replace(path, orig_path)
 517         os.replace(temp_path, new_path)
 518         information['filepath'] = new_path
 519         information['ext'] = extension
 520
 521         # Try to update the date time for extracted audio file.
 522         if information.get('filetime') is not None:
 523             self.try_utime(
 524                 new_path, time.time(), information['filetime'],
 525                 errnote='Cannot update utime of audio file')
 526
 527         return [orig_path], information
 528
 529
 530 class FFmpegVideoConvertorPP(FFmpegPostProcessor):
 531     SUPPORTED_EXTS = ('mp4', 'mkv', 'flv', 'webm', 'mov', 'avi', 'mka', 'ogg', *FFmpegExtractAudioPP.SUPPORTED_EXTS)
 532     FORMAT_RE = re.compile(r'{0}(?:/{0})*$'.format(r'(?:\w+>)?(?:%s)' % '|'.join(SUPPORTED_EXTS)))
 533     _ACTION = 'converting'
 534
 535     def __init__(self, downloader=None, preferedformat=None):
 536         super().__init__(downloader)
 537         self._preferedformats = preferedformat.lower().split('/')
 538
 539     def _target_ext(self, source_ext):
 540         for pair in self._preferedformats:
 541             kv = pair.split('>')
 542             if len(kv) == 1 or kv[0].strip() == source_ext:
 543                 return kv[-1].strip()
 544
 545     @staticmethod
 546     def _options(target_ext):
 547         yield from FFmpegPostProcessor.stream_copy_opts(False)
 548         if target_ext == 'avi':
 549             yield from ('-c:v', 'libxvid', '-vtag', 'XVID')
 550
 551     @PostProcessor._restrict_to(images=False)
 552     def run(self, info):
 553         filename, source_ext = info['filepath'], info['ext'].lower()
 554         target_ext = self._target_ext(source_ext)
 555         _skip_msg = (
 556             f'could not find a mapping for {source_ext}' if not target_ext
 557             else f'already is in target format {source_ext}' if source_ext == target_ext
 558             else None)
 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 overide 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         # See [1-4] for some info on media metadata/metadata supported
 739         # by ffmpeg.
 740         # 1. https://kdenlive.org/en/project/adding-meta-data-to-mp4-video/
 741         # 2. https://wiki.multimedia.cx/index.php/FFmpeg_Metadata
 742         # 3. https://kodi.wiki/view/Video_file_tagging
 743
 744         add('title', ('track', 'title'))
 745         add('date', 'upload_date')
 746         add(('description', 'synopsis'), 'description')
 747         add(('purl', 'comment'), 'webpage_url')
 748         add('track', 'track_number')
 749         add('artist', ('artist', 'creator', 'uploader', 'uploader_id'))
 750         add('genre')
 751         add('album')
 752         add('album_artist')
 753         add('disc', 'disc_number')
 754         add('show', 'series')
 755         add('season_number')
 756         add('episode_id', ('episode', 'episode_id'))
 757         add('episode_sort', 'episode_number')
 758         if 'embed-metadata' in self.get_param('compat_opts', []):
 759             add('comment', 'description')
 760             metadata['common'].pop('synopsis', None)
 761
 762         meta_regex = rf'{re.escape(meta_prefix)}(?P<i>\d+)?_(?P<key>.+)'
 763         for key, value in info.items():
 764             mobj = re.fullmatch(meta_regex, key)
 765             if value is not None and mobj:
 766                 metadata[mobj.group('i') or 'common'][mobj.group('key')] = value
 767
 768         # Write id3v1 metadata also since Windows Explorer can't handle id3v2 tags
 769         yield ('-write_id3v1', '1')
 770
 771         for name, value in metadata['common'].items():
 772             yield ('-metadata', f'{name}={value}')
 773
 774         stream_idx = 0
 775         for fmt in info.get('requested_formats') or []:
 776             stream_count = 2 if 'none' not in (fmt.get('vcodec'), fmt.get('acodec')) else 1
 777             lang = ISO639Utils.short2long(fmt.get('language') or '') or fmt.get('language')
 778             for i in range(stream_idx, stream_idx + stream_count):
 779                 if lang:
 780                     metadata[str(i)].setdefault('language', lang)
 781                 for name, value in metadata[str(i)].items():
 782                     yield (f'-metadata:s:{i}', f'{name}={value}')
 783             stream_idx += stream_count
 784
 785     def _get_infojson_opts(self, info, infofn):
 786         if not infofn or not os.path.exists(infofn):
 787             if self._add_infojson is not True:
 788                 return
 789             infofn = infofn or '%s.temp' % (
 790                 self._downloader.prepare_filename(info, 'infojson')
 791                 or replace_extension(self._downloader.prepare_filename(info), 'info.json', info['ext']))
 792             if not self._downloader._ensure_dir_exists(infofn):
 793                 return
 794             self.write_debug(f'Writing info-json to: {infofn}')
 795             write_json_file(self._downloader.sanitize_info(info, self.get_param('clean_infojson', True)), infofn)
 796             info['infojson_filename'] = infofn
 797
 798         old_stream, new_stream = self.get_stream_number(info['filepath'], ('tags', 'mimetype'), 'application/json')
 799         if old_stream is not None:
 800             yield ('-map', '-0:%d' % old_stream)
 801             new_stream -= 1
 802
 803         yield (
 804             '-attach', infofn,
 805             f'-metadata:s:{new_stream}', 'mimetype=application/json',
 806             f'-metadata:s:{new_stream}', 'filename=info.json',
 807         )
 808
 809
 810 class FFmpegMergerPP(FFmpegPostProcessor):
 811     @PostProcessor._restrict_to(images=False)
 812     def run(self, info):
 813         filename = info['filepath']
 814         temp_filename = prepend_extension(filename, 'temp')
 815         args = ['-c', 'copy']
 816         audio_streams = 0
 817         for (i, fmt) in enumerate(info['requested_formats']):
 818             if fmt.get('acodec') != 'none':
 819                 args.extend(['-map', f'{i}:a:0'])
 820                 aac_fixup = fmt['protocol'].startswith('m3u8') and self.get_audio_codec(fmt['filepath']) == 'aac'
 821                 if aac_fixup:
 822                     args.extend([f'-bsf:a:{audio_streams}', 'aac_adtstoasc'])
 823                 audio_streams += 1
 824             if fmt.get('vcodec') != 'none':
 825                 args.extend(['-map', '%u:v:0' % (i)])
 826         self.to_screen('Merging formats into "%s"' % filename)
 827         self.run_ffmpeg_multiple_files(info['__files_to_merge'], temp_filename, args)
 828         os.rename(encodeFilename(temp_filename), encodeFilename(filename))
 829         return info['__files_to_merge'], info
 830
 831     def can_merge(self):
 832         # TODO: figure out merge-capable ffmpeg version
 833         if self.basename != 'avconv':
 834             return True
 835
 836         required_version = '10-0'
 837         if is_outdated_version(
 838                 self._versions[self.basename], required_version):
 839             warning = ('Your copy of %s is outdated and unable to properly mux separate video and audio files, '
 840                        'yt-dlp will download single file media. '
 841                        'Update %s to version %s or newer to fix this.') % (
 842                            self.basename, self.basename, required_version)
 843             self.report_warning(warning)
 844             return False
 845         return True
 846
 847
 848 class FFmpegFixupPostProcessor(FFmpegPostProcessor):
 849     def _fixup(self, msg, filename, options):
 850         temp_filename = prepend_extension(filename, 'temp')
 851
 852         self.to_screen(f'{msg} of "{filename}"')
 853         self.run_ffmpeg(filename, temp_filename, options)
 854
 855         os.replace(temp_filename, filename)
 856
 857
 858 class FFmpegFixupStretchedPP(FFmpegFixupPostProcessor):
 859     @PostProcessor._restrict_to(images=False, audio=False)
 860     def run(self, info):
 861         stretched_ratio = info.get('stretched_ratio')
 862         if stretched_ratio not in (None, 1):
 863             self._fixup('Fixing aspect ratio', info['filepath'], [
 864                 *self.stream_copy_opts(), '-aspect', '%f' % stretched_ratio])
 865         return [], info
 866
 867
 868 class FFmpegFixupM4aPP(FFmpegFixupPostProcessor):
 869     @PostProcessor._restrict_to(images=False, video=False)
 870     def run(self, info):
 871         if info.get('container') == 'm4a_dash':
 872             self._fixup('Correcting container', info['filepath'], [*self.stream_copy_opts(), '-f', 'mp4'])
 873         return [], info
 874
 875
 876 class FFmpegFixupM3u8PP(FFmpegFixupPostProcessor):
 877     def _needs_fixup(self, info):
 878         yield info['ext'] in ('mp4', 'm4a')
 879         yield info['protocol'].startswith('m3u8')
 880         try:
 881             metadata = self.get_metadata_object(info['filepath'])
 882         except PostProcessingError as e:
 883             self.report_warning(f'Unable to extract metadata: {e.msg}')
 884             yield True
 885         else:
 886             yield traverse_obj(metadata, ('format', 'format_name'), casesense=False) == 'mpegts'
 887
 888     @PostProcessor._restrict_to(images=False)
 889     def run(self, info):
 890         if all(self._needs_fixup(info)):
 891             self._fixup('Fixing MPEG-TS in MP4 container', info['filepath'], [
 892                 *self.stream_copy_opts(), '-f', 'mp4', '-bsf:a', 'aac_adtstoasc'])
 893         return [], info
 894
 895
 896 class FFmpegFixupTimestampPP(FFmpegFixupPostProcessor):
 897
 898     def __init__(self, downloader=None, trim=0.001):
 899         # "trim" should be used when the video contains unintended packets
 900         super().__init__(downloader)
 901         assert isinstance(trim, (int, float))
 902         self.trim = str(trim)
 903
 904     @PostProcessor._restrict_to(images=False)
 905     def run(self, info):
 906         if not self._features.get('setts'):
 907             self.report_warning(
 908                 'A re-encode is needed to fix timestamps in older versions of ffmpeg. '
 909                 'Please install ffmpeg 4.4 or later to fixup without re-encoding')
 910             opts = ['-vf', 'setpts=PTS-STARTPTS']
 911         else:
 912             opts = ['-c', 'copy', '-bsf', 'setts=ts=TS-STARTPTS']
 913         self._fixup('Fixing frame timestamp', info['filepath'], opts + [*self.stream_copy_opts(False), '-ss', self.trim])
 914         return [], info
 915
 916
 917 class FFmpegCopyStreamPP(FFmpegFixupPostProcessor):
 918     MESSAGE = 'Copying stream'
 919
 920     @PostProcessor._restrict_to(images=False)
 921     def run(self, info):
 922         self._fixup(self.MESSAGE, info['filepath'], self.stream_copy_opts())
 923         return [], info
 924
 925
 926 class FFmpegFixupDurationPP(FFmpegCopyStreamPP):
 927     MESSAGE = 'Fixing video duration'
 928
 929
 930 class FFmpegFixupDuplicateMoovPP(FFmpegCopyStreamPP):
 931     MESSAGE = 'Fixing duplicate MOOV atoms'
 932
 933
 934 class FFmpegSubtitlesConvertorPP(FFmpegPostProcessor):
 935     SUPPORTED_EXTS = ('srt', 'vtt', 'ass', 'lrc')
 936
 937     def __init__(self, downloader=None, format=None):
 938         super().__init__(downloader)
 939         self.format = format
 940
 941     def run(self, info):
 942         subs = info.get('requested_subtitles')
 943         new_ext = self.format
 944         new_format = new_ext
 945         if new_format == 'vtt':
 946             new_format = 'webvtt'
 947         if subs is None:
 948             self.to_screen('There aren\'t any subtitles to convert')
 949             return [], info
 950         self.to_screen('Converting subtitles')
 951         sub_filenames = []
 952         for lang, sub in subs.items():
 953             if not os.path.exists(sub.get('filepath', '')):
 954                 self.report_warning(f'Skipping embedding {lang} subtitle because the file is missing')
 955                 continue
 956             ext = sub['ext']
 957             if ext == new_ext:
 958                 self.to_screen('Subtitle file for %s is already in the requested format' % new_ext)
 959                 continue
 960             elif ext == 'json':
 961                 self.to_screen(
 962                     'You have requested to convert json subtitles into another format, '
 963                     'which is currently not possible')
 964                 continue
 965             old_file = sub['filepath']
 966             sub_filenames.append(old_file)
 967             new_file = replace_extension(old_file, new_ext)
 968
 969             if ext in ('dfxp', 'ttml', 'tt'):
 970                 self.report_warning(
 971                     'You have requested to convert dfxp (TTML) subtitles into another format, '
 972                     'which results in style information loss')
 973
 974                 dfxp_file = old_file
 975                 srt_file = replace_extension(old_file, 'srt')
 976
 977                 with open(dfxp_file, 'rb') as f:
 978                     srt_data = dfxp2srt(f.read())
 979
 980                 with open(srt_file, 'wt', encoding='utf-8') as f:
 981                     f.write(srt_data)
 982                 old_file = srt_file
 983
 984                 subs[lang] = {
 985                     'ext': 'srt',
 986                     'data': srt_data,
 987                     'filepath': srt_file,
 988                 }
 989
 990                 if new_ext == 'srt':
 991                     continue
 992                 else:
 993                     sub_filenames.append(srt_file)
 994
 995             self.run_ffmpeg(old_file, new_file, ['-f', new_format])
 996
 997             with open(new_file, encoding='utf-8') as f:
 998                 subs[lang] = {
 999                     'ext': new_ext,
1000                     'data': f.read(),
1001                     'filepath': new_file,
1002                 }
1003
1004             info['__files_to_move'][new_file] = replace_extension(
1005                 info['__files_to_move'][sub['filepath']], new_ext)
1006
1007         return sub_filenames, info
1008
1009
1010 class FFmpegSplitChaptersPP(FFmpegPostProcessor):
1011     def __init__(self, downloader, force_keyframes=False):
1012         FFmpegPostProcessor.__init__(self, downloader)
1013         self._force_keyframes = force_keyframes
1014
1015     def _prepare_filename(self, number, chapter, info):
1016         info = info.copy()
1017         info.update({
1018             'section_number': number,
1019             'section_title': chapter.get('title'),
1020             'section_start': chapter.get('start_time'),
1021             'section_end': chapter.get('end_time'),
1022         })
1023         return self._downloader.prepare_filename(info, 'chapter')
1024
1025     def _ffmpeg_args_for_chapter(self, number, chapter, info):
1026         destination = self._prepare_filename(number, chapter, info)
1027         if not self._downloader._ensure_dir_exists(encodeFilename(destination)):
1028             return
1029
1030         chapter['filepath'] = destination
1031         self.to_screen('Chapter %03d; Destination: %s' % (number, destination))
1032         return (
1033             destination,
1034             ['-ss', str(chapter['start_time']),
1035              '-t', str(chapter['end_time'] - chapter['start_time'])])
1036
1037     @PostProcessor._restrict_to(images=False)
1038     def run(self, info):
1039         chapters = info.get('chapters') or []
1040         if not chapters:
1041             self.to_screen('Chapter information is unavailable')
1042             return [], info
1043
1044         in_file = info['filepath']
1045         if self._force_keyframes and len(chapters) > 1:
1046             in_file = self.force_keyframes(in_file, (c['start_time'] for c in chapters))
1047         self.to_screen('Splitting video by chapters; %d chapters found' % len(chapters))
1048         for idx, chapter in enumerate(chapters):
1049             destination, opts = self._ffmpeg_args_for_chapter(idx + 1, chapter, info)
1050             self.real_run_ffmpeg([(in_file, opts)], [(destination, self.stream_copy_opts())])
1051         if in_file != info['filepath']:
1052             self._delete_downloaded_files(in_file, msg=None)
1053         return [], info
1054
1055
1056 class FFmpegThumbnailsConvertorPP(FFmpegPostProcessor):
1057     SUPPORTED_EXTS = ('jpg', 'png', 'webp')
1058
1059     def __init__(self, downloader=None, format=None):
1060         super().__init__(downloader)
1061         self.format = format
1062
1063     @classmethod
1064     def is_webp(cls, path):
1065         write_string(f'DeprecationWarning: {cls.__module__}.{cls.__name__}.is_webp is deprecated')
1066         return imghdr.what(path) == 'webp'
1067
1068     def fixup_webp(self, info, idx=-1):
1069         thumbnail_filename = info['thumbnails'][idx]['filepath']
1070         _, thumbnail_ext = os.path.splitext(thumbnail_filename)
1071         if thumbnail_ext:
1072             if thumbnail_ext.lower() != '.webp' and imghdr.what(thumbnail_filename) == 'webp':
1073                 self.to_screen('Correcting thumbnail "%s" extension to webp' % thumbnail_filename)
1074                 webp_filename = replace_extension(thumbnail_filename, 'webp')
1075                 os.replace(thumbnail_filename, webp_filename)
1076                 info['thumbnails'][idx]['filepath'] = webp_filename
1077                 info['__files_to_move'][webp_filename] = replace_extension(
1078                     info['__files_to_move'].pop(thumbnail_filename), 'webp')
1079
1080     @staticmethod
1081     def _options(target_ext):
1082         if target_ext == 'jpg':
1083             return ['-bsf:v', 'mjpeg2jpeg']
1084         return []
1085
1086     def convert_thumbnail(self, thumbnail_filename, target_ext):
1087         thumbnail_conv_filename = replace_extension(thumbnail_filename, target_ext)
1088
1089         self.to_screen(f'Converting thumbnail "{thumbnail_filename}" to {target_ext}')
1090         self.real_run_ffmpeg(
1091             [(thumbnail_filename, ['-f', 'image2', '-pattern_type', 'none'])],
1092             [(thumbnail_conv_filename.replace('%', '%%'), self._options(target_ext))])
1093         return thumbnail_conv_filename
1094
1095     def run(self, info):
1096         files_to_delete = []
1097         has_thumbnail = False
1098
1099         for idx, thumbnail_dict in enumerate(info.get('thumbnails') or []):
1100             original_thumbnail = thumbnail_dict.get('filepath')
1101             if not original_thumbnail:
1102                 continue
1103             has_thumbnail = True
1104             self.fixup_webp(info, idx)
1105             _, thumbnail_ext = os.path.splitext(original_thumbnail)
1106             if thumbnail_ext:
1107                 thumbnail_ext = thumbnail_ext[1:].lower()
1108             if thumbnail_ext == 'jpeg':
1109                 thumbnail_ext = 'jpg'
1110             if thumbnail_ext == self.format:
1111                 self.to_screen('Thumbnail "%s" is already in the requested format' % original_thumbnail)
1112                 continue
1113             thumbnail_dict['filepath'] = self.convert_thumbnail(original_thumbnail, self.format)
1114             files_to_delete.append(original_thumbnail)
1115             info['__files_to_move'][thumbnail_dict['filepath']] = replace_extension(
1116                 info['__files_to_move'][original_thumbnail], self.format)
1117
1118         if not has_thumbnail:
1119             self.to_screen('There aren\'t any thumbnails to convert')
1120         return files_to_delete, info
1121
1122
1123 class FFmpegConcatPP(FFmpegPostProcessor):
1124     def __init__(self, downloader, only_multi_video=False):
1125         self._only_multi_video = only_multi_video
1126         super().__init__(downloader)
1127
1128     def _get_codecs(self, file):
1129         codecs = traverse_obj(self.get_metadata_object(file), ('streams', ..., 'codec_name'))
1130         self.write_debug(f'Codecs = {", ".join(codecs)}')
1131         return tuple(codecs)
1132
1133     def concat_files(self, in_files, out_file):
1134         if not self._downloader._ensure_dir_exists(out_file):
1135             return
1136         if len(in_files) == 1:
1137             if os.path.realpath(in_files[0]) != os.path.realpath(out_file):
1138                 self.to_screen(f'Moving "{in_files[0]}" to "{out_file}"')
1139             os.replace(in_files[0], out_file)
1140             return []
1141
1142         if len(set(map(self._get_codecs, in_files))) > 1:
1143             raise PostProcessingError(
1144                 'The files have different streams/codecs and cannot be concatenated. '
1145                 'Either select different formats or --recode-video them to a common format')
1146
1147         self.to_screen(f'Concatenating {len(in_files)} files; Destination: {out_file}')
1148         super().concat_files(in_files, out_file)
1149         return in_files
1150
1151     @PostProcessor._restrict_to(images=False, simulated=False)
1152     def run(self, info):
1153         entries = info.get('entries') or []
1154         if not any(entries) or (self._only_multi_video and info['_type'] != 'multi_video'):
1155             return [], info
1156         elif traverse_obj(entries, (..., lambda k, v: k == 'requested_downloads' and len(v) > 1)):
1157             raise PostProcessingError('Concatenation is not supported when downloading multiple separate formats')
1158
1159         in_files = traverse_obj(entries, (..., 'requested_downloads', 0, 'filepath')) or []
1160         if len(in_files) < len(entries):
1161             raise PostProcessingError('Aborting concatenation because some downloads failed')
1162
1163         ie_copy = self._downloader._playlist_infodict(info)
1164         exts = traverse_obj(entries, (..., 'requested_downloads', 0, 'ext'), (..., 'ext'))
1165         ie_copy['ext'] = exts[0] if len(set(exts)) == 1 else 'mkv'
1166         out_file = self._downloader.prepare_filename(ie_copy, 'pl_video')
1167
1168         files_to_delete = self.concat_files(in_files, out_file)
1169
1170         info['requested_downloads'] = [{
1171             'filepath': out_file,
1172             'ext': ie_copy['ext'],
1173         }]
1174         return files_to_delete, info