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 compat_str
  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 )
  31
  32 EXT_TO_OUT_FORMATS = {
  33     'aac': 'adts',
  34     'flac': 'flac',
  35     'm4a': 'ipod',
  36     'mka': 'matroska',
  37     'mkv': 'matroska',
  38     'mpg': 'mpeg',
  39     'ogv': 'ogg',
  40     'ts': 'mpegts',
  41     'wma': 'asf',
  42     'wmv': 'asf',
  43     'vtt': 'webvtt',
  44 }
  45 ACODECS = {
  46     'mp3': 'libmp3lame',
  47     'aac': 'aac',
  48     'flac': 'flac',
  49     'm4a': 'aac',
  50     'opus': 'libopus',
  51     'vorbis': 'libvorbis',
  52     'wav': None,
  53     'alac': None,
  54 }
  55
  56
  57 class FFmpegPostProcessorError(PostProcessingError):
  58     pass
  59
  60
  61 class FFmpegPostProcessor(PostProcessor):
  62     def __init__(self, downloader=None):
  63         PostProcessor.__init__(self, downloader)
  64         self._determine_executables()
  65
  66     def check_version(self):
  67         if not self.available:
  68             raise FFmpegPostProcessorError('ffmpeg not found. Please install or provide the path using --ffmpeg-location')
  69
  70         required_version = '10-0' if self.basename == 'avconv' else '1.0'
  71         if is_outdated_version(self._versions[self.basename], required_version):
  72             self.report_warning(f'Your copy of {self.basename} is outdated, update {self.basename} '
  73                                 f'to version {required_version} or newer if you encounter any errors')
  74
  75     @staticmethod
  76     def get_versions_and_features(downloader=None):
  77         pp = FFmpegPostProcessor(downloader)
  78         return pp._versions, pp._features
  79
  80     @staticmethod
  81     def get_versions(downloader=None):
  82         return FFmpegPostProcessor.get_versions_and_features(downloader)[0]
  83
  84     _version_cache, _features_cache = {}, {}
  85
  86     def _determine_executables(self):
  87         programs = ['avprobe', 'avconv', 'ffmpeg', 'ffprobe']
  88
  89         def get_ffmpeg_version(path, prog):
  90             if path in self._version_cache:
  91                 self._versions[prog], self._features = self._version_cache[path], self._features_cache.get(path, {})
  92                 return
  93             out = _get_exe_version_output(path, ['-bsfs'], to_screen=self.write_debug)
  94             ver = detect_exe_version(out) if out else False
  95             if ver:
  96                 regexs = [
  97                     r'(?:\d+:)?([0-9.]+)-[0-9]+ubuntu[0-9.]+$',  # Ubuntu, see [1]
  98                     r'n([0-9.]+)$',  # Arch Linux
  99                     # 1. http://www.ducea.com/2006/06/17/ubuntu-package-version-naming-explanation/
 100                 ]
 101                 for regex in regexs:
 102                     mobj = re.match(regex, ver)
 103                     if mobj:
 104                         ver = mobj.group(1)
 105             self._versions[prog] = self._version_cache[path] = ver
 106             if prog != 'ffmpeg' or not out:
 107                 return
 108
 109             mobj = re.search(r'(?m)^\s+libavformat\s+(?:[0-9. ]+)\s+/\s+(?P<runtime>[0-9. ]+)', out)
 110             lavf_runtime_version = mobj.group('runtime').replace(' ', '') if mobj else None
 111             self._features = self._features_cache[path] = {
 112                 'fdk': '--enable-libfdk-aac' in out,
 113                 'setts': 'setts' in out.splitlines(),
 114                 'needs_adtstoasc': is_outdated_version(lavf_runtime_version, '57.56.100', False),
 115             }
 116
 117         self.basename = None
 118         self.probe_basename = None
 119         self._paths = None
 120         self._versions = None
 121         self._features = {}
 122
 123         prefer_ffmpeg = self.get_param('prefer_ffmpeg', True)
 124         location = self.get_param('ffmpeg_location')
 125         if location is None:
 126             self._paths = {p: p for p in programs}
 127         else:
 128             if not os.path.exists(location):
 129                 self.report_warning(
 130                     'ffmpeg-location %s does not exist! '
 131                     'Continuing without ffmpeg.' % (location))
 132                 self._versions = {}
 133                 return
 134             elif os.path.isdir(location):
 135                 dirname, basename = location, None
 136             else:
 137                 basename = os.path.splitext(os.path.basename(location))[0]
 138                 basename = next((p for p in programs if basename.startswith(p)), 'ffmpeg')
 139                 dirname = os.path.dirname(os.path.abspath(location))
 140                 if basename in ('ffmpeg', 'ffprobe'):
 141                     prefer_ffmpeg = True
 142
 143             self._paths = {
 144                 p: os.path.join(dirname, p) for p in programs}
 145             if basename:
 146                 self._paths[basename] = location
 147
 148         self._versions = {}
 149         executables = {'basename': ('ffmpeg', 'avconv'), 'probe_basename': ('ffprobe', 'avprobe')}
 150         if prefer_ffmpeg is False:
 151             executables = {k: v[::-1] for k, v in executables.items()}
 152         for var, prefs in executables.items():
 153             for p in prefs:
 154                 get_ffmpeg_version(self._paths[p], p)
 155                 if self._versions[p]:
 156                     setattr(self, var, p)
 157                     break
 158
 159         if self.basename == 'avconv':
 160             self.deprecation_warning(
 161                 'Support for avconv is deprecated and may be removed in a future version. Use ffmpeg instead')
 162         if self.probe_basename == 'avprobe':
 163             self.deprecation_warning(
 164                 'Support for avprobe is deprecated and may be removed in a future version. Use ffprobe instead')
 165
 166     @property
 167     def available(self):
 168         return self.basename is not None
 169
 170     @property
 171     def executable(self):
 172         return self._paths[self.basename]
 173
 174     @property
 175     def probe_available(self):
 176         return self.probe_basename is not None
 177
 178     @property
 179     def probe_executable(self):
 180         return self._paths[self.probe_basename]
 181
 182     @staticmethod
 183     def stream_copy_opts(copy=True, *, ext=None):
 184         yield from ('-map', '0')
 185         # Don't copy Apple TV chapters track, bin_data
 186         # See https://github.com/yt-dlp/yt-dlp/issues/2, #19042, #19024, https://trac.ffmpeg.org/ticket/6016
 187         yield from ('-dn', '-ignore_unknown')
 188         if copy:
 189             yield from ('-c', 'copy')
 190         # For some reason, '-c copy -map 0' is not enough to copy subtitles
 191         if ext in ('mp4', 'mov'):
 192             yield from ('-c:s', 'mov_text')
 193
 194     def get_audio_codec(self, path):
 195         if not self.probe_available and not self.available:
 196             raise PostProcessingError('ffprobe and ffmpeg not found. Please install or provide the path using --ffmpeg-location')
 197         try:
 198             if self.probe_available:
 199                 cmd = [
 200                     encodeFilename(self.probe_executable, True),
 201                     encodeArgument('-show_streams')]
 202             else:
 203                 cmd = [
 204                     encodeFilename(self.executable, True),
 205                     encodeArgument('-i')]
 206             cmd.append(encodeFilename(self._ffmpeg_filename_argument(path), True))
 207             self.write_debug(f'{self.basename} command line: {shell_quote(cmd)}')
 208             handle = Popen(cmd, stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
 209             stdout_data, stderr_data = handle.communicate_or_kill()
 210             expected_ret = 0 if self.probe_available else 1
 211             if handle.wait() != expected_ret:
 212                 return None
 213         except OSError:
 214             return None
 215         output = (stdout_data if self.probe_available else stderr_data).decode('ascii', 'ignore')
 216         if self.probe_available:
 217             audio_codec = None
 218             for line in output.split('\n'):
 219                 if line.startswith('codec_name='):
 220                     audio_codec = line.split('=')[1].strip()
 221                 elif line.strip() == 'codec_type=audio' and audio_codec is not None:
 222                     return audio_codec
 223         else:
 224             # Stream #FILE_INDEX:STREAM_INDEX[STREAM_ID](LANGUAGE): CODEC_TYPE: CODEC_NAME
 225             mobj = re.search(
 226                 r'Stream\s*#\d+:\d+(?:\[0x[0-9a-f]+\])?(?:\([a-z]{3}\))?:\s*Audio:\s*([0-9a-z]+)',
 227                 output)
 228             if mobj:
 229                 return mobj.group(1)
 230         return None
 231
 232     def get_metadata_object(self, path, opts=[]):
 233         if self.probe_basename != 'ffprobe':
 234             if self.probe_available:
 235                 self.report_warning('Only ffprobe is supported for metadata extraction')
 236             raise PostProcessingError('ffprobe not found. Please install or provide the path using --ffmpeg-location')
 237         self.check_version()
 238
 239         cmd = [
 240             encodeFilename(self.probe_executable, True),
 241             encodeArgument('-hide_banner'),
 242             encodeArgument('-show_format'),
 243             encodeArgument('-show_streams'),
 244             encodeArgument('-print_format'),
 245             encodeArgument('json'),
 246         ]
 247
 248         cmd += opts
 249         cmd.append(encodeFilename(self._ffmpeg_filename_argument(path), True))
 250         self.write_debug('ffprobe command line: %s' % shell_quote(cmd))
 251         p = Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, stdin=subprocess.PIPE)
 252         stdout, stderr = p.communicate()
 253         return json.loads(stdout.decode('utf-8', 'replace'))
 254
 255     def get_stream_number(self, path, keys, value):
 256         streams = self.get_metadata_object(path)['streams']
 257         num = next(
 258             (i for i, stream in enumerate(streams) if traverse_obj(stream, keys, casesense=False) == value),
 259             None)
 260         return num, len(streams)
 261
 262     def _get_real_video_duration(self, filepath, fatal=True):
 263         try:
 264             duration = float_or_none(
 265                 traverse_obj(self.get_metadata_object(filepath), ('format', 'duration')))
 266             if not duration:
 267                 raise PostProcessingError('ffprobe returned empty duration')
 268             return duration
 269         except PostProcessingError as e:
 270             if fatal:
 271                 raise PostProcessingError(f'Unable to determine video duration: {e.msg}')
 272
 273     def _duration_mismatch(self, d1, d2):
 274         if not d1 or not d2:
 275             return None
 276         # The duration is often only known to nearest second. So there can be <1sec disparity natually.
 277         # Further excuse an additional <1sec difference.
 278         return abs(d1 - d2) > 2
 279
 280     def run_ffmpeg_multiple_files(self, input_paths, out_path, opts, **kwargs):
 281         return self.real_run_ffmpeg(
 282             [(path, []) for path in input_paths],
 283             [(out_path, opts)], **kwargs)
 284
 285     def real_run_ffmpeg(self, input_path_opts, output_path_opts, *, expected_retcodes=(0,)):
 286         self.check_version()
 287
 288         oldest_mtime = min(
 289             os.stat(encodeFilename(path)).st_mtime for path, _ in input_path_opts if path)
 290
 291         cmd = [encodeFilename(self.executable, True), encodeArgument('-y')]
 292         # avconv does not have repeat option
 293         if self.basename == 'ffmpeg':
 294             cmd += [encodeArgument('-loglevel'), encodeArgument('repeat+info')]
 295
 296         def make_args(file, args, name, number):
 297             keys = ['_%s%d' % (name, number), '_%s' % name]
 298             if name == 'o':
 299                 args += ['-movflags', '+faststart']
 300                 if number == 1:
 301                     keys.append('')
 302             args += self._configuration_args(self.basename, keys)
 303             if name == 'i':
 304                 args.append('-i')
 305             return (
 306                 [encodeArgument(arg) for arg in args]
 307                 + [encodeFilename(self._ffmpeg_filename_argument(file), True)])
 308
 309         for arg_type, path_opts in (('i', input_path_opts), ('o', output_path_opts)):
 310             cmd += itertools.chain.from_iterable(
 311                 make_args(path, list(opts), arg_type, i + 1)
 312                 for i, (path, opts) in enumerate(path_opts) if path)
 313
 314         self.write_debug('ffmpeg command line: %s' % shell_quote(cmd))
 315         p = Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, stdin=subprocess.PIPE)
 316         stdout, stderr = p.communicate_or_kill()
 317         if p.returncode not in variadic(expected_retcodes):
 318             stderr = stderr.decode('utf-8', 'replace').strip()
 319             self.write_debug(stderr)
 320             raise FFmpegPostProcessorError(stderr.split('\n')[-1])
 321         for out_path, _ in output_path_opts:
 322             if out_path:
 323                 self.try_utime(out_path, oldest_mtime, oldest_mtime)
 324         return stderr.decode('utf-8', 'replace')
 325
 326     def run_ffmpeg(self, path, out_path, opts, **kwargs):
 327         return self.run_ffmpeg_multiple_files([path], out_path, opts, **kwargs)
 328
 329     @staticmethod
 330     def _ffmpeg_filename_argument(fn):
 331         # Always use 'file:' because the filename may contain ':' (ffmpeg
 332         # interprets that as a protocol) or can start with '-' (-- is broken in
 333         # ffmpeg, see https://ffmpeg.org/trac/ffmpeg/ticket/2127 for details)
 334         # Also leave '-' intact in order not to break streaming to stdout.
 335         if fn.startswith(('http://', 'https://')):
 336             return fn
 337         return 'file:' + fn if fn != '-' else fn
 338
 339     @staticmethod
 340     def _quote_for_ffmpeg(string):
 341         # See https://ffmpeg.org/ffmpeg-utils.html#toc-Quoting-and-escaping
 342         # A sequence of '' produces '\'''\'';
 343         # final replace removes the empty '' between \' \'.
 344         string = string.replace("'", r"'\''").replace("'''", "'")
 345         # Handle potential ' at string boundaries.
 346         string = string[1:] if string[0] == "'" else "'" + string
 347         return string[:-1] if string[-1] == "'" else string + "'"
 348
 349     def force_keyframes(self, filename, timestamps):
 350         timestamps = orderedSet(timestamps)
 351         if timestamps[0] == 0:
 352             timestamps = timestamps[1:]
 353         keyframe_file = prepend_extension(filename, 'keyframes.temp')
 354         self.to_screen(f'Re-encoding "{filename}" with appropriate keyframes')
 355         self.run_ffmpeg(filename, keyframe_file, [
 356             *self.stream_copy_opts(False, ext=determine_ext(filename)),
 357             '-force_key_frames', ','.join(f'{t:.6f}' for t in timestamps)])
 358         return keyframe_file
 359
 360     def concat_files(self, in_files, out_file, concat_opts=None):
 361         """
 362         Use concat demuxer to concatenate multiple files having identical streams.
 363
 364         Only inpoint, outpoint, and duration concat options are supported.
 365         See https://ffmpeg.org/ffmpeg-formats.html#concat-1 for details
 366         """
 367         concat_file = f'{out_file}.concat'
 368         self.write_debug(f'Writing concat spec to {concat_file}')
 369         with open(concat_file, 'wt', encoding='utf-8') as f:
 370             f.writelines(self._concat_spec(in_files, concat_opts))
 371
 372         out_flags = list(self.stream_copy_opts(ext=determine_ext(out_file)))
 373
 374         self.real_run_ffmpeg(
 375             [(concat_file, ['-hide_banner', '-nostdin', '-f', 'concat', '-safe', '0'])],
 376             [(out_file, out_flags)])
 377         os.remove(concat_file)
 378
 379     @classmethod
 380     def _concat_spec(cls, in_files, concat_opts=None):
 381         if concat_opts is None:
 382             concat_opts = [{}] * len(in_files)
 383         yield 'ffconcat version 1.0\n'
 384         for file, opts in zip(in_files, concat_opts):
 385             yield f'file {cls._quote_for_ffmpeg(cls._ffmpeg_filename_argument(file))}\n'
 386             # Iterate explicitly to yield the following directives in order, ignoring the rest.
 387             for directive in 'inpoint', 'outpoint', 'duration':
 388                 if directive in opts:
 389                     yield f'{directive} {opts[directive]}\n'
 390
 391
 392 class FFmpegExtractAudioPP(FFmpegPostProcessor):
 393     COMMON_AUDIO_EXTS = ('wav', 'flac', 'm4a', 'aiff', 'mp3', 'ogg', 'mka', 'opus', 'wma')
 394     SUPPORTED_EXTS = ('aac', 'flac', 'mp3', 'm4a', 'opus', 'vorbis', 'wav', 'alac')
 395
 396     def __init__(self, downloader=None, preferredcodec=None, preferredquality=None, nopostoverwrites=False):
 397         FFmpegPostProcessor.__init__(self, downloader)
 398         self._preferredcodec = preferredcodec or 'best'
 399         self._preferredquality = float_or_none(preferredquality)
 400         self._nopostoverwrites = nopostoverwrites
 401
 402     def _quality_args(self, codec):
 403         if self._preferredquality is None:
 404             return []
 405         elif self._preferredquality > 10:
 406             return ['-b:a', f'{self._preferredquality}k']
 407
 408         limits = {
 409             'libmp3lame': (10, 0),
 410             'libvorbis': (0, 10),
 411             # FFmpeg's AAC encoder does not have an upper limit for the value of -q:a.
 412             # Experimentally, with values over 4, bitrate changes were minimal or non-existent
 413             'aac': (0.1, 4),
 414             'libfdk_aac': (1, 5),
 415         }.get(codec)
 416         if not limits:
 417             return []
 418
 419         q = limits[1] + (limits[0] - limits[1]) * (self._preferredquality / 10)
 420         if codec == 'libfdk_aac':
 421             return ['-vbr', f'{int(q)}']
 422         return ['-q:a', f'{q}']
 423
 424     def run_ffmpeg(self, path, out_path, codec, more_opts):
 425         if codec is None:
 426             acodec_opts = []
 427         else:
 428             acodec_opts = ['-acodec', codec]
 429         opts = ['-vn'] + acodec_opts + more_opts
 430         try:
 431             FFmpegPostProcessor.run_ffmpeg(self, path, out_path, opts)
 432         except FFmpegPostProcessorError as err:
 433             raise AudioConversionError(err.msg)
 434
 435     @PostProcessor._restrict_to(images=False)
 436     def run(self, information):
 437         orig_path = path = information['filepath']
 438         orig_ext = information['ext']
 439
 440         if self._preferredcodec == 'best' and orig_ext in self.COMMON_AUDIO_EXTS:
 441             self.to_screen('Skipping audio extraction since the file is already in a common audio format')
 442             return [], information
 443
 444         filecodec = self.get_audio_codec(path)
 445         if filecodec is None:
 446             raise PostProcessingError('WARNING: unable to obtain file audio codec with ffprobe')
 447
 448         more_opts = []
 449         if self._preferredcodec == 'best' or self._preferredcodec == filecodec or (self._preferredcodec == 'm4a' and filecodec == 'aac'):
 450             if filecodec == 'aac' and self._preferredcodec in ['m4a', 'best']:
 451                 # Lossless, but in another container
 452                 acodec = 'copy'
 453                 extension = 'm4a'
 454                 more_opts = ['-bsf:a', 'aac_adtstoasc']
 455             elif filecodec in ['aac', 'flac', 'mp3', 'vorbis', 'opus']:
 456                 # Lossless if possible
 457                 acodec = 'copy'
 458                 extension = filecodec
 459                 if filecodec == 'aac':
 460                     more_opts = ['-f', 'adts']
 461                 if filecodec == 'vorbis':
 462                     extension = 'ogg'
 463             elif filecodec == 'alac':
 464                 acodec = None
 465                 extension = 'm4a'
 466                 more_opts += ['-acodec', 'alac']
 467             else:
 468                 # MP3 otherwise.
 469                 acodec = 'libmp3lame'
 470                 extension = 'mp3'
 471                 more_opts = self._quality_args(acodec)
 472         else:
 473             # We convert the audio (lossy if codec is lossy)
 474             acodec = ACODECS[self._preferredcodec]
 475             if acodec == 'aac' and self._features.get('fdk'):
 476                 acodec = 'libfdk_aac'
 477             extension = self._preferredcodec
 478             more_opts = self._quality_args(acodec)
 479             if self._preferredcodec == 'aac':
 480                 more_opts += ['-f', 'adts']
 481             elif self._preferredcodec == 'm4a':
 482                 more_opts += ['-bsf:a', 'aac_adtstoasc']
 483             elif self._preferredcodec == 'vorbis':
 484                 extension = 'ogg'
 485             elif self._preferredcodec == 'wav':
 486                 extension = 'wav'
 487                 more_opts += ['-f', 'wav']
 488             elif self._preferredcodec == 'alac':
 489                 extension = 'm4a'
 490                 more_opts += ['-acodec', 'alac']
 491
 492         prefix, sep, ext = path.rpartition('.')  # not os.path.splitext, since the latter does not work on unicode in all setups
 493         temp_path = new_path = prefix + sep + extension
 494
 495         if new_path == path:
 496             if acodec == 'copy':
 497                 self.to_screen(f'File is already in target format {self._preferredcodec}, skipping')
 498                 return [], information
 499             orig_path = prepend_extension(path, 'orig')
 500             temp_path = prepend_extension(path, 'temp')
 501         if (self._nopostoverwrites and os.path.exists(encodeFilename(new_path))
 502                 and os.path.exists(encodeFilename(orig_path))):
 503             self.to_screen('Post-process file %s exists, skipping' % new_path)
 504             return [], information
 505
 506         try:
 507             self.to_screen(f'Destination: {new_path}')
 508             self.run_ffmpeg(path, temp_path, acodec, more_opts)
 509         except AudioConversionError as e:
 510             raise PostProcessingError(
 511                 'audio conversion failed: ' + e.msg)
 512         except Exception:
 513             raise PostProcessingError('error running ' + self.basename)
 514
 515         os.replace(path, orig_path)
 516         os.replace(temp_path, new_path)
 517         information['filepath'] = new_path
 518         information['ext'] = extension
 519
 520         # Try to update the date time for extracted audio file.
 521         if information.get('filetime') is not None:
 522             self.try_utime(
 523                 new_path, time.time(), information['filetime'],
 524                 errnote='Cannot update utime of audio file')
 525
 526         return [orig_path], information
 527
 528
 529 class FFmpegVideoConvertorPP(FFmpegPostProcessor):
 530     SUPPORTED_EXTS = ('mp4', 'mkv', 'flv', 'webm', 'mov', 'avi', 'mka', 'ogg', *FFmpegExtractAudioPP.SUPPORTED_EXTS)
 531     FORMAT_RE = re.compile(r'{0}(?:/{0})*$'.format(r'(?:\w+>)?(?:%s)' % '|'.join(SUPPORTED_EXTS)))
 532     _ACTION = 'converting'
 533
 534     def __init__(self, downloader=None, preferedformat=None):
 535         super().__init__(downloader)
 536         self._preferedformats = preferedformat.lower().split('/')
 537
 538     def _target_ext(self, source_ext):
 539         for pair in self._preferedformats:
 540             kv = pair.split('>')
 541             if len(kv) == 1 or kv[0].strip() == source_ext:
 542                 return kv[-1].strip()
 543
 544     @staticmethod
 545     def _options(target_ext):
 546         yield from FFmpegPostProcessor.stream_copy_opts(False)
 547         if target_ext == 'avi':
 548             yield from ('-c:v', 'libxvid', '-vtag', 'XVID')
 549
 550     @PostProcessor._restrict_to(images=False)
 551     def run(self, info):
 552         filename, source_ext = info['filepath'], info['ext'].lower()
 553         target_ext = self._target_ext(source_ext)
 554         _skip_msg = (
 555             f'could not find a mapping for {source_ext}' if not target_ext
 556             else f'already is in target format {source_ext}' if source_ext == target_ext
 557             else None)
 558         if _skip_msg:
 559             self.to_screen(f'Not {self._ACTION} media file "{filename}"; {_skip_msg}')
 560             return [], info
 561
 562         outpath = replace_extension(filename, target_ext, source_ext)
 563         self.to_screen(f'{self._ACTION.title()} video from {source_ext} to {target_ext}; Destination: {outpath}')
 564         self.run_ffmpeg(filename, outpath, self._options(target_ext))
 565
 566         info['filepath'] = outpath
 567         info['format'] = info['ext'] = target_ext
 568         return [filename], info
 569
 570
 571 class FFmpegVideoRemuxerPP(FFmpegVideoConvertorPP):
 572     _ACTION = 'remuxing'
 573
 574     @staticmethod
 575     def _options(target_ext):
 576         return FFmpegPostProcessor.stream_copy_opts()
 577
 578
 579 class FFmpegEmbedSubtitlePP(FFmpegPostProcessor):
 580     SUPPORTED_EXTS = ('mp4', 'mov', 'm4a', 'webm', 'mkv', 'mka')
 581
 582     def __init__(self, downloader=None, already_have_subtitle=False):
 583         super().__init__(downloader)
 584         self._already_have_subtitle = already_have_subtitle
 585
 586     @PostProcessor._restrict_to(images=False)
 587     def run(self, info):
 588         if info['ext'] not in self.SUPPORTED_EXTS:
 589             self.to_screen(f'Subtitles can only be embedded in {", ".join(self.SUPPORTED_EXTS)} files')
 590             return [], info
 591         subtitles = info.get('requested_subtitles')
 592         if not subtitles:
 593             self.to_screen('There aren\'t any subtitles to embed')
 594             return [], info
 595
 596         filename = info['filepath']
 597
 598         # Disabled temporarily. There needs to be a way to overide this
 599         # in case of duration actually mismatching in extractor
 600         # See: https://github.com/yt-dlp/yt-dlp/issues/1870, https://github.com/yt-dlp/yt-dlp/issues/1385
 601         '''
 602         if info.get('duration') and not info.get('__real_download') and self._duration_mismatch(
 603                 self._get_real_video_duration(filename, False), info['duration']):
 604             self.to_screen(f'Skipping {self.pp_key()} since the real and expected durations mismatch')
 605             return [], info
 606         '''
 607
 608         ext = info['ext']
 609         sub_langs, sub_names, sub_filenames = [], [], []
 610         webm_vtt_warn = False
 611         mp4_ass_warn = False
 612
 613         for lang, sub_info in subtitles.items():
 614             if not os.path.exists(sub_info.get('filepath', '')):
 615                 self.report_warning(f'Skipping embedding {lang} subtitle because the file is missing')
 616                 continue
 617             sub_ext = sub_info['ext']
 618             if sub_ext == 'json':
 619                 self.report_warning('JSON subtitles cannot be embedded')
 620             elif ext != 'webm' or ext == 'webm' and sub_ext == 'vtt':
 621                 sub_langs.append(lang)
 622                 sub_names.append(sub_info.get('name'))
 623                 sub_filenames.append(sub_info['filepath'])
 624             else:
 625                 if not webm_vtt_warn and ext == 'webm' and sub_ext != 'vtt':
 626                     webm_vtt_warn = True
 627                     self.report_warning('Only WebVTT subtitles can be embedded in webm files')
 628             if not mp4_ass_warn and ext == 'mp4' and sub_ext == 'ass':
 629                 mp4_ass_warn = True
 630                 self.report_warning('ASS subtitles cannot be properly embedded in mp4 files; expect issues')
 631
 632         if not sub_langs:
 633             return [], info
 634
 635         input_files = [filename] + sub_filenames
 636
 637         opts = [
 638             *self.stream_copy_opts(ext=info['ext']),
 639             # Don't copy the existing subtitles, we may be running the
 640             # postprocessor a second time
 641             '-map', '-0:s',
 642         ]
 643         for i, (lang, name) in enumerate(zip(sub_langs, sub_names)):
 644             opts.extend(['-map', '%d:0' % (i + 1)])
 645             lang_code = ISO639Utils.short2long(lang) or lang
 646             opts.extend(['-metadata:s:s:%d' % i, 'language=%s' % lang_code])
 647             if name:
 648                 opts.extend(['-metadata:s:s:%d' % i, 'handler_name=%s' % name,
 649                              '-metadata:s:s:%d' % i, 'title=%s' % name])
 650
 651         temp_filename = prepend_extension(filename, 'temp')
 652         self.to_screen('Embedding subtitles in "%s"' % filename)
 653         self.run_ffmpeg_multiple_files(input_files, temp_filename, opts)
 654         os.replace(temp_filename, filename)
 655
 656         files_to_delete = [] if self._already_have_subtitle else sub_filenames
 657         return files_to_delete, info
 658
 659
 660 class FFmpegMetadataPP(FFmpegPostProcessor):
 661
 662     def __init__(self, downloader, add_metadata=True, add_chapters=True, add_infojson='if_exists'):
 663         FFmpegPostProcessor.__init__(self, downloader)
 664         self._add_metadata = add_metadata
 665         self._add_chapters = add_chapters
 666         self._add_infojson = add_infojson
 667
 668     @staticmethod
 669     def _options(target_ext):
 670         audio_only = target_ext == 'm4a'
 671         yield from FFmpegPostProcessor.stream_copy_opts(not audio_only)
 672         if audio_only:
 673             yield from ('-vn', '-acodec', 'copy')
 674
 675     @PostProcessor._restrict_to(images=False)
 676     def run(self, info):
 677         filename, metadata_filename = info['filepath'], None
 678         files_to_delete, options = [], []
 679         if self._add_chapters and info.get('chapters'):
 680             metadata_filename = replace_extension(filename, 'meta')
 681             options.extend(self._get_chapter_opts(info['chapters'], metadata_filename))
 682             files_to_delete.append(metadata_filename)
 683         if self._add_metadata:
 684             options.extend(self._get_metadata_opts(info))
 685
 686         if self._add_infojson:
 687             if info['ext'] in ('mkv', 'mka'):
 688                 infojson_filename = info.get('infojson_filename')
 689                 options.extend(self._get_infojson_opts(info, infojson_filename))
 690                 if not infojson_filename:
 691                     files_to_delete.append(info.get('infojson_filename'))
 692             elif self._add_infojson is True:
 693                 self.to_screen('The info-json can only be attached to mkv/mka files')
 694
 695         if not options:
 696             self.to_screen('There isn\'t any metadata to add')
 697             return [], info
 698
 699         temp_filename = prepend_extension(filename, 'temp')
 700         self.to_screen('Adding metadata to "%s"' % filename)
 701         self.run_ffmpeg_multiple_files(
 702             (filename, metadata_filename), temp_filename,
 703             itertools.chain(self._options(info['ext']), *options))
 704         for file in filter(None, files_to_delete):
 705             os.remove(file)  # Don't obey --keep-files
 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 ('-attach', infofn,
 804                '-metadata:s:%d' % new_stream, 'mimetype=application/json')
 805
 806
 807 class FFmpegMergerPP(FFmpegPostProcessor):
 808     @PostProcessor._restrict_to(images=False)
 809     def run(self, info):
 810         filename = info['filepath']
 811         temp_filename = prepend_extension(filename, 'temp')
 812         args = ['-c', 'copy']
 813         audio_streams = 0
 814         for (i, fmt) in enumerate(info['requested_formats']):
 815             if fmt.get('acodec') != 'none':
 816                 args.extend(['-map', f'{i}:a:0'])
 817                 aac_fixup = fmt['protocol'].startswith('m3u8') and self.get_audio_codec(fmt['filepath']) == 'aac'
 818                 if aac_fixup:
 819                     args.extend([f'-bsf:a:{audio_streams}', 'aac_adtstoasc'])
 820                 audio_streams += 1
 821             if fmt.get('vcodec') != 'none':
 822                 args.extend(['-map', '%u:v:0' % (i)])
 823         self.to_screen('Merging formats into "%s"' % filename)
 824         self.run_ffmpeg_multiple_files(info['__files_to_merge'], temp_filename, args)
 825         os.rename(encodeFilename(temp_filename), encodeFilename(filename))
 826         return info['__files_to_merge'], info
 827
 828     def can_merge(self):
 829         # TODO: figure out merge-capable ffmpeg version
 830         if self.basename != 'avconv':
 831             return True
 832
 833         required_version = '10-0'
 834         if is_outdated_version(
 835                 self._versions[self.basename], required_version):
 836             warning = ('Your copy of %s is outdated and unable to properly mux separate video and audio files, '
 837                        'yt-dlp will download single file media. '
 838                        'Update %s to version %s or newer to fix this.') % (
 839                            self.basename, self.basename, required_version)
 840             self.report_warning(warning)
 841             return False
 842         return True
 843
 844
 845 class FFmpegFixupPostProcessor(FFmpegPostProcessor):
 846     def _fixup(self, msg, filename, options):
 847         temp_filename = prepend_extension(filename, 'temp')
 848
 849         self.to_screen(f'{msg} of "{filename}"')
 850         self.run_ffmpeg(filename, temp_filename, options)
 851
 852         os.replace(temp_filename, filename)
 853
 854
 855 class FFmpegFixupStretchedPP(FFmpegFixupPostProcessor):
 856     @PostProcessor._restrict_to(images=False, audio=False)
 857     def run(self, info):
 858         stretched_ratio = info.get('stretched_ratio')
 859         if stretched_ratio not in (None, 1):
 860             self._fixup('Fixing aspect ratio', info['filepath'], [
 861                 *self.stream_copy_opts(), '-aspect', '%f' % stretched_ratio])
 862         return [], info
 863
 864
 865 class FFmpegFixupM4aPP(FFmpegFixupPostProcessor):
 866     @PostProcessor._restrict_to(images=False, video=False)
 867     def run(self, info):
 868         if info.get('container') == 'm4a_dash':
 869             self._fixup('Correcting container', info['filepath'], [*self.stream_copy_opts(), '-f', 'mp4'])
 870         return [], info
 871
 872
 873 class FFmpegFixupM3u8PP(FFmpegFixupPostProcessor):
 874     def _needs_fixup(self, info):
 875         yield info['ext'] in ('mp4', 'm4a')
 876         yield info['protocol'].startswith('m3u8')
 877         try:
 878             metadata = self.get_metadata_object(info['filepath'])
 879         except PostProcessingError as e:
 880             self.report_warning(f'Unable to extract metadata: {e.msg}')
 881             yield True
 882         else:
 883             yield traverse_obj(metadata, ('format', 'format_name'), casesense=False) == 'mpegts'
 884
 885     @PostProcessor._restrict_to(images=False)
 886     def run(self, info):
 887         if all(self._needs_fixup(info)):
 888             self._fixup('Fixing MPEG-TS in MP4 container', info['filepath'], [
 889                 *self.stream_copy_opts(), '-f', 'mp4', '-bsf:a', 'aac_adtstoasc'])
 890         return [], info
 891
 892
 893 class FFmpegFixupTimestampPP(FFmpegFixupPostProcessor):
 894
 895     def __init__(self, downloader=None, trim=0.001):
 896         # "trim" should be used when the video contains unintended packets
 897         super().__init__(downloader)
 898         assert isinstance(trim, (int, float))
 899         self.trim = str(trim)
 900
 901     @PostProcessor._restrict_to(images=False)
 902     def run(self, info):
 903         if not self._features.get('setts'):
 904             self.report_warning(
 905                 'A re-encode is needed to fix timestamps in older versions of ffmpeg. '
 906                 'Please install ffmpeg 4.4 or later to fixup without re-encoding')
 907             opts = ['-vf', 'setpts=PTS-STARTPTS']
 908         else:
 909             opts = ['-c', 'copy', '-bsf', 'setts=ts=TS-STARTPTS']
 910         self._fixup('Fixing frame timestamp', info['filepath'], opts + [*self.stream_copy_opts(False), '-ss', self.trim])
 911         return [], info
 912
 913
 914 class FFmpegCopyStreamPP(FFmpegFixupPostProcessor):
 915     MESSAGE = 'Copying stream'
 916
 917     @PostProcessor._restrict_to(images=False)
 918     def run(self, info):
 919         self._fixup(self.MESSAGE, info['filepath'], self.stream_copy_opts())
 920         return [], info
 921
 922
 923 class FFmpegFixupDurationPP(FFmpegCopyStreamPP):
 924     MESSAGE = 'Fixing video duration'
 925
 926
 927 class FFmpegFixupDuplicateMoovPP(FFmpegCopyStreamPP):
 928     MESSAGE = 'Fixing duplicate MOOV atoms'
 929
 930
 931 class FFmpegSubtitlesConvertorPP(FFmpegPostProcessor):
 932     SUPPORTED_EXTS = ('srt', 'vtt', 'ass', 'lrc')
 933
 934     def __init__(self, downloader=None, format=None):
 935         super().__init__(downloader)
 936         self.format = format
 937
 938     def run(self, info):
 939         subs = info.get('requested_subtitles')
 940         new_ext = self.format
 941         new_format = new_ext
 942         if new_format == 'vtt':
 943             new_format = 'webvtt'
 944         if subs is None:
 945             self.to_screen('There aren\'t any subtitles to convert')
 946             return [], info
 947         self.to_screen('Converting subtitles')
 948         sub_filenames = []
 949         for lang, sub in subs.items():
 950             if not os.path.exists(sub.get('filepath', '')):
 951                 self.report_warning(f'Skipping embedding {lang} subtitle because the file is missing')
 952                 continue
 953             ext = sub['ext']
 954             if ext == new_ext:
 955                 self.to_screen('Subtitle file for %s is already in the requested format' % new_ext)
 956                 continue
 957             elif ext == 'json':
 958                 self.to_screen(
 959                     'You have requested to convert json subtitles into another format, '
 960                     'which is currently not possible')
 961                 continue
 962             old_file = sub['filepath']
 963             sub_filenames.append(old_file)
 964             new_file = replace_extension(old_file, new_ext)
 965
 966             if ext in ('dfxp', 'ttml', 'tt'):
 967                 self.report_warning(
 968                     'You have requested to convert dfxp (TTML) subtitles into another format, '
 969                     'which results in style information loss')
 970
 971                 dfxp_file = old_file
 972                 srt_file = replace_extension(old_file, 'srt')
 973
 974                 with open(dfxp_file, 'rb') as f:
 975                     srt_data = dfxp2srt(f.read())
 976
 977                 with open(srt_file, 'wt', encoding='utf-8') as f:
 978                     f.write(srt_data)
 979                 old_file = srt_file
 980
 981                 subs[lang] = {
 982                     'ext': 'srt',
 983                     'data': srt_data,
 984                     'filepath': srt_file,
 985                 }
 986
 987                 if new_ext == 'srt':
 988                     continue
 989                 else:
 990                     sub_filenames.append(srt_file)
 991
 992             self.run_ffmpeg(old_file, new_file, ['-f', new_format])
 993
 994             with open(new_file, encoding='utf-8') as f:
 995                 subs[lang] = {
 996                     'ext': new_ext,
 997                     'data': f.read(),
 998                     'filepath': new_file,
 999                 }
1000
1001             info['__files_to_move'][new_file] = replace_extension(
1002                 info['__files_to_move'][sub['filepath']], new_ext)
1003
1004         return sub_filenames, info
1005
1006
1007 class FFmpegSplitChaptersPP(FFmpegPostProcessor):
1008     def __init__(self, downloader, force_keyframes=False):
1009         FFmpegPostProcessor.__init__(self, downloader)
1010         self._force_keyframes = force_keyframes
1011
1012     def _prepare_filename(self, number, chapter, info):
1013         info = info.copy()
1014         info.update({
1015             'section_number': number,
1016             'section_title': chapter.get('title'),
1017             'section_start': chapter.get('start_time'),
1018             'section_end': chapter.get('end_time'),
1019         })
1020         return self._downloader.prepare_filename(info, 'chapter')
1021
1022     def _ffmpeg_args_for_chapter(self, number, chapter, info):
1023         destination = self._prepare_filename(number, chapter, info)
1024         if not self._downloader._ensure_dir_exists(encodeFilename(destination)):
1025             return
1026
1027         chapter['filepath'] = destination
1028         self.to_screen('Chapter %03d; Destination: %s' % (number, destination))
1029         return (
1030             destination,
1031             ['-ss', compat_str(chapter['start_time']),
1032              '-t', compat_str(chapter['end_time'] - chapter['start_time'])])
1033
1034     @PostProcessor._restrict_to(images=False)
1035     def run(self, info):
1036         chapters = info.get('chapters') or []
1037         if not chapters:
1038             self.to_screen('Chapter information is unavailable')
1039             return [], info
1040
1041         in_file = info['filepath']
1042         if self._force_keyframes and len(chapters) > 1:
1043             in_file = self.force_keyframes(in_file, (c['start_time'] for c in chapters))
1044         self.to_screen('Splitting video by chapters; %d chapters found' % len(chapters))
1045         for idx, chapter in enumerate(chapters):
1046             destination, opts = self._ffmpeg_args_for_chapter(idx + 1, chapter, info)
1047             self.real_run_ffmpeg([(in_file, opts)], [(destination, self.stream_copy_opts())])
1048         if in_file != info['filepath']:
1049             os.remove(in_file)
1050         return [], info
1051
1052
1053 class FFmpegThumbnailsConvertorPP(FFmpegPostProcessor):
1054     SUPPORTED_EXTS = ('jpg', 'png', 'webp')
1055
1056     def __init__(self, downloader=None, format=None):
1057         super().__init__(downloader)
1058         self.format = format
1059
1060     @staticmethod
1061     def is_webp(path):
1062         with open(encodeFilename(path), 'rb') as f:
1063             b = f.read(12)
1064         return b[0:4] == b'RIFF' and b[8:] == b'WEBP'
1065
1066     def fixup_webp(self, info, idx=-1):
1067         thumbnail_filename = info['thumbnails'][idx]['filepath']
1068         _, thumbnail_ext = os.path.splitext(thumbnail_filename)
1069         if thumbnail_ext:
1070             thumbnail_ext = thumbnail_ext[1:].lower()
1071             if thumbnail_ext != 'webp' and self.is_webp(thumbnail_filename):
1072                 self.to_screen('Correcting thumbnail "%s" extension to webp' % thumbnail_filename)
1073                 webp_filename = replace_extension(thumbnail_filename, 'webp')
1074                 os.replace(thumbnail_filename, webp_filename)
1075                 info['thumbnails'][idx]['filepath'] = webp_filename
1076                 info['__files_to_move'][webp_filename] = replace_extension(
1077                     info['__files_to_move'].pop(thumbnail_filename), 'webp')
1078
1079     @staticmethod
1080     def _options(target_ext):
1081         if target_ext == 'jpg':
1082             return ['-bsf:v', 'mjpeg2jpeg']
1083         return []
1084
1085     def convert_thumbnail(self, thumbnail_filename, target_ext):
1086         thumbnail_conv_filename = replace_extension(thumbnail_filename, target_ext)
1087
1088         self.to_screen(f'Converting thumbnail "{thumbnail_filename}" to {target_ext}')
1089         self.real_run_ffmpeg(
1090             [(thumbnail_filename, ['-f', 'image2', '-pattern_type', 'none'])],
1091             [(thumbnail_conv_filename.replace('%', '%%'), self._options(target_ext))])
1092         return thumbnail_conv_filename
1093
1094     def run(self, info):
1095         files_to_delete = []
1096         has_thumbnail = False
1097
1098         for idx, thumbnail_dict in enumerate(info.get('thumbnails') or []):
1099             original_thumbnail = thumbnail_dict.get('filepath')
1100             if not original_thumbnail:
1101                 continue
1102             has_thumbnail = True
1103             self.fixup_webp(info, idx)
1104             _, thumbnail_ext = os.path.splitext(original_thumbnail)
1105             if thumbnail_ext:
1106                 thumbnail_ext = thumbnail_ext[1:].lower()
1107             if thumbnail_ext == 'jpeg':
1108                 thumbnail_ext = 'jpg'
1109             if thumbnail_ext == self.format:
1110                 self.to_screen('Thumbnail "%s" is already in the requested format' % original_thumbnail)
1111                 continue
1112             thumbnail_dict['filepath'] = self.convert_thumbnail(original_thumbnail, self.format)
1113             files_to_delete.append(original_thumbnail)
1114             info['__files_to_move'][thumbnail_dict['filepath']] = replace_extension(
1115                 info['__files_to_move'][original_thumbnail], self.format)
1116
1117         if not has_thumbnail:
1118             self.to_screen('There aren\'t any thumbnails to convert')
1119         return files_to_delete, info
1120
1121
1122 class FFmpegConcatPP(FFmpegPostProcessor):
1123     def __init__(self, downloader, only_multi_video=False):
1124         self._only_multi_video = only_multi_video
1125         super().__init__(downloader)
1126
1127     def _get_codecs(self, file):
1128         codecs = traverse_obj(self.get_metadata_object(file), ('streams', ..., 'codec_name'))
1129         self.write_debug(f'Codecs = {", ".join(codecs)}')
1130         return tuple(codecs)
1131
1132     def concat_files(self, in_files, out_file):
1133         if not self._downloader._ensure_dir_exists(out_file):
1134             return
1135         if len(in_files) == 1:
1136             if os.path.realpath(in_files[0]) != os.path.realpath(out_file):
1137                 self.to_screen(f'Moving "{in_files[0]}" to "{out_file}"')
1138             os.replace(in_files[0], out_file)
1139             return []
1140
1141         if len(set(map(self._get_codecs, in_files))) > 1:
1142             raise PostProcessingError(
1143                 'The files have different streams/codecs and cannot be concatenated. '
1144                 'Either select different formats or --recode-video them to a common format')
1145
1146         self.to_screen(f'Concatenating {len(in_files)} files; Destination: {out_file}')
1147         super().concat_files(in_files, out_file)
1148         return in_files
1149
1150     @PostProcessor._restrict_to(images=False, simulated=False)
1151     def run(self, info):
1152         entries = info.get('entries') or []
1153         if not any(entries) or (self._only_multi_video and info['_type'] != 'multi_video'):
1154             return [], info
1155         elif traverse_obj(entries, (..., 'requested_downloads', lambda _, v: len(v) > 1)):
1156             raise PostProcessingError('Concatenation is not supported when downloading multiple separate formats')
1157
1158         in_files = traverse_obj(entries, (..., 'requested_downloads', 0, 'filepath')) or []
1159         if len(in_files) < len(entries):
1160             raise PostProcessingError('Aborting concatenation because some downloads failed')
1161
1162         ie_copy = self._downloader._playlist_infodict(info)
1163         exts = traverse_obj(entries, (..., 'requested_downloads', 0, 'ext'), (..., 'ext'))
1164         ie_copy['ext'] = exts[0] if len(set(exts)) == 1 else 'mkv'
1165         out_file = self._downloader.prepare_filename(ie_copy, 'pl_video')
1166
1167         files_to_delete = self.concat_files(in_files, out_file)
1168
1169         info['requested_downloads'] = [{
1170             'filepath': out_file,
1171             'ext': ie_copy['ext'],
1172         }]
1173         return files_to_delete, info