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[mirror] Download/Watch videos from video hostersgit clone https://hacktivis.me/git/mirror/youtube-dl.git

ffmpeg.py (26025B)

    

  1. from __future__ import unicode_literals
  3. import os
  4. import subprocess
  5. import time
  6. import re
  9. from .common import AudioConversionError, PostProcessor
  11. from ..compat import compat_open as open
  12. from ..utils import (
  13.     encodeArgument,
  14.     encodeFilename,
  15.     get_exe_version,
  16.     is_outdated_version,
  17.     PostProcessingError,
  18.     prepend_extension,
  19.     process_communicate_or_kill,
  20.     shell_quote,
  21.     subtitles_filename,
  22.     dfxp2srt,
  23.     ISO639Utils,
  24.     replace_extension,
  25. )
  28. EXT_TO_OUT_FORMATS = {
  29.     'aac': 'adts',
  30.     'flac': 'flac',
  31.     'm4a': 'ipod',
  32.     'mka': 'matroska',
  33.     'mkv': 'matroska',
  34.     'mpg': 'mpeg',
  35.     'ogv': 'ogg',
  36.     'ts': 'mpegts',
  37.     'wma': 'asf',
  38.     'wmv': 'asf',
  39. }
  40. ACODECS = {
  41.     'mp3': 'libmp3lame',
  42.     'aac': 'aac',
  43.     'flac': 'flac',
  44.     'm4a': 'aac',
  45.     'opus': 'libopus',
  46.     'vorbis': 'libvorbis',
  47.     'wav': None,
  48. }
  51. class FFmpegPostProcessorError(PostProcessingError):
  52.     pass
  55. class FFmpegPostProcessor(PostProcessor):
  56.     def __init__(self, downloader=None):
  57.         PostProcessor.__init__(self, downloader)
  58.         self._determine_executables()
  60.     def check_version(self):
  61.         if not self.available:
  62.             raise FFmpegPostProcessorError('ffmpeg or avconv not found. Please install one.')
  64.         required_version = '10-0' if self.basename == 'avconv' else '1.0'
  65.         if is_outdated_version(
  66.                 self._versions[self.basename], required_version):
  67.             warning = 'Your copy of %s is outdated, update %s to version %s or newer if you encounter any errors.' % (
  68.                 self.basename, self.basename, required_version)
  69.             if self._downloader:
  70.                 self._downloader.report_warning(warning)
  72.     @staticmethod
  73.     def get_versions(downloader=None):
  74.         return FFmpegPostProcessor(downloader)._versions
  76.     def _determine_executables(self):
  77.         # ordered to match prefer_ffmpeg!
  78.         convs = ['ffmpeg', 'avconv']
  79.         probes = ['ffprobe', 'avprobe']
  80.         prefer_ffmpeg = True
  81.         programs = convs + probes
  83.         def get_ffmpeg_version(path):
  84.             ver = get_exe_version(path, args=['-version'])
  85.             if ver:
  86.                 regexs = [
  87.                     r'(?:\d+:)?([0-9.]+)-[0-9]+ubuntu[0-9.]+$',  # Ubuntu, see [1]
  88.                     r'n([0-9.]+)$',  # Arch Linux
  89.                     # 1. http://www.ducea.com/2006/06/17/ubuntu-package-version-naming-explanation/
  90.                 ]
  91.                 for regex in regexs:
  92.                     mobj = re.match(regex, ver)
  93.                     if mobj:
  94.                         ver = mobj.group(1)
  95.             return ver
  97.         self.basename = None
  98.         self.probe_basename = None
  100.         self._paths = None
  101.         self._versions = None
  102.         location = None
  103.         if self._downloader:
  104.             prefer_ffmpeg = self._downloader.params.get('prefer_ffmpeg', True)
  105.             location = self._downloader.params.get('ffmpeg_location')
  106.             if location is not None:
  107.                 if not os.path.exists(location):
  108.                     self._downloader.report_warning(
  109.                         'ffmpeg-location %s does not exist! '
  110.                         'Continuing without avconv/ffmpeg.' % (location))
  111.                     self._versions = {}
  112.                     return
  113.                 elif not os.path.isdir(location):
  114.                     basename = os.path.splitext(os.path.basename(location))[0]
  115.                     if basename not in programs:
  116.                         self._downloader.report_warning(
  117.                             'Cannot identify executable %s, its basename should be one of %s. '
  118.                             'Continuing without avconv/ffmpeg.' %
  119.                             (location, ', '.join(programs)))
  120.                         self._versions = {}
  121.                         return None
  122.                     location = os.path.dirname(os.path.abspath(location))
  123.                     if basename in ('ffmpeg', 'ffprobe'):
  124.                         prefer_ffmpeg = True
  125.         self._paths = dict(
  126.             (p, p if location is None else os.path.join(location, p))
  127.             for p in programs)
  128.         self._versions = dict(
  129.             x for x in (
  130.                 (p, get_ffmpeg_version(self._paths[p])) for p in programs)
  131.             if x[1] is not None)
  133.         basenames = [None, None]
  134.         for i, progs in enumerate((convs, probes)):
  135.             for p in progs[::-1 if prefer_ffmpeg is False else 1]:
  136.                 if self._versions.get(p):
  137.                     basenames[i] = p
  138.                     break
  139.         self.basename, self.probe_basename = basenames
  141.     @property
  142.     def available(self):
  143.         return self.basename is not None
  145.     @property
  146.     def executable(self):
  147.         return self._paths[self.basename]
  149.     @property
  150.     def probe_available(self):
  151.         return self.probe_basename is not None
  153.     @property
  154.     def probe_executable(self):
  155.         return self._paths[self.probe_basename]
  157.     def get_audio_codec(self, path):
  158.         if not self.probe_available and not self.available:
  159.             raise PostProcessingError('ffprobe/avprobe and ffmpeg/avconv not found. Please install one.')
  160.         try:
  161.             if self.probe_available:
  162.                 cmd = [
  163.                     encodeFilename(self.probe_executable, True),
  164.                     encodeArgument('-show_streams')]
  165.             else:
  166.                 cmd = [
  167.                     encodeFilename(self.executable, True),
  168.                     encodeArgument('-i')]
  169.             cmd.append(encodeFilename(self._ffmpeg_filename_argument(path), True))
  170.             if self._downloader.params.get('verbose', False):
  171.                 self._downloader.to_screen(
  172.                     '[debug] %s command line: %s' % (self.basename, shell_quote(cmd)))
  173.             handle = subprocess.Popen(
  174.                 cmd, stderr=subprocess.PIPE,
  175.                 stdout=subprocess.PIPE, stdin=subprocess.PIPE)
  176.             stdout_data, stderr_data = process_communicate_or_kill(handle)
  177.             expected_ret = 0 if self.probe_available else 1
  178.             if handle.wait() != expected_ret:
  179.                 return None
  180.         except (IOError, OSError):
  181.             return None
  182.         output = (stdout_data if self.probe_available else stderr_data).decode('ascii', 'ignore')
  183.         if self.probe_available:
  184.             audio_codec = None
  185.             for line in output.split('\n'):
  186.                 if line.startswith('codec_name='):
  187.                     audio_codec = line.split('=')[1].strip()
  188.                 elif line.strip() == 'codec_type=audio' and audio_codec is not None:
  189.                     return audio_codec
  190.         else:
  191.             # Stream #FILE_INDEX:STREAM_INDEX[STREAM_ID](LANGUAGE): CODEC_TYPE: CODEC_NAME
  192.             mobj = re.search(
  193.                 r'Stream\s*#\d+:\d+(?:\[0x[0-9a-f]+\])?(?:\([a-z]{3}\))?:\s*Audio:\s*([0-9a-z]+)',
  194.                 output)
  195.             if mobj:
  196.                 return mobj.group(1)
  197.         return None
  199.     def run_ffmpeg_multiple_files(self, input_paths, out_path, opts):
  200.         self.check_version()
  202.         oldest_mtime = min(
  203.             os.stat(encodeFilename(path)).st_mtime for path in input_paths)
  205.         opts += self._configuration_args()
  207.         files_cmd = []
  208.         for path in input_paths:
  209.             files_cmd.extend([
  210.                 encodeArgument('-i'),
  211.                 encodeFilename(self._ffmpeg_filename_argument(path), True)
  212.             ])
  213.         cmd = [encodeFilename(self.executable, True), encodeArgument('-y')]
  214.         # avconv does not have repeat option
  215.         if self.basename == 'ffmpeg':
  216.             cmd += [encodeArgument('-loglevel'), encodeArgument('repeat+info')]
  217.         cmd += (files_cmd
  218.                 + [encodeArgument(o) for o in opts]
  219.                 + [encodeFilename(self._ffmpeg_filename_argument(out_path), True)])
  221.         if self._downloader.params.get('verbose', False):
  222.             self._downloader.to_screen('[debug] ffmpeg command line: %s' % shell_quote(cmd))
  223.         p = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, stdin=subprocess.PIPE)
  224.         stdout, stderr = process_communicate_or_kill(p)
  225.         if p.returncode != 0:
  226.             stderr = stderr.decode('utf-8', 'replace')
  227.             msgs = stderr.strip().split('\n')
  228.             msg = msgs[-1]
  229.             if self._downloader.params.get('verbose', False):
  230.                 self._downloader.to_screen('[debug] ' + '\n'.join(msgs[:-1]))
  231.             raise FFmpegPostProcessorError(msg)
  232.         self.try_utime(out_path, oldest_mtime, oldest_mtime)
  234.     def run_ffmpeg(self, path, out_path, opts):
  235.         self.run_ffmpeg_multiple_files([path], out_path, opts)
  237.     def _ffmpeg_filename_argument(self, fn):
  238.         # Always use 'file:' because the filename may contain ':' (ffmpeg
  239.         # interprets that as a protocol) or can start with '-' (-- is broken in
  240.         # ffmpeg, see https://ffmpeg.org/trac/ffmpeg/ticket/2127 for details)
  241.         # Also leave '-' intact in order not to break streaming to stdout.
  242.         return 'file:' + fn if fn != '-' else fn
  245. class FFmpegExtractAudioPP(FFmpegPostProcessor):
  246.     def __init__(self, downloader=None, preferredcodec=None, preferredquality=None, nopostoverwrites=False):
  247.         FFmpegPostProcessor.__init__(self, downloader)
  248.         if preferredcodec is None:
  249.             preferredcodec = 'best'
  250.         self._preferredcodec = preferredcodec
  251.         self._preferredquality = preferredquality
  252.         self._nopostoverwrites = nopostoverwrites
  254.     def run_ffmpeg(self, path, out_path, codec, more_opts):
  255.         if codec is None:
  256.             acodec_opts = []
  257.         else:
  258.             acodec_opts = ['-acodec', codec]
  259.         opts = ['-vn'] + acodec_opts + more_opts
  260.         try:
  261.             FFmpegPostProcessor.run_ffmpeg(self, path, out_path, opts)
  262.         except FFmpegPostProcessorError as err:
  263.             raise AudioConversionError(err.msg)
  265.     def run(self, information):
  266.         path = information['filepath']
  268.         filecodec = self.get_audio_codec(path)
  269.         if filecodec is None:
  270.             raise PostProcessingError('WARNING: unable to obtain file audio codec with ffprobe')
  272.         more_opts = []
  273.         if self._preferredcodec == 'best' or self._preferredcodec == filecodec or (self._preferredcodec == 'm4a' and filecodec == 'aac'):
  274.             if filecodec == 'aac' and self._preferredcodec in ['m4a', 'best']:
  275.                 # Lossless, but in another container
  276.                 acodec = 'copy'
  277.                 extension = 'm4a'
  278.                 more_opts = ['-bsf:a', 'aac_adtstoasc']
  279.             elif filecodec in ['aac', 'flac', 'mp3', 'vorbis', 'opus']:
  280.                 # Lossless if possible
  281.                 acodec = 'copy'
  282.                 extension = filecodec
  283.                 if filecodec == 'aac':
  284.                     more_opts = ['-f', 'adts']
  285.                 if filecodec == 'vorbis':
  286.                     extension = 'ogg'
  287.             else:
  288.                 # MP3 otherwise.
  289.                 acodec = 'libmp3lame'
  290.                 extension = 'mp3'
  291.                 more_opts = []
  292.                 if self._preferredquality is not None:
  293.                     if int(self._preferredquality) < 10:
  294.                         more_opts += ['-q:a', self._preferredquality]
  295.                     else:
  296.                         more_opts += ['-b:a', self._preferredquality + 'k']
  297.         else:
  298.             # We convert the audio (lossy if codec is lossy)
  299.             acodec = ACODECS[self._preferredcodec]
  300.             extension = self._preferredcodec
  301.             more_opts = []
  302.             if self._preferredquality is not None:
  303.                 # The opus codec doesn't support the -aq option
  304.                 if int(self._preferredquality) < 10 and extension != 'opus':
  305.                     more_opts += ['-q:a', self._preferredquality]
  306.                 else:
  307.                     more_opts += ['-b:a', self._preferredquality + 'k']
  308.             if self._preferredcodec == 'aac':
  309.                 more_opts += ['-f', 'adts']
  310.             if self._preferredcodec == 'm4a':
  311.                 more_opts += ['-bsf:a', 'aac_adtstoasc']
  312.             if self._preferredcodec == 'vorbis':
  313.                 extension = 'ogg'
  314.             if self._preferredcodec == 'wav':
  315.                 extension = 'wav'
  316.                 more_opts += ['-f', 'wav']
  318.         prefix, sep, ext = path.rpartition('.')  # not os.path.splitext, since the latter does not work on unicode in all setups
  319.         new_path = prefix + sep + extension
  321.         information['filepath'] = new_path
  322.         information['ext'] = extension
  324.         # If we download foo.mp3 and convert it to... foo.mp3, then don't delete foo.mp3, silly.
  325.         if (new_path == path
  326.                 or (self._nopostoverwrites and os.path.exists(encodeFilename(new_path)))):
  327.             self._downloader.to_screen('[ffmpeg] Post-process file %s exists, skipping' % new_path)
  328.             return [], information
  330.         try:
  331.             self._downloader.to_screen('[ffmpeg] Destination: ' + new_path)
  332.             self.run_ffmpeg(path, new_path, acodec, more_opts)
  333.         except AudioConversionError as e:
  334.             raise PostProcessingError(
  335.                 'audio conversion failed: ' + e.msg)
  336.         except Exception:
  337.             raise PostProcessingError('error running ' + self.basename)
  339.         # Try to update the date time for extracted audio file.
  340.         if information.get('filetime') is not None:
  341.             self.try_utime(
  342.                 new_path, time.time(), information['filetime'],
  343.                 errnote='Cannot update utime of audio file')
  345.         return [path], information
  348. class FFmpegVideoConvertorPP(FFmpegPostProcessor):
  349.     def __init__(self, downloader=None, preferedformat=None):
  350.         super(FFmpegVideoConvertorPP, self).__init__(downloader)
  351.         self._preferedformat = preferedformat
  353.     def run(self, information):
  354.         path = information['filepath']
  355.         if information['ext'] == self._preferedformat:
  356.             self._downloader.to_screen('[ffmpeg] Not converting video file %s - already is in target format %s' % (path, self._preferedformat))
  357.             return [], information
  358.         options = []
  359.         if self._preferedformat == 'avi':
  360.             options.extend(['-c:v', 'libxvid', '-vtag', 'XVID'])
  361.         prefix, sep, ext = path.rpartition('.')
  362.         outpath = prefix + sep + self._preferedformat
  363.         self._downloader.to_screen('[' + 'ffmpeg' + '] Converting video from %s to %s, Destination: ' % (information['ext'], self._preferedformat) + outpath)
  364.         self.run_ffmpeg(path, outpath, options)
  365.         information['filepath'] = outpath
  366.         information['format'] = self._preferedformat
  367.         information['ext'] = self._preferedformat
  368.         return [path], information
  371. class FFmpegEmbedSubtitlePP(FFmpegPostProcessor):
  372.     def run(self, information):
  373.         if information['ext'] not in ('mp4', 'webm', 'mkv'):
  374.             self._downloader.to_screen('[ffmpeg] Subtitles can only be embedded in mp4, webm or mkv files')
  375.             return [], information
  376.         subtitles = information.get('requested_subtitles')
  377.         if not subtitles:
  378.             self._downloader.to_screen('[ffmpeg] There aren\'t any subtitles to embed')
  379.             return [], information
  381.         filename = information['filepath']
  383.         ext = information['ext']
  384.         sub_langs = []
  385.         sub_filenames = []
  386.         webm_vtt_warn = False
  388.         for lang, sub_info in subtitles.items():
  389.             sub_ext = sub_info['ext']
  390.             if ext != 'webm' or ext == 'webm' and sub_ext == 'vtt':
  391.                 sub_langs.append(lang)
  392.                 sub_filenames.append(subtitles_filename(filename, lang, sub_ext, ext))
  393.             else:
  394.                 if not webm_vtt_warn and ext == 'webm' and sub_ext != 'vtt':
  395.                     webm_vtt_warn = True
  396.                     self._downloader.to_screen('[ffmpeg] Only WebVTT subtitles can be embedded in webm files')
  398.         if not sub_langs:
  399.             return [], information
  401.         input_files = [filename] + sub_filenames
  403.         opts = [
  404.             '-map', '0',
  405.             '-c', 'copy',
  406.             # Don't copy the existing subtitles, we may be running the
  407.             # postprocessor a second time
  408.             '-map', '-0:s',
  409.             # Don't copy Apple TV chapters track, bin_data (see #19042, #19024,
  410.             # https://trac.ffmpeg.org/ticket/6016)
  411.             '-map', '-0:d',
  412.         ]
  413.         if information['ext'] == 'mp4':
  414.             opts += ['-c:s', 'mov_text']
  415.         for (i, lang) in enumerate(sub_langs):
  416.             opts.extend(['-map', '%d:0' % (i + 1)])
  417.             lang_code = ISO639Utils.short2long(lang) or lang
  418.             opts.extend(['-metadata:s:s:%d' % i, 'language=%s' % lang_code])
  420.         temp_filename = prepend_extension(filename, 'temp')
  421.         self._downloader.to_screen('[ffmpeg] Embedding subtitles in \'%s\'' % filename)
  422.         self.run_ffmpeg_multiple_files(input_files, temp_filename, opts)
  423.         os.remove(encodeFilename(filename))
  424.         os.rename(encodeFilename(temp_filename), encodeFilename(filename))
  426.         return sub_filenames, information
  429. class FFmpegMetadataPP(FFmpegPostProcessor):
  430.     def run(self, info):
  431.         metadata = {}
  433.         def add(meta_list, info_list=None):
  434.             if not info_list:
  435.                 info_list = meta_list
  436.             if not isinstance(meta_list, (list, tuple)):
  437.                 meta_list = (meta_list,)
  438.             if not isinstance(info_list, (list, tuple)):
  439.                 info_list = (info_list,)
  440.             for info_f in info_list:
  441.                 if info.get(info_f) is not None:
  442.                     for meta_f in meta_list:
  443.                         metadata[meta_f] = info[info_f]
  444.                     break
  446.         # See [1-4] for some info on media metadata/metadata supported
  447.         # by ffmpeg.
  448.         # 1. https://kdenlive.org/en/project/adding-meta-data-to-mp4-video/
  449.         # 2. https://wiki.multimedia.cx/index.php/FFmpeg_Metadata
  450.         # 3. https://kodi.wiki/view/Video_file_tagging
  451.         # 4. http://atomicparsley.sourceforge.net/mpeg-4files.html
  453.         add('title', ('track', 'title'))
  454.         add('date', 'upload_date')
  455.         add(('description', 'comment'), 'description')
  456.         add('purl', 'webpage_url')
  457.         add('track', 'track_number')
  458.         add('artist', ('artist', 'creator', 'uploader', 'uploader_id'))
  459.         add('genre')
  460.         add('album')
  461.         add('album_artist')
  462.         add('disc', 'disc_number')
  463.         add('show', 'series')
  464.         add('season_number')
  465.         add('episode_id', ('episode', 'episode_id'))
  466.         add('episode_sort', 'episode_number')
  468.         if not metadata:
  469.             self._downloader.to_screen('[ffmpeg] There isn\'t any metadata to add')
  470.             return [], info
  472.         filename = info['filepath']
  473.         temp_filename = prepend_extension(filename, 'temp')
  474.         in_filenames = [filename]
  475.         options = []
  477.         if info['ext'] == 'm4a':
  478.             options.extend(['-vn', '-acodec', 'copy'])
  479.         else:
  480.             options.extend(['-c', 'copy'])
  482.         for (name, value) in metadata.items():
  483.             options.extend(['-metadata', '%s=%s' % (name, value)])
  485.         chapters = info.get('chapters', [])
  486.         if chapters:
  487.             metadata_filename = replace_extension(filename, 'meta')
  488.             with open(metadata_filename, 'w', encoding='utf-8') as f:
  489.                 def ffmpeg_escape(text):
  490.                     return re.sub(r'(=|;|#|\\|\n)', r'\\\1', text)
  492.                 metadata_file_content = ';FFMETADATA1\n'
  493.                 for chapter in chapters:
  494.                     metadata_file_content += '[CHAPTER]\nTIMEBASE=1/1000\n'
  495.                     metadata_file_content += 'START=%d\n' % (chapter['start_time'] * 1000)
  496.                     metadata_file_content += 'END=%d\n' % (chapter['end_time'] * 1000)
  497.                     chapter_title = chapter.get('title')
  498.                     if chapter_title:
  499.                         metadata_file_content += 'title=%s\n' % ffmpeg_escape(chapter_title)
  500.                 f.write(metadata_file_content)
  501.                 in_filenames.append(metadata_filename)
  502.                 options.extend(['-map_metadata', '1'])
  504.         self._downloader.to_screen('[ffmpeg] Adding metadata to \'%s\'' % filename)
  505.         self.run_ffmpeg_multiple_files(in_filenames, temp_filename, options)
  506.         if chapters:
  507.             os.remove(metadata_filename)
  508.         os.remove(encodeFilename(filename))
  509.         os.rename(encodeFilename(temp_filename), encodeFilename(filename))
  510.         return [], info
  513. class FFmpegMergerPP(FFmpegPostProcessor):
  514.     def run(self, info):
  515.         filename = info['filepath']
  516.         temp_filename = prepend_extension(filename, 'temp')
  517.         args = ['-c', 'copy', '-map', '0:v:0', '-map', '1:a:0']
  518.         self._downloader.to_screen('[ffmpeg] Merging formats into "%s"' % filename)
  519.         self.run_ffmpeg_multiple_files(info['__files_to_merge'], temp_filename, args)
  520.         os.rename(encodeFilename(temp_filename), encodeFilename(filename))
  521.         return info['__files_to_merge'], info
  523.     def can_merge(self):
  524.         # TODO: figure out merge-capable ffmpeg version
  525.         if self.basename != 'avconv':
  526.             return True
  528.         required_version = '10-0'
  529.         if is_outdated_version(
  530.                 self._versions[self.basename], required_version):
  531.             warning = ('Your copy of %s is outdated and unable to properly mux separate video and audio files, '
  532.                        'youtube-dl will download single file media. '
  533.                        'Update %s to version %s or newer to fix this.') % (
  534.                            self.basename, self.basename, required_version)
  535.             if self._downloader:
  536.                 self._downloader.report_warning(warning)
  537.             return False
  538.         return True
  541. class FFmpegFixupStretchedPP(FFmpegPostProcessor):
  542.     def run(self, info):
  543.         stretched_ratio = info.get('stretched_ratio')
  544.         if stretched_ratio is None or stretched_ratio == 1:
  545.             return [], info
  547.         filename = info['filepath']
  548.         temp_filename = prepend_extension(filename, 'temp')
  550.         options = ['-c', 'copy', '-aspect', '%f' % stretched_ratio]
  551.         self._downloader.to_screen('[ffmpeg] Fixing aspect ratio in "%s"' % filename)
  552.         self.run_ffmpeg(filename, temp_filename, options)
  554.         os.remove(encodeFilename(filename))
  555.         os.rename(encodeFilename(temp_filename), encodeFilename(filename))
  557.         return [], info
  560. class FFmpegFixupM4aPP(FFmpegPostProcessor):
  561.     def run(self, info):
  562.         if info.get('container') != 'm4a_dash':
  563.             return [], info
  565.         filename = info['filepath']
  566.         temp_filename = prepend_extension(filename, 'temp')
  568.         options = ['-c', 'copy', '-f', 'mp4']
  569.         self._downloader.to_screen('[ffmpeg] Correcting container in "%s"' % filename)
  570.         self.run_ffmpeg(filename, temp_filename, options)
  572.         os.remove(encodeFilename(filename))
  573.         os.rename(encodeFilename(temp_filename), encodeFilename(filename))
  575.         return [], info
  578. class FFmpegFixupM3u8PP(FFmpegPostProcessor):
  579.     def run(self, info):
  580.         filename = info['filepath']
  581.         if self.get_audio_codec(filename) == 'aac':
  582.             temp_filename = prepend_extension(filename, 'temp')
  584.             options = ['-c', 'copy', '-f', 'mp4', '-bsf:a', 'aac_adtstoasc']
  585.             self._downloader.to_screen('[ffmpeg] Fixing malformed AAC bitstream in "%s"' % filename)
  586.             self.run_ffmpeg(filename, temp_filename, options)
  588.             os.remove(encodeFilename(filename))
  589.             os.rename(encodeFilename(temp_filename), encodeFilename(filename))
  590.         return [], info
  593. class FFmpegSubtitlesConvertorPP(FFmpegPostProcessor):
  594.     def __init__(self, downloader=None, format=None):
  595.         super(FFmpegSubtitlesConvertorPP, self).__init__(downloader)
  596.         self.format = format
  598.     def run(self, info):
  599.         subs = info.get('requested_subtitles')
  600.         filename = info['filepath']
  601.         new_ext = self.format
  602.         new_format = new_ext
  603.         if new_format == 'vtt':
  604.             new_format = 'webvtt'
  605.         if subs is None:
  606.             self._downloader.to_screen('[ffmpeg] There aren\'t any subtitles to convert')
  607.             return [], info
  608.         self._downloader.to_screen('[ffmpeg] Converting subtitles')
  609.         sub_filenames = []
  610.         for lang, sub in subs.items():
  611.             ext = sub['ext']
  612.             if ext == new_ext:
  613.                 self._downloader.to_screen(
  614.                     '[ffmpeg] Subtitle file for %s is already in the requested format' % new_ext)
  615.                 continue
  616.             old_file = subtitles_filename(filename, lang, ext, info.get('ext'))
  617.             sub_filenames.append(old_file)
  618.             new_file = subtitles_filename(filename, lang, new_ext, info.get('ext'))
  620.             if ext in ('dfxp', 'ttml', 'tt'):
  621.                 self._downloader.report_warning(
  622.                     'You have requested to convert dfxp (TTML) subtitles into another format, '
  623.                     'which results in style information loss')
  625.                 dfxp_file = old_file
  626.                 srt_file = subtitles_filename(filename, lang, 'srt', info.get('ext'))
  628.                 with open(dfxp_file, 'rb') as f:
  629.                     srt_data = dfxp2srt(f.read())
  631.                 with open(srt_file, 'w', encoding='utf-8') as f:
  632.                     f.write(srt_data)
  633.                 old_file = srt_file
  635.                 subs[lang] = {
  636.                     'ext': 'srt',
  637.                     'data': srt_data
  638.                 }
  640.                 if new_ext == 'srt':
  641.                     continue
  642.                 else:
  643.                     sub_filenames.append(srt_file)
  645.             self.run_ffmpeg(old_file, new_file, ['-f', new_format])
  647.             with open(new_file, 'r', encoding='utf-8') as f:
  648.                 subs[lang] = {
  649.                     'ext': new_ext,
  650.                     'data': f.read(),
  651.                 }
  653.         return sub_filenames, info