from __future__ import unicode_literals import io import os import subprocess import time import re import json from .common import AudioConversionError, PostProcessor from ..compat import compat_str from ..utils import ( encodeArgument, encodeFilename, get_exe_version, is_outdated_version, PostProcessingError, prepend_extension, shell_quote, dfxp2srt, ISO639Utils, process_communicate_or_kill, replace_extension, traverse_dict, ) EXT_TO_OUT_FORMATS = { 'aac': 'adts', 'flac': 'flac', 'm4a': 'ipod', 'mka': 'matroska', 'mkv': 'matroska', 'mpg': 'mpeg', 'ogv': 'ogg', 'ts': 'mpegts', 'wma': 'asf', 'wmv': 'asf', } ACODECS = { 'mp3': 'libmp3lame', 'aac': 'aac', 'flac': 'flac', 'm4a': 'aac', 'opus': 'libopus', 'vorbis': 'libvorbis', 'wav': None, } class FFmpegPostProcessorError(PostProcessingError): pass class FFmpegPostProcessor(PostProcessor): def __init__(self, downloader=None): PostProcessor.__init__(self, downloader) self._determine_executables() def check_version(self): if not self.available: raise FFmpegPostProcessorError('ffmpeg not found. Please install') required_version = '10-0' if self.basename == 'avconv' else '1.0' if is_outdated_version( self._versions[self.basename], required_version): warning = 'Your copy of %s is outdated, update %s to version %s or newer if you encounter any errors.' % ( self.basename, self.basename, required_version) self.report_warning(warning) @staticmethod def get_versions(downloader=None): return FFmpegPostProcessor(downloader)._versions def _determine_executables(self): programs = ['avprobe', 'avconv', 'ffmpeg', 'ffprobe'] prefer_ffmpeg = True def get_ffmpeg_version(path): ver = get_exe_version(path, args=['-version']) if ver: regexs = [ r'(?:\d+:)?([0-9.]+)-[0-9]+ubuntu[0-9.]+$', # Ubuntu, see [1] r'n([0-9.]+)$', # Arch Linux # 1. http://www.ducea.com/2006/06/17/ubuntu-package-version-naming-explanation/ ] for regex in regexs: mobj = re.match(regex, ver) if mobj: ver = mobj.group(1) return ver self.basename = None self.probe_basename = None self._paths = None self._versions = None if self._downloader: prefer_ffmpeg = self.get_param('prefer_ffmpeg', True) location = self.get_param('ffmpeg_location') if location is not None: if not os.path.exists(location): self.report_warning( 'ffmpeg-location %s does not exist! ' 'Continuing without ffmpeg.' % (location)) self._versions = {} return elif not os.path.isdir(location): basename = os.path.splitext(os.path.basename(location))[0] if basename not in programs: self.report_warning( 'Cannot identify executable %s, its basename should be one of %s. ' 'Continuing without ffmpeg.' % (location, ', '.join(programs))) self._versions = {} return None location = os.path.dirname(os.path.abspath(location)) if basename in ('ffmpeg', 'ffprobe'): prefer_ffmpeg = True self._paths = dict( (p, os.path.join(location, p)) for p in programs) self._versions = dict( (p, get_ffmpeg_version(self._paths[p])) for p in programs) if self._versions is None: self._versions = dict( (p, get_ffmpeg_version(p)) for p in programs) self._paths = dict((p, p) for p in programs) if prefer_ffmpeg is False: prefs = ('avconv', 'ffmpeg') else: prefs = ('ffmpeg', 'avconv') for p in prefs: if self._versions[p]: self.basename = p break if prefer_ffmpeg is False: prefs = ('avprobe', 'ffprobe') else: prefs = ('ffprobe', 'avprobe') for p in prefs: if self._versions[p]: self.probe_basename = p break @property def available(self): return self.basename is not None @property def executable(self): return self._paths[self.basename] @property def probe_available(self): return self.probe_basename is not None @property def probe_executable(self): return self._paths[self.probe_basename] def get_audio_codec(self, path): if not self.probe_available and not self.available: raise PostProcessingError('ffprobe and ffmpeg not found. Please install') try: if self.probe_available: cmd = [ encodeFilename(self.probe_executable, True), encodeArgument('-show_streams')] else: cmd = [ encodeFilename(self.executable, True), encodeArgument('-i')] cmd.append(encodeFilename(self._ffmpeg_filename_argument(path), True)) self.write_debug('%s command line: %s' % (self.basename, shell_quote(cmd))) handle = subprocess.Popen( cmd, stderr=subprocess.PIPE, stdout=subprocess.PIPE, stdin=subprocess.PIPE) stdout_data, stderr_data = process_communicate_or_kill(handle) expected_ret = 0 if self.probe_available else 1 if handle.wait() != expected_ret: return None except (IOError, OSError): return None output = (stdout_data if self.probe_available else stderr_data).decode('ascii', 'ignore') if self.probe_available: audio_codec = None for line in output.split('\n'): if line.startswith('codec_name='): audio_codec = line.split('=')[1].strip() elif line.strip() == 'codec_type=audio' and audio_codec is not None: return audio_codec else: # Stream #FILE_INDEX:STREAM_INDEX[STREAM_ID](LANGUAGE): CODEC_TYPE: CODEC_NAME mobj = re.search( r'Stream\s*#\d+:\d+(?:\[0x[0-9a-f]+\])?(?:\([a-z]{3}\))?:\s*Audio:\s*([0-9a-z]+)', output) if mobj: return mobj.group(1) return None def get_metadata_object(self, path, opts=[]): if self.probe_basename != 'ffprobe': if self.probe_available: self.report_warning('Only ffprobe is supported for metadata extraction') raise PostProcessingError('ffprobe not found. Please install.') self.check_version() cmd = [ encodeFilename(self.probe_executable, True), encodeArgument('-hide_banner'), encodeArgument('-show_format'), encodeArgument('-show_streams'), encodeArgument('-print_format'), encodeArgument('json'), ] cmd += opts cmd.append(encodeFilename(self._ffmpeg_filename_argument(path), True)) self.write_debug('ffprobe command line: %s' % shell_quote(cmd)) p = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, stdin=subprocess.PIPE) stdout, stderr = p.communicate() return json.loads(stdout.decode('utf-8', 'replace')) def get_stream_number(self, path, keys, value): streams = self.get_metadata_object(path)['streams'] num = next( (i for i, stream in enumerate(streams) if traverse_dict(stream, keys, casesense=False) == value), None) return num, len(streams) def run_ffmpeg_multiple_files(self, input_paths, out_path, opts): return self.real_run_ffmpeg( [(path, []) for path in input_paths], [(out_path, opts)]) def real_run_ffmpeg(self, input_path_opts, output_path_opts): self.check_version() oldest_mtime = min( os.stat(encodeFilename(path)).st_mtime for path, _ in input_path_opts) cmd = [encodeFilename(self.executable, True), encodeArgument('-y')] # avconv does not have repeat option if self.basename == 'ffmpeg': cmd += [encodeArgument('-loglevel'), encodeArgument('repeat+info')] def make_args(file, args, name, number): keys = ['_%s%d' % (name, number), '_%s' % name] if name == 'o' and number == 1: keys.append('') args += self._configuration_args(self.basename, keys) if name == 'i': args.append('-i') return ( [encodeArgument(arg) for arg in args] + [encodeFilename(self._ffmpeg_filename_argument(file), True)]) for arg_type, path_opts in (('i', input_path_opts), ('o', output_path_opts)): cmd += [arg for i, o in enumerate(path_opts) for arg in make_args(o[0], o[1], arg_type, i + 1)] self.write_debug('ffmpeg command line: %s' % shell_quote(cmd)) p = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, stdin=subprocess.PIPE) stdout, stderr = process_communicate_or_kill(p) if p.returncode != 0: stderr = stderr.decode('utf-8', 'replace').strip() if self.get_param('verbose', False): self.report_error(stderr) raise FFmpegPostProcessorError(stderr.split('\n')[-1]) for out_path, _ in output_path_opts: self.try_utime(out_path, oldest_mtime, oldest_mtime) return stderr.decode('utf-8', 'replace') def run_ffmpeg(self, path, out_path, opts): return self.run_ffmpeg_multiple_files([path], out_path, opts) def _ffmpeg_filename_argument(self, fn): # Always use 'file:' because the filename may contain ':' (ffmpeg # interprets that as a protocol) or can start with '-' (-- is broken in # ffmpeg, see https://ffmpeg.org/trac/ffmpeg/ticket/2127 for details) # Also leave '-' intact in order not to break streaming to stdout. if fn.startswith(('http://', 'https://')): return fn return 'file:' + fn if fn != '-' else fn class FFmpegExtractAudioPP(FFmpegPostProcessor): COMMON_AUDIO_EXTENSIONS = ('wav', 'flac', 'm4a', 'aiff', 'mp3', 'ogg', 'mka', 'opus', 'wma') def __init__(self, downloader=None, preferredcodec=None, preferredquality=None, nopostoverwrites=False): FFmpegPostProcessor.__init__(self, downloader) if preferredcodec is None: preferredcodec = 'best' self._preferredcodec = preferredcodec self._preferredquality = preferredquality self._nopostoverwrites = nopostoverwrites def run_ffmpeg(self, path, out_path, codec, more_opts): if codec is None: acodec_opts = [] else: acodec_opts = ['-acodec', codec] opts = ['-vn'] + acodec_opts + more_opts try: FFmpegPostProcessor.run_ffmpeg(self, path, out_path, opts) except FFmpegPostProcessorError as err: raise AudioConversionError(err.msg) def run(self, information): path = information['filepath'] orig_ext = information['ext'] if self._preferredcodec == 'best' and orig_ext in self.COMMON_AUDIO_EXTENSIONS: self.to_screen('Skipping audio extraction since the file is already in a common audio format') return [], information filecodec = self.get_audio_codec(path) if filecodec is None: raise PostProcessingError('WARNING: unable to obtain file audio codec with ffprobe') more_opts = [] if self._preferredcodec == 'best' or self._preferredcodec == filecodec or (self._preferredcodec == 'm4a' and filecodec == 'aac'): if filecodec == 'aac' and self._preferredcodec in ['m4a', 'best']: # Lossless, but in another container acodec = 'copy' extension = 'm4a' more_opts = ['-bsf:a', 'aac_adtstoasc'] elif filecodec in ['aac', 'flac', 'mp3', 'vorbis', 'opus']: # Lossless if possible acodec = 'copy' extension = filecodec if filecodec == 'aac': more_opts = ['-f', 'adts'] if filecodec == 'vorbis': extension = 'ogg' else: # MP3 otherwise. acodec = 'libmp3lame' extension = 'mp3' more_opts = [] if self._preferredquality is not None: if int(self._preferredquality) < 10: more_opts += ['-q:a', self._preferredquality] else: more_opts += ['-b:a', self._preferredquality + 'k'] else: # We convert the audio (lossy if codec is lossy) acodec = ACODECS[self._preferredcodec] extension = self._preferredcodec more_opts = [] if self._preferredquality is not None: # The opus codec doesn't support the -aq option if int(self._preferredquality) < 10 and extension != 'opus': more_opts += ['-q:a', self._preferredquality] else: more_opts += ['-b:a', self._preferredquality + 'k'] if self._preferredcodec == 'aac': more_opts += ['-f', 'adts'] if self._preferredcodec == 'm4a': more_opts += ['-bsf:a', 'aac_adtstoasc'] if self._preferredcodec == 'vorbis': extension = 'ogg' if self._preferredcodec == 'wav': extension = 'wav' more_opts += ['-f', 'wav'] prefix, sep, ext = path.rpartition('.') # not os.path.splitext, since the latter does not work on unicode in all setups new_path = prefix + sep + extension information['filepath'] = new_path information['ext'] = extension # If we download foo.mp3 and convert it to... foo.mp3, then don't delete foo.mp3, silly. if (new_path == path or (self._nopostoverwrites and os.path.exists(encodeFilename(new_path)))): self.to_screen('Post-process file %s exists, skipping' % new_path) return [], information try: self.to_screen('Destination: ' + new_path) self.run_ffmpeg(path, new_path, acodec, more_opts) except AudioConversionError as e: raise PostProcessingError( 'audio conversion failed: ' + e.msg) except Exception: raise PostProcessingError('error running ' + self.basename) # Try to update the date time for extracted audio file. if information.get('filetime') is not None: self.try_utime( new_path, time.time(), information['filetime'], errnote='Cannot update utime of audio file') return [path], information class FFmpegVideoRemuxerPP(FFmpegPostProcessor): def __init__(self, downloader=None, preferedformat=None): super(FFmpegVideoRemuxerPP, self).__init__(downloader) self._preferedformats = preferedformat.lower().split('/') def run(self, information): path = information['filepath'] sourceext, targetext = information['ext'].lower(), None for pair in self._preferedformats: kv = pair.split('>') if len(kv) == 1 or kv[0].strip() == sourceext: targetext = kv[-1].strip() break _skip_msg = ( 'could not find a mapping for %s' if not targetext else 'already is in target format %s' if sourceext == targetext else None) if _skip_msg: self.to_screen('Not remuxing media file %s; %s' % (path, _skip_msg % sourceext)) return [], information options = ['-c', 'copy', '-map', '0', '-dn'] if targetext in ['mp4', 'm4a', 'mov']: options.extend(['-movflags', '+faststart']) prefix, sep, oldext = path.rpartition('.') outpath = prefix + sep + targetext self.to_screen('Remuxing video from %s to %s; Destination: %s' % (sourceext, targetext, outpath)) self.run_ffmpeg(path, outpath, options) information['filepath'] = outpath information['format'] = targetext information['ext'] = targetext return [path], information class FFmpegVideoConvertorPP(FFmpegPostProcessor): def __init__(self, downloader=None, preferedformat=None): super(FFmpegVideoConvertorPP, self).__init__(downloader) self._preferedformat = preferedformat def run(self, information): path = information['filepath'] if information['ext'] == self._preferedformat: self.to_screen('Not converting video file %s - already is in target format %s' % (path, self._preferedformat)) return [], information options = [] if self._preferedformat == 'avi': options.extend(['-c:v', 'libxvid', '-vtag', 'XVID']) prefix, sep, ext = path.rpartition('.') outpath = prefix + sep + self._preferedformat self.to_screen('Converting video from %s to %s, Destination: ' % (information['ext'], self._preferedformat) + outpath) self.run_ffmpeg(path, outpath, options) information['filepath'] = outpath information['format'] = self._preferedformat information['ext'] = self._preferedformat return [path], information class FFmpegEmbedSubtitlePP(FFmpegPostProcessor): def __init__(self, downloader=None, already_have_subtitle=False): super(FFmpegEmbedSubtitlePP, self).__init__(downloader) self._already_have_subtitle = already_have_subtitle def run(self, information): if information['ext'] not in ('mp4', 'webm', 'mkv'): self.to_screen('Subtitles can only be embedded in mp4, webm or mkv files') return [], information subtitles = information.get('requested_subtitles') if not subtitles: self.to_screen('There aren\'t any subtitles to embed') return [], information filename = information['filepath'] ext = information['ext'] sub_langs = [] sub_filenames = [] webm_vtt_warn = False mp4_ass_warn = False for lang, sub_info in subtitles.items(): sub_ext = sub_info['ext'] if sub_ext == 'json': self.report_warning('JSON subtitles cannot be embedded') elif ext != 'webm' or ext == 'webm' and sub_ext == 'vtt': sub_langs.append(lang) sub_filenames.append(sub_info['filepath']) else: if not webm_vtt_warn and ext == 'webm' and sub_ext != 'vtt': webm_vtt_warn = True self.report_warning('Only WebVTT subtitles can be embedded in webm files') if not mp4_ass_warn and ext == 'mp4' and sub_ext == 'ass': mp4_ass_warn = True self.report_warning('ASS subtitles cannot be properly embedded in mp4 files; expect issues') if not sub_langs: return [], information input_files = [filename] + sub_filenames opts = [ '-c', 'copy', '-map', '0', '-dn', # Don't copy the existing subtitles, we may be running the # postprocessor a second time '-map', '-0:s', # Don't copy Apple TV chapters track, bin_data (see #19042, #19024, # https://trac.ffmpeg.org/ticket/6016) '-map', '-0:d', ] if information['ext'] == 'mp4': opts += ['-c:s', 'mov_text'] for (i, lang) in enumerate(sub_langs): opts.extend(['-map', '%d:0' % (i + 1)]) lang_code = ISO639Utils.short2long(lang) or lang opts.extend(['-metadata:s:s:%d' % i, 'language=%s' % lang_code]) temp_filename = prepend_extension(filename, 'temp') self.to_screen('Embedding subtitles in "%s"' % filename) self.run_ffmpeg_multiple_files(input_files, temp_filename, opts) os.remove(encodeFilename(filename)) os.rename(encodeFilename(temp_filename), encodeFilename(filename)) files_to_delete = [] if self._already_have_subtitle else sub_filenames return files_to_delete, information class FFmpegMetadataPP(FFmpegPostProcessor): def run(self, info): metadata = {} def add(meta_list, info_list=None): if not info_list: info_list = meta_list if not isinstance(meta_list, (list, tuple)): meta_list = (meta_list,) if not isinstance(info_list, (list, tuple)): info_list = (info_list,) for info_f in info_list: if info.get(info_f) is not None: for meta_f in meta_list: metadata[meta_f] = info[info_f] break # See [1-4] for some info on media metadata/metadata supported # by ffmpeg. # 1. https://kdenlive.org/en/project/adding-meta-data-to-mp4-video/ # 2. https://wiki.multimedia.cx/index.php/FFmpeg_Metadata # 3. https://kodi.wiki/view/Video_file_tagging add('title', ('track', 'title')) add('date', 'upload_date') add(('description', 'comment'), 'description') add('purl', 'webpage_url') add('track', 'track_number') add('artist', ('artist', 'creator', 'uploader', 'uploader_id')) add('genre') add('album') add('album_artist') add('disc', 'disc_number') add('show', 'series') add('season_number') add('episode_id', ('episode', 'episode_id')) add('episode_sort', 'episode_number') if not metadata: self.to_screen('There isn\'t any metadata to add') return [], info filename = info['filepath'] temp_filename = prepend_extension(filename, 'temp') in_filenames = [filename] options = ['-map', '0', '-dn'] if info['ext'] == 'm4a': options.extend(['-vn', '-acodec', 'copy']) else: options.extend(['-c', 'copy']) for (name, value) in metadata.items(): options.extend(['-metadata', '%s=%s' % (name, value)]) chapters = info.get('chapters', []) if chapters: metadata_filename = replace_extension(filename, 'meta') with io.open(metadata_filename, 'wt', encoding='utf-8') as f: def ffmpeg_escape(text): return re.sub(r'(=|;|#|\\|\n)', r'\\\1', text) metadata_file_content = ';FFMETADATA1\n' for chapter in chapters: metadata_file_content += '[CHAPTER]\nTIMEBASE=1/1000\n' metadata_file_content += 'START=%d\n' % (chapter['start_time'] * 1000) metadata_file_content += 'END=%d\n' % (chapter['end_time'] * 1000) chapter_title = chapter.get('title') if chapter_title: metadata_file_content += 'title=%s\n' % ffmpeg_escape(chapter_title) f.write(metadata_file_content) in_filenames.append(metadata_filename) options.extend(['-map_metadata', '1']) if '__infojson_filename' in info and info['ext'] in ('mkv', 'mka'): old_stream, new_stream = self.get_stream_number( filename, ('tags', 'mimetype'), 'application/json') if old_stream is not None: options.extend(['-map', '-0:%d' % old_stream]) new_stream -= 1 options.extend([ '-attach', info['__infojson_filename'], '-metadata:s:%d' % new_stream, 'mimetype=application/json' ]) self.to_screen('Adding metadata to \'%s\'' % filename) self.run_ffmpeg_multiple_files(in_filenames, temp_filename, options) if chapters: os.remove(metadata_filename) os.remove(encodeFilename(filename)) os.rename(encodeFilename(temp_filename), encodeFilename(filename)) return [], info class FFmpegMergerPP(FFmpegPostProcessor): def run(self, info): filename = info['filepath'] temp_filename = prepend_extension(filename, 'temp') args = ['-c', 'copy'] for (i, fmt) in enumerate(info['requested_formats']): if fmt.get('acodec') != 'none': args.extend(['-map', '%u:a:0' % (i)]) if fmt.get('vcodec') != 'none': args.extend(['-map', '%u:v:0' % (i)]) self.to_screen('Merging formats into "%s"' % filename) self.run_ffmpeg_multiple_files(info['__files_to_merge'], temp_filename, args) os.rename(encodeFilename(temp_filename), encodeFilename(filename)) return info['__files_to_merge'], info def can_merge(self): # TODO: figure out merge-capable ffmpeg version if self.basename != 'avconv': return True required_version = '10-0' if is_outdated_version( self._versions[self.basename], required_version): warning = ('Your copy of %s is outdated and unable to properly mux separate video and audio files, ' 'yt-dlp will download single file media. ' 'Update %s to version %s or newer to fix this.') % ( self.basename, self.basename, required_version) self.report_warning(warning) return False return True class FFmpegFixupStretchedPP(FFmpegPostProcessor): def run(self, info): stretched_ratio = info.get('stretched_ratio') if stretched_ratio is None or stretched_ratio == 1: return [], info filename = info['filepath'] temp_filename = prepend_extension(filename, 'temp') options = ['-c', 'copy', '-map', '0', '-dn', '-aspect', '%f' % stretched_ratio] self.to_screen('Fixing aspect ratio in "%s"' % filename) self.run_ffmpeg(filename, temp_filename, options) os.remove(encodeFilename(filename)) os.rename(encodeFilename(temp_filename), encodeFilename(filename)) return [], info class FFmpegFixupM4aPP(FFmpegPostProcessor): def run(self, info): if info.get('container') != 'm4a_dash': return [], info filename = info['filepath'] temp_filename = prepend_extension(filename, 'temp') options = ['-c', 'copy', '-map', '0', '-dn', '-f', 'mp4'] self.to_screen('Correcting container in "%s"' % filename) self.run_ffmpeg(filename, temp_filename, options) os.remove(encodeFilename(filename)) os.rename(encodeFilename(temp_filename), encodeFilename(filename)) return [], info class FFmpegFixupM3u8PP(FFmpegPostProcessor): def run(self, info): filename = info['filepath'] if self.get_audio_codec(filename) == 'aac': temp_filename = prepend_extension(filename, 'temp') options = ['-c', 'copy', '-map', '0', '-dn', '-f', 'mp4', '-bsf:a', 'aac_adtstoasc'] self.to_screen('Fixing malformed AAC bitstream in "%s"' % filename) self.run_ffmpeg(filename, temp_filename, options) os.remove(encodeFilename(filename)) os.rename(encodeFilename(temp_filename), encodeFilename(filename)) return [], info class FFmpegSubtitlesConvertorPP(FFmpegPostProcessor): def __init__(self, downloader=None, format=None): super(FFmpegSubtitlesConvertorPP, self).__init__(downloader) self.format = format def run(self, info): subs = info.get('requested_subtitles') new_ext = self.format new_format = new_ext if new_format == 'vtt': new_format = 'webvtt' if subs is None: self.to_screen('There aren\'t any subtitles to convert') return [], info self.to_screen('Converting subtitles') sub_filenames = [] for lang, sub in subs.items(): ext = sub['ext'] if ext == new_ext: self.to_screen('Subtitle file for %s is already in the requested format' % new_ext) continue elif ext == 'json': self.to_screen( 'You have requested to convert json subtitles into another format, ' 'which is currently not possible') continue old_file = sub['filepath'] sub_filenames.append(old_file) new_file = replace_extension(old_file, new_ext) if ext in ('dfxp', 'ttml', 'tt'): self.report_warning( 'You have requested to convert dfxp (TTML) subtitles into another format, ' 'which results in style information loss') dfxp_file = old_file srt_file = replace_extension(old_file, 'srt') with open(dfxp_file, 'rb') as f: srt_data = dfxp2srt(f.read()) with io.open(srt_file, 'wt', encoding='utf-8') as f: f.write(srt_data) old_file = srt_file subs[lang] = { 'ext': 'srt', 'data': srt_data, 'filepath': srt_file, } if new_ext == 'srt': continue else: sub_filenames.append(srt_file) self.run_ffmpeg(old_file, new_file, ['-f', new_format]) with io.open(new_file, 'rt', encoding='utf-8') as f: subs[lang] = { 'ext': new_ext, 'data': f.read(), 'filepath': new_file, } info['__files_to_move'][new_file] = replace_extension( info['__files_to_move'][old_file], new_ext) return sub_filenames, info class FFmpegSplitChaptersPP(FFmpegPostProcessor): def _prepare_filename(self, number, chapter, info): info = info.copy() info.update({ 'section_number': number, 'section_title': chapter.get('title'), 'section_start': chapter.get('start_time'), 'section_end': chapter.get('end_time'), }) return self._downloader.prepare_filename(info, 'chapter') def _ffmpeg_args_for_chapter(self, number, chapter, info): destination = self._prepare_filename(number, chapter, info) if not self._downloader._ensure_dir_exists(encodeFilename(destination)): return chapter['filepath'] = destination self.to_screen('Chapter %03d; Destination: %s' % (number, destination)) return ( destination, ['-ss', compat_str(chapter['start_time']), '-t', compat_str(chapter['end_time'] - chapter['start_time'])]) def run(self, info): chapters = info.get('chapters') or [] if not chapters: self.report_warning('There are no tracks to extract') return [], info self.to_screen('Splitting video by chapters; %d chapters found' % len(chapters)) for idx, chapter in enumerate(chapters): destination, opts = self._ffmpeg_args_for_chapter(idx + 1, chapter, info) self.real_run_ffmpeg([(info['filepath'], opts)], [(destination, ['-c', 'copy'])]) return [], info