import os import subprocess import sys import time from .utils import ( compat_subprocess_get_DEVNULL, encodeFilename, PostProcessingError, shell_quote, subtitles_filename, prepend_extension, ) class PostProcessor(object): """Post Processor class. PostProcessor objects can be added to downloaders with their add_post_processor() method. When the downloader has finished a successful download, it will take its internal chain of PostProcessors and start calling the run() method on each one of them, first with an initial argument and then with the returned value of the previous PostProcessor. The chain will be stopped if one of them ever returns None or the end of the chain is reached. PostProcessor objects follow a "mutual registration" process similar to InfoExtractor objects. """ _downloader = None def __init__(self, downloader=None): self._downloader = downloader def set_downloader(self, downloader): """Sets the downloader for this PP.""" self._downloader = downloader def run(self, information): """Run the PostProcessor. The "information" argument is a dictionary like the ones composed by InfoExtractors. The only difference is that this one has an extra field called "filepath" that points to the downloaded file. This method returns a tuple, the first element of which describes whether the original file should be kept (i.e. not deleted - None for no preference), and the second of which is the updated information. In addition, this method may raise a PostProcessingError exception if post processing fails. """ return None, information # by default, keep file and do nothing class FFmpegPostProcessorError(PostProcessingError): pass class AudioConversionError(PostProcessingError): pass class FFmpegPostProcessor(PostProcessor): def __init__(self,downloader=None): PostProcessor.__init__(self, downloader) self._exes = self.detect_executables() @staticmethod def detect_executables(): def executable(exe): try: subprocess.Popen([exe, '-version'], stdout=subprocess.PIPE, stderr=subprocess.PIPE).communicate() except OSError: return False return exe programs = ['avprobe', 'avconv', 'ffmpeg', 'ffprobe'] return dict((program, executable(program)) for program in programs) def run_ffmpeg_multiple_files(self, input_paths, out_path, opts): if not self._exes['ffmpeg'] and not self._exes['avconv']: raise FFmpegPostProcessorError(u'ffmpeg or avconv not found. Please install one.') files_cmd = [] for path in input_paths: files_cmd.extend(['-i', encodeFilename(path)]) cmd = ([self._exes['avconv'] or self._exes['ffmpeg'], '-y'] + files_cmd + opts + [encodeFilename(self._ffmpeg_filename_argument(out_path))]) if self._downloader.params.get('verbose', False): self._downloader.to_screen(u'[debug] ffmpeg command line: %s' % shell_quote(cmd)) p = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE) stdout,stderr = p.communicate() if p.returncode != 0: stderr = stderr.decode('utf-8', 'replace') msg = stderr.strip().split('\n')[-1] raise FFmpegPostProcessorError(msg) def run_ffmpeg(self, path, out_path, opts): self.run_ffmpeg_multiple_files([path], out_path, opts) def _ffmpeg_filename_argument(self, fn): # ffmpeg broke --, see https://ffmpeg.org/trac/ffmpeg/ticket/2127 for details if fn.startswith(u'-'): return u'./' + fn return fn class FFmpegExtractAudioPP(FFmpegPostProcessor): 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 get_audio_codec(self, path): if not self._exes['ffprobe'] and not self._exes['avprobe']: raise PostProcessingError(u'ffprobe or avprobe not found. Please install one.') try: cmd = [self._exes['avprobe'] or self._exes['ffprobe'], '-show_streams', encodeFilename(self._ffmpeg_filename_argument(path))] handle = subprocess.Popen(cmd, stderr=compat_subprocess_get_DEVNULL(), stdout=subprocess.PIPE) output = handle.communicate()[0] if handle.wait() != 0: return None except (IOError, OSError): return None audio_codec = None for line in output.decode('ascii', 'ignore').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 return None def run_ffmpeg(self, path, out_path, codec, more_opts): if not self._exes['ffmpeg'] and not self._exes['avconv']: raise AudioConversionError('ffmpeg or avconv not found. Please install one.') 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'] filecodec = self.get_audio_codec(path) if filecodec is None: raise PostProcessingError(u'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 = [self._exes['avconv'] and '-bsf:a' or '-absf', 'aac_adtstoasc'] elif filecodec in ['aac', '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 += [self._exes['avconv'] and '-q:a' or '-aq', self._preferredquality] else: more_opts += [self._exes['avconv'] and '-b:a' or '-ab', self._preferredquality + 'k'] else: # We convert the audio (lossy) acodec = {'mp3': 'libmp3lame', 'aac': 'aac', 'm4a': 'aac', 'opus': 'opus', 'vorbis': 'libvorbis', 'wav': None}[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 += [self._exes['avconv'] and '-q:a' or '-aq', self._preferredquality] else: more_opts += [self._exes['avconv'] and '-b:a' or '-ab', self._preferredquality + 'k'] if self._preferredcodec == 'aac': more_opts += ['-f', 'adts'] if self._preferredcodec == 'm4a': more_opts += [self._exes['avconv'] and '-bsf:a' or '-absf', 'aac_adtstoasc'] if self._preferredcodec == 'vorbis': extension = 'ogg' if self._preferredcodec == 'wav': extension = 'wav' more_opts += ['-f', 'wav'] prefix, sep, ext = path.rpartition(u'.') # not os.path.splitext, since the latter does not work on unicode in all setups new_path = prefix + sep + extension # If we download foo.mp3 and convert it to... foo.mp3, then don't delete foo.mp3, silly. if new_path == path: self._nopostoverwrites = True try: if self._nopostoverwrites and os.path.exists(encodeFilename(new_path)): self._downloader.to_screen(u'[youtube] Post-process file %s exists, skipping' % new_path) else: self._downloader.to_screen(u'[' + (self._exes['avconv'] and 'avconv' or 'ffmpeg') + '] Destination: ' + new_path) self.run_ffmpeg(path, new_path, acodec, more_opts) except: etype,e,tb = sys.exc_info() if isinstance(e, AudioConversionError): msg = u'audio conversion failed: ' + e.msg else: msg = u'error running ' + (self._exes['avconv'] and 'avconv' or 'ffmpeg') raise PostProcessingError(msg) # Try to update the date time for extracted audio file. if information.get('filetime') is not None: try: os.utime(encodeFilename(new_path), (time.time(), information['filetime'])) except: self._downloader.report_warning(u'Cannot update utime of audio file') information['filepath'] = new_path return self._nopostoverwrites,information class FFmpegVideoConvertor(FFmpegPostProcessor): def __init__(self, downloader=None,preferedformat=None): super(FFmpegVideoConvertor, self).__init__(downloader) self._preferedformat=preferedformat def run(self, information): path = information['filepath'] prefix, sep, ext = path.rpartition(u'.') outpath = prefix + sep + self._preferedformat if information['ext'] == self._preferedformat: self._downloader.to_screen(u'[ffmpeg] Not converting video file %s - already is in target format %s' % (path, self._preferedformat)) return True,information self._downloader.to_screen(u'['+'ffmpeg'+'] Converting video from %s to %s, Destination: ' % (information['ext'], self._preferedformat) +outpath) self.run_ffmpeg(path, outpath, []) information['filepath'] = outpath information['format'] = self._preferedformat information['ext'] = self._preferedformat return False,information class FFmpegEmbedSubtitlePP(FFmpegPostProcessor): # See http://www.loc.gov/standards/iso639-2/ISO-639-2_utf-8.txt _lang_map = { 'aa': 'aar', 'ab': 'abk', 'ae': 'ave', 'af': 'afr', 'ak': 'aka', 'am': 'amh', 'an': 'arg', 'ar': 'ara', 'as': 'asm', 'av': 'ava', 'ay': 'aym', 'az': 'aze', 'ba': 'bak', 'be': 'bel', 'bg': 'bul', 'bh': 'bih', 'bi': 'bis', 'bm': 'bam', 'bn': 'ben', 'bo': 'bod', 'br': 'bre', 'bs': 'bos', 'ca': 'cat', 'ce': 'che', 'ch': 'cha', 'co': 'cos', 'cr': 'cre', 'cs': 'ces', 'cu': 'chu', 'cv': 'chv', 'cy': 'cym', 'da': 'dan', 'de': 'deu', 'dv': 'div', 'dz': 'dzo', 'ee': 'ewe', 'el': 'ell', 'en': 'eng', 'eo': 'epo', 'es': 'spa', 'et': 'est', 'eu': 'eus', 'fa': 'fas', 'ff': 'ful', 'fi': 'fin', 'fj': 'fij', 'fo': 'fao', 'fr': 'fra', 'fy': 'fry', 'ga': 'gle', 'gd': 'gla', 'gl': 'glg', 'gn': 'grn', 'gu': 'guj', 'gv': 'glv', 'ha': 'hau', 'he': 'heb', 'hi': 'hin', 'ho': 'hmo', 'hr': 'hrv', 'ht': 'hat', 'hu': 'hun', 'hy': 'hye', 'hz': 'her', 'ia': 'ina', 'id': 'ind', 'ie': 'ile', 'ig': 'ibo', 'ii': 'iii', 'ik': 'ipk', 'io': 'ido', 'is': 'isl', 'it': 'ita', 'iu': 'iku', 'ja': 'jpn', 'jv': 'jav', 'ka': 'kat', 'kg': 'kon', 'ki': 'kik', 'kj': 'kua', 'kk': 'kaz', 'kl': 'kal', 'km': 'khm', 'kn': 'kan', 'ko': 'kor', 'kr': 'kau', 'ks': 'kas', 'ku': 'kur', 'kv': 'kom', 'kw': 'cor', 'ky': 'kir', 'la': 'lat', 'lb': 'ltz', 'lg': 'lug', 'li': 'lim', 'ln': 'lin', 'lo': 'lao', 'lt': 'lit', 'lu': 'lub', 'lv': 'lav', 'mg': 'mlg', 'mh': 'mah', 'mi': 'mri', 'mk': 'mkd', 'ml': 'mal', 'mn': 'mon', 'mr': 'mar', 'ms': 'msa', 'mt': 'mlt', 'my': 'mya', 'na': 'nau', 'nb': 'nob', 'nd': 'nde', 'ne': 'nep', 'ng': 'ndo', 'nl': 'nld', 'nn': 'nno', 'no': 'nor', 'nr': 'nbl', 'nv': 'nav', 'ny': 'nya', 'oc': 'oci', 'oj': 'oji', 'om': 'orm', 'or': 'ori', 'os': 'oss', 'pa': 'pan', 'pi': 'pli', 'pl': 'pol', 'ps': 'pus', 'pt': 'por', 'qu': 'que', 'rm': 'roh', 'rn': 'run', 'ro': 'ron', 'ru': 'rus', 'rw': 'kin', 'sa': 'san', 'sc': 'srd', 'sd': 'snd', 'se': 'sme', 'sg': 'sag', 'si': 'sin', 'sk': 'slk', 'sl': 'slv', 'sm': 'smo', 'sn': 'sna', 'so': 'som', 'sq': 'sqi', 'sr': 'srp', 'ss': 'ssw', 'st': 'sot', 'su': 'sun', 'sv': 'swe', 'sw': 'swa', 'ta': 'tam', 'te': 'tel', 'tg': 'tgk', 'th': 'tha', 'ti': 'tir', 'tk': 'tuk', 'tl': 'tgl', 'tn': 'tsn', 'to': 'ton', 'tr': 'tur', 'ts': 'tso', 'tt': 'tat', 'tw': 'twi', 'ty': 'tah', 'ug': 'uig', 'uk': 'ukr', 'ur': 'urd', 'uz': 'uzb', 've': 'ven', 'vi': 'vie', 'vo': 'vol', 'wa': 'wln', 'wo': 'wol', 'xh': 'xho', 'yi': 'yid', 'yo': 'yor', 'za': 'zha', 'zh': 'zho', 'zu': 'zul', } def __init__(self, downloader=None, subtitlesformat='srt'): super(FFmpegEmbedSubtitlePP, self).__init__(downloader) self._subformat = subtitlesformat @classmethod def _conver_lang_code(cls, code): """Convert language code from ISO 639-1 to ISO 639-2/T""" return cls._lang_map.get(code[:2]) def run(self, information): if information['ext'] != u'mp4': self._downloader.to_screen(u'[ffmpeg] Subtitles can only be embedded in mp4 files') return True, information if not information.get('subtitles'): self._downloader.to_screen(u'[ffmpeg] There aren\'t any subtitles to embed') return True, information sub_langs = [key for key in information['subtitles']] filename = information['filepath'] input_files = [filename] + [subtitles_filename(filename, lang, self._subformat) for lang in sub_langs] opts = ['-map', '0:0', '-map', '0:1', '-c:v', 'copy', '-c:a', 'copy'] for (i, lang) in enumerate(sub_langs): opts.extend(['-map', '%d:0' % (i+1), '-c:s:%d' % i, 'mov_text']) lang_code = self._conver_lang_code(lang) if lang_code is not None: opts.extend(['-metadata:s:s:%d' % i, 'language=%s' % lang_code]) opts.extend(['-f', 'mp4']) temp_filename = filename + u'.temp' self._downloader.to_screen(u'[ffmpeg] 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)) return True, information class FFmpegMetadataPP(FFmpegPostProcessor): def run(self, info): metadata = {} if info.get('title') is not None: metadata['title'] = info['title'] if info.get('upload_date') is not None: metadata['date'] = info['upload_date'] if info.get('uploader') is not None: metadata['artist'] = info['uploader'] elif info.get('uploader_id') is not None: metadata['artist'] = info['uploader_id'] if not metadata: self._downloader.to_screen(u'[ffmpeg] There isn\'t any metadata to add') return True, info filename = info['filepath'] temp_filename = prepend_extension(filename, 'temp') options = ['-c', 'copy'] for (name, value) in metadata.items(): options.extend(['-metadata', '%s=%s' % (name, value)]) self._downloader.to_screen(u'[ffmpeg] Adding metadata to \'%s\'' % filename) self.run_ffmpeg(filename, temp_filename, options) os.remove(encodeFilename(filename)) os.rename(encodeFilename(temp_filename), encodeFilename(filename)) return True, info class FFmpegMergerPP(FFmpegPostProcessor): def run(self, info): filename = info['filepath'] args = ['-c', 'copy'] self.run_ffmpeg_multiple_files(info['__files_to_merge'], filename, args) return True, info