7 from .common import AudioConversionError, PostProcessor
11 compat_subprocess_get_DEVNULL,
21 class FFmpegPostProcessorError(PostProcessingError):
24 class FFmpegPostProcessor(PostProcessor):
25 def __init__(self,downloader=None):
26 PostProcessor.__init__(self, downloader)
27 self._exes = self.detect_executables()
30 def detect_executables():
31 programs = ['avprobe', 'avconv', 'ffmpeg', 'ffprobe']
32 return dict((program, check_executable(program, ['-version'])) for program in programs)
34 def _get_executable(self):
35 if self._downloader.params.get('prefer_ffmpeg', False):
36 return self._exes['ffmpeg'] or self._exes['avconv']
38 return self._exes['avconv'] or self._exes['ffmpeg']
40 def _uses_avconv(self):
41 return self._get_executable() == self._exes['avconv']
43 def run_ffmpeg_multiple_files(self, input_paths, out_path, opts):
44 if not self._get_executable():
45 raise FFmpegPostProcessorError(u'ffmpeg or avconv not found. Please install one.')
48 for path in input_paths:
49 files_cmd.extend(['-i', encodeFilename(path, True)])
50 cmd = ([self._get_executable(), '-y'] + files_cmd
52 [encodeFilename(self._ffmpeg_filename_argument(out_path), True)])
54 if self._downloader.params.get('verbose', False):
55 self._downloader.to_screen(u'[debug] ffmpeg command line: %s' % shell_quote(cmd))
56 p = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
57 stdout,stderr = p.communicate()
59 stderr = stderr.decode('utf-8', 'replace')
60 msg = stderr.strip().split('\n')[-1]
61 raise FFmpegPostProcessorError(msg)
63 def run_ffmpeg(self, path, out_path, opts):
64 self.run_ffmpeg_multiple_files([path], out_path, opts)
66 def _ffmpeg_filename_argument(self, fn):
67 # ffmpeg broke --, see https://ffmpeg.org/trac/ffmpeg/ticket/2127 for details
68 if fn.startswith(u'-'):
73 class FFmpegExtractAudioPP(FFmpegPostProcessor):
74 def __init__(self, downloader=None, preferredcodec=None, preferredquality=None, nopostoverwrites=False):
75 FFmpegPostProcessor.__init__(self, downloader)
76 if preferredcodec is None:
77 preferredcodec = 'best'
78 self._preferredcodec = preferredcodec
79 self._preferredquality = preferredquality
80 self._nopostoverwrites = nopostoverwrites
82 def get_audio_codec(self, path):
83 if not self._exes['ffprobe'] and not self._exes['avprobe']:
84 raise PostProcessingError(u'ffprobe or avprobe not found. Please install one.')
87 self._exes['avprobe'] or self._exes['ffprobe'],
89 encodeFilename(self._ffmpeg_filename_argument(path), True)]
90 handle = subprocess.Popen(cmd, stderr=compat_subprocess_get_DEVNULL(), stdout=subprocess.PIPE)
91 output = handle.communicate()[0]
92 if handle.wait() != 0:
94 except (IOError, OSError):
97 for line in output.decode('ascii', 'ignore').split('\n'):
98 if line.startswith('codec_name='):
99 audio_codec = line.split('=')[1].strip()
100 elif line.strip() == 'codec_type=audio' and audio_codec is not None:
104 def run_ffmpeg(self, path, out_path, codec, more_opts):
108 acodec_opts = ['-acodec', codec]
109 opts = ['-vn'] + acodec_opts + more_opts
111 FFmpegPostProcessor.run_ffmpeg(self, path, out_path, opts)
112 except FFmpegPostProcessorError as err:
113 raise AudioConversionError(err.msg)
115 def run(self, information):
116 path = information['filepath']
118 filecodec = self.get_audio_codec(path)
119 if filecodec is None:
120 raise PostProcessingError(u'WARNING: unable to obtain file audio codec with ffprobe')
122 uses_avconv = self._uses_avconv()
124 if self._preferredcodec == 'best' or self._preferredcodec == filecodec or (self._preferredcodec == 'm4a' and filecodec == 'aac'):
125 if filecodec == 'aac' and self._preferredcodec in ['m4a', 'best']:
126 # Lossless, but in another container
129 more_opts = ['-bsf:a' if uses_avconv else '-absf', 'aac_adtstoasc']
130 elif filecodec in ['aac', 'mp3', 'vorbis', 'opus']:
131 # Lossless if possible
133 extension = filecodec
134 if filecodec == 'aac':
135 more_opts = ['-f', 'adts']
136 if filecodec == 'vorbis':
140 acodec = 'libmp3lame'
143 if self._preferredquality is not None:
144 if int(self._preferredquality) < 10:
145 more_opts += ['-q:a' if uses_avconv else '-aq', self._preferredquality]
147 more_opts += ['-b:a' if uses_avconv else '-ab', self._preferredquality + 'k']
149 # We convert the audio (lossy)
150 acodec = {'mp3': 'libmp3lame', 'aac': 'aac', 'm4a': 'aac', 'opus': 'opus', 'vorbis': 'libvorbis', 'wav': None}[self._preferredcodec]
151 extension = self._preferredcodec
153 if self._preferredquality is not None:
154 # The opus codec doesn't support the -aq option
155 if int(self._preferredquality) < 10 and extension != 'opus':
156 more_opts += ['-q:a' if uses_avconv else '-aq', self._preferredquality]
158 more_opts += ['-b:a' if uses_avconv else '-ab', self._preferredquality + 'k']
159 if self._preferredcodec == 'aac':
160 more_opts += ['-f', 'adts']
161 if self._preferredcodec == 'm4a':
162 more_opts += ['-bsf:a' if uses_avconv else '-absf', 'aac_adtstoasc']
163 if self._preferredcodec == 'vorbis':
165 if self._preferredcodec == 'wav':
167 more_opts += ['-f', 'wav']
169 prefix, sep, ext = path.rpartition(u'.') # not os.path.splitext, since the latter does not work on unicode in all setups
170 new_path = prefix + sep + extension
172 # If we download foo.mp3 and convert it to... foo.mp3, then don't delete foo.mp3, silly.
174 self._nopostoverwrites = True
177 if self._nopostoverwrites and os.path.exists(encodeFilename(new_path)):
178 self._downloader.to_screen(u'[youtube] Post-process file %s exists, skipping' % new_path)
180 self._downloader.to_screen(u'[' + self._get_executable() + '] Destination: ' + new_path)
181 self.run_ffmpeg(path, new_path, acodec, more_opts)
183 etype,e,tb = sys.exc_info()
184 if isinstance(e, AudioConversionError):
185 msg = u'audio conversion failed: ' + e.msg
187 msg = u'error running ' + self._get_executable()
188 raise PostProcessingError(msg)
190 # Try to update the date time for extracted audio file.
191 if information.get('filetime') is not None:
193 os.utime(encodeFilename(new_path), (time.time(), information['filetime']))
195 self._downloader.report_warning(u'Cannot update utime of audio file')
197 information['filepath'] = new_path
198 return self._nopostoverwrites,information
201 class FFmpegVideoConvertor(FFmpegPostProcessor):
202 def __init__(self, downloader=None,preferedformat=None):
203 super(FFmpegVideoConvertor, self).__init__(downloader)
204 self._preferedformat=preferedformat
206 def run(self, information):
207 path = information['filepath']
208 prefix, sep, ext = path.rpartition(u'.')
209 outpath = prefix + sep + self._preferedformat
210 if information['ext'] == self._preferedformat:
211 self._downloader.to_screen(u'[ffmpeg] Not converting video file %s - already is in target format %s' % (path, self._preferedformat))
212 return True,information
213 self._downloader.to_screen(u'['+'ffmpeg'+'] Converting video from %s to %s, Destination: ' % (information['ext'], self._preferedformat) +outpath)
214 self.run_ffmpeg(path, outpath, [])
215 information['filepath'] = outpath
216 information['format'] = self._preferedformat
217 information['ext'] = self._preferedformat
218 return False,information
221 class FFmpegEmbedSubtitlePP(FFmpegPostProcessor):
222 # See http://www.loc.gov/standards/iso639-2/ISO-639-2_utf-8.txt
410 def __init__(self, downloader=None, subtitlesformat='srt'):
411 super(FFmpegEmbedSubtitlePP, self).__init__(downloader)
412 self._subformat = subtitlesformat
415 def _conver_lang_code(cls, code):
416 """Convert language code from ISO 639-1 to ISO 639-2/T"""
417 return cls._lang_map.get(code[:2])
419 def run(self, information):
420 if information['ext'] != u'mp4':
421 self._downloader.to_screen(u'[ffmpeg] Subtitles can only be embedded in mp4 files')
422 return True, information
423 if not information.get('subtitles'):
424 self._downloader.to_screen(u'[ffmpeg] There aren\'t any subtitles to embed')
425 return True, information
427 sub_langs = [key for key in information['subtitles']]
428 filename = information['filepath']
429 input_files = [filename] + [subtitles_filename(filename, lang, self._subformat) for lang in sub_langs]
431 opts = ['-map', '0:0', '-map', '0:1', '-c:v', 'copy', '-c:a', 'copy']
432 for (i, lang) in enumerate(sub_langs):
433 opts.extend(['-map', '%d:0' % (i+1), '-c:s:%d' % i, 'mov_text'])
434 lang_code = self._conver_lang_code(lang)
435 if lang_code is not None:
436 opts.extend(['-metadata:s:s:%d' % i, 'language=%s' % lang_code])
437 opts.extend(['-f', 'mp4'])
439 temp_filename = filename + u'.temp'
440 self._downloader.to_screen(u'[ffmpeg] Embedding subtitles in \'%s\'' % filename)
441 self.run_ffmpeg_multiple_files(input_files, temp_filename, opts)
442 os.remove(encodeFilename(filename))
443 os.rename(encodeFilename(temp_filename), encodeFilename(filename))
445 return True, information
448 class FFmpegMetadataPP(FFmpegPostProcessor):
451 if info.get('title') is not None:
452 metadata['title'] = info['title']
453 if info.get('upload_date') is not None:
454 metadata['date'] = info['upload_date']
455 if info.get('uploader') is not None:
456 metadata['artist'] = info['uploader']
457 elif info.get('uploader_id') is not None:
458 metadata['artist'] = info['uploader_id']
461 self._downloader.to_screen(u'[ffmpeg] There isn\'t any metadata to add')
464 filename = info['filepath']
465 temp_filename = prepend_extension(filename, 'temp')
467 options = ['-c', 'copy']
468 for (name, value) in metadata.items():
469 options.extend(['-metadata', '%s=%s' % (name, value)])
471 self._downloader.to_screen(u'[ffmpeg] Adding metadata to \'%s\'' % filename)
472 self.run_ffmpeg(filename, temp_filename, options)
473 os.remove(encodeFilename(filename))
474 os.rename(encodeFilename(temp_filename), encodeFilename(filename))
478 class FFmpegMergerPP(FFmpegPostProcessor):
480 filename = info['filepath']
481 args = ['-c', 'copy']
482 self._downloader.to_screen(u'[ffmpeg] Merging formats into "%s"' % filename)
483 self.run_ffmpeg_multiple_files(info['__files_to_merge'], filename, args)