--- /dev/null
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+import os
+import subprocess
+import sys
+import time
+
+from utils import *
+
+
+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.
+
+ When this method returns None, the postprocessing chain is
+ stopped. However, this method may return an information
+ dictionary that will be passed to the next postprocessing
+ object in the chain. It can be the one it received after
+ changing some fields.
+
+ In addition, this method may raise a PostProcessingError
+ exception that will be taken into account by the downloader
+ it was called from.
+ """
+ return information # by default, do nothing
+
+class AudioConversionError(BaseException):
+ def __init__(self, message):
+ self.message = message
+
+class FFmpegExtractAudioPP(PostProcessor):
+ def __init__(self, downloader=None, preferredcodec=None, preferredquality=None, keepvideo=False):
+ PostProcessor.__init__(self, downloader)
+ if preferredcodec is None:
+ preferredcodec = 'best'
+ self._preferredcodec = preferredcodec
+ self._preferredquality = preferredquality
+ self._keepvideo = keepvideo
+ self._exes = self.detect_executables()
+
+ @staticmethod
+ def detect_executables():
+ available = {'avprobe' : False, 'avconv' : False, 'ffmpeg' : False, 'ffprobe' : False}
+ for path in os.environ["PATH"].split(os.pathsep):
+ for program in available.keys():
+ exe_file = os.path.join(path, program)
+ if os.path.isfile(exe_file) and os.access(exe_file, os.X_OK):
+ available[program] = exe_file
+ return available
+
+ def get_audio_codec(self, path):
+ if not self._exes['ffprobe'] and not self._exes['avprobe']: return None
+ try:
+ cmd = [self._exes['avprobe'] or self._exes['ffprobe'], '-show_streams', '--', encodeFilename(path)]
+ handle = subprocess.Popen(cmd, stderr=file(os.path.devnull, 'w'), 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.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]
+ cmd = ([self._exes['avconv'] or self._exes['ffmpeg'], '-y', '-i', encodeFilename(path), '-vn']
+ + acodec_opts + more_opts +
+ ['--', encodeFilename(out_path)])
+ p = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+ stdout,stderr = p.communicate()
+ if p.returncode != 0:
+ msg = stderr.strip().split('\n')[-1]
+ raise AudioConversionError(msg)
+
+ def run(self, information):
+ path = information['filepath']
+
+ filecodec = self.get_audio_codec(path)
+ if filecodec is None:
+ self._downloader.to_stderr(u'WARNING: unable to obtain file audio codec with ffprobe')
+ return None
+
+ more_opts = []
+ if self._preferredcodec == 'best' or self._preferredcodec == filecodec or (self._preferredcodec == 'm4a' and filecodec == 'aac'):
+ if self._preferredcodec == 'm4a' and filecodec == 'aac':
+ # Lossless, but in another container
+ acodec = 'copy'
+ extension = self._preferredcodec
+ more_opts = [self._exes['avconv'] and '-bsf:a' or '-absf', 'aac_adtstoasc']
+ elif filecodec in ['aac', 'mp3', 'vorbis']:
+ # 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:
+ more_opts += [self._exes['avconv'] and '-b:a' or '-ab', self._preferredquality]
+ else:
+ # We convert the audio (lossy)
+ acodec = {'mp3': 'libmp3lame', 'aac': 'aac', 'm4a': 'aac', 'vorbis': 'libvorbis', 'wav': None}[self._preferredcodec]
+ extension = self._preferredcodec
+ more_opts = []
+ if self._preferredquality is not None:
+ more_opts += [self._exes['avconv'] and '-b:a' or '-ab', self._preferredquality]
+ 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
+ self._downloader.to_screen(u'[' + (self._exes['avconv'] and 'avconv' or 'ffmpeg') + '] Destination: ' + new_path)
+ try:
+ self.run_ffmpeg(path, new_path, acodec, more_opts)
+ except:
+ etype,e,tb = sys.exc_info()
+ if isinstance(e, AudioConversionError):
+ self._downloader.to_stderr(u'ERROR: audio conversion failed: ' + e.message)
+ else:
+ self._downloader.to_stderr(u'ERROR: error running ' + (self._exes['avconv'] and 'avconv' or 'ffmpeg'))
+ return None
+
+ # 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.to_stderr(u'WARNING: Cannot update utime of audio file')
+
+ if not self._keepvideo:
+ try:
+ os.remove(encodeFilename(path))
+ except (IOError, OSError):
+ self._downloader.to_stderr(u'WARNING: Unable to remove downloaded video file')
+ return None
+
+ information['filepath'] = new_path
+ return information
Rapsys Git / youtubedl / blobdiff