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Update PostProcessor.py

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Added option to set channels for audio extraction. Audio quality also supports sample rate integers.
This commit is contained in:
David 2013-08-20 08:41:16 -07:00
parent 8ba6683cd7
commit 871fd35d57
1 changed files with 9 additions and 3 deletions
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12
youtube_dl/PostProcessor.py
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@ -91,13 +91,14 @@ class FFmpegPostProcessor(PostProcessor):
return fn
class FFmpegExtractAudioPP(FFmpegPostProcessor):
def __init__(self, downloader=None, preferredcodec=None, preferredquality=None, nopostoverwrites=False):
def __init__(self, downloader=None, preferredcodec=None, preferredquality=None, preferredchannels=None, nopostoverwrites=False):
FFmpegPostProcessor.__init__(self, downloader)
if preferredcodec is None:
preferredcodec = 'best'
self._preferredcodec = preferredcodec
self._preferredquality = preferredquality
self._nopostoverwrites = nopostoverwrites
self._preferredchannels = preferredchannels
def get_audio_codec(self, path):
if not self._exes['ffprobe'] and not self._exes['avprobe']:
@ -163,6 +164,8 @@ class FFmpegExtractAudioPP(FFmpegPostProcessor):
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._preferredchannels is not None:
more_opts += ['-ac', self._preferredchannels]
else:
# We convert the audio (lossy)
acodec = {'mp3': 'libmp3lame', 'aac': 'aac', 'm4a': 'aac', 'opus': 'opus', 'vorbis': 'libvorbis', 'wav': None}[self._preferredcodec]
@ -171,8 +174,10 @@ class FFmpegExtractAudioPP(FFmpegPostProcessor):
if self._preferredquality is not None:
if int(self._preferredquality) < 10:
more_opts += [self._exes['avconv'] and '-q:a' or '-aq', self._preferredquality]
else:
elif int(self._preferredquality) < 8000:
more_opts += [self._exes['avconv'] and '-b:a' or '-ab', self._preferredquality + 'k']
else:
more_opts += [self._exes['avconv'] and '-ar', self._preferredquality]
if self._preferredcodec == 'aac':
more_opts += ['-f', 'adts']
if self._preferredcodec == 'm4a':
@ -182,7 +187,8 @@ class FFmpegExtractAudioPP(FFmpegPostProcessor):
if self._preferredcodec == 'wav':
extension = 'wav'
more_opts += ['-f', 'wav']
if self._preferredchannels is not None:
more_opts += ['-ac', self._preferredchannels]
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