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changed --audio-quality behaviour to support both CBR and VBR

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This commit is contained in:
Filippo Valsorda 2012-07-14 19:43:24 +02:00
parent cca4828ac9
commit b24676ce88
4 changed files with 13 additions and 6 deletions
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5
README.md
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@ -90,8 +90,9 @@ which means you can modify it, redistribute it or use it however you like.
ffmpeg or avconv and ffprobe or avprobe)
--audio-format FORMAT "best", "aac", "vorbis", "mp3", "m4a", or "wav";
best by default
--audio-quality QUALITY ffmpeg/avconv audio bitrate specification, 128k by
default
--audio-quality QUALITY ffmpeg/avconv audio quality specification, insert a
value between 0 (highest) and 9 (lowest) or a
specific bitrate like 128 (default 5)
-k, --keep-video keeps the video file on disk after the post-
processing; the video is erased by default

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youtube-dl
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10
youtube_dl/PostProcessor.py
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@ -142,14 +142,20 @@ class FFmpegExtractAudioPP(PostProcessor):
extension = 'mp3'
more_opts = []
if self._preferredquality is not None:
more_opts += [self._exes['avconv'] and '-b:a' or '-ab', self._preferredquality]
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]
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 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]
if self._preferredcodec == 'aac':
more_opts += ['-f', 'adts']
if self._preferredcodec == 'm4a':

4
youtube_dl/__init__.py
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@ -296,8 +296,8 @@ def parseOpts():
help='convert video files to audio-only files (requires ffmpeg or avconv and ffprobe or avprobe)')
postproc.add_option('--audio-format', metavar='FORMAT', dest='audioformat', default='best',
help='"best", "aac", "vorbis", "mp3", "m4a", or "wav"; best by default')
postproc.add_option('--audio-quality', metavar='QUALITY', dest='audioquality', default='128K',
help='ffmpeg/avconv audio bitrate specification, 128k by default')
postproc.add_option('--audio-quality', metavar='QUALITY', dest='audioquality', default='5',
help='ffmpeg/avconv audio quality specification, insert a value between 0 (highest) and 9 (lowest) or a specific bitrate like 128 (default 5)')
postproc.add_option('-k', '--keep-video', action='store_true', dest='keepvideo', default=False,
help='keeps the video file on disk after the post-processing; the video is erased by default')