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Merge 5831f6feef into 4d05f84325

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d3fault 2024-06-27 06:36:06 +08:00 committed by GitHub
commit 0e3f7325b4
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1 changed files with 11 additions and 3 deletions
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14
youtube_dl/postprocessor/ffmpeg.py
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@ -22,6 +22,7 @@ from ..utils import (
dfxp2srt,
ISO639Utils,
replace_extension,
compat_str,
)
@ -300,9 +301,16 @@ class FFmpegExtractAudioPP(FFmpegPostProcessor):
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 += ['-q:a', self._preferredquality]
if int(self._preferredquality) < 10:
if extension == 'opus':
# The opus codec doesn't support the -q:a option
# Magic number of 24 used to give quality numbers 0-9 *some* meaning (as suggested by "knarrff" on Github)
# 0 (best quality) gives 210 kb/s
# 5 (default) gives 96 kb/s
# 9 (worst quality) gives 6 kb/s, which is the opus minimum (and 0 kb/s wouldn't make any sense)
more_opts += ['-b:a', compat_str(max(6, int((9 - int(self._preferredquality)) * 24))) + 'k']
else:
more_opts += ['-q:a', self._preferredquality]
else:
more_opts += ['-b:a', self._preferredquality + 'k']
if self._preferredcodec == 'aac':