mirror of
https://github.com/KevinMidboe/spotify-downloader.git
synced 2025-10-29 18:00:15 +00:00
83 lines
2.6 KiB
Python
83 lines
2.6 KiB
Python
import subprocess
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import os
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from core.const import log
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"""What are the differences and similarities between ffmpeg, libav, and avconv?
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https://stackoverflow.com/questions/9477115
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ffmeg encoders high to lower quality
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libopus > libvorbis >= libfdk_aac > aac > libmp3lame
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libfdk_aac due to copyrights needs to be compiled by end user
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on MacOS brew install ffmpeg --with-fdk-aac will do just that. Other OS?
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https://trac.ffmpeg.org/wiki/Encode/AAC
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"""
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def song(input_song, output_song, folder, avconv=False):
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""" Do the audio format conversion. """
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if input_song == output_song:
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return 0
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convert = Converter(input_song, output_song, folder)
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log.info('Converting {0} to {1}'.format(
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input_song, output_song.split('.')[-1]))
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if avconv:
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exit_code = convert.with_avconv()
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else:
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exit_code = convert.with_ffmpeg()
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return exit_code
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class Converter:
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def __init__(self, input_song, output_song, folder):
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self.input_file = os.path.join(folder, input_song)
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self.output_file = os.path.join(folder, output_song)
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def with_avconv(self):
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if log.level == 10:
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level = 'debug'
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else:
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level = '0'
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command = ['avconv', '-loglevel', level, '-i',
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self.input_file, '-ab', '192k',
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self.output_file, '-y']
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log.debug(command)
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return subprocess.call(command)
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def with_ffmpeg(self):
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ffmpeg_pre = 'ffmpeg -y '
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if not log.level == 10:
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ffmpeg_pre += '-hide_banner -nostats -v panic '
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_, input_ext = os.path.splitext(self.input_file)
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_, output_ext = os.path.splitext(self.output_file)
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ffmpeg_params = ''
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if input_ext == '.m4a':
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if output_ext == '.mp3':
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ffmpeg_params = '-codec:v copy -codec:a libmp3lame -ar 44100 '
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elif output_ext == '.webm':
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ffmpeg_params = '-codec:a libopus -vbr on '
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elif input_ext == '.webm':
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if output_ext == '.mp3':
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ffmpeg_params = '-codec:a libmp3lame -ar 44100 '
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elif output_ext == '.m4a':
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ffmpeg_params = '-cutoff 20000 -codec:a libfdk_aac -ar 44100 '
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if output_ext == '.flac':
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ffmpeg_params = '-codec:a flac -ar 44100 '
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# add common params for any of the above combination
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ffmpeg_params += '-b:a 192k -vn '
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ffmpeg_pre += ' -i'
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command = ffmpeg_pre.split() + [self.input_file] + ffmpeg_params.split() + [self.output_file]
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log.debug(command)
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return subprocess.call(command)
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