mirror of
https://github.com/KevinMidboe/spotify-downloader.git
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4a2bbb2535
* Expect python to already be in PATH * Expect python to be in PATH * Fix special handlling of conversion on windows * Some cleaning * Update docs
69 lines
2.3 KiB
Python
69 lines
2.3 KiB
Python
import subprocess
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import os
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"""
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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, verbose=False):
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"""Do the audio format conversion."""
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if not input_song == output_song:
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print('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(input_song, output_song, folder, verbose)
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else:
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exit_code = convert_with_ffmpeg(input_song, output_song, folder, verbose)
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return exit_code
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return 0
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def convert_with_avconv(input_song, output_song, folder, verbose):
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"""Convert the audio file using avconv."""
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if verbose:
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level = 'debug'
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else:
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level = '0'
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command = ['avconv',
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'-loglevel', level,
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'-i', os.path.join(folder, input_song),
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'-ab', '192k',
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os.path.join(folder, output_song)]
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return subprocess.call(command)
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def convert_with_ffmpeg(input_song, output_song, folder, verbose):
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"""Convert the audio file using FFmpeg."""
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ffmpeg_pre = 'ffmpeg -y '
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if not verbose:
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ffmpeg_pre += '-hide_banner -nostats -v panic '
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input_ext = input_song.split('.')[-1]
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output_ext = output_song.split('.')[-1]
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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 -q:a 2 '
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elif output_ext == 'webm':
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ffmpeg_params = '-c:a libopus -vbr on -b:a 192k -vn '
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elif input_ext == 'webm':
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if output_ext == 'mp3':
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ffmpeg_params = ' -ab 192k -ar 44100 -vn '
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elif output_ext == 'm4a':
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ffmpeg_params = '-cutoff 20000 -c:a libfdk_aac -b:a 192k -vn '
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command = '{0}-i {1} {2}{3}'.format(
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ffmpeg_pre, os.path.join(folder, input_song), ffmpeg_params, os.path.join(folder, output_song)).split(' ')
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return subprocess.call(command)
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