mirror of
https://github.com/KevinMidboe/spotify-downloader.git
synced 2025-10-29 18:00:15 +00:00
154 lines
4.8 KiB
Python
154 lines
4.8 KiB
Python
import subprocess
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import os
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from logzero import logger as log
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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, trim_silence=False):
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""" Do the audio format conversion. """
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if avconv and trim_silence:
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raise ValueError("avconv does not support trim_silence")
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if not input_song == output_song:
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log.info("Converting {0} to {1}".format(input_song, output_song.split(".")[-1]))
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elif input_song.endswith(".m4a"):
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log.info('Correcting container in "{}"'.format(input_song))
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else:
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return 0
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convert = Converter(input_song, output_song, folder, delete_original=True)
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if avconv:
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exit_code, command = convert.with_avconv()
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else:
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exit_code, command = convert.with_ffmpeg(trim_silence=trim_silence)
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return exit_code, command
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class Converter:
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def __init__(self, input_song, output_song, folder, delete_original):
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_, self.input_ext = os.path.splitext(input_song)
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_, self.output_ext = os.path.splitext(output_song)
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self.output_file = os.path.join(folder, output_song)
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rename_to_temp = False
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same_file = os.path.abspath(input_song) == os.path.abspath(output_song)
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if same_file:
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# FFmpeg/avconv cannot have the same file for both input and output
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# This would happen when the extensions are same, so rename
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# the input track to append ".temp"
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log.debug(
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'Input file and output file are going will be same during encoding, will append ".temp" to input file just before starting encoding to avoid conflict'
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)
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input_song = output_song + ".temp"
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rename_to_temp = True
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delete_original = True
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self.input_file = os.path.join(folder, input_song)
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self.rename_to_temp = rename_to_temp
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self.delete_original = delete_original
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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 = [
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"avconv",
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"-loglevel",
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level,
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"-i",
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self.input_file,
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"-ab",
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"192k",
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self.output_file,
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"-y",
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]
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if self.rename_to_temp:
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os.rename(self.output_file, self.input_file)
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log.debug(command)
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try:
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code = subprocess.call(command)
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except FileNotFoundError:
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if self.rename_to_temp:
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os.rename(self.input_file, self.output_file)
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raise
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if self.delete_original:
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log.debug('Removing original file: "{}"'.format(self.input_file))
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os.remove(self.input_file)
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return code, command
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def with_ffmpeg(self, trim_silence=False):
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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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ffmpeg_params = ""
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if self.input_ext == ".m4a":
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if self.output_ext == ".mp3":
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ffmpeg_params = "-codec:v copy -codec:a libmp3lame -ar 44100 "
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elif self.output_ext == ".webm":
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ffmpeg_params = "-codec:a libopus -vbr on "
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elif self.output_ext == ".m4a":
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ffmpeg_params = "-acodec copy "
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elif self.input_ext == ".webm":
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if self.output_ext == ".mp3":
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ffmpeg_params = "-codec:a libmp3lame -ar 44100 "
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elif self.output_ext == ".m4a":
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ffmpeg_params = "-cutoff 20000 -codec:a aac -ar 44100 "
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if self.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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if trim_silence:
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ffmpeg_params += "-af silenceremove=start_periods=1 "
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command = (
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ffmpeg_pre.split()
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+ [self.input_file]
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+ ffmpeg_params.split()
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+ [self.output_file]
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)
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if self.rename_to_temp:
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os.rename(self.output_file, self.input_file)
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log.debug(command)
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try:
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code = subprocess.call(command)
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except FileNotFoundError:
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if self.rename_to_temp:
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os.rename(self.input_file, self.output_file)
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raise
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if self.delete_original:
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log.debug('Removing original file: "{}"'.format(self.input_file))
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os.remove(self.input_file)
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return code, command
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