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https://github.com/KevinMidboe/spotify-downloader.git
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debe7ee902
If `must_exists` is `False` when intializing `EncoderFFmpeg()`, skip skip checking whether the FFmpeg binary exists. Fixes #722.
113 lines
3.7 KiB
Python
113 lines
3.7 KiB
Python
import subprocess
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import os
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from spotdl.encode import EncoderBase
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from spotdl.encode.exceptions import EncoderNotFoundError
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from spotdl.encode.exceptions import FFmpegNotFoundError
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import logging
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logger = logging.getLogger(__name__)
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# Key: from format
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# Subkey: to format
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RULES = {
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"m4a": {
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"mp3": "-codec:v copy -codec:a libmp3lame -ar 48000",
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"opus": "-codec:a libopus -vbr on",
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"m4a": "-acodec copy",
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"flac": "-codec:a flac -ar 48000",
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},
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"opus": {
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"mp3": "-codec:a libmp3lame -ar 48000",
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"m4a": "-cutoff 20000 -codec:a aac -ar 48000",
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"flac": "-codec:a flac -ar 48000",
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},
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}
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class EncoderFFmpeg(EncoderBase):
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def __init__(self, encoder_path="ffmpeg", must_exist=True):
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_loglevel = "-hide_banner -nostats -v panic"
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_additional_arguments = ["-b:a", "192k", "-vn"]
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try:
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super().__init__(encoder_path, must_exist, _loglevel, _additional_arguments)
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except EncoderNotFoundError as e:
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raise FFmpegNotFoundError(e.args[0])
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self._rules = RULES
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def set_trim_silence(self):
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self.set_argument("-af silenceremove=start_periods=1")
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def get_encoding(self, path):
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return super().get_encoding(path)
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def _generate_encoding_arguments(self, input_encoding, target_encoding):
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initial_arguments = self._rules.get(input_encoding)
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if initial_arguments is None:
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raise TypeError(
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'The input format ("{}") is not supported.'.format(
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input_encoding,
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))
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arguments = initial_arguments.get(target_encoding)
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if arguments is None:
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raise TypeError(
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'The output format ("{}") is not supported.'.format(
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target_encoding,
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))
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return arguments
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def set_debuglog(self):
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self._loglevel = "-loglevel debug"
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def _generate_encode_command(self, input_path, target_file,
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input_encoding=None, target_encoding=None):
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if input_encoding is None:
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input_encoding = self.get_encoding(input_path)
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if target_encoding is None:
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target_encoding = self.get_encoding(target_file)
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arguments = self._generate_encoding_arguments(
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input_encoding,
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target_encoding
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)
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command = [self.encoder_path] \
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+ ["-y", "-nostdin"] \
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+ self._loglevel.split() \
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+ ["-i", input_path] \
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+ arguments.split() \
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+ self._additional_arguments \
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+ ["-f", self.target_format_from_encoding(target_encoding)] \
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+ [target_file]
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return command
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def re_encode(self, input_path, target_file, target_encoding=None, delete_original=False):
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encode_command = self._generate_encode_command(
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input_path,
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target_file,
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target_encoding=target_encoding
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)
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logger.debug("Calling FFmpeg with:\n{command}".format(
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command=encode_command,
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))
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process = subprocess.Popen(encode_command)
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process.wait()
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encode_successful = process.returncode == 0
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if encode_successful and delete_original:
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os.remove(input_path)
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return process
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def re_encode_from_stdin(self, input_encoding, target_file, target_encoding=None):
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encode_command = self._generate_encode_command(
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"-",
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target_file,
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input_encoding=input_encoding,
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target_encoding=target_encoding,
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)
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logger.debug("Calling FFmpeg with:\n{command}".format(
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command=encode_command,
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))
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process = subprocess.Popen(encode_command, stdin=subprocess.PIPE)
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return process
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