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#!/usr/bin/python3 |
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import logging |
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import subprocess |
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import tempfile |
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import time |
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from music_album_creation.tracks_parsing import StringParser |
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logger = logging.getLogger(__name__) |
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class AudioSegmenter: |
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args = ['ffmpeg', '-i', '-acodec', 'copy', '-ss'] |
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def __init__(self, target_directory=tempfile.gettempdir()): |
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self._dir = target_directory |
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@property |
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def target_directory(self): |
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"""The directory path that will serve as the destination for storing created tracks""" |
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return self._dir |
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@target_directory.setter |
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def target_directory(self, directory_path): |
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self._dir = directory_path |
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def segment_from_list(self, album_file, data, supress_stdout=True, supress_stderr=True, verbose=False, sleep_seconds=0): |
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""" |
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Given an album audio file and data structure with tracks information, segments the audio file into audio tracks which get stored in the 'self.target_directory' folder.\n |
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:param str album_file: |
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:param list data: list of lists. Each inner list must have 2 elements: track name and starting timestamp in hh:mm:ss |
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:param bool supress_stdout: |
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:param bool supress_stderr: |
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:param bool verbose: |
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:param float sleep_seconds: |
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:return: full paths to audio tracks |
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""" |
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# if not re.search('0:00', data[0][1]): |
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# raise NotStartingFromZeroTimestampError("First track ({}) is supposed to have a 0:00 timestamp. Instead {} found".format(data[0][0], data[0][1])) |
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exit_code = 0 |
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data = StringParser.convert_tracks_data(data, album_file, target_directory=self._dir) |
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audio_file_paths = [x[0] for x in data] |
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i = 0 |
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while exit_code == 0 and i < len(data) - 1: |
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time.sleep(sleep_seconds) |
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exit_code = self._segment(album_file, *data[i], supress_stdout=supress_stdout, supress_stderr=supress_stderr) |
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i += 1 |
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if exit_code != 0: |
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raise FfmpegCommandError("Command '{}' failed".format(' '.join(self._args))) |
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exit_code = self._segment(album_file, *data[-1], supress_stdout=supress_stdout, supress_stderr=supress_stderr) |
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if exit_code != 0: |
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raise FfmpegCommandError("Command '{}' failed".format(' '.join(self._args))) |
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return audio_file_paths |
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def segment_from_file(self, album_file, tracks_file, supress_stdout=True, supress_stderr=True, verbose=False, sleep_seconds=0.45): |
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""" |
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Given an album audio file and a file with track information, segments the audio file into audio tracks which get stored in the 'self.target_directory' folder.\n |
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:param str album_file: |
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:param str tracks_file: |
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:param bool supress_stdout: |
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:param bool supress_stderr: |
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:param bool verbose: |
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:param float sleep_seconds: |
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:return: |
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""" |
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with open(tracks_file, 'r') as f: |
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list_of_lists = StringParser.parse_hhmmss_string(f.read().strip()) |
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self.segment_from_list(album_file, list_of_lists, supress_stdout=supress_stdout, supress_stderr=supress_stderr, verbose=verbose, sleep_seconds=sleep_seconds) |
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def _segment(self, *args, supress_stdout=True, supress_stderr=True, verbose=False): |
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album_file = args[0] |
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track_file = args[1] |
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start = args[2] |
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end = None |
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if 3 < len(args): |
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end = args[3] |
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self._args = self.args[:2] + ['{}'.format(album_file)] + self.args[2:] + [start] + (lambda: ['-to', str(end)] if end else [])() + ['{}'.format(track_file)] |
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logger.info("Segmenting: '{}'".format(' '.join(self._args))) |
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ro = subprocess.run(self._args, **self.__std_parameters(supress_stdout, supress_stderr)) |
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return ro.returncode |
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@classmethod |
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def __std_parameters(cls, std_out_flag, std_error_flag): |
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"""If an input flag is True then the stream (either 'out' or 'err') can be obtained ie obj = subprocess.run(..); str(obj.stdout, encoding='utf-8')).\n |
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If an input flag is False then the stream will be normally outputted; ie at the terminal""" |
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return {v: subprocess.PIPE for k, v in zip([std_out_flag, std_error_flag], ['stdout', 'stderr']) if k} |
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class FfmpegCommandError(Exception): pass |
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if __name__ == '__main__': |
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import sys |
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if len(sys.argv) < 3: |
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print('Usage: python3 Album_segmentation.py AUDIO_FILE TRACKS_FILE') |
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sys.exit(1) |
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try: |
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audio_segmenter = AudioSegmenter() |
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audio_segmenter.segment_from_file(sys.argv[1], sys.argv[2], supress_stdout=True, supress_stderr=True, verbose=True, sleep_seconds=0.45) |
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except Exception as e: |
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print(e) |
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sys.exit(1) |
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boromir674 /
music-album-creator
