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import logging |
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import os |
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import tempfile |
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import time |
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from typing import List, Optional |
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from music_album_creation.ffmpeg import FFMPEG |
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from .data import SegmentationInformation |
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logger = logging.getLogger(__name__) |
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ffmpeg = FFMPEG(os.environ.get('MUSIC_FFMPEG', 'ffmpeg')) |
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EXT = 'mp3' |
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class AudioSegmenter(object): |
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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 _trans(self, track_info): |
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"""Create (file) name of output track.""" |
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return [os.path.join(self._dir, f'{track_info[0]}.{EXT}')] + track_info[1:] |
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def segment(self, album_file, data, sleep_seconds=0): |
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""" |
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:param album_file: |
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:param data: |
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:param supress_stdout: |
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:param supress_stderr: |
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:param float sleep_seconds: |
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:return: |
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""" |
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exit_code = 0 |
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i = 0 |
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track_files: List[str] = [] |
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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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result = self._segment( |
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album_file, |
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*self._trans(list(data[i])), |
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) |
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if result.exit_code != 0: |
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logger.error("Fmmpeg exit code: %s", result.exit_code) |
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logger.error("Ffmpeg st out: %s", result.stdout) |
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logger.error("Fmmpeg stderr: %s", result.stderr) |
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raise FfmpegCommandError("Command '{}' failed".format(' '.join(self._args))) |
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track_files.append(list(data[i])[1]) |
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i += 1 |
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result = self._segment( |
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album_file, |
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*self._trans(list(data[-1])), |
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) |
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if result.exit_code != 0: |
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logger.error("Fmmpeg exit code: %s", result.exit_code) |
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logger.error("Ffmpeg st out: %s", result.stdout) |
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logger.error("Fmmpeg stderr: %s", result.stderr) |
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raise FfmpegCommandError("Command '{}' failed".format(' '.join(self._args))) |
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# TODO: remove the need to hard-code extension. should know from download module |
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# if we download youtube video as mp4 audio, then each track should probably be mp4 too |
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# if we download youtube video as mp3 audio, then each track should probably be mp3 too |
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return [os.path.join(self._dir, f'{list(x)[0]}.{EXT}') for x in data] |
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def segment_from_file( |
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self, |
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album_file, |
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tracks_file, |
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hhmmss_type, |
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supress_stdout=True, |
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supress_stderr=True, |
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sleep_seconds=0, |
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): |
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""" |
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Assumes the hhmmss are starting timestamps. 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 str hhmmss_type: |
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:param bool supress_stdout: |
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:param bool supress_stderr: |
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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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segmentation_info = SegmentationInformation.from_multiline( |
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f.read().strip(), hhmmss_type |
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) |
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return self.segment( |
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album_file, |
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segmentation_info, |
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supress_stdout=supress_stdout, |
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supress_stderr=supress_stderr, |
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sleep_seconds=sleep_seconds, |
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) |
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def _segment(self, *args, **kwargs): |
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album_file = args[0] |
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track_file = args[1] |
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start = args[2] # starting timestamp |
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end: Optional[str] = None # end timestamp |
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# if it is the last segment then end timestamp is the end of the album |
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# and in that case the client code need to supply 3 arguments (not 4) |
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if 3 < len(args): |
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end = args[3] |
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# args = ['ffmpeg', '-y', '-i', '-acodec', 'copy', '-ss'] |
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# self._args = args[:3] + ['{}'.format(album_file)] + args[3:] + [start] + (lambda: ['-to', str(end)] if end else [])() + ['{}'.format(track_file)] |
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# COPY web stream as it is (no custom encododing) |
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# so cannot change the file extension to store |
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# output extension is better kept to be guessed by ffmpeg from the input file |
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self._args = ( |
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'-y', |
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'-i', |
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str(album_file), # youtube downloaded audio steam (ie local mp4 file) |
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# '-acodec', |
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# 'copy', |
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# 'AAC', |
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# '-c:a', |
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# 'libmp3lame', |
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# '-qscale:a', |
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# '9', # max quality |
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# '-ab', |
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# '133k', |
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'-ss', |
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start, |
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*list((lambda: ['-to', str(end)] if end else [])()), |
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'-f', |
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'mp3', |
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str(track_file), |
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) |
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# self._args = ( |
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# '-y', |
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# '-i', |
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# str(album_file), # youtube downloaded audio steam (ie local mp4 file) |
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# '-acodec', |
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# 'copy', |
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# '-ss', |
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# start, |
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# *list((lambda: ['-to', str(end)] if end else [])()), |
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# str(track_file).replace('mp4', 'mp3'), |
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# ) |
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logger.info("Segmenting: ffmpeg '{}'".format(' '.join(self._args))) |
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return ffmpeg( |
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*self._args, |
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) |
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class FfmpegCommandError(Exception): |
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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( |
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sys.argv[1], |
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sys.argv[2], |
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supress_stdout=True, |
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supress_stderr=True, |
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verbose=True, |
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sleep_seconds=0.45, |
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) |
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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
