47 lines
1.5 KiB
Python
Executable File
47 lines
1.5 KiB
Python
Executable File
#!/usr/bin/env python
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from pydub import AudioSegment
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def fade_point(audio_segment, fade_threshold=-12, chunk_size=10):
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"""
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Returns the millisecond/index of the point where the fade is down to
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fade_threshold and doesn't get louder again.
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audio_segment - the sdlg_search_database_uiegment to find silence in
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fade_threshold - the upper bound for how quiet is silent in dFBS
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chunk_size - chunk size for interating over the segment in ms
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"""
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assert chunk_size > 0 # to avoid infinite loop
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segment_length = audio_segment.duration_seconds * 1000 # ms
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print(f"segment_length={int(segment_length/1000)}")
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trim_ms = segment_length - chunk_size
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max_vol = audio_segment.dBFS
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print(f"{max_vol=}")
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fade_threshold = max_vol
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while (
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audio_segment[trim_ms : trim_ms + chunk_size].dBFS < fade_threshold
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and trim_ms > 0
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): # noqa W503
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trim_ms -= chunk_size
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# if there is no trailing silence, return lenght of track (it's less
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# the chunk_size, but for chunk_size = 10ms, this may be ignored)
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print(f"Fade last {int(segment_length - trim_ms)/1000} seconds")
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# print("Shout:")
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# segment = AudioSegment.from_mp3("../archive/shout.mp3")
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# fade_point(segment)
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# print("Champagne:")
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# segment = AudioSegment.from_mp3("../archive/champ.mp3")
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# fade_point(segment)
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# print("Be good:")
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# segment = AudioSegment.from_mp3("../archive/wibg.mp3")
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# fade_point(segment)
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print("Be good:")
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segment = AudioSegment.from_file("/tmp/bia.flac", "flac")
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fade_point(segment)
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