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54 lines
1.3 KiB
Python
54 lines
1.3 KiB
Python
import subprocess
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from pathlib import Path
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import math
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MAX_SIZE = 49 * 1024 * 1024 # 49 MB safety margin
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def get_duration_seconds(file_path: Path) -> float:
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cmd = [
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"ffprobe",
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"-v", "error",
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"-show_entries", "format=duration",
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"-of", "default=noprint_wrappers=1:nokey=1",
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str(file_path)
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]
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return float(subprocess.check_output(cmd).decode().strip())
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def split_audio(file_path: Path):
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size = file_path.stat().st_size
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if size <= MAX_SIZE:
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return [file_path]
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existing = sorted(file_path.parent.glob(f"{file_path.stem}_part*.mp3"))
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if existing:
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return existing
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duration = get_duration_seconds(file_path)
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parts_count = math.ceil(size / MAX_SIZE)
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part_duration = duration / parts_count
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output_files = []
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for i in range(parts_count):
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start = i * part_duration
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output = file_path.with_name(f"{file_path.stem}_part{i+1}.mp3")
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cmd = [
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"ffmpeg",
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"-y",
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"-i", str(file_path),
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"-ss", str(start),
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"-t", str(part_duration),
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"-acodec", "copy",
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str(output)
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]
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subprocess.run(cmd, stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL)
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output_files.append(output)
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return output_files
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