57 lines
1.2 KiB
Python
57 lines
1.2 KiB
Python
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import re
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from pathlib import Path
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from typing import Optional
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from .utils import run_
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def _ffmpeg(*args, **kwargs):
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return run_(
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"ffmpeg",
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*args,
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"-f",
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"null",
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"/dev/null",
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"-hide_banner",
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"-nostats",
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**kwargs,
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)
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def _ffprobe(*args, **kwargs):
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return run_("ffprobe", *args, **kwargs)
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_PROBE_REPLAYGAIN_RE = re.compile(
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r".*REPLAYGAIN_TRACK_GAIN: ([-+]?[0-9]+\.[0-9]+) dB.*",
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)
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def probe_replaygain(filepath: Path) -> Optional[float]:
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"""
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Probe replaygain will probe the given audio file and return the replaygain if available.
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"""
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cmd = _ffprobe("-i", filepath)
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track_gain_match = _PROBE_REPLAYGAIN_RE.search(cmd.stderr)
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if track_gain_match:
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return float(track_gain_match.group(1))
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_COMPUTE_REPLAYGAIN_RE = re.compile(
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r".* track_gain = ([-+]?[0-9]+\.[0-9]+) dB.*",
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)
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def compute_replaygain(filepath: Path) -> Optional[float]:
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"""
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Compute replaygain will analyse the given audio file and return the replaygain if available.
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"""
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cmd = _ffmpeg("-i", filepath, "-vn", "-filter", "replaygain")
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track_gain_match = _COMPUTE_REPLAYGAIN_RE.search(cmd.stderr)
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if track_gain_match:
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return float(track_gain_match.group(1))
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