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| #!/usr/bin/env python3
"""YouTube URL을 입력받아 MP3로 다운로드하는 스탠드얼론 스크립트.
사용법:
python download_mp3.py <URL>
python download_mp3.py <URL> -o ~/Music
"""
from __future__ import annotations
import re
import sys
from pathlib import Path
import yt_dlp
PROGRESS_RE = re.compile(r"(\d+(?:\.\d+)?)%")
MP3_QUALITY = "320"
def _parse_percent(data: dict) -> float:
percent_str = data.get("_percent_str")
if isinstance(percent_str, str):
match = PROGRESS_RE.search(percent_str)
if match:
return float(match.group(1))
downloaded = data.get("downloaded_bytes")
total = data.get("total_bytes") or data.get("total_bytes_estimate")
if isinstance(downloaded, int) and isinstance(total, int) and total > 0:
return (downloaded / total) * 100
return 0.0
def download_mp3(url: str, output_dir: Path, quality: str = MP3_QUALITY, normalize: bool = True) -> Path:
output_dir.mkdir(parents=True, exist_ok=True)
def hook(data: dict) -> None:
status = data.get("status")
if status == "downloading":
percent = _parse_percent(data)
print(f"\r다운로드 중... {percent:.1f}%", end="", flush=True)
elif status == "finished":
print("\r변환 중... ", flush=True)
elif status == "postprocess":
print("MP3 변환 중...", flush=True)
ydl_opts = {
"format": "bestaudio/best",
"outtmpl": str(output_dir / "%(title)s.%(ext)s"),
"postprocessors": [
{
"key": "FFmpegExtractAudio",
"preferredcodec": "mp3",
"preferredquality": quality,
}
],
"progress_hooks": [hook],
"quiet": True,
"no_warnings": True,
}
if normalize:
ydl_opts["postprocessor_args"] = ["-af", "loudnorm=I=-14:LRA=11:TP=-1.5"]
with yt_dlp.YoutubeDL(ydl_opts) as ydl:
info = ydl.extract_info(url, download=False)
title = info.get("title", "알 수 없음") if isinstance(info, dict) else "알 수 없음"
print(f"제목: {title}")
info = ydl.extract_info(url, download=True)
output_path: str | None = None
if isinstance(info, dict):
downloads = info.get("requested_downloads")
if isinstance(downloads, list) and downloads:
output_path = downloads[0].get("filepath") or downloads[0].get("_filename")
if not output_path:
output_path = info.get("_filename")
if not output_path:
raise RuntimeError("다운로드된 파일을 찾을 수 없습니다.")
mp3_path = Path(output_path).with_suffix(".mp3")
print(f"\n완료: {mp3_path}")
return mp3_path
QUALITY_OPTIONS = ["320", "256", "192", "128"]
def _ask_url() -> str:
while True:
url = input("YouTube URL: ").strip()
if url.startswith("http://") or url.startswith("https://"):
return url
print("올바른 URL을 입력하세요 (http:// 또는 https://로 시작).")
def _ask_quality() -> str:
print("\n비트레이트를 선택하세요:")
for i, q in enumerate(QUALITY_OPTIONS, 1):
default_mark = " (기본값)" if q == MP3_QUALITY else ""
print(f" {i}. {q}kbps{default_mark}")
while True:
choice = input(f"선택 [1-{len(QUALITY_OPTIONS)}] (기본값: {len(QUALITY_OPTIONS)}): ").strip()
if choice == "":
return MP3_QUALITY
if choice.isdigit() and 1 <= int(choice) <= len(QUALITY_OPTIONS):
return QUALITY_OPTIONS[int(choice) - 1]
print(f"1에서 {len(QUALITY_OPTIONS)} 사이의 숫자를 입력하세요.")
def _ask_normalize() -> bool:
while True:
choice = input("\n음량 정규화를 적용하시겠습니까? [Y/n]: ").strip().lower()
if choice in ("", "y", "yes"):
return True
if choice in ("n", "no"):
return False
print("y 또는 n을 입력하세요.")
def main() -> None:
print("=== YouTube MP3 다운로더 ===\n")
try:
url = _ask_url()
quality = _ask_quality()
normalize = _ask_normalize()
output_dir = Path(".").resolve()
print()
download_mp3(url, output_dir, quality=quality, normalize=normalize)
except KeyboardInterrupt:
print("\n취소되었습니다.")
sys.exit(1)
except Exception as e:
print(f"\n오류: {e}", file=sys.stderr)
sys.exit(1)
if __name__ == "__main__":
main()
|
