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56 lines
1.6 KiB
Python
56 lines
1.6 KiB
Python
import httpx
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import yt_dlp
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def extract_video_id(url: str) -> str:
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"""YouTube URL에서 video ID 추출."""
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if "youtu.be/" in url:
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return url.split("youtu.be/")[1].split("?")[0]
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if "v=" in url:
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return url.split("v=")[1].split("&")[0]
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raise ValueError(f"유효하지 않은 YouTube URL: {url}")
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def fetch_transcript(video_id: str) -> str:
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"""yt-dlp로 YouTube 자동생성 자막을 텍스트로 추출."""
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url = f"https://www.youtube.com/watch?v={video_id}"
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ydl_opts = {
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"skip_download": True,
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"writeautomaticsub": True,
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"subtitleslangs": ["ko", "en"],
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"subtitlesformat": "json3",
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"quiet": True,
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"no_warnings": True,
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}
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with yt_dlp.YoutubeDL(ydl_opts) as ydl:
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info = ydl.extract_info(url, download=False)
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subs = info.get("automatic_captions", {})
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lang = "ko" if "ko" in subs else "en" if "en" in subs else None
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if not lang:
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raise ValueError(f"자막을 찾을 수 없습니다: {video_id}")
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sub_url = None
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for fmt in subs[lang]:
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if fmt["ext"] == "json3":
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sub_url = fmt["url"]
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break
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if not sub_url:
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raise ValueError(f"json3 자막 포맷을 찾을 수 없습니다: {video_id}")
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resp = httpx.get(sub_url)
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resp.raise_for_status()
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data = resp.json()
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texts = []
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for event in data.get("events", []):
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for seg in event.get("segs", []):
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text = seg.get("utf8", "").strip()
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if text and text != "\n":
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texts.append(text)
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return " ".join(texts)
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