Python से yt-dlp: embedded API, options, hooks और सर्वर में चलाना

python3 -m pip install -U "yt-dlp[default]"
# साथ में मशीन पर ffmpeg (merge / audio) और Deno जैसा JS runtime (YouTube challenge)

import yt_dlp

opts = {
    "format": "bv*+ba/b",              # best video + best audio, merged (ffmpeg चाहिए)
    "merge_output_format": "mp4",
    "outtmpl": "downloads/%(title)s.%(ext)s",
    "noplaylist": True,
    "quiet": True,
}
with yt_dlp.YoutubeDL(opts) as ydl:
    ydl.download(["https://youtu.be/dQw4w9WgXcQ"])

import yt_dlp

with yt_dlp.YoutubeDL({"quiet": True, "skip_download": True}) as ydl:
    info = ydl.extract_info("https://youtu.be/dQw4w9WgXcQ", download=False)

print(info["title"], info["duration"])
for f in info["formats"]:
    if f.get("vcodec") != "none" and f.get("acodec") != "none":     # progressive (एक file में video+audio)
        print(f["format_id"], f.get("height"), f.get("ext"), f.get("filesize_approx"))
best_audio = max((f for f in info["formats"] if f.get("vcodec") == "none"), key=lambda f: f.get("abr") or 0)
print("audio:", best_audio["format_id"], best_audio["url"][:60], "...")

def on_progress(d):
    if d["status"] == "downloading":
        print(d.get("_percent_str"), d.get("_speed_str"), end="\r")
    elif d["status"] == "finished":
        print("\nहो गया, post-processing:", d["filename"])

class QuietLogger:
    def debug(self, msg): pass
    def warning(self, msg): print("WARN", msg)
    def error(self, msg): print("ERR", msg)

opts = {"progress_hooks": [on_progress], "logger": QuietLogger(), "format": "bv*+ba/b"}

from yt_dlp.utils import DownloadError, ExtractorError

try:
    with yt_dlp.YoutubeDL(opts) as ydl:
        info = ydl.extract_info(url, download=False)
except DownloadError as e:
    msg = str(e)
    if "Sign in to confirm" in msg:      # bot wall → IP/cookies/PO token, bot-check गाइड देखें
        ...
    elif "HTTP Error 403" in msg:       # 403 गाइड देखें
        ...
    elif "Private video" in msg or "Video unavailable" in msg:
        ...
    raise

opts = {
    "cookiefile": "/secrets/cookies.txt",           # Netscape format; सिर्फ़ spare account
    "proxy": "socks5h://user:pass@exit.example:1080",
    "source_address": "0.0.0.0",                    # IPv4 force (-4 flag)
    "extractor_args": {"youtube": {"player_client": ["tv", "web"]}},
    "sleep_interval_requests": 1,
    "retries": 3,
    "socket_timeout": 30,
}

import asyncio
from fastapi import FastAPI

app = FastAPI()
_sem = asyncio.Semaphore(4)   # concurrent extraction सीमित करें — हर एक ≈ 1 s CPU

def _extract(url: str) -> dict:
    with yt_dlp.YoutubeDL({"quiet": True, "skip_download": True}) as ydl:
        return ydl.extract_info(url, download=False)

@app.get("/info")
async def info(url: str):
    async with _sem:
        data = await asyncio.to_thread(_extract, url)   # event loop पर yt-dlp कभी न बुलाएँ
    return {"title": data["title"], "duration": data["duration"]}

FROM python:3.12-slim
RUN apt-get update && apt-get install -y --no-install-recommends ffmpeg curl unzip ca-certificates \
 && rm -rf /var/lib/apt/lists/* \
 && curl -fsSL https://deno.land/install.sh | DENO_INSTALL=/usr/local sh
RUN pip install --no-cache-dir "yt-dlp[default]" fastapi uvicorn
COPY app.py /app/app.py
USER 1000
CMD ["uvicorn", "app:app", "--host", "0.0.0.0", "--port", "8000", "--app-dir", "/app"]