import os
import yt_dlp

def download_video(url, save_dir="/home/docker/openlist/ytb-video"):
    os.makedirs(save_dir, exist_ok=True)

    base_opts = {
        'merge_output_format': 'mp4',
        'outtmpl': f'{save_dir}/%(title)s.%(ext)s',
        'quiet': False,
        'verbose': True,                  # 调试模式
        'retries': 5,
        'fragment_retries': 5,
    }

    # 首选格式组合
    formats = [
        'bestvideo[ext=mp4]+bestaudio[ext=m4a]/best[ext=mp4]/best',
        'bestvideo+bestaudio/best'
    ]

    for fmt in formats:
        opts = dict(base_opts)
        opts['format'] = fmt
        print(f"🔧 尝试格式: {fmt}")
        try:
            with yt_dlp.YoutubeDL(opts) as ydl:
                info = ydl.extract_info(url, download=True)
                if info:
                    filepath = ydl.prepare_filename(info)
                    print(f"✅ 下载完成: {filepath}")
                    return filepath
        except Exception as e:
            print(f"⚠️ 格式 {fmt} 下载失败，异常: {e}")
            continue

    print("❌ 所有格式尝试均失败。")
    return None

if __name__ == "__main__":
    video_url = "https://www.youtube.com/watch?v=QL3T2Nzcqcs"
    download_video(video_url)