284 lines
9.5 KiB
Python
284 lines
9.5 KiB
Python
# hls_downloader.py
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# HLS分片TS下载管理进程
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# 功能：管理ffmpeg下载HLS直播流，支持异常重试、定时轮换、文件清理
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import os
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import sys
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import json
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import argparse
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import signal
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import subprocess
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import shutil
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import time
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from datetime import datetime, timedelta
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from typing import Optional
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from utils.logger import get_logger
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logger = get_logger(__name__)
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ffmpeg_process: Optional[subprocess.Popen] = None
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running = True
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should_restart = False # 标记是否需要重新启动ffmpeg（凌晨3点触发）
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def parse_args():
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"""解析命令行参数"""
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parser = argparse.ArgumentParser(description="HLS Downloader Manager")
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parser.add_argument("--index-code", required=True, help="Camera index code")
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parser.add_argument("--camera-name", required=True, help="Camera name")
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parser.add_argument("--camera-id", required=True, type=int, help="Camera ID")
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parser.add_argument("--hls-root-path", required=True, help="HLS root path")
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parser.add_argument("--rotate-hour", required=True, type=int, help="Daily rotate hour (0-23)")
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parser.add_argument("--retention-days", required=True, type=int, help="File retention days")
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parser.add_argument("--retry-interval", required=True, type=int, help="Retry interval seconds")
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return parser.parse_args()
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# def init_logger(index_code: str, pid: int):
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# """初始化日志记录器"""
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# global logger
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# log_dir = "log"
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# if not os.path.exists(log_dir):
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# os.makedirs(log_dir)
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# log_file = os.path.join(log_dir, f"hls_downloader_{index_code}_{pid}.log")
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#
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# # 创建独立的logger实例
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# from logging import Logger, FileHandler, Formatter, INFO
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# logger = Logger(f"hls_downloader_{index_code}")
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# handler = FileHandler(log_file, encoding='utf-8')
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# handler.setFormatter(Formatter('%(asctime)s - %(levelname)s - %(message)s'))
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# logger.addHandler(handler)
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# logger.setLevel(INFO)
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#
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# logger.info(f"Logger initialized, log file: {log_file}")
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def get_hls_url(index_code: str) -> Optional[str]:
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"""获取HLS播放地址"""
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try:
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import test_cam
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result = test_cam.get_camera_hls_url(index_code, 0)
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if result.get("code") == "0" and result.get("data", {}).get("url"):
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return result["data"]["url"]
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else:
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logger.error(f"Failed to get HLS URL: {result}")
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return None
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except Exception as e:
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logger.error(f"Exception while getting HLS URL: {e}")
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return None
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def create_session_folder(hls_root_path: str, index_code: str) -> str:
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"""创建下载会话文件夹"""
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session_name = datetime.now().strftime("%Y%m%d_%H%M%S")
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index_folder = os.path.join(hls_root_path, index_code)
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session_folder = os.path.join(index_folder, session_name)
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os.makedirs(session_folder, exist_ok=True)
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logger.info(f"Created session folder: {session_folder}")
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return session_folder
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def start_ffmpeg(m3u8_url: str, session_folder: str) -> Optional[subprocess.Popen]:
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"""启动ffmpeg下载进程"""
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global ffmpeg_process
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try:
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segment_pattern = os.path.join(session_folder, "segment_%09d.ts")
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playlist_path = os.path.join(session_folder, "playlist.m3u8")
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cmd = [
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"ffmpeg",
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"-i", m3u8_url,
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"-c", "copy",
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"-hls_segment_filename", segment_pattern,
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playlist_path
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]
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logger.info(f"Starting ffmpeg: {' '.join(cmd)}")
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# 启动ffmpeg，丢弃输出
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ffmpeg_process = subprocess.Popen(
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cmd,
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stdout=subprocess.DEVNULL,
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stderr=subprocess.DEVNULL
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)
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logger.info(f"FFmpeg started with PID: {ffmpeg_process.pid}")
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return ffmpeg_process
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except Exception as e:
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logger.error(f"Failed to start ffmpeg: {e}")
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return None
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def stop_ffmpeg():
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"""停止ffmpeg进程"""
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global ffmpeg_process
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if ffmpeg_process and ffmpeg_process.poll() is None:
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logger.info(f"Stopping ffmpeg process (PID: {ffmpeg_process.pid})")
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try:
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ffmpeg_process.terminate()
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# 等待进程结束
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try:
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ffmpeg_process.wait(timeout=5)
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except subprocess.TimeoutExpired:
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logger.warning("FFmpeg did not terminate gracefully, killing...")
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ffmpeg_process.kill()
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ffmpeg_process.wait()
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logger.info("FFmpeg process stopped")
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except Exception as e:
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logger.error(f"Error stopping ffmpeg: {e}")
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ffmpeg_process = None
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def cleanup_old_folders(hls_root_path: str, index_code: str, retention_days: int):
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"""清理过期的下载文件夹"""
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try:
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index_folder = os.path.join(hls_root_path, index_code)
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if not os.path.exists(index_folder):
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return
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cutoff_date = datetime.now() - timedelta(days=retention_days)
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cutoff_str = cutoff_date.strftime("%Y%m%d")
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deleted_count = 0
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for folder_name in os.listdir(index_folder):
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folder_path = os.path.join(index_folder, folder_name)
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if os.path.isdir(folder_path):
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# 从文件夹名称解析日期 (yyyyMMdd_HHmmss)
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try:
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date_str = folder_name.split("_")[0]
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if date_str < cutoff_str:
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shutil.rmtree(folder_path)
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logger.info(f"Deleted old folder: {folder_path}")
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deleted_count += 1
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except Exception as e:
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logger.warning(f"Failed to parse folder date {folder_name}: {e}")
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if deleted_count > 0:
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logger.info(f"Cleaned up {deleted_count} old folders")
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except Exception as e:
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logger.error(f"Error cleaning up old folders: {e}")
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def get_next_rotate_time(rotate_hour: int) -> datetime:
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"""计算下次轮换时间"""
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now = datetime.now()
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rotate_time = now.replace(hour=rotate_hour, minute=0, second=0, microsecond=0)
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if now >= rotate_time:
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# 已经过了今天的轮换时间，计算明天的
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rotate_time += timedelta(days=1)
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return rotate_time
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def download_cycle(hls_root_path: str, index_code: str, retry_interval: int) -> bool:
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"""
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执行一次下载流程
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返回：True表示成功启动ffmpeg，False表示失败
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"""
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# 1. 获取HLS地址
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m3u8_url = get_hls_url(index_code)
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if not m3u8_url:
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logger.error("Failed to get HLS URL, will retry later")
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return False
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# 2. 创建会话文件夹
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try:
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session_folder = create_session_folder(hls_root_path, index_code)
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except Exception as e:
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logger.error(f"Failed to create session folder: {e}")
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return False
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# 3. 启动ffmpeg
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proc = start_ffmpeg(m3u8_url, session_folder)
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if not proc:
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logger.error("Failed to start ffmpeg")
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return False
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return True
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def signal_handler(signum, frame):
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"""信号处理器"""
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global running
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logger.info(f"Received signal {signum}, shutting down...")
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running = False
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def main():
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global running, should_restart, ffmpeg_process
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args = parse_args()
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# # 初始化日志
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# init_logger(args.index_code, os.getpid())
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# 注册信号处理器
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signal.signal(signal.SIGTERM, signal_handler)
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signal.signal(signal.SIGINT, signal_handler)
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logger.info(f"HLS Downloader starting for camera: {args.camera_name} (index: {args.index_code})")
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logger.info(f"Config: hls_root={args.hls_root_path}, rotate_hour={args.rotate_hour}, "
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f"retention_days={args.retention_days}, retry_interval={args.retry_interval}")
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# 计算下次轮换时间
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next_rotate_time = get_next_rotate_time(args.rotate_hour)
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logger.info(f"Next rotation scheduled at: {next_rotate_time}")
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# 主循环
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while running:
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# 如果没有运行中的ffmpeg，尝试启动
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if ffmpeg_process is None or ffmpeg_process.poll() is not None:
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if ffmpeg_process is not None and ffmpeg_process.poll() is not None:
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logger.warning(f"FFmpeg exited unexpectedly with code: {ffmpeg_process.returncode}")
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# 尝试启动下载
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success = download_cycle(
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args.hls_root_path,
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args.index_code,
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args.retry_interval
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)
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if not success:
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logger.info(f"Download failed, waiting {args.retry_interval} seconds before retry...")
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time.sleep(args.retry_interval)
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continue
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# 检查是否到达轮换时间
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now = datetime.now()
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if now >= next_rotate_time:
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logger.info("Daily rotation triggered")
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# 停止当前ffmpeg
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stop_ffmpeg()
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# 清理旧文件
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cleanup_old_folders(args.hls_root_path, args.index_code, args.retention_days)
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# 计算下次轮换时间
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next_rotate_time = get_next_rotate_time(args.rotate_hour)
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logger.info(f"Next rotation scheduled at: {next_rotate_time}")
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# 继续循环，会重新启动ffmpeg
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time.sleep(1)
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continue
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# 短暂休眠，避免CPU占用过高
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time.sleep(1)
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# 退出前清理
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logger.info("Shutting down HLS Downloader...")
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stop_ffmpeg()
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logger.info("HLS Downloader stopped")
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if __name__ == "__main__":
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main()
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