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robust_relay.py
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227
robust_relay.py
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# robust_relay.py
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# 高稳定性 YouTube 转播模块（防误判下播 + 看门狗 + 自动重连 + token刷新）
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# 作者：融合 A+B 代码精华，专为抖音/抖音国际版长期无人值守转播设计
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import subprocess
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import time
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import threading
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import os
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import signal
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import datetime
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from typing import List, Optional, Callable
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# ==================== 配置常量（可全局覆盖） ====================
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WATCHDOG_SILENCE = 600 # 10分钟无输出 → 软重启
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WATCHDOG_GRACE = 120 # 启动宽限期
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REFRESH_URL_EVERY = 300 # 每5分钟强制刷新 real_url（防token过期）
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OFFLINE_DEBOUNCE = 3 # 连续3次API返回下播才认为真下播
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OFFLINE_WINDOW = 120 # 最近120秒有活跃就忽略下播信号
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SOFT_RESTART_COOLDOWN = 90 # 软重启最小间隔
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# ==================== 轻量探活 ====================
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def _probe_alive(url: str, timeout: float = 5.0) -> bool:
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if not url:
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return False
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try:
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import urllib.request, contextlib
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opener = urllib.request.build_opener()
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if hasattr(urllib.request, 'getproxies'):
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proxy = urllib.request.getproxies().get('http')
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if proxy:
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opener.add_handler(urllib.request.ProxyHandler({"http": proxy, "https": proxy}))
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req = urllib.request.Request(url, headers={"User-Agent": "Mozilla/5.0"}, method="HEAD")
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with contextlib.closing(opener.open(req, timeout=timeout)) as r:
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if r.code >= 400:
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return False
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head = r.read(256)
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if url.lower().endswith(".m3u8"):
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return b"#EXTM3U" in head.upper()
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if url.lower().endswith(".flv"):
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return head.startswith(b"FLV")
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return len(head) > 0
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except:
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return False
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# ==================== 增强版 ffmpeg 启动器 ====================
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def _launch_ffmpeg(
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input_url: str,
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youtube_rtmp: str,
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anchor_name: str,
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logger: Callable[[str], None],
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extra_cmd: List[str] = None
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) -> subprocess.Popen:
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cmd = [
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"ffmpeg", "-nostdin", "-hide_banner", "-stats", "-stats_period", "60", "-loglevel", "info",
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# 输入端超强重连
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"-reconnect", "1", "-reconnect_streamed", "1", "-reconnect_at_eof", "1",
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"-reconnect_delay_max", "30", "-rw_timeout", "20000000",
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# 极致低延迟 + 时间戳修复
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"-fflags", "+genpts+igndts+flush_packets", "-flags", "+global_header",
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"-thread_queue_size", "4096", "-analyzeduration", "0", "-probesize", "32",
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"-i", input_url,
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# copy 模式（质量无损）
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"-c:v", "copy", "-c:a", "copy", "-bsf:a", "aac_adtstoasc",
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"-map", "0:v?", "-map", "0:a?",
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# YouTube 强制参数
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"-f", "mpegts", "-g", "2", "-rtmp_buffer", "1000", "-rtmp_live", "live",
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"-max_delay", "0", "-tune", "zerolatency", "-avoid_negative_ts", "make_zero",
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"-muxdelay", "0", "-muxpreload", "0",
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"-fflags", "+nobuffer+flush_packets", "-avioflags", "direct",
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]
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if extra_cmd:
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cmd.extend(extra_cmd)
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cmd.append(youtube_rtmp)
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creationflags = subprocess.CREATE_NEW_PROCESS_GROUP if os.name == "nt" else 0
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proc = subprocess.Popen(
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cmd,
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stdin=subprocess.PIPE,
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stdout=subprocess.PIPE,
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stderr=subprocess.STDOUT,
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bufsize=0,
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creationflags=creationflags
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)
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# 用于看门狗
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proc.last_output_ts = time.time()
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def _reader():
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try:
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for line in proc.stdout: # type: ignore
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if not line:
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break
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text = line.decode(errors="ignore").rstrip()
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proc.last_output_ts = time.time()
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if any(k in text for k in ["bitrate=", "frame=", "speed=", "fps="]):
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logger(f"[{anchor_name}] {text}")
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except:
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pass
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threading.Thread(target=_reader, daemon=True).start()
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return proc
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# ==================== 主函数：高稳定性转播（替代原 check_subprocess） ====================
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def robust_youtube_relay(
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anchor_name: str,
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real_url: str,
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youtube_rtmp: str,
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logger: Callable[[str], None],
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get_latest_stream_url: Callable[[], Optional[str]], # 用于刷新 real_url（如有token过期）
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is_stream_still_live: Callable[[], bool], # 检查主播是否在播（API）
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extra_ffmpeg_args: List[str] = None, # 可选：加 -f segment 分段保存
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heartbeat_callback: Callable[[int], None] = None # 可选：每分钟回调已运行秒数
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) -> bool:
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"""
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返回值：
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True = 主播已下播（正常结束）
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False = 发生未知错误（建议计数错误次数）
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"""
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proc: Optional[subprocess.Popen] = None
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start_time = time.time()
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last_refresh = 0.0
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last_soft_restart = 0.0
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offline_count = 0
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last_live_ts = time.time()
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try:
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proc = _launch_ffmpeg(real_url, youtube_rtmp, anchor_name, logger, extra_ffmpeg_args)
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logger(f"[{anchor_name}] 已开始高稳定性转播 → {youtube_rtmp.split('/')[-1]}")
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while True:
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now = time.time()
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elapsed = int(now - start_time)
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silence = now - proc.last_output_ts if proc else 0
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# 1. 进程意外退出 → 重启
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if proc and proc.poll() is not None:
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logger(f"[{anchor_name}] ffmpeg 意外退出，3秒后重启...")
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time.sleep(3)
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proc = _launch_ffmpeg(real_url, youtube_rtmp, anchor_name, logger, extra_ffmpeg_args)
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start_time = time.time()
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continue
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# 2. 看门狗：长时间无输出 → 软重启
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if elapsed > WATCHDOG_GRACE and silence > WATCHDOG_SILENCE:
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if now - last_soft_restart > SOFT_RESTART_COOLDOWN:
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logger(f"[{anchor_name}] 检测到卡顿（{silence:.0f}s无输出），软重启 ffmpeg...")
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last_soft_restart = now
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if proc and proc.stdin:
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proc.stdin.write(b'q')
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proc.stdin.flush()
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time.sleep(4)
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proc = _launch_ffmpeg(real_url, youtube_rtmp, anchor_name, logger, extra_ffmpeg_args)
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start_time = time.time()
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continue
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# 3. 定期刷新播放地址（防token过期）
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if now - last_refresh > REFRESH_URL_EVERY:
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new_url = get_latest_stream_url()
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if new_url and new_url != real_url:
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logger(f"[{anchor_name}] 检测到新的播放地址，切换中...")
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real_url = new_url
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if proc and proc.stdin:
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proc.stdin.write(b'q')
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time.sleep(3)
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proc = _launch_ffmpeg(real_url, youtube_rtmp, anchor_name, logger, extra_ffmpeg_args)
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start_time = time.time()
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last_refresh = now
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# 4. 下播防抖判定（核心防误判）
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try:
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still_live = is_stream_still_live()
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except:
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still_live = True # 接口异常不判下播
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if not still_live:
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# 交叉验证：流还能访问 → 忽略API误判
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if _probe_alive(real_url):
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logger(f"[{anchor_name}] API判下播但流仍活跃，忽略本次误判")
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still_live = True
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last_live_ts = now
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if still_live:
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offline_count = 0
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last_live_ts = now
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else:
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if now - last_live_ts < OFFLINE_WINDOW:
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logger(f"[{anchor_name}] 短期掉线，忽略")
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else:
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offline_count += 1
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if offline_count >= OFFLINE_DEBOUNCE:
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logger(f"[{anchor_name}] 连续{offline_count}次确认下播，结束转播")
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if proc and proc.stdin:
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proc.stdin.write(b'q')
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return True
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else:
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logger(f"[{anchor_name}] 疑似下播 {offline_count}/{OFFLINE_DEBOUNCE}，继续观察")
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# 5. 心跳日志 & 回调
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if elapsed % 60 < 2:
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h, m = divmod(elapsed // 60, 60)
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logger(f"[{anchor_name}] 正在转播 {h:02d}:{m:02d}")
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if heartbeat_callback:
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heartbeat_callback(elapsed)
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time.sleep(8)
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except KeyboardInterrupt:
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logger(f"[{anchor_name}] 手动终止转播")
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return True
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except Exception as e:
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logger(f"[{anchor_name}] 严重错误: {e}")
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return False
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finally:
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if proc:
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try:
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proc.stdin.write(b'q') if proc.stdin else None
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proc.wait(timeout=8)
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except:
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proc.kill()
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