diff --git a/hls_downloader.py b/hls_downloader.py
index 544cb44..b5f7c65 100644
--- a/hls_downloader.py
+++ b/hls_downloader.py
@@ -20,6 +20,12 @@ ffmpeg_process: Optional[subprocess.Popen] = None
 running = True
 should_restart = False  # 标记是否需要重新启动ffmpeg（凌晨3点触发）
 
+# ffmpeg 退出追踪状态（用于判断是否切换 stream_type）
+state = {
+    'exit_times': [],           # 记录 ffmpeg 退出时间戳
+    'use_fallback_stream': False  # 标记下次是否使用 stream_type=1
+}
+
 
 def parse_args():
     """解析命令行参数"""
@@ -55,9 +61,20 @@ def parse_args():
 
 def get_hls_url(index_code: str) -> Optional[str]:
     """获取HLS播放地址"""
+    # 确定使用哪个 stream_type
+    stream_type = 0
+    try:
+        stream_type = 1 if state['use_fallback_stream'] else 0
+        if state['use_fallback_stream']:
+            state['use_fallback_stream'] = False
+            state['exit_times'].clear()  # 使用 fallback 时清空退出记录
+            logger.info("Using fallback stream_type=1")
+    except Exception as e:
+        logger.error(f"Error determining stream_type: {e}")
+    
     try:
         import test_cam
-        result = test_cam.get_camera_hls_url(index_code, 0)
+        result = test_cam.get_camera_hls_url(index_code, stream_type)
         if result.get("code") == "0" and result.get("data", {}).get("url"):
             return result["data"]["url"]
         else:
@@ -238,6 +255,18 @@ def main():
         if ffmpeg_process is None or ffmpeg_process.poll() is not None:
             if ffmpeg_process is not None and ffmpeg_process.poll() is not None:
                 logger.warning(f"FFmpeg exited unexpectedly with code: {ffmpeg_process.returncode}")
+                
+                # 记录退出时间，检查是否需要切换 stream_type
+                try:
+                    state['exit_times'].append(datetime.now())
+                    # 清理超过10分钟的旧记录
+                    state['exit_times'][:] = [t for t in state['exit_times'] if datetime.now() - t < timedelta(minutes=10)]
+                    
+                    if len(state['exit_times']) > 3:  # 10分钟内退出超过3次（即第4次）
+                        state['use_fallback_stream'] = True
+                        logger.warning("FFmpeg exited 4+ times in 10 minutes, will use stream_type=1 next call")
+                except Exception as e:
+                    logger.error(f"Error tracking exit times: {e}")
             
             # 尝试启动下载
             success = download_cycle(