diff --git a/sim_scenes/featured/jupiter_moon_protects_earth.py b/sim_scenes/featured/jupiter_moon_protects_earth.py
index 3a3a4069dfe904a14c61015d2e032c7b7fecc8f7..e4345c7b7dc8c098aafb06d29f1049eddf3305e2 100644
--- a/sim_scenes/featured/jupiter_moon_protects_earth.py
+++ b/sim_scenes/featured/jupiter_moon_protects_earth.py
@@ -228,7 +228,7 @@ class JupiterMoonProtectsEarthSim(UniverseSimScenes):
                     print("满足条件退出")
                     exit()
 
-        if ctime - self.run_begin_time > 600:
+        if ctime - self.run_begin_time > 700:
             print("没有满足条件退出")
             exit()
 
diff --git a/tools/sim_video_cap.py b/tools/sim_video_cap.py
index 672d6cefb5785e4ee11ffac25a879ee0973991e1..0dc85a341cc20a7470261566bd5f7628a637094e 100644
--- a/tools/sim_video_cap.py
+++ b/tools/sim_video_cap.py
@@ -20,18 +20,29 @@ def get_window_handle(window_name="宇宙模拟器(universe sim)"):
     handle = win32gui.FindWindow(None, window_name)
     return handle
 
+def rename_exists(save_name):
+    file_no = 0
+    rename_save_name = save_name
+    while os.path.exists(os.path.abspath(rename_save_name)):
+        rename_save_name = f"{save_name[:-4]}_{file_no}{save_name[-4:]}"
+        file_no += 1
+
+    return rename_save_name
 
 def get_args():
     parser = argparse.ArgumentParser()
     parser.add_argument('--fps', type=int, default=30, help='frame per second')
     parser.add_argument('--total_time', type=int, default=10000000, help='video total time')
-    parser.add_argument('--save_name', type=str, default='video.mp4', help='save file name')
+    parser.add_argument('--save_name', type=str, default='jupiter_moon_protects_earth7.mp4', help='save file name')
     parser.add_argument('--wait', type=int, default=0, help='wait for recoding')
 
     # parser.add_argument('--screen_type', default=0, type=int, choices=[0, 1], help='1: full screen, 0: region screen')
     args = parser.parse_args()
     print("total_time:", args.total_time)
     print("fps:", args.fps)
+
+    args.save_name = rename_exists(args.save_name)
+
     print("save_name:", args.save_name)
     print("wait:", args.wait)
     if args.save_name == '':