Update app.py

app.py

@@ -280,7 +280,9 @@ def _generate_video(
         # NSFW 检测
         if nsfw_model and nsfw_processor:
             num_total_frames = len(output_frames_list)
-            if detect_frames_nsfw(output_frames_list,num_total_frames // (FIXED_FPS/2),0.6):
+            sample_count = max(1, int(num_total_frames // (FIXED_FPS / 2)))
+
+            if detect_frames_nsfw(output_frames_list,sample_count,0.6):
                 msg = "Generated video contains NSFW content and cannot be displayed. Please modify the input image or prompt and try again."
                 raise Exception(msg)