fix: 修复批量处理中图片文件重复计数问题

- 替换glob模式匹配为直接文件系统遍历
- 避免在大小写不敏感文件系统上的重复匹配
- 添加更好的错误处理和调试日志
- 确保图片计数准确性

修复了Windows系统上同一图片文件被计数两次的问题

python_core/ai_video/video_generator.py

@@ -245,19 +245,37 @@ class VideoGenerator:
                 progress_callback(f"  模型类型: {model_type}")
             
             # Find image files
-            image_extensions = ['*.jpg', '*.jpeg', '*.png', '*.bmp', '*.gif', '*.tiff', '*.webp']
+            # Use a more robust approach to find image files
+            image_extensions = ['.jpg', '.jpeg', '.png', '.bmp', '.gif', '.tiff', '.webp']
             image_files = []
-            for ext in image_extensions:
-                image_files.extend(glob.glob(os.path.join(image_folder, ext)))
-                image_files.extend(glob.glob(os.path.join(image_folder, ext.upper())))
-            
+
+            # Get all files in the directory
+            try:
+                all_files = os.listdir(image_folder)
+                for file in all_files:
+                    file_path = os.path.join(image_folder, file)
+                    if os.path.isfile(file_path):
+                        # Check if file extension matches (case-insensitive)
+                        file_ext = os.path.splitext(file)[1].lower()
+                        if file_ext in image_extensions:
+                            image_files.append(file_path)
+            except OSError as e:
+                result['msg'] = f"Failed to read directory {image_folder}: {str(e)}"
+                logger.error(result['msg'])
+                return result
+
             if not image_files:
                 result['msg'] = f"No image files found in {image_folder}"
                 logger.error(result['msg'])
                 return result
-            
+
             if progress_callback:
                 progress_callback(f'目录下找到 {len(image_files)} 张图片')
+
+            # Debug: log found image files
+            logger.info(f"Found {len(image_files)} image files in {image_folder}")
+            for i, img_file in enumerate(image_files):
+                logger.info(f"  {i+1}. {os.path.basename(img_file)}")
             
             if not prompts:
                 result['msg'] = "No prompts provided"