diff --git a/vr180_streaming/sam2_streaming_simple.py b/vr180_streaming/sam2_streaming_simple.py
index 203832f..ae081e4 100644
--- a/vr180_streaming/sam2_streaming_simple.py
+++ b/vr180_streaming/sam2_streaming_simple.py
@@ -205,10 +205,13 @@ class SAM2StreamingProcessor:
                 if out_frame_idx == latest_frame_idx:
                     # Combine all object masks
                     if len(out_mask_logits) > 0:
-                        combined_mask = np.zeros_like(out_mask_logits[0], dtype=bool)
+                        combined_mask = None
                         for mask_logit in out_mask_logits:
                             mask = (mask_logit > 0.0).cpu().numpy()
-                            combined_mask = combined_mask | mask
+                            if combined_mask is None:
+                                combined_mask = mask.astype(bool)
+                            else:
+                                combined_mask = combined_mask | mask.astype(bool)
                         
                         return (combined_mask * 255).astype(np.uint8)
             
@@ -250,4 +253,82 @@ class SAM2StreamingProcessor:
             torch.cuda.synchronize()
         gc.collect()
         
-        print("🧹 Simple SAM2 streaming processor cleaned up")
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+        print("🧹 Simple SAM2 streaming processor cleaned up")
+        
+    def apply_mask_to_frame(self, 
+                          frame: np.ndarray, 
+                          mask: np.ndarray, 
+                          output_format: str = "alpha",
+                          background_color: tuple = (0, 255, 0)) -> np.ndarray:
+        """
+        Apply mask to frame with specified output format (matches chunked implementation)
+        
+        Args:
+            frame: Input frame (BGR)
+            mask: Binary mask (0-255 or boolean)
+            output_format: "alpha" or "greenscreen" 
+            background_color: RGB background color for greenscreen mode
+            
+        Returns:
+            Processed frame
+        """
+        if mask is None:
+            return frame
+        
+        # Ensure mask is 2D (handle 3D masks properly)
+        if mask.ndim == 3:
+            mask = mask.squeeze()
+        
+        # Resize mask to match frame if needed (use INTER_NEAREST for binary masks)
+        if mask.shape[:2] != frame.shape[:2]:
+            import cv2
+            # Convert to uint8 for resizing, then back to bool
+            if mask.dtype == bool:
+                mask_uint8 = mask.astype(np.uint8) * 255
+            else:
+                mask_uint8 = mask.astype(np.uint8)
+            
+            mask_resized = cv2.resize(mask_uint8, 
+                                    (frame.shape[1], frame.shape[0]), 
+                                    interpolation=cv2.INTER_NEAREST)
+            mask = mask_resized.astype(bool) if mask.dtype == bool else mask_resized
+        
+        if output_format == "alpha":
+            # Create RGBA output (matches chunked implementation)
+            output = np.zeros((frame.shape[0], frame.shape[1], 4), dtype=np.uint8)
+            output[:, :, :3] = frame
+            if mask.dtype == bool:
+                output[:, :, 3] = mask.astype(np.uint8) * 255
+            else:
+                output[:, :, 3] = mask.astype(np.uint8)
+            return output
+        
+        elif output_format == "greenscreen":
+            # Create RGB output with background (matches chunked implementation)
+            output = np.full_like(frame, background_color, dtype=np.uint8)
+            if mask.dtype == bool:
+                output[mask] = frame[mask]
+            else:
+                mask_bool = mask.astype(bool)
+                output[mask_bool] = frame[mask_bool]
+            return output
+        
+        else:
+            raise ValueError(f"Unsupported output format: {output_format}. Use 'alpha' or 'greenscreen'")
+            
+    def get_memory_usage(self) -> Dict[str, float]:
+        """
+        Get current memory usage statistics
+        
+        Returns:
+            Dictionary with memory usage info
+        """
+        stats = {}
+        
+        if torch.cuda.is_available():
+            # GPU memory stats
+            stats['cuda_allocated_gb'] = torch.cuda.memory_allocated() / (1024**3)
+            stats['cuda_reserved_gb'] = torch.cuda.memory_reserved() / (1024**3)
+            stats['cuda_max_allocated_gb'] = torch.cuda.max_memory_allocated() / (1024**3)
+            
+        return stats
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