diff --git a/vr180_matting/video_processor.py b/vr180_matting/video_processor.py
index a99e91f..ac149a8 100644
--- a/vr180_matting/video_processor.py
+++ b/vr180_matting/video_processor.py
@@ -1025,17 +1025,31 @@ class VideoProcessor:
                 
                 print(f"\nProcessing chunk {chunk_idx}: frames {start_frame}-{end_frame}")
                 
-                # Read chunk frames at dual resolution
-                print(f"🔄 Reading frames at dual resolution (scale_factor={self.config.processing.scale_factor})")
-                frame_data = self.read_video_frames_dual_resolution(
-                    self.config.input.video_path,
-                    start_frame=start_frame,
-                    num_frames=frames_to_read,
-                    scale_factor=self.config.processing.scale_factor
-                )
-                
-                # Process chunk with dual-resolution approach
-                matted_frames = self.process_chunk_dual_resolution(frame_data, chunk_idx)
+                # Choose processing approach based on scale factor
+                if self.config.processing.scale_factor == 1.0:
+                    # No scaling needed - use original single-resolution approach
+                    print(f"🔄 Reading frames at original resolution (no scaling)")
+                    frames = self.read_video_frames(
+                        self.config.input.video_path,
+                        start_frame=start_frame,
+                        num_frames=frames_to_read,
+                        scale_factor=1.0
+                    )
+                    
+                    # Process chunk normally (single resolution)
+                    matted_frames = self.process_chunk(frames, chunk_idx)
+                else:
+                    # Scaling required - use dual-resolution approach
+                    print(f"🔄 Reading frames at dual resolution (scale_factor={self.config.processing.scale_factor})")
+                    frame_data = self.read_video_frames_dual_resolution(
+                        self.config.input.video_path,
+                        start_frame=start_frame,
+                        num_frames=frames_to_read,
+                        scale_factor=self.config.processing.scale_factor
+                    )
+                    
+                    # Process chunk with dual-resolution approach
+                    matted_frames = self.process_chunk_dual_resolution(frame_data, chunk_idx)
                 
                 # Save chunk to disk immediately to free memory
                 chunk_path = temp_chunk_dir / f"chunk_{chunk_idx:04d}.npz"
@@ -1050,7 +1064,10 @@ class VideoProcessor:
                 
                 # Free the frames from memory immediately
                 del matted_frames
-                del frame_data
+                if self.config.processing.scale_factor == 1.0:
+                    del frames
+                else:
+                    del frame_data
                 
                 # Update statistics
                 self.processing_stats['chunks_processed'] += 1