diff --git a/vr180_matting/vr180_processor.py b/vr180_matting/vr180_processor.py
index 8051996..72d7cd7 100644
--- a/vr180_matting/vr180_processor.py
+++ b/vr180_matting/vr180_processor.py
@@ -183,10 +183,28 @@ class VR180Processor(VideoProcessor):
             if writer is None:
                 raise RuntimeError("Failed to open video writer with any codec")
             
-            for frame in eye_frames:
+            # Debug frame properties
+            first_frame = eye_frames[0]
+            print(f"Frame properties: shape={first_frame.shape}, dtype={first_frame.dtype}, "
+                  f"min={first_frame.min()}, max={first_frame.max()}")
+            
+            for i, frame in enumerate(eye_frames):
+                # Ensure frame is in the right format for OpenCV
+                if frame.dtype != np.uint8:
+                    frame = frame.astype(np.uint8)
+                
+                # Ensure frame is contiguous
+                if not frame.flags['C_CONTIGUOUS']:
+                    frame = np.ascontiguousarray(frame)
+                
                 success = writer.write(frame)
                 if not success:
-                    raise RuntimeError(f"Failed to write frame to {temp_video_path}")
+                    print(f"Failed to write frame {i}/{len(eye_frames)}")
+                    print(f"Frame {i} properties: shape={frame.shape}, dtype={frame.dtype}, contiguous={frame.flags['C_CONTIGUOUS']}")
+                    raise RuntimeError(f"Failed to write frame {i} to {temp_video_path}")
+                
+                if i % 50 == 0:
+                    print(f"Written {i}/{len(eye_frames)} frames")
             
             writer.release()
             del writer  # Ensure it's fully released