diff --git a/vr180_matting/vr180_processor.py b/vr180_matting/vr180_processor.py
index cd6d2b9..8051996 100644
--- a/vr180_matting/vr180_processor.py
+++ b/vr180_matting/vr180_processor.py
@@ -158,12 +158,48 @@ class VR180Processor(VideoProcessor):
         try:
             # Write frames to temporary video
             height, width = eye_frames[0].shape[:2]
-            fourcc = cv2.VideoWriter_fourcc(*'mp4v')
-            writer = cv2.VideoWriter(str(temp_video_path), fourcc, 30.0, (width, height))
+            
+            # Try different codecs if mp4v fails
+            codecs_to_try = [
+                ('mp4v', '.mp4'),
+                ('XVID', '.avi'), 
+                ('MJPG', '.avi')
+            ]
+            
+            writer = None
+            for fourcc_str, ext in codecs_to_try:
+                fourcc = cv2.VideoWriter_fourcc(*fourcc_str)
+                temp_video_path_with_ext = temp_video_path.with_suffix(ext)
+                writer = cv2.VideoWriter(str(temp_video_path_with_ext), fourcc, 30.0, (width, height))
+                
+                if writer.isOpened():
+                    temp_video_path = temp_video_path_with_ext
+                    print(f"Using codec {fourcc_str} for temp video")
+                    break
+                else:
+                    writer.release()
+                    writer = None
+            
+            if writer is None:
+                raise RuntimeError("Failed to open video writer with any codec")
             
             for frame in eye_frames:
-                writer.write(frame)
+                success = writer.write(frame)
+                if not success:
+                    raise RuntimeError(f"Failed to write frame to {temp_video_path}")
+            
             writer.release()
+            del writer  # Ensure it's fully released
+            
+            # Verify the file was created and has content
+            if not temp_video_path.exists():
+                raise RuntimeError(f"Temporary video file was not created: {temp_video_path}")
+            
+            file_size = temp_video_path.stat().st_size
+            if file_size == 0:
+                raise RuntimeError(f"Temporary video file is empty: {temp_video_path}")
+            
+            print(f"Created temp video {temp_video_path} ({file_size / 1024 / 1024:.1f} MB)")
             
             # Initialize SAM2 with video path
             self.sam2_model.init_video_state(video_path=str(temp_video_path))