Update app.py

app.py

@@ -1449,17 +1449,34 @@ def process_video_main(
                 final_path = result[0]  # Extract just the path
                 status_message = result[-1]  # Extract the status message
                 
+                logger.info(f"DEBUG: TwoStageProcessor returned final_path: {final_path}")
+                logger.info(f"DEBUG: TwoStageProcessor returned status: {status_message}")
+                
                 if final_path and os.path.exists(final_path):
+                    logger.info(f"DEBUG: Final path exists, size: {os.path.getsize(final_path)} bytes")
                     status_messages.append("TwoStageProcessor completed successfully with SAM2 Large (WORKING VERSION)")
                     status_messages.append(status_message)
                     
-                    # Copy to desired output location
+                    # Copy to desired output location with better error handling
                     output_path = OUT_DIR / f"final_output_{int(time.time())}_{uuid4().hex[:6]}.mp4"
-                    shutil.copy2(final_path, str(output_path))
-                    return str(output_path), "\n".join(status_messages)
+                    try:
+                        logger.info(f"DEBUG: Copying {final_path} to {output_path}")
+                        shutil.copy2(final_path, str(output_path))
+                        
+                        if os.path.exists(output_path):
+                            logger.info(f"DEBUG: Copy successful, output size: {os.path.getsize(output_path)} bytes")
+                            return str(output_path), "\n".join(status_messages)
+                        else:
+                            logger.error("DEBUG: Copy failed - output file does not exist")
+                            return None, f"Copy failed: output file not created"
+                    except Exception as copy_error:
+                        logger.error(f"DEBUG: Copy failed with error: {copy_error}")
+                        return None, f"Copy failed: {str(copy_error)}"
                 else:
-                    return None, f"TwoStageProcessor failed: {status_message}"
+                    logger.error(f"DEBUG: Final path does not exist or is None: {final_path}")
+                    return None, f"TwoStageProcessor failed: {status_message} (final_path: {final_path})"
             else:
+                logger.error(f"DEBUG: TwoStageProcessor returned unexpected format: {result}")
                 return None, f"TwoStageProcessor returned unexpected format: {result}"
                 
         except ImportError as e: