Update app.py

app.py

@@ -364,18 +364,22 @@ class AttendanceSystem:
     def _processing_loop(self, source):
         video_capture = cv2.VideoCapture(source)
         if not video_capture.isOpened():
-            self.error_message = "❌ Error: Could not open video source."
+            self.error_message = f"❌ Error: Could not open video source: {source}"
+            logger.error(self.error_message)
             self.is_processing.clear()
             return
 
         tracker = FaceTracker(self)
+        frame_count = 0
         while self.is_processing.is_set():
             ret, frame = video_capture.read()
             if not ret:
+                logger.info("Video ended or failed to read frame.")
                 break
             
             self.current_frame = frame.copy()
             annotated_frame = tracker.update(self.current_frame)
+            logger.debug(f"Processed frame {frame_count}, queue size: {self.frame_queue.qsize()}")
 
             if not self.frame_queue.full():
                 self.frame_queue.put(annotated_frame)
@@ -386,6 +390,7 @@ class AttendanceSystem:
                     pass
                 self.frame_queue.put(annotated_frame)
             
+            frame_count += 1
             time.sleep(0.01)
 
         video_capture.release()
@@ -478,8 +483,10 @@ def create_interface():
 
         def start_wrapper(tab_index, cam_src, vid_path):
             source = int(cam_src) if tab_index == 0 else vid_path
-            return "Please provide an input source." if source is None else attendance_system.start_processing(source)
-        
+            if tab_index == 1 and vid_path is None:
+                return "❌ Please upload a video file."
+            return attendance_system.start_processing(source) if source is not None else "Please provide an input source."
+
         start_btn.click(fn=start_wrapper, inputs=[selected_tab_index, camera_source, video_file], outputs=[status_box])
         stop_btn.click(fn=attendance_system.stop_processing, inputs=None, outputs=[status_box])
         
@@ -489,7 +496,7 @@ def create_interface():
         def update_ui_generator():
             last_frame = None
             while True:
-                status_text = "Status: Processing..."
+                status_text = "Status: Processing..." if attendance_system.is_processing.is_set() else "Status: Stopped."
                 present_md = "\n".join(attendance_system.session_log_present) or "Awaiting detections..."
                 new_md = "\n".join(attendance_system.session_log_new) or "Awaiting new registrations..."
                 frame = None
@@ -498,10 +505,11 @@ def create_interface():
                     try:
                         frame = attendance_system.frame_queue.get_nowait()
                         last_frame = frame
+                        logger.debug("Retrieved frame from queue for UI update")
                     except queue.Empty:
                         frame = last_frame
+                        logger.debug("Using last frame due to empty queue")
                 else:
-                    status_text = "Status: Stopped."
                     present_md = "Processing stopped. Final Present Log:\n\n" + present_md
                     new_md = "Processing stopped. Final New Workers Log:\n\n" + new_md