core/streaming/readers.py

@@ -100,6 +100,7 @@ class FFmpegRTSPReader:
             '-f', 'rawvideo',
             '-pix_fmt', 'bgr24',
             '-an',  # No audio
+            '-update', '1',  # Update single frame in place
             '-y',  # Overwrite output file
             self.temp_file
         ]
@@ -169,19 +170,9 @@ class FFmpegRTSPReader:
                 if self.frame_ready_event.wait(timeout=restart_check_interval):
                     self.frame_ready_event.clear()
 
-                    # Read latest frame
+                    # Read current frame (file is always exactly one frame)
                     try:
                         with open(self.temp_file, 'rb') as f:
-                            # Get file size
-                            f.seek(0, 2)
-                            file_size = f.tell()
-
-                            if file_size < bytes_per_frame:
-                                continue
-
-                            # Read last complete frame
-                            last_frame_offset = (file_size // bytes_per_frame - 1) * bytes_per_frame
-                            f.seek(last_frame_offset)
                             frame_data = f.read(bytes_per_frame)
 
                             if len(frame_data) == bytes_per_frame: