fix: prime the EI pipeline at startup

Author: robgee86

src/arduino/app_bricks/video_imageclassification/__init__.py

@@ -7,6 +7,7 @@
 import inspect
 import threading
 import socket
+import numpy as np
 from typing import Callable
 
 from websockets.sync.client import connect, ClientConnection
@@ -179,6 +180,11 @@ def camera_loop(self):
                     tcp_socket.connect((self._host, 5050))
                     logger.info(f"TCP connection established to {self._host}:5050")
 
+                    # Send a priming frame to initialize the EI pipeline and its web server
+                    frame = np.zeros((320, 320, 3), dtype=np.uint8)
+                    jpeg_frame = compress_to_jpeg(frame)
+                    tcp_socket.sendall(jpeg_frame.tobytes())
+
                     while self._is_running.is_set():
                         try:
                             frame = self._camera.capture()

src/arduino/app_bricks/video_objectdetection/__init__.py

@@ -7,6 +7,7 @@
 import inspect
 import threading
 import socket
+import numpy as np
 from typing import Callable
 
 from websockets.sync.client import connect, ClientConnection
@@ -171,6 +172,11 @@ def camera_loop(self):
                     tcp_socket.connect((self._host, 5050))
                     logger.info(f"TCP connection established to {self._host}:5050")
 
+                    # Send a priming frame to initialize the EI pipeline and its web server
+                    frame = np.zeros((320, 320, 3), dtype=np.uint8)
+                    jpeg_frame = compress_to_jpeg(frame)
+                    tcp_socket.sendall(jpeg_frame.tobytes())
+
                     while self._is_running.is_set():
                         try:
                             frame = self._camera.capture()