Send error image when camera stream is not available

frigate/http.py

@@ -1,6 +1,7 @@
 import base64
 from datetime import datetime, timedelta
 import copy
+import glob
 import logging
 import json
 import os
@@ -657,8 +658,15 @@ def latest_frame(camera_name):
         frame = current_app.detected_frames_processor.get_current_frame(
             camera_name, draw_options
         )
-        if frame is None:
-            frame = np.zeros((720, 1280, 3), np.uint8)
+
+        if frame is None or datetime.now().timestamp() > (
+            current_app.detected_frames_processor.get_current_frame_time(camera_name)
+            + 10
+        ):
+            error_image = glob.glob("/opt/frigate/frigate/images/camera-error.jpg")
+
+            if len(error_image) > 0:
+                frame = cv2.imread(error_image[0], cv2.IMREAD_UNCHANGED)
 
         height = int(request.args.get("h", str(frame.shape[0])))
         width = int(height * frame.shape[1] / frame.shape[0])

frigate/object_processing.py

@@ -882,6 +882,10 @@ class TrackedObjectProcessor(threading.Thread):
     def get_current_frame(self, camera, draw_options={}):
         return self.camera_states[camera].get_current_frame(draw_options)
 
+    def get_current_frame_time(self, camera) -> int:
+        """Returns the latest frame time for a given camera."""
+        return self.camera_states[camera].current_frame_time
+
     def run(self):
         while not self.stop_event.is_set():
             try:

frigate/output.py

@@ -7,7 +7,6 @@ import queue
 import signal
 import subprocess as sp
 import threading
-from multiprocessing import shared_memory
 from wsgiref.simple_server import make_server
 
 import cv2