Add ability to get snapshot of birdseye when birdseye restream is enabled

frigate/http.py

@@ -825,6 +825,24 @@ def latest_frame(camera_name):
 
         frame = cv2.resize(frame, dsize=(width, height), interpolation=cv2.INTER_AREA)
 
+        ret, jpg = cv2.imencode(
+            ".jpg", frame, [int(cv2.IMWRITE_JPEG_QUALITY), resize_quality]
+        )
+        response = make_response(jpg.tobytes())
+        response.headers["Content-Type"] = "image/jpeg"
+        response.headers["Cache-Control"] = "no-store"
+        return response
+    elif camera_name == "birdseye" and current_app.frigate_config.restream.birdseye:
+        frame = cv2.cvtColor(
+            current_app.detected_frames_processor.get_current_frame(camera_name),
+            cv2.COLOR_YUV2BGR_I420,
+        )
+
+        height = int(request.args.get("h", str(frame.shape[0])))
+        width = int(height * frame.shape[1] / frame.shape[0])
+
+        frame = cv2.resize(frame, dsize=(width, height), interpolation=cv2.INTER_AREA)
+
         ret, jpg = cv2.imencode(
             ".jpg", frame, [int(cv2.IMWRITE_JPEG_QUALITY), resize_quality]
         )

frigate/object_processing.py

@@ -880,6 +880,12 @@ class TrackedObjectProcessor(threading.Thread):
             return {}
 
     def get_current_frame(self, camera, draw_options={}):
+        if camera == "birdseye":
+            return self.frame_manager.get(
+                "birdseye",
+                (self.config.birdseye.height * 3 // 2, self.config.birdseye.width),
+            )
+
         return self.camera_states[camera].get_current_frame(draw_options)
 
     def get_current_frame_time(self, camera) -> int:

frigate/output.py

@@ -152,7 +152,7 @@ class BroadcastThread(threading.Thread):
 
 
 class BirdsEyeFrameManager:
-    def __init__(self, config, frame_manager: SharedMemoryFrameManager):
+    def __init__(self, config: FrigateConfig, frame_manager: SharedMemoryFrameManager):
         self.config = config
         self.mode = config.birdseye.mode
         self.frame_manager = frame_manager
@@ -463,6 +463,12 @@ def output_frames(config: FrigateConfig, video_output_queue):
 
     birdseye_manager = BirdsEyeFrameManager(config, frame_manager)
 
+    if config.restream.birdseye:
+        birdseye_buffer = frame_manager.create(
+            "birdseye",
+            birdseye_manager.yuv_shape[0] * birdseye_manager.yuv_shape[1],
+        )
+
     while not stop_event.is_set():
         try:
             (
@@ -500,7 +506,12 @@ def output_frames(config: FrigateConfig, video_output_queue):
                 frame_time,
                 frame,
             ):
-                converters["birdseye"].write(birdseye_manager.frame.tobytes())
+                frame_bytes = birdseye_manager.frame.tobytes()
+
+                if config.restream.birdseye:
+                    birdseye_buffer[:] = frame_bytes
+
+                converters["birdseye"].write(frame_bytes)
 
         if camera in previous_frames:
             frame_manager.delete(f"{camera}{previous_frames[camera]}")