added FPS display

ocv_rpicam.py

@@ -38,6 +38,8 @@ picam2 = Picamera2()
 pprint(picam2.sensor_modes)
 settings = {'NoiseReductionMode': 0, 'AeExposureMode': 0, 'ExposureTime': 10000, 'AnalogueGain': 1, 'FrameRate': picam2.sensor_modes[0]['fps']}
 caps = {"FrameRate": (1, picam2.sensor_modes[0]['fps'], None)}
+timer = None
+
 
 def load_settings():
     _result = None
@@ -76,14 +78,25 @@ def get_value(item: str):
     return picam2.camera_controls[item]
     
 def process(request):
-    colour = (0, 255, 0)
-    origin = (0, 30)
-    font = cv2.FONT_HERSHEY_SIMPLEX
-    scale = 1
-    thickness = 2
+    global timer
+    fps = 0
+
     timestamp = time.strftime("%Y-%m-%d %X")
+
+    # Calculate Frames per second (FPS)
+    if timer is not None:
+        fps = cv2.getTickFrequency() / (cv2.getTickCount() - timer)
+
+
     with MappedArray(request, "main") as m:
-        cv2.putText(m.array, timestamp, origin, font, scale, colour, thickness)
+        # Display timestamp on frame
+        cv2.putText(m.array, timestamp, (0, 30), cv2.FONT_HERSHEY_SIMPLEX, 1, (0, 255, 0), 2)
+
+        # Display FPS on frame
+        cv2.putText(m.array, "FPS : " + str(int(fps)), (20, m.array.shape[0] - 20), cv2.FONT_HERSHEY_SIMPLEX, 1, (0, 240, 0), 2)
+
+    # Start timer
+    timer = cv2.getTickCount()
 
 if __name__ == '__main__':
     for item in items:

settings.json

@@ -1,7 +1,7 @@
 {
 "NoiseReductionMode": 0,
 "AeExposureMode": 0,
-"ExposureTime": 19029,
-"AnalogueGain": 1,
-"FrameRate": 25.000000000000007
+"ExposureTime": 12829,
+"AnalogueGain": 5.0,
+"FrameRate": 10.380000000000003
 }