Update inference.py

inference.py

@@ -334,6 +334,8 @@ def do_associative_tracking(raw_detections, image_meter_width, image_meter_heigh
 
     if (gp): gp(0, "Tracking...")
 
+    print("Preprocessing")
+
     low_dets = []
     high_dets = []
     for batch in raw_detections:
@@ -348,6 +350,7 @@ def do_associative_tracking(raw_detections, image_meter_width, image_meter_heigh
             low_dets.append(low_frame)
             high_dets.append(high_frame)
 
+    print("Preprocess done")
 
     # Initialize tracker
     clip_info = {