increase trt workspace size to 32M while using dcn trt plugin (#4629)

deploy/python/infer.py

@@ -537,7 +537,7 @@ def load_predictor(model_dir,
     }
     if run_mode in precision_map.keys():
         config.enable_tensorrt_engine(
-            workspace_size=1 << 10,
+            workspace_size=1 << 25,
             max_batch_size=batch_size,
             min_subgraph_size=min_subgraph_size,
             precision_mode=precision_map[run_mode],
@@ -680,7 +680,7 @@ def predict_video(detector, camera_id):
     if not os.path.exists(FLAGS.output_dir):
         os.makedirs(FLAGS.output_dir)
     out_path = os.path.join(FLAGS.output_dir, video_out_name)
-    fourcc = cv2.VideoWriter_fourcc(*'mp4v')
+    fourcc = cv2.VideoWriter_fourcc(* 'mp4v')
     writer = cv2.VideoWriter(out_path, fourcc, fps, (width, height))
     index = 1
     while (1):