fix release/2.1 import problem (#3618)

static/deploy/python/infer.py

@@ -34,7 +34,7 @@ import cv2
 import numpy as np
 import paddle
 import paddle.fluid as fluid
-from preprocess import preprocess
+from preprocess import preprocess, Resize, Normalize, Permute, PadStride
 from visualize import visualize_box_mask, lmk2out
 
 # Global dictionary
@@ -507,7 +507,9 @@ def predict_video(detector, camera_id):
     fps = 30
     width = int(capture.get(cv2.CAP_PROP_FRAME_WIDTH))
     height = int(capture.get(cv2.CAP_PROP_FRAME_HEIGHT))
+    # yapf: disable
     fourcc = cv2.VideoWriter_fourcc(*'mp4v')
+    # yapf: enable
     if not os.path.exists(FLAGS.output_dir):
         os.makedirs(FLAGS.output_dir)
     out_path = os.path.join(FLAGS.output_dir, video_name)