Merge pull request #3779 from LDOUBLEV/fix_trt_res

Fix trt rec warmup

tools/infer/predict_rec.py

@@ -278,7 +278,7 @@ def main(args):
     if args.warmup:
         img = np.random.uniform(0, 255, [32, 320, 3]).astype(np.uint8)
         for i in range(2):
-            res = text_recognizer([img])
+            res = text_recognizer([img] * int(args.rec_batch_num))
 
     for image_file in image_file_list:
         img, flag = check_and_read_gif(image_file)