Convert *.h5 (keras model) into *.pb and *.pbtxt (tensorflow model), and load them by opencv dnn

[namnguyenphuong10]

I converted completely keras model (full yolo v2) into tensorflow model, then i loaded them by tensorflow and carried out exactly however i can not load them by cv2.dnn.readNetFromTensorflow().
I got a problem while loading tensorflow model by using dnn.

Code bellow:

import cv2
net = cv2.dnn.readNetFromTensorflow('model.pb', './model.pbtxt')

error: OpenCV(4.2.0) /io/opencv/modules/dnn/src/tensorflow/tf_importer.cpp:663: error: (-215:Assertion failed) const_layers.insert(std::make_pair(name, li)).second in function 'addConstNodes'

Did anyone get the same issue and seek out solutions? Thanks a lot.