cap. read() cannot obtain the actual frame size

[pangkun248]

I am using cv2.VideoCapture to read a variable resolution RTMP stream, but when I use OpenCV==4.6.0.66 version, I can automatically sense the shape change information of the frame. However, starting from OpenCV==4.7.0.72, I cannot sense it anymore. The shape of the read frame is always the size it was initialized to. Do you know what changes caused this?What areas of code should I modify to be able to perceive changes in size in version 4.12 or 5.0 ?