[Python] Trying to send commands to Sony FCB-EV7520 camera

I am trying to send zoom commands, or any other commands to this camera:

Sony FCB-EV7520

I followed the instruction in their manual and tried to implement it in a Python script, but the none of the commands will work.

When I go to its web page, and I use it to send the same messages for zoom in and out, it works perfectly.

This is my current code: *I hide the actual camera information

import cv2
import socket
import time

# Camera details
username = "****"
password = "****"
camera_ip = <IPADDRESS>
camera_port = <PORT>
rtsp_url = f"rtsp://{username}:{password}@{camera_ip}:8554/bandwidth_h264"

# VISCA commands
address_cmd = bytes.fromhex("88 30 01 FF") # Set address command
if_clear_cmd = bytes.fromhex("81 01 00 01 FF") # IF_Clear command
zoom_in_msg = bytes.fromhex("81 01 04 07 02 FF") # Zoom in command
zoom_out_msg = bytes.fromhex("81 01 04 07 03 FF") # Zoom out command

def send_visca_command(cmd):
with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as sock:
sock.connect((camera_ip, camera_port))
sock.sendall(cmd)
time.sleep(0.1)

def initialize_camera():
# Send Address command to set the camera's address
send_visca_command(address_cmd)
time.sleep(1)

# Clear command buffers in the camera
send_visca_command(if_clear_cmd)
time.sleep(0.5)

def main():
# Initialize camera settings
initialize_camera()

# Open RTSP stream
cap = cv2.VideoCapture(rtsp_url)

if not cap.isOpened():
print("Error: could not open RTSP stream")
return

while True:
ret, frame = cap.read()

if not ret:
print("Error: Failed to capture frame.")
break

cv2.imshow('RTSP Stream', frame)

key = cv2.waitKey(1) & 0xFF
if key == ord('q'):
break
elif key == ord('+'):
send_visca_command(zoom_in_msg)
print("Zoom in command sent.")
elif key == ord('-'):
send_visca_command(zoom_out_msg)
print("Zoom out command sent.")

cap.release()
cv2.destroyAllWindows()

if __name__ == "__main__":
main()

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