I bought a batch of 16 cameras from a manufacturer, but their firmware is blocked for other VMS that are not from the manufacturer. I would like to obtain a firmware that I can change and make the camera open on other vms.
The camera is this one from the manufacturer's website: Câmera IP Bullet Metal POE 5MP 30M Sony Starvis - M3 IB530 - Giga

Where can I find the unlocked firmware?
The camera is this one from the manufacturer's website: Câmera IP Bullet Metal POE 5MP 30M Sony Starvis - M3 IB530 - Giga

Where can I find the unlocked firmware?