Thanks for you feedback. I'll try your suggestion & let u know.The compression type is set in the camera. With Dahua cameras, the NVR lets you configure the camera using the NVR's GUI. I wouldn't know if this works via onvif, but I'd almost be surprised if it does. If the Sibell camera is built by Dahua you might have a chance of configuring it in the nvr via the "private" manufacturer protocol. I've heard that one manufacturer's h.265 isn't necessarily the same as another's, so that issue could maybe crop up.