Low-quality firmware often mishandles mixed codec environments, resulting in a "codec mismatch" error where the NVR records but fails to display live view. A premium firmware update will include a dynamic codec parser that identifies incoming stream types and adjusts the decoder ring buffers on the fly.
To ensure a successful update that maintains the quality and security of your system, follow these guidelines: v402r11 h264 h265 dvr nvr firmware download high quality