Firmware versions prior to V4.000.0000000.1.R.20210320 have a memory leak in the H.265 decoder when using SmartPSS or CMS, causing the DVR to freeze after 5–7 days of continuous recording.
New firmware often adds support for higher-resolution Cooper series cameras or improved H.265+ video compression. xvr1b04hi firmware
XVR1B04HI-FW-TECH-REP-001 Subject: Comprehensive Firmware Analysis & Recovery Guide Device Type: HDCVI / Analog & IP Hybrid Digital Video Recorder Product Series: XVR1 Series (Lite/Value Series) Chipset: Hi3520D / Hi3536D (Common for this tier) Firmware versions prior to V4
Automatically recognizes the signals of front-end cameras (HDCVI, AHD, TVI, CVBS) without manual configuration. Long Distance Transmission: xvr1b04hi firmware