In fact, the monitoring camera does not have playback software, but the back-end acquisition, display and storage parts support playback software. Analog monitoring is called hard disk video recorder or video capture card, and digital monitoring is called NVR or integrated management platform. Whether it is hard disk video recorder, video capture card, NVR or integrated management platform, every product and manufacturer has its own software. Now the multi-channel monitoring and playback function is more popular, and ordinary regular products can support it.