The length of time that a certain amount of storage can record video is mainly related to the format bandwidth of the video:
CIF single channel bandwidth 256kb
4CIF single channel bandwidth 512kb
720p30 single channel bandwidth 768kb
1080p30 single channel bandwidth 1M
1080p60 single channel bandwidth 2M
1T hard disk, if you open a single stream 720p30, the calculation method is: 1024 * 1024 * 1024 * 8 / (768 + 512) / 60 / 60 / 24 = 77.7 (days)
If it is dual stream 720p30, the calculation method is: 1024*1024*1024*8/(768*2+512)/60/60/24 = 48.5 (days)
Other formats can also be calculated based on this formula.
