A: The calculation formula for the hard disk space occupied by each channel per hour: [Video bit rate (128-2048)/8*3600]/1024
For example: If the code rate is set to 512K, then the hard disk space occupied by each video channel per hour is as follows:
[512/8*3600]/1024=225MB
B: Space per channel per day [GB]: A*24
For example: If the code rate is set to 512K, then the daily hard disk space per video channel per hour is as follows:
[225MB*24]/1024=5.2734G
C: The space occupied by 16 DVRs a day: B*16
For example, if the 16-channel hard disk video recorder is set to 512K, the space occupied by one day is as follows:
16*5.2734G=84.3744GB
If you press a 500G hard disk, video data needs to be stored for 60 days, the side needs the following hard disks:
[60*84.3744GB]/[500*0.90]=11.3
Note:
1, in the above calculations, [500 * 0.90] means to take the actual capacity of the hard disk can be applied to, we usually refer to the size of the hard disk actually refers to its physical size [equivalent to the house's building area], in Due to hard disk partitioning,
Temporary exchange of data takes up a small part of the space, so in practice we usually take 90% of it as actual space available.
2. In places where the video quality is not high, the general stream is set to a fixed stream of 256K. Each hour, each video channel occupies 113MB of hard disk space.
3, in the video quality requirements of the site is relatively high code stream is usually set to a fixed stream above 512K (D1 quality generally requires 2048K or so), can also be set in the DVR variable stream, when set to variable When the stream is streamed, the host automatically adjusts the stream according to the current picture motion of each channel to achieve the best effect of the video. At this time, it is difficult to estimate the exact value of the video when occupying the space.
4, often our customers want to save the video quality can not be too bad, but also want to occupy the hard disk space is relatively small, where we can set the host as a variable stream, and then set a limit to the stream value.