shockwave3 0 Posted October 3, 2013 Hi, can you help me, how much HDD of disk space is needed for 24 hours recording from an analog CCTV cameras? At a rough guess. Thanks a lot. Share this post Link to post Share on other sites
Securame 0 Posted October 3, 2013 At what resolution? At how many frames per second? At what bitrate? Share this post Link to post Share on other sites
shockwave3 0 Posted October 4, 2013 Is there any formula how to count it, how much disk space is needed for recording CCTV camera? Lets say resolution: 1280x720 ,frames pers second 30 , bitrate 24 Mbit/s Share this post Link to post Share on other sites
Securame 0 Posted October 4, 2013 Well, if you know the bitrate, you can estimate. 24mbps (which is not the same as 24Mbps) would be about 3Mb per second, which would be 180Mb per minute, 10.8Gb per hour, 260Gb/day. That would be of course if the bitrate is constant, and the camera records 24 hours (no motion detection, etc). Now, you probably just made up those numbers, since 24mbps makes no sense for a 1280x720 video stream; it would not even make much sense for a 1920x1080 stream, unless you are encodeing blu-ray movies. And you also have to keep in mind that the bitrate can be constant, but it is usually better to use a variable bitrate. That means that the stream will be encoded differently depending on the movement that the camera is seeing, maybe sometimes there is a lot of action going on, but then at night nothing is happening; with a constant bitrate the video would need the same disk space day and night, with a variable bitrate it will need less disk space when there is nothing going on. Go to http://www.hikvision.com -> support -> download and check out "Disk Calculator v3.0.0.3". Someone might have a link to some online tool like that, but that is the one I use to estimate recording times. Share this post Link to post Share on other sites
