H.264 DVR User Manual
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Contents
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Digital Video Recorder User Manual105Appendix B Calculate Recording CapacityUsers can calculate the size of hard disk according to the saving time and DVR recording settings. The DVR uses fixed video bit rate. The beloware the details at different settings.Video Format Resolution Frame RateTotally(FPS) Video Quality Bit Rate (kbps) Used Space(MB/h)NTSC CIF 30Highest 1M 465Higher 768k 297Medium 512k 230Low 384k 173Lower 256k 115Lowest 128k 56PAL CIF 25Highest 1M 466Higher 768k 295Medium 512k 235Low 384k 175Lower 256k 56.4Lowest 128k 45The calculation format is:Total Recording capacity =Used space per hour (MB/h) (coverage rate of hard disk) × recording time (hour) ×channel numbersFor instance, one customer uses PAL cameras, set resolution to CIF, video quality to Lower, frame rate to 25 fps for enabling total 16 channels. Hewants the unit to record continuously in a month. Below is the calculation:Total Recoding capacity =56.4 (mb/h) X 24(hours/day) X30(days) X16(channels)= 649728(MB)≈650(GB)Therefore, customers just install two SATA HDDs with 320GB, it can almost record for one month. |
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