When it comes to planning CCTV storage, many engineers, installers, and even DIY enthusiasts rely on online calculators. But here’s the hard truth: most of them give inaccurate results.
Here’s why:
1. They Use Fixed Bitrates
Many calculators assume that every 1080p camera always uses the same bitrate. In reality, bitrate depends on codec, motion activity, and scene complexity. A camera overlooking a busy street generates far more data than one covering a quiet office.
2. They Ignore Motion Detection & AI Analytics
Modern cameras often use motion-based recording or AI-driven analytics. If a calculator doesn’t account for this, storage can be overestimated by 50% or more, or underestimated if AI adds extra data.
3. They Don’t Adjust for Retention & Recording Hours
Some calculators assume 24/7 recording by default, or they ignore your required retention days. Even a few extra days of storage can mean hundreds of gigabytes or terabytes difference.
4. They Don’t Factor in Real-World Codec Efficiency
Codecs like H.265+ and Smart Codec (AI-optimized) dramatically reduce file size, but legacy calculators may only support H.264, giving unrealistic storage estimates.
5. They Overlook Multiple Camera Systems
When multiple cameras are recording simultaneously, total storage and bandwidth requirements multiply, but not all calculators handle multiple camera setups correctly.
How to Avoid Wrong Calculations
Use a modern, all-in-one tool like SafeViewTech CCTV Storage & Bandwidth Calculator. It factors in:
- Codec type (H.264, H.265, H.265+, Smart Codec)
- Video quality and frame rate
- Motion detection & AI analytics
- Recording hours per day and retention period
- Multiple cameras
Pro Tip: Always simulate your real-world scenario, not just default values. A little extra planning now can save thousands of dollars in storage upgrades later.