{
  "id": 15992335,
  "title": "CCTV Storage Math: H.265+ Compression Ratios, Bitrate Bitmaps & NVR HDD Sizing",
  "url": "https://urgent.news/2026/10/22/cctv-storage-math-h-265-compression-ratios-bitrate-bitmaps-nvr-hdd",
  "topic": "tech",
  "section": "Tech",
  "published": "2026-10-22T03:26:49.000Z",
  "source": {
    "name": "Dev.to",
    "slug": "dev-to",
    "url": "https://dev.to/gary_pearce_2171c679bfd81/cctv-storage-math-h265-compression-ratios-bitrate-bitmaps-nvr-hdd-sizing-52h7"
  },
  "original_language": "en",
  "account": "When setting up a multi-camera 4K CCTV system for either commercial or residential use, sizing the NVR's hard drive storage is often seen as a guessing game. If the hard drive is too small, such as 1TB for eight 4K cameras, continuous recording loops will erase crucial evidential footage within 48 hours, failing to meet the standard 30-day UK evidential retention requirement. This engineering guide delves into the calculations behind raw sensor bitrates, H.265+ smart compression techniques, and our free CCTV Storage & Bandwidth Calculator.",
  "summary": "CCTV Storage Math: H.265+ Compression Ratios, Bitrate Bitmaps & NVR HDD Sizing By Gary Pearce — Lead Electronic Security Engineer at ADI Communications (Direct: 07860 244 274) When deploying a multi-channel 4K commercial or domestic CCTV system, sizing the NVR's surveillance hard drive storage is often treated as arbitrary guesswork. Fit too small a hard drive (e.g. 1TB for eight 4K cameras), and…",
  "key_points": [
    "NVR storage sizing is often a guessing game",
    "1TB HDD insufficient for 8 4K cameras",
    "Guide explains bitrate, compression calculations"
  ],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}