DVR
Definition
Digital Video Recorder. Takes analog feeds from CCTV cameras over coax (BNC), digitises them inside the unit, and writes to internal HDDs. Common in older Indian retail, banks and police-station setups.
Related terms
- BSA 2023 Section 63
- Bharatiya Sakshya Adhiniyam 2023 Section 63 (the successor to Section 65B of the Indian Evidence Act 1872): the electronic-record certificate that authenticates...
- .Dav File
- Dahua's proprietary container format wrapping an H.264 or H.265 stream plus metadata. Cannot be opened directly by mainstream players; converted with vendor...
- H.264 (AVC)
- The dominant video codec in Indian DVR/NVR fleets in 2026. Compresses using I-frames (full picture), P-frames (forward predictions) and B-frames (bidirectional). Frame-level...
- NVR
- Network Video Recorder. Takes already-digital streams from IP cameras over Ethernet (usually PoE), and writes to HDDs in JBOD or RAID. Standard...
- Proprietary DVR File System
- A vendor-specific on-disk layout, neither FAT nor NTFS nor ext4. Records are stored as fixed-size segment files in a ring buffer with...
Explained in
- DVR/NVR and Surveillance System ForensicsDigital Video Recorder. Takes analog feeds from CCTV cameras over coax (BNC), digitises them inside the unit, and writes to internal HDDs. Common in older Indi...