NVR Incoming Bandwidth: How to Size an IP Camera Recorder

Understand NVR incoming bandwidth, camera bitrate aggregation and common mistakes when adding IP cameras.

What incoming bandwidth means

NVR incoming bandwidth is the amount of camera traffic the recorder can accept for recording. It is separate from the number of camera channels and separate from display decoding capacity.

Why channel count is not enough

A 32-channel NVR is not automatically suitable for any 32 cameras. The exact model may impose limits on total incoming bitrate, supported resolutions or stream types.

Example planning logic

If 16 cameras are each configured around 4 Mbps, their combined primary streams are roughly 64 Mbps before considering additional streams or other traffic. Compare that requirement with the exact recorder specification.

Main stream and substream

The main stream is generally used for higher-quality recording while substreams can reduce viewing and decoding load. Do not assume a lower live-view load means the recording bandwidth is equally low.

Before adding a camera

Check camera codec, resolution, FPS, bitrate and stream compatibility. Then check the NVR's incoming bandwidth, supported camera resolution and decoding specifications.

Commissioning checklist

Record the final camera bitrate settings, confirm every channel is recording, test playback and verify that the recorder is not rejecting or limiting streams.