Reduce Bandwidth Consumption for Video Surveillance (LAN Environment)
1.Encoding Settings
Adopt H.265 / H.265+ instead of H.264. Use VBR (Variable Bit Rate) mode. Lower frame rate to 10ā15 fps for non-critical areas. Extend GOP/I-frame interval to 50ā100. Enable 3D noise reduction to avoid bitrate surge at night.
2. Dual-stream Deployment
Main stream for local NVR recording. Sub stream for client preview and video wall cycling. Do not pull main stream for routine viewing.
3. LAN Transmission Optimization
Use multicast if multiple terminals view the same camera channel. Enable IGMP Snooping on switches to prevent multicast flooding. Terminate unused video streams to avoid persistent traffic. Limit concurrent preview channels to prevent port congestion. Isolate surveillance traffic from office network via VLAN.
4. Recording Strategy
Enable motion detection recording for general zones instead of 24/7 continuous recording.
5. Common Pitfalls
Avoid CBR mode in LAN. Do not shorten I-frame interval unnecessarily. Disable unnecessary dynamic OSD overlays which increase bitrate.