Subscriber Discussion

How Exactly Does Multicasting Work And How Does It Save On Bandwidth?

AS
Ashish Singh
•Jul 30, 2018
IPVMU Certified

We have few Rapid Deployment Camera (RDC) units that are solar powered and connected through 4G router. Bandwidth is a major concern as it is the primary cost driver. We have Axis P3228-LVE cameras attached to these units and Milestone is our VMS. What would be great way to save on bandwidth in this setting? We have the option to record on the camera (Edge Storage) at high res and stream on low res for live viewing. Some of these units can consume upto 700Mbps and are costing us a lot on data.

JH
John Honovich
•Jul 30, 2018
IPVM

Multicasting most typically saves on bandwidth when (1) you have lots of simultaneous live viewers and (2) you are inside a private network. Related: Multicasting Surveillance Tutorial

In your scenario, I believe neither of those apply.

Do you already have Zipstream enabled on the P3228-LVE? If not, that's the most important. If yes, you could consider choosing a more aggressive Zipstream setting (e.g., Axis Zipstream 2 Tested).

(1)
AS
Ashish Singh
•Jul 30, 2018
IPVMU Certified
In reply to John Honovich

Thanks for the quick response. We currently have medium Zipstream enabled on our cameras. I'll try with more extreme setting and see how it goes. If it helps, here is the current stream setting:

- Resolution: 1280x720

- Frame rate: 6 fps

- Compression: 50/100

- Zipstream: Medium

- Dynamic FPS: Off

- Dynamic GOP: Off

- P-frames: 31

- Bitrate: Variable

- H.264 profile: Main

Cheers !

JH
John Honovich
•Jul 30, 2018
IPVM
In reply to Ashish Singh

Try enabling dynamic GOP. In our testing, that is what generates the most significant part of Zipstream bandwidth savings.

(1)
AS
Ashish Singh
•Jul 30, 2018
IPVMU Certified

Will do. Thanks

UE
Undisclosed End User #1
•Jul 31, 2018

activate your zip stream technology will definitely help your bandwidth during periods of little to no change. not so much if you have lots of activity, but pretty sure you can place a cap on that as well within the camera.

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