Testing Bandwidth vs Frame Rate

Author: Benros Emata, Published on Aug 30, 2011

Frame rate selection has a major impact on bandwidth consumption for surveillance cameras. While most cameras have a maximum frame rate of 25 to 30 frames per second, users typically choose significantly lower frame rates, driven by a desire to minimize storage consumption. The most direct way to reduce storage is to use a lower bit rate stream for each camera with lower frame rates.

A key practical question is how much bandwidth is saved as the frame rate is dropped? Lower frames rates should result in lower bit rates but how significant are those changes and does this change depending on the scene?

Our Test

In this report, we share our result of a series of experiments we did with 3 IP cameras (Avigilon, Axis and Sony) in 3 different scenes: (1) indoor daytime, (2) indoor dark (< 1 lux), and (3) daytime outdoor (intersection). We did tests at 1, 5, 10, 15 and 30 fps to see how bandwidth consumption varied across a variety of frame rates.

We then produced a series of charts comparing bitrate vs frame rate and average frame size vs frame rate to provide two views on the relationship between these parameters.

With these test results, we answer the following questions:

  • How does bandwidth efficiency vary with changes in the frame rate?
  • Are low frame rate streams inefficient?
  • How can you project bandwidth consumption for various frame rates?
  • Does different scene types impact bandwidth vs frame rate efficiency?
  • How does the choice of VBR vs CBR impact the relationship between bandwidth and frame rate?

For background on frame rates, Pro members should review our frame rate fundamentals training. Also, for those interested in understanding the impact of bandwidth, review our sister report that examines the relationship between bandwidth and image quality.

***** **** ********* *** * ***** ****** ** ********* *********** for ************ *******. ***** **** ******* **** * ******* ***** rate ** ** ** ** ****** *** ******, ***** ********* choose ************* ***** ***** *****, ****** ** * ****** ** minimize ******* ***********. *** **** ****** *** ** ****** ******* is ** *** * ***** *** **** ****** *** **** camera **** ***** ***** *****.

* *** ********* ******** ** *** **** ********* ** ***** as *** ***** **** ** *******? ***** ****** ***** ****** result ** ***** *** ***** *** *** *********** *** ***** changes *** **** **** ****** ********* ** *** *****?

Our ****

** **** ******, ** ***** *** ****** ** * ****** of *********** ** *** **** * ** ******* (********, **** and ****) ** * ********* ******: (*) ****** *******, (*) indoor **** (< * ***), *** (*) ******* ******* (************). We *** ***** ** *, *, **, ** *** ** fps ** *** *** ********* *********** ****** ****** * ******* of ***** *****.

** **** ******** * ****** ** ****** ********* ******* ** frame **** *** ******* ***** **** ** ***** **** ** provide *** ***** ** *** ************ ******* ***** **********.

**** ***** **** *******, ** ****** *** ********* *********:

  • *** **** ********* ********** **** **** ******* ** *** ***** rate?
  • *** *** ***** **** ******* ***********?
  • *** *** *** ******* ********* *********** *** ******* ***** *****?
  • **** ********* ***** ***** ****** ********* ** ***** **** **********?
  • *** **** *** ****** ** *** ** *** ****** *** relationship ******* ********* *** ***** ****?

*** ********** ** ***** *****, *** ******* ****** ****** ******** **** ************ ********. ****, *** ***** ********** ** ************* *** ****** ** bandwidth, ****** *** ****** ****** **** ******** *************** ******* ********* *** ***** *******.

[***************]

Key ******** *** ***************

*** ********:

  • ********* ********** ** ***** ***** ***** *** ** ******** **** efficient **** ****** ***** ***** **** *** * ***** ******** or ***** ********** ** ***
  • ** *** ***** ******* **** ******* (*.*., *********, ***** *****), bandwidth ********* ****** ******** ** ***** **** *********
  • ** '*******' ********* ********* ***** *** *** ***** **** *.*** encoding
  • ******** *** *** ***** ******* *** * *** ****** ** different ***** ***** ** ****

***************:

  • ****** **** ***** ** ***** ****** (*.*., ****** ******), *** can ****** *** ****** ** ***** * ***** ********* ** low ***** ***** ********* ********* **********
  • **** ** ****** ****** **** ***** * ***** *********, ********* consumption ** *** * **** ******* ** *** ******* **** be ***** *** ********** (****** **** *** ** **** **** low)
  • **** ********** *********, ***** * ***** ***** **** ** ********* a **** ************* *** ** ******* ******* ******* ***** ** off ** ** ** **% ** **********.
  • **** ***** ***, ** ********, *** ******* ** *** **** first ** *** * ******** ********* ***** *** *** **** as **** *** *******. *************, ****** * *** ****** ***** at ********* *** *** *****, *** **** ** * ****** analyzer *** **** *** *** **** **** ******* ** * DRF ** ** ** ****

VBR ****** ******* (***-**********)

***** ********

** **** ****** ******* ******** *** ***** ** ****** ***-*******. Both ******* ******* ** ***, *** ****** ** ***** *-***** intervals. *** ******** ** ***** * ** *-***** ********, ******* the **** ********* ** *-***** *** ***** ** ******.

******* **. *****-****

*** **** ****** ** ************ **** ********* ** *** ***** frames **** *** ******** ******. **** ** ******* ******* *** I-frame ******** ** *********** ****** ** *** ******** ** ***** frame ***** (** **** *** ***** ** ******** ** **** I-frames ** ~**:*). ** ************* ***** *** ******** ** *** two ******* ******** ******* * *:* *-***** *****. ******* *** point **** *** *** ** ** ******* **** *** ***** of *** ******, ** **** ******** ******** **** **** ********. As **** ********** ******** ** ****** *****-***** (********** *** ********, which **** * *** ****** *-***** ********).

******* ***** ****

** *** ***** ***** ***** *** ************ ** *** ****** I-frame ******** ** ***** ********. *** ******** ***** (***) ********* a ************ **** (** *****) *** *-****** ******** ** *-******. This *********** ** ************** ** **** ******* ******, ***** *-****** are ********** ********* ** ******* (around ***** ** ******* ****. *** ****** **** ******** ** descend ** * ******* ** ***** ** ~***. ** ***** P-frame ***** ******** *** ******* ***** **** ****** (~**:*). **** a ***** ** ~*** ** ******** * *** ********** ***** and **** *********** ************.

VBR ****** ********* (****-**********)

***** ********

** **** ****** ********* ******** *** ***** ** ****** ******* due ** *** ******** ** *****/****. **** ******* ******* ** VBR, *** ****** ** ***** *-***** *********. *** ******** ** using * ** *-***** ********, ******* *** **** ********* ** I-frame *** ***** ** ******.

******* **. *****-****

** *** *** *****-***** *** *-***** ********* ******* *** *** cameras *** **** ***********. *** *******, ** **** *** ******** produces *** *-***** *** ***** *** *-***** (** * ***** second), *** *** **** ****** ******** *** *-***** *** ***** 31 *-****** (** * ***** ** *******). ** **** ** would ****** ** *** ********** ** ***-***** ** ***** ***** frame-rate ******, *** **** ** *** *** **** ** *** curves ****** **** ***** ** **** ********* *******. ** ** clear **** *********** ********** ** **** *** *** ** *** complexity ***** ** *** ***** *** **** ****-**** **** ** P-frames ** *** **** '*******' **** *-******, ** * ******. A *** ******* ** ***** ****** ** *** ****** ************ between ******* *** *****-****, ********** ** ***** *****-**** ***** ********** is ** *** ********.

******* ***** ****

*** ******* ***** ***** ** *** *** ******* ** ~**** to ~**** ** ************ ****** **** *** ~*** ******* ***** in *** ***-******* ****** ******* *****. *** **** *********** ******* of **** ***** ** *** ******** ******** ** *** ******** (red) *****. ******* *** ******** ******* ***** **** ** ********** strongly ** *-***** **** ** ***** *****-***** *** ** *-***** sizes ** ****** *****-*****, *** ***** ********* *** ******** ***** of * **. * ******. ***** **** *** ***** ** mostly **** ******** ****** ******** ********** ******* * *** * frame *****. **** ** ************** *** ******** ******** ** ****** complex ******. ** * ****** ***** ** ** ***** *****-**** that ** **** ********* *** ** *** ******** ***** ******* bitrates ******** ****** ******** ** *****-***** *** *********.

VBR ******* ************ (********** **** **********)

***** ********

** **** **** ************ ******** *** ***** ** ********** **** in **********. **** ******* ******* ** ***, *** ****** ** their *-***** *********. *** ******** ** ***** * ** *-***** interval, ******* *** **** ********* *** *-***** ** ***** ** frames.

******* **. *****-****

** ** *** ****** ******* ********* ********, *** ****** ** the *** ******* ******* ** ***** **** ** ***** ** divergence. ***** ******* ****** *** ******** ***** ******* ** **** frame-rate *******. *** ******** ***** * **** ** ~***** ** 30fps, ***** ** ************ ***** **** ~*.***** **** ******** ****** the **** ******* ********* *****. **** ***** ** ******* * somewhat ***** ***** ** ********** **** *** ***** *****.

*** ***** ** *** ***** ***** ** ******* *** ***** from ***** ** ****** *****-*****, ********** **** ********** ***** ** the ****** *-***** ********* *****-*****.

******* ***** ****

** ******** *** ******** ******, ***** **** * * *** second *-***** ********, ******** * ******* ******* ** ******* ***** size ** ***** ***** ********. *** ****** ******* ***** **** range ** *** ******** (~**** ** ~****) ******** **** *********** efficiencies *** ***** ** ******** ** ******** *** ***** ** I-frames ** *-****** (*.*., ******** ***), *** **** *** ***** is *** ** ******* ** *** ********* *****.

*** **** ***** (****) ** ******** ********* ** *** *- to *-***** ***** ** * ********, *** ** **** ** would *** ****** *** ***** ** ** ** **** ** experienced **** ** *** ************ ********. ****** *** ****' ***** was ~*** ** *** ******* *** ********* ****** ****** *** ~10KB ***** **** **** (**** ** ****).

CBR ********** *** ******* **. *****-**** *************

******* *** ***** ******* *** * ********** ***** **** ** significantly ****** ** *** **** ** ***. **** ***, *** camera ************* ******* *** *********** *** **** **** *** ****** a ********* ***** ****. ** ********, **** ***, *** ***** has ** ******** ****** *** *** ****. *** *******, **** a ****** **** ** ****, ** *** ******* *** **** is ***/*, ** *** ****** *** ***** **** **** *** default ** ** ** **, *** *** **** ***** *** same. **** ******* ** **** *** ****** **** ******** *** compression (** ************ *****) ** ******** *** ****** ** **** in *** *****. *** *** ********* ******** ** **** **** can ***** *********. ** * ******* *****, ********** ************ ****** have ****** ** ** ********* ******. **** **, *** ************ loss ********* *** *** ***** *** ************* ** *** ***** eye. *** ********** ** ****, ****** ****** ************ ** ***** ******* ********** **** **** *** ***** ** ************.

**** ***** ***, ** ********, *** ******* ** *** **** first ** *** * ******** ********* ***** *** *** **** as **** *** *******. *************, ****** * *** ****** ***** at ********* *** *** *****, *** **** ** ******* *********** **** *** *** **** **** ******* ** * *** of ** ** ****. *** ***** ****, *** ****, *********** is ** ****** *** ********* *** *** *****, **** *** sample ****** *** ****** *** ****** ********* ***** ***** *** cannot **** *** ******** *********** ** *******.

***********

**** *** *** ******* **** ** '********* **. *****-****' ******:

***

***

  • **** *****(****** $***) - **** */*; */*" ****; **.* *******; *.* Lux (**)

**** *** *** ******** ******** ** **** ******:

  • ******** *.***-**-****-** - ** *.*.*.*(****)
  • **** ***** - ** *.**.*
  • **** ***** - ** *.**.**

*** *** ***** *** *** (*) ******* **** **** ** their ******* *** **************. *** **** ** *** ***** *** scenes (******* ******, ********* ******, *** **** ************), *** ******* were ******** ** ********* *****-***** (*, *, **, **, *** 30 ***). ******* ***-***** *** ******* ***** ***** **** ******** for ******** ****** **** ********.

Login to read this IPVM report.
Why do I need to log in?
IPVM conducts unique testing and research funded by member's payments enabling us to offer the most independent, accurate and in-depth information.

Related Reports on Bandwidth

48MP 180 Camera (Digital Watchdog) Test on May 10, 2017
Camera resolution continues to advance, with Digital Watchdog offering the MegaPIX PANO 48MP 180° camera, the highest resolution mainstream camera...
Last Day - IP Networking Course May 2017 on Apr 26, 2017
Today is the last day to register for the May IP Networking Course. This is the only networking course designed specifically for video...
Hanwha Lowest Cost WiseNet X Camera (XND-6010) Tested on Apr 13, 2017
IPVM bought and tested the lowest-cost WiseNet X model, the indoor 2MP fixed focal XND-6010 dome, continuing our testing of Hanwha's new WiseNet X...
Pelco Surevision 3 Tested on Apr 12, 2017
Pelco has released generation 3 of its Surevision cameras, claiming improved performance in both super low light and WDR performance. We bought...
TVI 4.0 Doubles HD Analog Bandwidth on Mar 05, 2017
HD analog's move up market continues. Starting a few years ago at just 720p, HD analog is now poised for 4K and beyond. Techpoint, the company...
Arecont Vision MicroDome Duo Tested on Feb 14, 2017
Arecont Vision is back with another multi-head camera, this time thinking smaller with the MicroDome Duo, a two-imager model, with the tagline...
Camera Course Winter 2017 on Feb 02, 2017
Learn video surveillance and get certified. IPVM provides live online classes, recorded videos, personal help, cutting edge education and...
Arecont Lowest Favorability Results on Jan 25, 2017
Given Arecont is 3 time defending integrator choice for worst camera manufacturer, it should be little surprise they had the lowest score in the...
Avigilon Pro 4K Camera Tested on Jan 03, 2017
Avigilon is best known for their large sensor, high megapixel cameras. But with new offerings from Sony and soon Axis, the questions is how well...
IP Networking 2017 Book Released on Jan 02, 2017
The new IP Networking Book 2017 is a 197 page in-depth guide that teaches you how IT and telecom technologies impact modern security systems. The...

Most Recent Industry Reports

Pelco Shutting Down Clovis Line, Laying Off 200 on May 22, 2017
Pelco's Clovis facility once turned out some of the industry's most popular products. Now, the facility is mostly building "obsolete" equipment,...
IP Camera - 15 Year Shootout on May 22, 2017
How far have IP cameras come? We bought and tested 4 cameras across the past 15 years to understand how much and where performance has...
Remote Video Monitoring Providers Directory on May 21, 2017
Remote video monitoring can help integrators generate RMR plus end users lower their security costs and/or improve response to critical...
Axis Criticizes OEMs: "When You Buy An Axis Camera, An Axis Camera Is What You Get!" on May 19, 2017
When you buy a Honeywell camera, you likely get a Hikvision, Dahua or some other company's product. The same goes for easily 100 different...
Hackable 125kHz Access Control Migration Guide on May 19, 2017
Despite being one of the most popular credentials, 125 kHz credentials are easily copied and insecure as we showed in our test results, video...
Forget The Backdoor, "ALL HIKVISION PRODUCTS" On Sale on May 18, 2017
Less than 2 weeks after the Hikvision Backdoor was confirmed, Hikvision has launched a sale "ON ALL HIKVISION PRODUCTS". In this note, we examine...
Amazon Techs Installing IP Cameras Tested on May 18, 2017
In 2015, Amazon started offering video surveillance installation. Now, Amazon has made it a lot easier, with automatic add-on options and...
Hanwha Recorder Vulnerability Analyzed on May 18, 2017
ICS-CERT has released a vulnerability notice for Hanwha SRN-4000 recorders.  Hanwha provided additional information to IPVM about this issue,...
DMP Video Doorbell / Access Reader Examined on May 17, 2017
Consumers increasingly demand video doorbells, with "doorbells selling like hotcakes, everyone wants a doorbell", according to ADT's CEO. At ISC...
ShotSpotter To IPO, Facing Low Revenue and Losses on May 17, 2017
A rare event for North American security manufacturers is upcoming. ShotSpotter is planning to IPO on the NASDAQ, aiming to raise $34.5...

The world's leading video surveillance information source, IPVM provides the best reporting, testing and training for 10,000+ members globally. Dedicated to independent and objective information, we uniquely refuse any and all advertisements, sponsorship and consulting from manufacturers.

About | FAQ | Contact