Axis Fixes VBR / CBR Setting

Author: Ethan Ace, Published on Feb 23, 2015

Bit rate control is an important element in transmitting surveillance video. The three most common options as explained in our CBR vs VBR: Surveillance Streaming Guide are:

  • VBR - variable bit rate
  • CBR - constant bit rate
  • VBR with a cap - variable bit rate with a maximum bit rate level

Historically, Axis settings here have been misleading. Now, new firmware (5.60) has fixed this. In this note, we explain what changes they have made and what this means.

*** **** ******* ** ** ********* ******* ** ************ ************ video. *** ***** **** ****** ******* ** ********* ** ****** ** ***: ************ ********* ********:

  • *** - ******** *** ****
  • *** - ******** *** ****
  • *** **** * *** - ******** *** **** **** * maximum *** **** *****

************, **** ******** **** **** **** **********. ***, *** ******** (5.60) *** ***** ****. ** **** ****, ** ******* **** changes **** **** **** *** **** **** *****.

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

Axis '***'

**** *** ************* ****** *** *** **** * *** ******* "Constant *** ****" ** ***** ** *** ***** ***** **** a ****** ******* ******** *.**:

**** **** **** ******* **** **** ******** ********* *** *** not *** **** * ***, ***** *** ******. *** "****** bit ****" ******* **** **** ** "***" **** ******** **** as * ***, **** ******** **** ****** ** **** ***** if ********* ***** ** ***** **********.

New **** *** *** ****

***** ***** ** **** ********* ********, **** ******* *** ******** used ** ****** ***** ********** *.** (.*** ******* *****), **** "********" ** "*******" *** ****, **** ****:

******* *** **** **** ********* **** ** ******** *** **** did. *******, **** ******** ** **** **** *****, **** ** line **** *** **** ** *** ********, *** *** ***** confusion ** *** *****.

**** **** **** ******* ** *** **** * ******** *** rate **** ** ***, **** ***, ****** ****** ** ********.

Using '***' ** *** **** * ***

**** ******** ********** ***** *** **** * *** *** **** wherever ********. **** ****** ********* ** ****** *** **** ****** *** less *******, **** ** ******* ** ******** *****, *** ** may ******** ** ****** ** ****** ********** ******, *.*., ********* or **** *************.

***** *** ****** *** ******** *********** ** ***** ** **** bandwidth ****** *** ***, **** ********* ** ****** ** *****, with ****** ********* ******. ******* *** *** *** ******: ******** ********* ** ***** ** **** ****** *** **** *******.

Comments (12)

***********, * ***** ** *** **** ** ****** *** **** "constant" ** *** ****** "***********" *** * ***** **** ** luck.

****** *****, *** ******* *** ***********.

** ***** ***** *** *** **** ?

*. *** ** **** ***

*. *** **** **** ***

** *** *******?

-****

**** **** *** ******* *********** ***, *.*., *** *** ******* to ***/* ********** ** **** *** *****, **********, ***** ****, compression, ***. **.

**** ***** ***** ** **, ***** **** ******* ** ****** better **** ********.

****** ****. *** *** ***** *** ********** ************, *** *** (VBR + ***) **** ******* ** *********.

***, * ***** *** ***** ** * **** **** ** adopt. * * ****** ******* ***** ** * ******* ******** to *** *** ***. *** ** ********, *** ****** *** MBR ****** ** * ******* *** ****.

*** *** *** ******** **** ******** ** ****** "*******" ********** with **** ******* ******* ** *****. * ***** **** *** one ** *** ***** ******* ** **** *** ********* **** we've ******** *** *****. * **** ** ***** ****** **** could ****** ** * ** * **** ****** *** ***, could ***** ** ** ** **** ********* ** *****. *** CBR ********, ********* * *** ** *** * ****, **** priority ** *******, ****** ****** ** * *******. ****** *** the ****. ****'* **** **** ** *** *** ******** ***.

****, ***, *** **** ** *** **** ****** **** ****** showing ******* ***** *********:******: ******** ********* ** ***** ** ****

****, *** *** ******* ***** *** ****, ** **** *** is ******* *** ***** ****** **** ********* **** **** *** a **** ***, ***** *** *** **** ********** ******, ******* labelling ** ********.

***** ***** ** **** ********* ********, **** ******* *** ******** used ** ****** ***** **firmware *.** (.*** ******* *****), from "constant" to "maximum" bit rate, seen here:

* ** ****** ** **** *** ******* ** **** ******** change ** *** ******* ***** *** ******, *** ** *** detailed ***** ************* *.**.* ******** ******** *** *** *****.

*** *** *** ******** **?

*********, ** *** *.**.* ***** ******* ** **** ** * change ** *** ******** ** ***:

******** ******** ******* *******, *** ******** *** **** (***) **** now ****** ** ****** *** **** *******.

**** **** **** ****, ** '********' *** ****** '*******'?

* ***** ******* ** ** ******* ******* **********, ***** *** ****** ****** **.

***, **** *** * *** ********* ***** **** ******. *** paragraphs ***** *** ********** **** *** **** ** **** ******, except *** ******** ******** ** *******.

* ***** ********** **** * ***** ********** **** ****' '***' (VBR **** * *****) *** **** ** ******** *********, ******* the ** *** *** ** ***** **** *** ******** ********** that **** **** ****** ** *** ********** ** ** ********. Turns *** **** ** ******** *** ********* *****, *** ***** was ******** ******. **** ** ** ** *** **** ****'* going ** *** *** ******** *** ********* *** ********** **** his *********** ** * *** *** *** **********. ** **** applications * ********* *** (** ******* ***) ** * ***** requirement ** ******. ** **** **** *** **** ** *** US?

"* ***** ********** **** * ****** ********** **** ****' '***' (VBR **** * *****) *** **** ** ******** *********, ******* the ** *** *** ** ***** **** *** ******** ********** that **** **** ****** ** *** ********** ** ** ********."

****'* *** **********'* *******.

** *******, **** ** *** ** **** *** (*.*., **** as **** ** ** *****). ** ****** *** **********'* ***** set *** '***' ***** *** *** ** ******* **** *** customer ****** **** *** ********. **'* *** ** **** *****.

***, ** *** **** *** *** ******* *** *** *** one's *****, ****** ****** *** ***** ** ** ******* ** compression ** ***** ** ** ********* ** ********** (*** *** priority ****** ** *** **** ************* ******).

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