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Asynchronous loading options for Mesh Delivery

Loading Mesh Delivery asynchronously makes the initial module's size as small as possible in order to minimize the video startup time. This may lead to a lower offload at the beginning of the session.


The load timing is configurable by three parameters (in decreasing order of priority):

 

  • loadAfterPlaybackStarted

  • fragmentsFetchedBeforeLoad

  • secondsPrebufferedBeforeLoad


These are mutually exclusive.
 

  • If more than one parameter is defined at the same time, only the one with highest priority is considered.

  • If no parameters are set, the module is loaded directly.


If asynchronous loading is required, the basic configuration loadAfterPlaybackStarted should be used.

 

fragmentsFetchedBeforeLoad and secondsPrebufferedBeforeLoad are more advanced and should be used for fine tuning only when the basic configuration is not enough.

 


All parameters are optional.

OPTION NAME

TYPE

DEFAULT

DESCRIPTION

loadAfterPlaybackStarted

Boolean

False

 If true, Mesh Delivery is loaded right after the video visually starts to play.

fragmentsFetchedBeforeLoad

Number

N/A

 Number of segments fetched before we load Mesh Delivery.

secondsPrebufferedBeforeLoad

Number

N/A

 Minimum number of seconds in buffer after which we load Mesh Delivery.

 

Important: Misconfiguring one of these parameters can severely impact Mesh Delivery performance and QoS.

Note: fragmentsFetchedBeforeLoad ignores the optional initialization segment(s).

Examples

                dnaConfig: {
  "loadAfterPlaybackStarted": true
}

            
                dnaConfig: {
  "fragmentsFetchedBeforeLoad": 3
}

            
                dnaConfig: {
  "secondsPrebufferedBeforeLoad": 6
}