Type Alias: ThroughputSelectorOptions

type ThroughputSelectorOptions = object;

Defined in: ThroughputSelectorOptions.ts:10

Beta

The options of createThroughputSelector.

Both factors must be finite numbers above 0 and at most 1, and upgradeFactor must not exceed safetyFactor. The tolerance must be a finite number of 0 or more. createThroughputSelector throws a RangeError for an invalid option.

Properties

safetyFactor?

safetyFactor?: number;

Defined in: ThroughputSelectorOptions.ts:18

The fraction of the effective throughput that a rung may use. The selector picks the highest rung at or below effectiveThroughput * safetyFactor. hls.js and shaka-player use 0.95. dash.js uses 0.9.

Default Value

DEFAULT_SAFETY_FACTOR

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starvationTolerance?

starvationTolerance?: number;

Defined in: ThroughputSelectorOptions.ts:37

The seconds of stall that the second pass of the starvation guard allows, capped at the segment duration. The second pass runs when no rung downloads before the buffer empties. hls.js uses 4 as maxStarvationDelay.

Default Value

DEFAULT_STARVATION_TOLERANCE

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upgradeFactor?

upgradeFactor?: number;

Defined in: ThroughputSelectorOptions.ts:28

The fraction of the effective throughput that a higher rung may use. An upgrade needs the new rung at or below effectiveThroughput * upgradeFactor. A value equal to safetyFactor disables the hysteresis. hls.js uses 0.7 for the same rule.

Default Value

DEFAULT_UPGRADE_FACTOR