LiveTracker

A class for checking live current time and determining when the player is at or behind the live edge.

Constructor

new LiveTracker(player, optionsopt)

Creates an instance of this class.

Parameters:
NameTypeAttributesDescription
playerdefault

The Player that this class should be attached to.

optionsObject<optional>

The key/value store of player options.

Properties
NameTypeAttributesDefaultDescription
trackingThresholdnumber<optional>
20

Number of seconds of live window (seekableEnd - seekableStart) that media needs to have before the liveui will be shown.

liveTolerancenumber<optional>
15

Number of seconds behind live that we have to be before we will be considered non-live. Note that this will only be used when playing at the live edge. This allows large seekable end changes to not effect whether we are live or not.

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Methods

atLiveEdge() → {boolean}

Determines if currentTime is at the live edge and won't fall behind on each seekableendchange

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Returns:

Whether playback is at the live edge

Type: 
boolean

behindLiveEdge() → {boolean}

If we are currently behind the live edge, aka currentTime will be behind on a seekableendchange

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Returns:

If we are behind the live edge

Type: 
boolean

dispose()

Dispose of liveTracker

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handleDurationchange()

handle a durationchange event on the player and start/stop tracking accordingly.

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handleFirstTimeupdate()

handle the first timeupdate on the player if it wasn't already playing when live tracker started tracking.

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handlePlay()

handle the first play on the player, and make sure that we seek right to the live edge.

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handleSeeked()

Keep track of what time a seek starts, and listen for seeked to find where a seek ends.

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isLive() → {boolean}

Determines if the player is live, only checks if this component is tracking live playback or not

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Returns:

Whether liveTracker is tracking

Type: 
boolean

isTracking()

Whether live tracker is currently tracking or not.

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liveCurrentTime() → {number}

get what we expect the live current time to be

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Returns:

The expected live current time

Type: 
number

liveWindow() → {number}

Get the live time window aka the amount of time between seekable start and live current time.

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Returns:

The amount of seconds that are seekable in the live video.

Type: 
number

nextSeekedFromUser()

The next seeked event is from the user. Meaning that any seek

2s behind live will be considered behind live for real and liveTolerance will be ignored.

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pastSeekEnd() → {number}

The number of seconds that have occurred after seekable end changed. This will be reset to 0 once seekable end changes.

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Returns:

Seconds past the current seekable end

Type: 
number

reset_()

Stop tracking, and set all internal variables to their initial value.

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seekableEnd() → {number}

A helper to get the player seekable end so that we don't have to null check everywhere

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Returns:

The furthest seekable end or Infinity.

Type: 
number

seekableStart() → {number}

A helper to get the player seekable start so that we don't have to null check everywhere

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Returns:

The earliest seekable start or 0.

Type: 
number

seekToLiveEdge()

Seek to the live edge if we are behind the live edge

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startTracking()

start tracking live playback

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stopTracking()

stop tracking live playback

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toggleTracking()

start/stop tracking

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trackLive_()

all the functionality for tracking when seek end changes and for tracking how far past seek end we should be

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