SourceBuffer

For additional information, see https://www.w3.org/TR/media-source-2/#sourcebuffer.

Extends

• EventTarget

Properties

mode

mode: AppendMode

Get or set the append mode. For additional information, see https://www.w3.org/TR/media-source-2/#dom-sourcebuffer-mode.

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updating

readonly updating: boolean

Checks if Source Buffer is upating track buffers. For additional information, see https://www.w3.org/TR/media-source-2/#dom-sourcebuffer-updating.

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buffered

readonly buffered: TimeRanges

Gets the Time ranges of the buffered media. For additional information, see https://www.w3.org/TR/media-source-2/#dom-sourcebuffer-buffered.

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timestampOffset

timestampOffset: number

Get or set the timestamp offset to be applied to every coded frame. For additional information, see https://www.w3.org/TR/media-source-2/#dom-sourcebuffer-timestampoffset.

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audioTracks

readonly audioTracks: AudioTrackList

Gets the audio track list. For additional information, see https://www.w3.org/TR/media-source-2/#dom-sourcebuffer-audiotracks.

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videoTracks

readonly videoTracks: VideoTrackList

Gets the video track list. For additional information, see https://www.w3.org/TR/media-source-2/#dom-sourcebuffer-videotracks.

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textTracks

readonly textTracks: TextTrackList

Gets the text track list. For additional information, see https://www.w3.org/TR/media-source-2/#dom-sourcebuffer-texttracks.

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appendWindowStart

appendWindowStart: number

Get or Set the append window start position in seconds. For additional information, see https://www.w3.org/TR/media-source-2/#dom-sourcebuffer-appendwindowstart.

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appendWindowEnd

appendWindowEnd: number

Get or set the append window end position in seconds. For additional information, see https://www.w3.org/TR/media-source-2/#dom-sourcebuffer-appendwindowend.

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onupdatestart

onupdatestart: EventListener

For additional information, see https://www.w3.org/TR/media-source-2/#dom-sourcebuffer-onupdatestart

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onupdate

onupdate: EventListener

For additional information, see https://www.w3.org/TR/media-source-2/#dom-sourcebuffer-onupdate

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onupdateend

onupdateend: EventListener

For additional information, see https://www.w3.org/TR/media-source-2/#dom-sourcebuffer-onupdateend

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onerror

onerror: EventListener

For additional information, see https://www.w3.org/TR/media-source-2/#dom-sourcebuffer-onerror

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onabort

onabort: EventListener

For additional information, see https://www.w3.org/TR/media-source-2/#dom-sourcebuffer-onabort

Methods

appendBuffer()

appendBuffer(data: ArrayBuffer | Uint8Array<ArrayBufferLike>): void

Append the media segment. For additional information, see https://www.w3.org/TR/media-source-2/#dom-sourcebuffer-appendbuffer.

Parameters

data

ArrayBuffer | Uint8Array<ArrayBufferLike>

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abort()

abort(): void

Abort the source buffer operations. For additional information, see https://www.w3.org/TR/media-source-2/#dom-sourcebuffer-abort.

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changeType()

changeType(type: string): void

Change the mime type of the source buffer.

https://www.w3.org/TR/media-source-2/#dom-sourcebuffer-changetype

Parameters

type

string

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remove()

remove(start: number, end: number): void

Remove the media samples from the internal track buffer queue between start and end timestamp positions. For additional information, see https://www.w3.org/TR/media-source-2/#dom-sourcebuffer-remove.

Parameters

start

number

end

number

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Last updated: Jul 22, 2026