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SourceBuffer: appendBufferAsync() method

files/en-us/web/api/sourcebuffer/appendbufferasync/index.md

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{{APIRef("Media Source Extensions")}}{{AvailableInWorkers("window_and_dedicated")}}{{Non-standard_Header}}{{SeeCompatTable}}

The appendBufferAsync() method of the {{domxref("SourceBuffer")}} interface begins the process of asynchronously appending media segment data from an {{jsxref("ArrayBuffer")}}, a {{jsxref("TypedArray")}} or a {{jsxref("DataView")}} object to the SourceBuffer object. It returns a {{jsxref("Promise")}} which is fulfilled once the buffer has been appended.

Syntax

js-nolint
appendBufferAsync(source)

Parameters

  • source
    • : Either an {{jsxref("ArrayBuffer")}}, a {{jsxref("TypedArray")}} or a {{jsxref("DataView")}} object that contains the media segment data you want to add to the SourceBuffer.

Return value

A {{jsxref("Promise")}} which is fulfilled when the buffer has been added successfully to the SourceBuffer object, or null, if the request could not be initiated.

Examples

This simplified example async function, fillSourceBuffer(), takes as input parameters buffer, an {{jsxref("ArrayBuffer")}}, a {{jsxref("TypedArray")}}, or a {{jsxref("DataView")}}, and a SourceBuffer object to which to append the source media from the buffer.

js
async function fillSourceBuffer(buffer, msBuffer) {
  try {
    while (true) {
      await msBuffer.appendBufferAsync(buffer);
    }
  } catch (e) {
    handleException(e);
  }
}

Specifications

This feature is not part of any specification. It is not on track to become a standard.

Browser compatibility

{{Compat}}

See also