SourceBuffer.appendBufferAsync()

The appendBufferAsync() method of the SourceBuffer interface begins the process of asynchronously appending media segment data from an ArrayBuffer or ArrayBufferView object to the SourceBuffer. It returns a Promise which is fulfilled once the buffer has been appended.

Syntax

appendPromise = sourceBuffer.appendBufferAsync(source);

Parameters

source

A BufferSource (that is, either an ArrayBufferView or ArrayBuffer) which contains the media segment data you want to add to the SourceBuffer.

Return value

A Promise which is fulfilled when the buffer has been added successfully to the SourceBuffer, or null if the request could not be initiated.

Example

This simplified example async function, fillSourceBuffer(), takes as input parameters BufferSource, buffer, and a SourceBuffer to which to append the source media from the buffer.

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

Specifications

Not currently part of any specification. This is being experimented with under the auspices of the Web Platform Incubator Community Group (WICG).

Browser compatibility

See also

• Media Source Extensions API
• SourceBuffer.appendBuffer()
• MediaSource
• SourceBufferList