MediaSource.endOfStream() - Web APIs 编辑

Experimental

This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The endOfStream() method of the MediaSource interface signals the end of the stream.

Syntax

mediaSource.endOfStream(endOfStreamError);

Parameters

endOfStreamError Optional

A DOMString representing an error to throw when the end of the stream is reached. The possible values are:

• network: Terminates playback and signals that a network error has occurred. This can be used create a custom error handler related to media streams. For example, you might have a function that handles media chunk requests, separate from other network requests. When you make an XMLHttpRequest call for a media chunk, and onabort or onerror triggers, you might want to call endOfStream('network'), display a descriptive message in the UI, and maybe retry the network request immediately or wait until the network is back up (via some kind of polling.)
• decode: Terminates playback and signals that a decoding error has occurred. This can be used to indicate that a parsing error has occurred while fetching media data; maybe the data is corrupt, or is encoded using a codec that the browser doesn't know how to decode.

Return value

undefined

Exceptions

Example

The following snippet is from a simple example written by Nick Desaulniers (view the full demo live, or download the source for further investigation.)

var assetURL = 'frag_bunny.mp4';
// Need to be specific for Blink regarding codecs
// ./mp4info frag_bunny.mp4 | grep Codec
var mimeCodec = 'video/mp4; codecs="avc1.42E01E, mp4a.40.2"';

if ('MediaSource' in window && MediaSource.isTypeSupported(mimeCodec)) {
  var mediaSource = new MediaSource;
  //console.log(mediaSource.readyState); // closed
  video.src = URL.createObjectURL(mediaSource);
  mediaSource.addEventListener('sourceopen', sourceOpen);
} else {
  console.error('Unsupported MIME type or codec: ', mimeCodec);
}

function sourceOpen (_) {
  //console.log(this.readyState); // open
  var mediaSource = this;
  var sourceBuffer = mediaSource.addSourceBuffer(mimeCodec);
  fetchAB(assetURL, function (buf) {
    sourceBuffer.addEventListener('updateend', function (_) {
      mediaSource.endOfStream();
      video.play();
      //console.log(mediaSource.readyState); // ended
    });
    sourceBuffer.appendBuffer(buf);
  });
};

Specifications

Browser compatibility

BCD tables only load in the browser

See also

• SourceBuffer
• SourceBufferList