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addSourceBuffer method

Creates a new SourceBuffer and adds it to the SourceBuffers property of the MediaSource.

Important  This method is not supported in Internet Explorer 11 on Windows 7.
IE11

 

Syntax

var sourcebuffer = MediaSource.addSourceBuffer(type);

Parameters

type [in]

Type: DOMString

The MIME type. This is expressed typically as 'video/mp4' or as a MIME type and a codec: 'video/mp4;codecs=avc1.4d0020,mp4a.40.2'. a Windows Store app using JavaScript accepts both formats, though other browsers may require the codec be included.

Return value

Type: SourceBuffer

The media source buffer.

Exceptions

ExceptionCondition
INVALID_ACCESS_ERR

If type is null or an empty string.

NOT_SUPPORTED_ERR

If type contains a MIME type that's not supported or a MIME type that's not supported by SourceBuffer.

QUOTA_EXCEEDED_ERR

If the mediaSource can't handle any more SourceBuffer objects.

 

Examples

This example gets a video object, creates a new MediaSource object, and assigns the MediaSource object to the src (source) of the video object. It then waits for the sourceopen event to fire, and then creates a video SourceBuffer using addSourceBuffer.


// Create mediaSource and initialize video 
function setupVideo() {
  clearLog(); // Clear console log

  //  Create the media source 
  if (window.MediaSource) {
    mediaSource = new window.MediaSource();
   } else {
    log("mediasource or syntax not supported");
    return;
  }
  var url = URL.createObjectURL(mediaSource);
  videoElement.pause();
  videoElement.src = url;
  videoElement.width = width;
  videoElement.height = height;

  // Wait for event that tells us that our media source object is 
  //   ready for a buffer to be added.
  mediaSource.addEventListener('sourceopen', function (e) {
    try {
      videoSource = mediaSource.addSourceBuffer('video/mp4');
      initVideo(initialization, file);           
    } catch (e) {
      log('Exception calling addSourceBuffer for video', e);
      return;
    }
  },false);



See also

MediaSource
Building a simple MPEG-DASH streaming player

 

 

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