This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The MediaSource
interface of the Media Source Extensions API represents a source of media data for an HTMLMediaElement
object. A MediaSource
object can be attached to a HTMLMediaElement
to be played in the user agent.
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a:hover text { fill: #0095DD; pointer-events: all;}
Constructor
MediaSource()
- Constructs and returns a new
MediaSource
object with no associated source buffers.
Properties
MediaSource.sourceBuffers
Read only- Returns a
SourceBufferList
object containing the list ofSourceBuffer
objects associated with thisMediaSource
. MediaSource.activeSourceBuffers
Read only- Returns a
SourceBufferList
object containing a subset of theSourceBuffer
objects contained withinMediaSource.sourceBuffers
— the list of objects providing the selected video track, enabled audio tracks, and shown/hidden text tracks. MediaSource.readyState
Read only- Returns an enum representing the state of the current
MediaSource
, whether it is not currently attached to a media element (closed
), attached and ready to receiveSourceBuffer
objects (open
), or attached but the stream has been ended viaMediaSource.endOfStream()
(ended
.) MediaSource.duration
- Gets and sets the duration of the current media being presented.
Event handlers
MediaSource.onsourceclose
- The event handler for the
sourceclose
event. MediaSource.onsourceended
- The event handler for the
sourceended
event. MediaSource.onsourceopen
- The event handler for the
sourceopen
event.
Methods
Inherits methods from its parent interface, EventTarget
.
MediaSource.addSourceBuffer()
- Creates a new
SourceBuffer
of the given MIME type and adds it to theMediaSource.sourceBuffers
list. MediaSource.clearLiveSeekableRange()
- Clears a seekable range previously set with a call to
setLiveSeekableRange()
. MediaSource.endOfStream()
- Signals the end of the stream.
MediaSource.removeSourceBuffer()
- Removes the given
SourceBuffer
from theMediaSource.sourceBuffers
list. MediaSource.setLiveSeekableRange()
- Sets the range that the user can seek to in the media element.
Static methods
MediaSource.isTypeSupported()
- Returns a
Boolean
value indicating if the given MIME type is supported by the current user agent — this is, if it can successfully createSourceBuffer
objects for that MIME type.
Examples
The following simple example loads a video with XMLHttpRequest
, playing it as soon as it can. This example was written by Nick Desaulniers and can be viewed live here (you can also download the source for further investigation.)
var video = document.querySelector('video'); 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); }); }; function fetchAB (url, cb) { console.log(url); var xhr = new XMLHttpRequest; xhr.open('get', url); xhr.responseType = 'arraybuffer'; xhr.onload = function () { cb(xhr.response); }; xhr.send(); };
Specifications
Specification | Status | Comment |
---|---|---|
Media Source Extensions The definition of 'MediaSource' in that specification. |
Recommendation | Initial definition. |
Browser compatibility
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
MediaSource | Chrome
Full support
31
| Edge Full support 12 | Firefox
Full support
42
| IE Full support 11 | Opera
Full support
18
| Safari Full support 8 | WebView Android Full support 4.4.3 | Chrome Android
Full support
31
| Firefox Android Full support 41 | Opera Android
Full support
18
| Safari iOS Full support 8 | Samsung Internet Android
Full support
2.0
|
MediaSource() constructor | Chrome
Full support
31
| Edge Full support 12 | Firefox
Full support
42
| IE
Full support
11
| Opera Full support 15 | Safari Full support 8 | WebView Android Full support 4.4.3 | Chrome Android Full support 33 | Firefox Android Full support 41 | Opera Android Full support 14 | Safari iOS No support No | Samsung Internet Android Full support 2.0 |
activeSourceBuffers | Chrome Full support 23 | Edge Full support 12 | Firefox
Full support
42
| IE
Full support
11
| Opera Full support 15 | Safari Full support 8 | WebView Android Full support 4.4.3 | Chrome Android Full support 25 | Firefox Android Full support 41 | Opera Android Full support 14 | Safari iOS No support No | Samsung Internet Android Full support 1.5 |
addSourceBuffer | Chrome Full support 23 | Edge Full support 12 | Firefox
Full support
42
| IE
Full support
11
| Opera Full support 15 | Safari Full support 8 | WebView Android Full support 4.4.3 | Chrome Android Full support 25 | Firefox Android Full support 41 | Opera Android Full support 14 | Safari iOS No support No | Samsung Internet Android Full support 1.5 |
clearLiveSeekableRange | Chrome Full support 62 | Edge Full support 17 | Firefox No support No | IE No support No | Opera Full support 49 | Safari No support No | WebView Android Full support 62 | Chrome Android Full support 62 | Firefox Android ? | Opera Android Full support 46 | Safari iOS No support No | Samsung Internet Android Full support 8.0 |
duration | Chrome Full support 23 | Edge Full support 12 | Firefox
Full support
42
| IE
Full support
11
| Opera Full support 15 | Safari Full support 8 | WebView Android Full support 4.4.3 | Chrome Android Full support 25 | Firefox Android Full support 41 | Opera Android Full support 14 | Safari iOS No support No | Samsung Internet Android Full support 1.5 |
endOfStream | Chrome Full support 23 | Edge Full support 12 | Firefox
Full support
42
| IE
Full support
11
| Opera Full support 15 | Safari Full support 8 | WebView Android Full support 4.4.3 | Chrome Android Full support 25 | Firefox Android Full support 41 | Opera Android Full support 14 | Safari iOS No support No | Samsung Internet Android Full support 1.5 |
isTypeSupported | Chrome Full support 23 | Edge Full support 12 | Firefox
Full support
42
| IE
Full support
11
| Opera Full support 15 | Safari Full support 8 | WebView Android Full support 4.4.3 | Chrome Android Full support 25 | Firefox Android Full support 41 | Opera Android Full support 14 | Safari iOS No support No | Samsung Internet Android Full support 1.5 |
onsourceclose | Chrome Full support 53 | Edge Full support 17 | Firefox
Full support
42
| IE
Full support
11
| Opera Full support 15 | Safari Full support 8 | WebView Android Full support 4.4.3 | Chrome Android Full support 33 | Firefox Android Full support 41 | Opera Android Full support 14 | Safari iOS No support No | Samsung Internet Android Full support 2.0 |
onsourceended | Chrome Full support 53 | Edge Full support 17 | Firefox
Full support
42
| IE
Full support
11
| Opera Full support 15 | Safari Full support 8 | WebView Android Full support 4.4.3 | Chrome Android Full support 33 | Firefox Android Full support 41 | Opera Android Full support 14 | Safari iOS No support No | Samsung Internet Android Full support 2.0 |
onsourceopen | Chrome Full support 53 | Edge Full support 17 | Firefox
Full support
42
| IE
Full support
11
| Opera Full support 15 | Safari Full support 8 | WebView Android Full support 4.4.3 | Chrome Android Full support 33 | Firefox Android Full support 41 | Opera Android Full support 14 | Safari iOS No support No | Samsung Internet Android Full support 2.0 |
readyState | Chrome Full support 23 | Edge Full support 12 | Firefox
Full support
42
| IE
Full support
11
| Opera Full support 15 | Safari Full support 8 | WebView Android Full support 4.4.3 | Chrome Android Full support 33 | Firefox Android Full support 41 | Opera Android Full support 14 | Safari iOS No support No | Samsung Internet Android Full support 2.0 |
removeSourceBuffer | Chrome Full support 23 | Edge Full support 12 | Firefox
Full support
42
| IE
Full support
11
| Opera Full support 15 | Safari Full support 8 | WebView Android Full support 4.4.3 | Chrome Android Full support 25 | Firefox Android Full support 41 | Opera Android Full support 14 | Safari iOS No support No | Samsung Internet Android Full support 1.5 |
setLiveSeekableRange | Chrome Full support 62 | Edge Full support 17 | Firefox No support No | IE No support No | Opera Full support 49 | Safari No support No | WebView Android Full support 62 | Chrome Android Full support 62 | Firefox Android ? | Opera Android Full support 46 | Safari iOS No support No | Samsung Internet Android Full support 8.0 |
sourceBuffers | Chrome Full support 23 | Edge Full support 12 | Firefox
Full support
42
| IE
Full support
11
| Opera Full support 15 | Safari Full support 8 | WebView Android Full support 4.4.3 | Chrome Android Full support 25 | Firefox Android Full support 41 | Opera Android Full support 14 | Safari iOS No support No | Samsung Internet Android Full support 1.5 |
Legend
- Full support
- Full support
- No support
- No support
- Compatibility unknown
- Compatibility unknown
- Experimental. Expect behavior to change in the future.
- Experimental. Expect behavior to change in the future.
- See implementation notes.
- See implementation notes.
- User must explicitly enable this feature.
- User must explicitly enable this feature.
- Requires a vendor prefix or different name for use.
- Requires a vendor prefix or different name for use.