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----
-title: MediaSource
-slug: Web/API/MediaSource
-translation_of: Web/API/MediaSource
----
-<p>{{APIRef("Media Source Extensions")}}{{SeeCompatTable}}</p>
-
-<p>El <strong><code>MediaSource</code></strong> interfaz representa un recurso de media en datos por un {{domxref("HTMLMediaElement")}} objeto. Un <code>MediaSource</code> objeto puede ser atribuido a un {{domxref("HTMLMediaElement")}} para ser reproducido por el usuario.</p>
-
-<h2 id="Constructor">Constructor</h2>
-
-<dl>
- <dt>{{domxref("MediaSource.MediaSource", "MediaSource()")}}</dt>
- <dd>construye y retorna un <code>MediaSource</code> objeto sin asociar un recurso con buffers.</dd>
-</dl>
-
-<h2 id="Propiedades">Propiedades</h2>
-
-<p><em>Inherits properties from its parent interface, {{domxref("EventTarget")}}.</em></p>
-
-<dl>
- <dt>{{domxref("MediaSource.sourceBuffers")}} {{readonlyInline}}</dt>
- <dd>Returns a {{domxref("SourceBufferList")}} object containing the list of {{domxref("SourceBuffer")}} objects associated with this <code>MediaSource</code>.</dd>
- <dt>{{domxref("MediaSource.activeSourceBuffers")}} {{readonlyInline}}</dt>
- <dd>Returns a {{domxref("SourceBufferList")}} object containing a subset of the {{domxref("SourceBuffer")}} objects contained within {{domxref("SourceBuffers")}} — the list of objects providing the selected video track,  enabled audio tracks, and shown/hidden text tracks.</dd>
- <dt>{{domxref("MediaSource.readyState")}} {{readonlyInline}}</dt>
- <dd>Returns an enum representing the state of the current <code>MediaSource</code>, whether it is not currently attached to a media element (<code>closed</code>), attached and ready to receive {{domxref("SourceBuffer")}} objects (<code>open</code>), or attached but the stream has been ended via {{domxref("MediaSource.endOfStream()")}} (<code>ended</code>.)</dd>
- <dt>{{domxref("MediaSource.duration")}}</dt>
- <dd>Gets and sets the duration of the current media being presented.</dd>
-</dl>
-
-<dl>
-</dl>
-
-<dl>
-</dl>
-
-<h2 id="Methods">Methods</h2>
-
-<p><em>Inherits properties from its parent interface, {{domxref("EventTarget")}}.</em></p>
-
-<dl>
- <dt>{{domxref("MediaSource.addSourceBuffer()")}}</dt>
- <dd>Creates a new {{domxref("SourceBuffer")}} of the given MIME type and adds it to the <code>MediaSource</code>'s {{domxref("SourceBuffers")}} list.</dd>
- <dt>{{domxref("MediaSource.removeSourceBuffer()")}}</dt>
- <dd>Removes the given {{domxref("SourceBuffer")}} from the {{domxref("SourceBuffers")}} list associated with this <code>MediaSource</code> object.</dd>
- <dt>{{domxref("MediaSource.endOfStream()")}}</dt>
- <dd>Signals the end of the stream.</dd>
- <dt>
- <h2 id="Static_methods">Static methods</h2>
- </dt>
- <dt>{{domxref("MediaSource.isTypeSupported()")}}</dt>
- <dd>Returns a {{domxref("Boolean")}} value indicating if the given MIME type is supported by the current user agent — this is, if it can successfully create {{domxref("SourceBuffer")}} objects for that MIME type.</dd>
-</dl>
-
-<h2 id="Examples">Examples</h2>
-
-<p>The following simple example loads a video chunk by chunk as fast as possible, playing it as soon as it can. This example was written by Nick Desaulniers and can be <a href="http://nickdesaulniers.github.io/netfix/demo/bufferAll.html">viewed live here</a> (you can also <a href="https://github.com/nickdesaulniers/netfix/blob/gh-pages/demo/bufferAll.html">download the source</a> for further investigation.)</p>
-
-<pre class="brush: js">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 &amp;&amp; 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();
-};</pre>
-
-<h2 id="Specifications">Specifications</h2>
-
-<table class="standard-table">
- <tbody>
- <tr>
- <th scope="col">Specification</th>
- <th scope="col">Status</th>
- <th scope="col">Comment</th>
- </tr>
- <tr>
- <td>{{SpecName('Media Source Extensions', '#mediasource', 'MediaSource')}}</td>
- <td>{{Spec2('Media Source Extensions')}}</td>
- <td>Initial definition.</td>
- </tr>
- </tbody>
-</table>
-
-<h2 id="Browser_compatibility">Browser compatibility</h2>
-
-<div>{{CompatibilityTable}}</div>
-
-<div id="compat-desktop">
-<table class="compat-table">
- <tbody>
- <tr>
- <th>Feature</th>
- <th>Chrome</th>
- <th>Firefox (Gecko)</th>
- <th>Internet Explorer</th>
- <th>Opera</th>
- <th>Safari (WebKit)</th>
- </tr>
- <tr>
- <td>Basic support</td>
- <td>23</td>
- <td>{{CompatGeckoDesktop("25.0")}}<sup>[1]</sup><br>
- {{CompatGeckoDesktop("42.0")}}</td>
- <td>11<sup>[2]</sup></td>
- <td>15</td>
- <td>8</td>
- </tr>
- </tbody>
-</table>
-</div>
-
-<div id="compat-mobile">
-<table class="compat-table">
- <tbody>
- <tr>
- <th>Feature</th>
- <th>Android</th>
- <th>Firefox Mobile (Gecko)</th>
- <th>Firefox OS (Gecko)</th>
- <th>IE Phone</th>
- <th>Opera Mobile</th>
- <th>Safari Mobile</th>
- </tr>
- <tr>
- <td>Basic support</td>
- <td>4.4.4</td>
- <td>
- <p>{{CompatNo}}</p>
- </td>
- <td>{{CompatNo}}</td>
- <td>11</td>
- <td>30</td>
- <td>{{CompatNo}}</td>
- </tr>
- </tbody>
-</table>
-</div>
-
-<p>[1] Available after switching the <code>about:config</code> preference <code>media.mediasource.enabled</code> to <code>true</code>. In addition, support was limited to a whitelist of sites, for example YouTube, Netflix, and other popular streaming sites. The whitelist was removed and Media Source Extensions was enabled by default in 42+ for all sites.</p>
-
-<p>[2] Only works on Windows 8+.</p>
-
-<h2 id="See_also">See also</h2>
-
-<ul>
- <li>{{domxref("SourceBuffer")}}</li>
- <li>{{domxref("SourceBufferList")}}</li>
-</ul>