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---
title: MediaRecorder.requestData()
slug: Web/API/MediaRecorder/requestData
translation_of: Web/API/MediaRecorder/requestData
---
<p>{{APIRef("MediaStream Recording")}}</p>
<p><span class="seoSummary">Метод <strong><code>MediaRecorder.requestData()</code></strong> (часть <a href="/en-US/docs/Web/API/MediaRecorder_API">MediaRecorder API</a>) используется, чтобы поднять {{domxref("dataavailable")}} событие содержащее {{domxref("Blob")}} объект захваченных медиа-данных как это было когда метод был вызван.</span> This can then be grabbed и манипулировать как необходимо.</p>
<p>When the <code>requestData()</code> method is invoked, the browser queues a task that runs the following steps:</p>
<ol>
<li>If {{domxref("MediaRecorder.state")}} is not "recording", raise a DOM <code>InvalidState</code> error and terminate these steps. If {{domxref("MediaRecorder.state")}} is "recording", continue to the next step.</li>
<li>Raise a {{domxref("dataavailable")}} event containing a {{domxref("Blob")}} of the currently captured data (the Blob is available under the event's <code>data</code> attribute.)</li>
<li>Create a new Blob and place subsequently captured data into it.</li>
</ol>
<h2 id="Syntax">Syntax</h2>
<pre class="syntaxbox">MediaRecorder.requestData()</pre>
<h3 id="Errors">Errors</h3>
<p>An <code>InvalidState</code> error is raised if the <code>requestData()</code> method is called while the <code>MediaRecorder</code> object’s {{domxref("MediaRecorder.state")}} is not "recording" — the media cannot be captured if recording is not occurring.</p>
<h2 id="Example">Example</h2>
<pre class="brush: js">...
captureMedia.onclick = function() {
mediaRecorder.requestData();
// makes snapshot available of data so far
// ondataavailable fires, then capturing continues
// in new Blob
}
...</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("MediaStream Recording", "#widl-MediaRecorder-requestData-void", "MediaRecorder.requestData()")}}</td>
<td>{{Spec2("MediaStream Recording")}}</td>
<td>Initial definition</td>
</tr>
</tbody>
</table>
<h2 id="Browser_compatibility">Browser compatibility</h2>
<p>{{CompatibilityTable}}</p>
<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>{{CompatChrome(47)}}<sup>[2]</sup></td>
<td>{{CompatGeckoDesktop("25.0")}}</td>
<td>{{CompatNo}}</td>
<td>{{CompatNo}}</td>
<td>{{CompatNo}}</td>
</tr>
</tbody>
</table>
</div>
<div id="compat-mobile">
<table class="compat-table">
<tbody>
<tr>
<th>Feature</th>
<th>Android</th>
<th>Android Webview</th>
<th>Firefox Mobile (Gecko)</th>
<th>Firefox OS</th>
<th>IE Phone</th>
<th>Opera Mobile</th>
<th>Safari Mobile</th>
<th>Chrome for Android</th>
</tr>
<tr>
<td>Basic support</td>
<td>{{CompatNo}}</td>
<td>{{CompatNo}}</td>
<td>{{CompatGeckoDesktop("25.0")}}</td>
<td>1.3<sup>[1]</sup></td>
<td>{{CompatNo}}</td>
<td>{{CompatNo}}</td>
<td>{{CompatNo}}</td>
<td>{{CompatNo}}</td>
</tr>
</tbody>
</table>
</div>
<p>[1] The intial Firefox OS implementation only supported audio recording.</p>
<p>[2] To try this feature on Chrome, enable <em>Experimental Web Platform features</em> from <a>chrome://flags</a> . Currently only video is supported, not audio.</p>
<h2 id="See_also">See also</h2>
<ul>
<li><a href="/en-US/docs/Web/API/MediaRecorder_API/Using_the_MediaRecorder_API">Using the MediaRecorder API</a></li>
<li><a href="http://mdn.github.io/web-dictaphone/">Web Dictaphone</a>: MediaRecorder + getUserMedia + Web Audio API visualization demo, by <a href="https://twitter.com/chrisdavidmills">Chris Mills</a> (<a href="https://github.com/mdn/web-dictaphone/">source on Github</a>.)</li>
<li><a href="http://simpl.info/mediarecorder/">simpl.info MediaStream Recording demo</a>, by <a href="https://twitter.com/sw12">Sam Dutton</a>.</li>
<li>{{domxref("Navigator.getUserMedia")}}</li>
</ul>
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