W3C home > Mailing lists > Public > public-dap-commits@w3.org > November 2012

dap commit: adding first draft of the recording proposal

From: Mercurial notifier <cvsmail@w3.org>
Date: Thu, 29 Nov 2012 20:52:36 +0000
Message-Id: <E1TeB64-0006Ew-QW@mcbain.w3.org>
To: public-dap-commits@w3.org
changeset:   295:49a82aed2326
tag:         tip
user:        Jim Barnett <Jim.Barnett@genesyslab.com>
date:        Thu Nov 29 15:53:11 2012 -0500
files:       media-stream-capture/RecordingProposal.html
description:
adding first draft of the recording proposal


diff -r b52b0f4dd2c2 -r 49a82aed2326 media-stream-capture/RecordingProposal.html
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/media-stream-capture/RecordingProposal.html	Thu Nov 29 15:53:11 2012 -0500
@@ -0,0 +1,723 @@
+<!DOCTYPE html>
+<html lang="en-US-x-Hixie"><head><title>Recording Proposal &#8212; HTML5</title><link rel="stylesheet" href="alert.css"><style type="text/css">
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+  <link href="the-track-element.html" title="4.8.9 The track element" rel="prev">
+  <link href="index.html#contents" title="Table of contents" rel="contents">
+  <link href="the-canvas-element.html" title="4.8.11 The canvas element" rel="next">
+  </head><body onload="fixBrokenLink();" class="split chapter"><div class="head" id="head">
+   <p><a href="http://www.w3.org/"><img alt="W3C" height="48" src="http://www.w3.org/Icons/w3c_home" width="72"></a></p>
+
+   <h1>Media Recording API</h1>
+   <h2>November 28, 2012</h2>
+ 
+   <dt>This version:</dt>
+      <dd><a href="@@@">@@@</a></dd>
+      <dt>Latest published version:</dt>
+      <dd><a href="@@@">@@@</a></dd> 
+   <dt>Editors:</dt>
+    <dd><span>Jim Barnett</span>, Genesys</dd>
+<dd><span>Travis Leithead</span>, Microsoft</dd> 
+  </dl>
+  
+  <section id="sotd" class="introductory"><h2>Status of This Document</h2>
+  
+    
+      
+        <p>
+          <em>This section describes the status of this document at the time of its publication. Other
+          documents may supersede this document. A list of current <acronym title="World Wide Web Consortium">W3C</acronym> publications and the latest revision
+          of this technical report can be found in the <a href="http://www.w3.org/TR/"><acronym title="World Wide Web Consortium">W3C</acronym> technical reports
+          index</a> at http://www.w3.org/TR/.</em>
+        </p>
+        
+    <p>This document is not complete. It is subject to major changes and, while
+    early experimentations are encouraged, it is therefore not intended for
+    implementation. 
+    The Media Capture Task Force expects this specification to evolve
+    significantly based on:</p>
+
+    <ul>
+      <li>Privacy issues that arise when capturing media.</li>
+
+      <li>Technical discussions within the task force.</li>
+
+      <li>Experience gained through early experimentations.</li>
+
+      <li>Feedback received from other groups and individuals.</li>
+    </ul>
+  
+        <p>
+          This document was published by the <a href="http://www.w3.org/2011/04/webrtc/">Web Real-Time Communication Working Group</a> as an Editor's Draft.
+          
+          If you wish to make comments regarding this document, please send them to 
+          <a href="mailto:public-media-capture@w3.org">public-media-capture@w3.org</a> 
+          (<a href="mailto:public-media-capture-request@w3.org?subject=subscribe">subscribe</a>,
+          <a href="http://lists.w3.org/Archives/Public/public-media-capture/">archives</a>).
+          
+          
+          All feedback is welcome.
+        </p>
+        
+          <p>
+            Publication as an Editor's Draft does not imply endorsement by the <acronym title="World Wide Web Consortium">W3C</acronym> Membership.
+            This is a draft document and may be updated, replaced or obsoleted by other documents at 
+            any time. It is inappropriate to cite this document as other than work in progress.
+          </p>
+        
+        
+        <p>
+          
+            This document was produced by a group operating under the 
+            <a href="http://www.w3.org/Consortium/Patent-Policy-20040205/">5 February 2004 <acronym title="World Wide Web Consortium">W3C</acronym> Patent Policy</a>.
+          
+          
+          
+            
+              <acronym title="World Wide Web Consortium">W3C</acronym> maintains a public list of any patent disclosures (<a href="http://www.w3.org/2004/01/pp-impl/47318/status" rel="disclosure">Web Real-Time Communication Working Group</a>, <a href="http://www.w3.org/2004/01/pp-impl/43696/status" rel="disclosure">Device APIs Working Group</a>)
+            
+            made in connection with the deliverables of the group; that page also includes instructions for 
+            disclosing a patent. An individual who has actual knowledge of a patent which the individual believes contains
+            <a href="http://www.w3.org/Consortium/Patent-Policy-20040205/#def-essential">Essential Claim(s)</a> must disclose the
+            information in accordance with <a href="http://www.w3.org/Consortium/Patent-Policy-20040205/#sec-Disclosure">section
+            6 of the <acronym title="World Wide Web Consortium">W3C</acronym> Patent Policy</a>.
+          
+          
+        </p>
+        
+      
+    
+  
+</section>
+  
+
+<section id="overview"><h2><span class="secno">1.0 </span>Overview</h2>
+  <p>This proposal attempts to make basic recording very simple, while still allowing for more complex use cases.  In the simplest case,
+  	the application instatiates the MediaRecorder object, calls record() and then calls stopRecord() or waits for the MediaStream to be ended.  The contents of the recording
+  	will be made available in the platform's default encoding via the dataavailable event.  Functions are available to query
+  	the platform's available set of encodings, and to select the desired ones if the author wishes.  The application can also choose 
+  	how much data it wants to receive at one time.  By default a Blob containing the entire recording is returned when
+  	the recording finishes.  However the application can choose to receive smaller buffers of data at regular intervals.  </p>
+ </section>
+ 
+ <section id="MediaRecorderAPI"><h2><span class="secno">2.0 </span>Media Recorder API</h2>
+
+       <pre class="idl"><span class="idlInterface" id="idl-def-MediaRecorder">
+[<span class="extAttr">Constructor (MediaStream stream)</span>]
+interface <span class="idlInterfaceID">MediaRecorder</span> : <span class="idlSuperclass"><a>EventTarget </a></span> {
+
+<span class="idlAttribute">    readonly attribute <span class="idlAttrType"><a class="idlType" href="widl-mediaStream"><code>MediaStream</code></a></span> <span class="idlAttrName"><a href="#widl-mediaStream">mediaStream</a></span>;</span>
+<span class="idlAttribute">    readonly attribute <span class="idlAttrType"><a class="idlType" href="widl-recording"><code>Boolean</code></a></span> <span class="idlAttrName"><a href="#widl-recording">recording</a></span>;</span>
+<span class="idlAttribute">             attribute <span class="idlAttrType"><a class="idlType" href=""><code>EventHandler</code></a></span> <span class="idlAttrName"><a href="#widl-onrecording">onrecording</a></span>;</span>
+<span class="idlAttribute">             attribute <span class="idlAttrType"><a class="idlType" href=""><code>EventHandler</code></a></span> <span class="idlAttrName"><a href="#widl-onstoprecording">onstoprecording</a></span>;</span>
+<span class="idlAttribute">             attribute <span class="idlAttrType"><a class="idlType" href=""><code>EventHandler</code></a></span> <span class="idlAttrName"><a href="#widl-ondataavailable">ondataavailable</a></span>;</span>
+<span class="idlAttribute">             attribute <span class="idlAttrType"><a class="idlType" href=""><code>EventHandler</code></a></span> <span class="idlAttrName"><a href="#widl-onrecordingerror">onrecordingerror</a></span>;</span>
+<span class="idlAttribute">             attribute <span class="idlAttrType"><a class="idlType" href=""><code>EventHandler</code></a></span> <span class="idlAttrName"><a href="#widl-onrecordingwarning">onrecordingwarning</a></span>;</span>
+<span class="idlMethod">    <span class="idlMethType"><a>void</a></span>                          <span class="idlMethName"><a href="#widl-record">record</a></span> (<span class="idlParam">optional <span class="idlParamType">long</span> <span class="idlParamName">timeSlice</span></span>);</span>
+<span class="idlMethod">    <span class="idlMethType"><a>void</a></span>                          <span class="idlMethName"><a href="#widl-stoprecording">stopRecording</a></span> ();</span>
+<span class="idlMethod">    <span class="idlMethType"><a>void</a></span>                          <span class="idlMethName"><a href="#widl-requestData">requestData</a></span>();</span>
+<span class="idlMethod">    <span class="idlMethType"><a href="#widl-dictionary-availablerecordingformats">AvailableRecordingFormats</a></span>     <span class="idlMethName"><a href="#widl-getrecordingoptions">getRecordingOptions</a></span> ();</span>
+<span class="idlMethod">    <span class="idlMethType"><a>void</a></span>                          <span class="idlMethName"><a href="#widl-setrecordingoptions">setRecordingOptions</a></span> (<span class="idlParam"><span class="idlParamType"><a class=idlType href="#widl-dictionaryrecordingformat">RecordingFormat</a></span> <span class="idlParamName">RequestedFormats</span>);</span>
+};</span></pre>
+
+<p>The <dfn id="dom-mediarecorder"> <code>MediaRecorder()</code></dfn>
+      constructor takes one argument which
+      <em title="must" class="rfc2119">must</em> be of type <code>MediaStream</code></code> (see <a href="#bib-mediacapture" class="bibref">Media-Capture)</a>. When the constructor
+      is invoked, the UA <em title="must" class="rfc2119">must</em> construct a new <a class="idlType" href="#idl-def-MediaRecorder"><code>MediaRecorder</code></a></code> object,
+      	 set its <a href="#widl-mediastream">mediaStream</a> attribute to be the provided MediaStream, set its <a href="#widl-recording">recording</a> attribute to 'false'
+      	 and return the object.</p>
+
+<section id="attributes-1"><h3><span class="secno">2.1 </span>Attributes</h3>
+		<dl class="attributes"><dt id="widl-mediaStream"><code>mediaStream</code> of type <span class="idlAttrType"><a class="idlType" href=""><code>MediaStream</code></a></span>, readonly</dt><dd>
+          <p>The MediaStream passed in to the constructor. </p>
+        </dd></dl>
+	<dl class="attributes"><dt id="widl-recording"><code>recording</code> of type <span class="idlAttrType"><a class="idlType" href=""><code>Boolean</code></a></span>, readonly</dt><dd>
+          <p>True if 'record()' has been called and not stopped.  Otherwise False. </p>
+        </dd></dl>
+  <dl class="attributes"><dt id="widl-onrecording"><code>onrecording</code> of type <span class="idlAttrType"><a class="idlType" href=""><code>EventHandler</code></a></span></dt><dd>
+          <p>Called to handle the recording event.</p>
+        </dd></dl>
+  <dl class="attributes"><dt id="widl-onstoprecording"><code>onstoprecording</code> of type <span class="idlAttrType"><a class="idlType" href=""><code>EventHandler</code></a></span></dt><dd>
+          <p>Called to handle the stoprecording event.</p>
+        </dd></dl>
+ <dl class="attributes"><dt id="widl-ondataavailable"><code>ondataavailable</code> of type <span class="idlAttrType"><a class="idlType" href=""><code>EventHandler</code></a></span></dt><dd>
+          <p>Called to handle the dataavailable event.  Note that the Blob (see <cite><a href="#bib-FILE-API" class="bibref">FILEAPI</a></cite>) of recorded data is contained in this event and can
+          	be accessed via the 'detail' attribute.</p>
+        </dd></dl> 
+<dl class="attributes"><dt id="widl-onrecordingerror"><code>onrecordingerror</code> of type <span class="idlAttrType"><a class="idlType" href=""><code>EventHandler</code></a></span></dt><dd>
+          <p>Called to handle the recordingerror event. </p>
+        </dd></dl> 
+<dl class="attributes"><dt id="widl-onrecordingwarning"><code>onrecordingwarning</code> of type <span class="idlAttrType"><a class="idlType" href=""><code>EventHandler</code></a></span></dt><dd>
+          <p>Called to handle the recordingwarning event. </p>
+        </dd></dl> 
+              
+        </section>
+        
+<section id="methods-1"><h3><span class="secno">2.2 </span>Methods</h3>
+	<dl class="methods"><dt id="widl-record"><code>record</code></dt><dd>
+		<p><p>When a <code><a class="idlType" href="#idl-def-MediaRecorder"><code>MediaRecorder</code></a></code> objectís <code>record()</code> method is invoked,
+          the user agent <em title="must" class="rfc2119">must</em> queue a task that runs the following steps:</p>
+		<ol>
+			<li>If <a href="#widl-recording">recording</a> is 'true', raise a <code>recordingwarning</code>
+				event and abort these steps.</li>
+				<li>Otherwise set <a href="#widl-recording">recording</a> to 'true' and wait until media
+					becomes available from <a href="#widl-mediaStream">mediaStream</a>.</li>
+			<li>Once data becomes available raise a <code>recording</code>event and start gathering the 
+				data into a Blob (see <cite><a href="#bib-FILE-API" class="bibref">FILEAPI</a></cite>). </li>
+		<li>If the <code>timeSlice</code> argument has been provided, then once <code>timeSlice</code>
+			milliseconds of data have been colleced, raise a <code>dataavailable</code> event containing
+			the Blob of collected data, and start gathering a new Blob of data.  Otherwise (if <code>timeSlice</code>
+			has not been provided), continue gathering data into the original Blob.</li>
+			<li>When the <a href="#idl-mediaStream">mediaStream</a> is ended set <a href="widl-recoding">recording</a>
+					to 'false' and stop gathering data.
+					<li>Then  raise a <code>dataavailable</code> event containing the Blob of data.</li>
+					<li>Finally, raise a <code>stoprecording</code> event.</li> 
+			</ol>
+			<p>Note that the <a href="#widl-stoprecording"><code>stopRecording()</code></a> and
+				<a href="#widl-requestData"><code>requestData()</code></a> also affect the recording behavior.</p>
+					<br>
+			<p>The UA <em title="must" class="rfc2119">must</em> record the MediaStream
+			in such a way that the original Tracks can be retrieved at playback time.  If any Track within the
+			MediaStream is muted, the UA
+			<em title="must" class="rfc2119">must</em> insert black frames or silence until the Track is unmuted. If the UA is 
+			unable to start recording or at any point is unable to contine recording, it <em title="must" class="rfc2119">must</em> raise 
+			a <code>recordingerror</code> event, follwowed by a <code>dataavailable</code> event containing
+			the Blob it has gathered, follwed by the <code>stoprecording</code> event.    
+		</p>
+				  
+	</dd></dl>
+<dl class="methods"><dt id="widl-stoprecording"><code>stopRecording</code></dt><dd>
+	<p><p>When a <code><a class="idlType" href="#idl-def-MediaRecorder"><code>MediaRecorder</code></a></code> objectís <code>stopRecording</code> method is invoked,
+          the user agent <em title="must" class="rfc2119">must</em> queue a task that runs the following steps:</p>
+		<ol>
+			<li>If <a href="#widl-recording">recording</a> is 'false', raise a <code>recordingwarning</code>
+				event and abort these steps.</li>
+			<li>Set <a href="#widl-recording">recording</a> to 'false' and stop gathering data. </li>
+			<li>Raise a <code>dataavailable</code> event containing the Blob of data that has been gathered.</li>
+			<li>Raise a <code>recordingdone</code> event</li>
+				
+			</ol>
+		</dd></dl>
+	
+<dl class="methods"><dt id="widl-requestData"><code>requestData</code></dt><dd>
+	<p>When a <code><a class="idlType" href="#idl-def-MediaRecorder"><code>MediaRecorder</code></a></code> objectís <code>requestData()</code></dfn> method is invoked,
+          the user agent <em title="must" class="rfc2119">must</em> queue a task that runs the following steps:</p>
+		<ol>
+			<li>If <a href="#widl-recording">recording</a> is 'false', raise a <code>recordingwarning</code>
+				event and abort these steps.</li>
+		<li>Raise a <code>dataavailable</code> event containing the current Blob of saved data.</li>
+		<li>Creat a new Blob and gather subsequent data into it.</li>
+	</ol>
+		</dd></dl>
+		
+<dl class="methods"><dt id="widl-getrecordingoptions"><code>getRecordingOptions</code></dt><dd>
+		<p><p>When a <code><a class="idlType" href="#idl-def-MediaRecorder"><code>MediaRecorder</code></a></code> objectís <code>getRecordingOptions()</code></dfn> method is invoked,
+          the user agent <em title="must" class="rfc2119">must </em>return a 
+          	<a href="#widl-dictionary-availablerecordingformats"</a>availableRecordingFormats</a> structure
+          containing the set of recording formats that it supports.</p>
+		</dd></dl>
+	
+<dl class="methods"><dt id="widl-setrecordingoptions"><code>setRecordingOptions</code></dt><dd>
+		<p>When a <code><a class="idlType" href="#idl-def-MediaRecorder"><code>MediaRecorder</code></a></code> objectís <code>setRecordingOptions()</code> method is invoked,
+          the user agent <em title="must" class="rfc2119">must</em> run the following steps:</p>
+		<ol>
+			<li>If <a href="#widl-recording">recording</a> is 'true', raise a <code>recordingwarning</code>
+				event and abort these steps.</li>
+				<li>Otherwise let <em>encodings</em> be the current set of encodings that are specified
+					to be used for recording by the MediaRecorder.  (If setRecordingOptions() has not yet been called, these will
+					be the UA's defaults.)</li>
+			<li>For each encoding format that is specified in the <code>requestedFormats</code> argument,
+				if the UA does not support it, raise a <code>recordingwarning</code> event, set <em>encodings</em>
+				back to its value in step 2, and terminate these steps.  Otherwise
+				replace the corresponding member of <em>encodings</em> with the specified value.</li>
+			</ol>
+		</dd></dl>
+
+</section>
+
+
+<section id="widl-dictionary-availablerecordingformats"><h2><span class="secno">3.0 </span>Dictionary <code>AvailableRecordingFormats</code></h2>
+      <pre class="idl"><span class="idlDictionary" id="">dictionary <span class="idlDictionaryID">AvailableRecordingFormats</span> {
+<span class="idlMember">    <span class="idlMemberType"><a>sequence&lt;DOMString&gt;</a></span> <span class="idlMemberName"><a href="">containerEncodingFormats</a></span>;</span>
+<span class="idlMember">    <span class="idlMemberType"><a>sequence&lt;DOMString&gt</a></span> <span class="idlMemberName"><a href="">audioEncodingFormats</a></span>;</span>
+<span class="idlMember">    <span class="idlMemberType"><a>sequence&lt;DOMString&gt</a></span> <span class="idlMemberName"><a href="">videoEncodingFormats</a></span>;</span>
+};</span></pre>
+<dl class="attributes"><dt id="widl-containerencodingformats"><code>containerEncodingFormats</code> of type <span class="idlAttrType"><a class="idlType" href=""><code>sequence&lt;DOMtring&gt;</code></a></span></dt><dd>
+          <p>A list of the container encoding formats that the platform supports.  </p>
+        </dd></dl> 
+<dl class="attributes"><dt id="widl-audioencodingformats"><code>audioEncodingFormats</code> of type <span class="idlAttrType"><a class="idlType" href=""><code>sequence&lt;DOMtring&gt;</code></a></span></dt><dd>
+          <p>A list of the audio encoding formats that the platform supports.   </p>
+        </dd></dl>  
+<dl class="attributes"><dt id="widl-videoencodingformats"><code>videoEncodingFormats</code> of type <span class="idlAttrType"><a class="idlType" href=""><code>sequence&lt;DOMtring&gt;</code></a></span></dt><dd>
+          <p>A list of the video encoding formats that the platform supports.  </p>
+        </dd></dl> 
+        
+        <p>The UA <em title="must" class="rfc2119">must</em> be able to play back any encoding format that
+        	it can record into.  The UA <em title="must" class="rfc2119">must</em> support a container format
+        	capable of holding at least two video Tracks and two audio Tracks.  </p>
+</section>
+
+<section id="widl-dictionary-recordingformat"><h3><span class="secno">3.1 </span>Dictionary <a href="#idl-def-DataChannelInit" class="idlType"><code>RecordingFormat</code></a></h3>
+      <pre class="idl"><span class="idlDictionary" id="">dictionary <span class="idlDictionaryID">RecordingFormat</span> {
+<span class="idlMember">    <span class="idlMemberType">&lt;DOMString&gt;</span> <span class="idlMemberName"><a href="">containerEncodingFormat</a></span>;</span>
+<span class="idlMember">    <span class="idlMemberType">&lt;DOMString&gt</span> <span class="idlMemberName"><a href="">audioEncodingFormat</a></span>;</span>
+<span class="idlMember">    <span class="idlMemberType">&lt;DOMString&gt</span> <span class="idlMemberName"><a href="">videoEncodingFormat</a></span>;</span>
+};</span></pre>
+<dl class="attributes"><dt id="widl-containerencodingformat"><code>containerEncodingFormat</code> of type <span class="idlAttrType"><a class="idlType" href=""><code>&lt;DOMtring&gt;</code></a></span></dt><dd>
+          <p>The container encoding format to use for recording.  If it is not specified, the platform default will be used. </p>
+        </dd></dl> 
+<dl class="attributes"><dt id="widl-audioencodingformat"><code>audioEncodingFormat</code> of type <span class="idlAttrType"><a class="idlType" href=""><code>&lt;DOMtring&gt;</code></a></span></dt><dd>
+          <p>The audio encoding format to use for recording.  If it is not specified, the platform default will be used.  </p>
+        </dd></dl>  
+<dl class="attributes"><dt id="widl-videoencodingformat"><code>videoEncodingFormat</code> of type <span class="idlAttrType"><a class="idlType" href=""><code>&lt;DOMtring&gt;</code></a></span></dt><dd>
+          <p>The video encoding format to use for recording.  If it is not specified, the platform default will be used.  </p>
+        </dd></dl> 
+
+</section>
+
+<section id="ErrorHandling" class="normmative">
+   <h2><span class="secno">4.0 </span>Error Handling</h2>
+   <p>If a fatal error occurs while recording is occuring, the UA <em title="must" class="rfc2119">must</em>
+   	raise a recordingerror, followed by a dataavailable event, containing any data that it has gathered,
+   	and then a recordingdone event. The UA  <em title="may" class="rfc2119">may</em> set platform-specific
+   	limits, such those for the minimum and maximum Blob size that it will support, or the number of 
+   	Tracks it will record at once.  It <em title="must" class="rfc2119">must</em> signal a fatal
+   	error if these limits are exceeded.  If a non-fatal error occurs during recording, the UA 
+   	<em title="should" class="rfc2119">should</em> raise a recordingwarning event, with data indicating
+   	the nature of the problem, and continue recording. </p>
+
+ <section id="event-summary" class="informative">
+   <h2><span class="secno">5.0 </span>Event summary</h2>
+
+
+    <p>The following additional events fire on <code><a class="idlType" href="#idl-def-MediaRecorder"><code>MediaRecorder</code></a></code>
+    objects:</p>
+
+    <table style="border-width:0; width:60%" border="1">
+      <tbody><tr>
+        <th>Event name</th>
+
+        <th>Interface</th>
+
+        <th>Fired when...</th>
+      </tr>
+
+      </tbody><tbody>
+        <tr>
+          <td><dfn id="event-mediarecorder-recording"><code>recording</code></dfn></td>
+
+          <td><code>Event</code></td>
+
+          <td>The UA has started recording data on the Track.</td>
+        </tr>
+
+        <tr>
+          <td><dfn id="event-mediarecorder-stoprecording"><code>stoprecording</code></dfn></td>
+
+          <td><code>Event</code></td>
+
+          <td>The UA has stopped recording data on the Track.</td>
+        </tr>
+  
+
+        <tr>
+          <td><dfn id="event-mediarecorder-dataavailable"><code>dataavailable</code></dfn></td>
+
+          <td><code>CustomEvent</code></a></code></td>
+
+          <td>The UA returns data to the application.  This 'detail' attribute of this 
+          	event contains a Blob of recorded data.</td>
+        </tr>
+
+        <tr>
+          <td><dfn id="event-mediarecorder-recordingerror"><code>recordingerror</code></dfn></td>
+
+          <td><code>CustomEvent</code></td>
+
+          <td>A fatal error has occurred and the UA has stopped recording. More  detailed error information
+          	is available in the 'detail' attribute. </td>
+        </tr>
+        
+          <tr>
+          <td><dfn id="event-mediarecorder-recordingwarning"><code>recordingwarning</code></dfn></td>
+
+          <td><code>CustomEvent</code></td>
+
+          <td>A problem has occurred, but the UA has not stopped recording. More detailed information
+          	is available in the 'detail' attribute. </td>
+        </tr>
+
+      </tbody>
+    </table>
+
+  </section>
+  	
+ <section class="appendix" id="openissues"><!--OddPage--><h2><span class="secno">A. </span>Open Issues</h2>
+ 	<ol>
+ 		<li>Do we need an MTI
+        	format?</li>
+        	<li>Do we need a "setSyncPoint()" operator and a "syncpoint" signal, 
+        		so that the client can tell the recorder to insert a point at 
+        		which a recording can be broken up (typically a new I-frame)? </li>
+   <li>Does it make sense to set audiorecordingformat and videorecordingformat separately? 
+   	Would it be simpler to specify a container format with options for codecs?</li>
+ 		</ol>
+</section>
+
+<section class="appendix" id="references"><!--OddPage--><h2><span class="secno">B. </span>References</h2><section id="normative-references"><h3><span class="secno">B.1 </span>Normative references</h3>
+	<dl class="bibliography"><dt id="bib-FILE-API">[FILE-API]</dt><dd>Arun Ranganathan; Jonas Sicking. <a href="http://www.w3.org/TR/2011/WD-FileAPI/"><cite>File API.</cite></a> 25 October 2012. W3C Working Draft. (Work in progress.) URL: <a href="http://www.w3.org/TR/2011/WD-FileAPI/">http://www.w3.org/TR/2011/WD-FileAPI/</a> </dl>
+	<dl class="bibliography"><dt id="bib-mediacapture">[Media-Capture]</dt><dd>Daniel C. Burnett; Arant Narayan. <a href="http://dev.w3.org/2011/webrtc/editor/getusermedia.html"><cite>Media Capture and Streams.</cite></a> 15 November 2012. W3C Editors' Draft. (Work in progress.) URL: <a href="http://dev.w3.org/2011/webrtc/editor/getusermedia.html">http://dev.w3.org/2011/webrtc/editor/getusermedia.html</a> </dl>
+</dd>
+  </body></html>
Received on Thursday, 29 November 2012 20:52:39 GMT

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