[html5] r6022 - [e] (0) Add notes about negotiating video resolution in a peer-to-peer scenario.
whatwg at whatwg.org
whatwg at whatwg.org
Thu Apr 21 15:25:47 PDT 2011
Author: ianh
Date: 2011-04-21 15:25:46 -0700 (Thu, 21 Apr 2011)
New Revision: 6022
Modified:
complete.html
index
source
Log:
[e] (0) Add notes about negotiating video resolution in a peer-to-peer scenario.
Modified: complete.html
===================================================================
--- complete.html 2011-04-20 22:45:20 UTC (rev 6021)
+++ complete.html 2011-04-21 22:25:46 UTC (rev 6022)
@@ -239,7 +239,7 @@
<header class=head id=head><p><a class=logo href=http://www.whatwg.org/ rel=home><img alt=WHATWG height=101 src=/images/logo width=101></a></p>
<hgroup><h1>Web Applications 1.0</h1>
- <h2 class="no-num no-toc">Living Standard — Last Updated 20 April 2011</h2>
+ <h2 class="no-num no-toc">Living Standard — Last Updated 21 April 2011</h2>
</hgroup><p>You can take part in this work. <a href=http://www.whatwg.org/mailing-list>Join the working group's discussion list.</a></p>
<p><strong>Web designers!</strong> We have a <a href=http://blog.whatwg.org/faq/>FAQ</a>, a <a href=http://forums.whatwg.org/>forum</a>, and a <a href=http://www.whatwg.org/mailing-list#help>help mailing list</a> for you!</p>
<!--<p class="impl"><strong>Implementors!</strong> We have a <a href="http://www.whatwg.org/mailing-list#implementors">mailing list</a> for you too!</p>-->
@@ -73930,6 +73930,19 @@
the session. The <code><a href=#peerconnection>PeerConnection</a></code> API does not support
bidirectional ("sendrecv") audio or video media streams. <a href=#refsSDPOFFERANSWER>[SDPOFFERANSWER]</a></p>
+ <p>User agents may negotiate any codec and any resolution, bitrate,
+ or other quality metric. User agents are encouraged to initially
+ negotiate for the native resolution of the stream. For streams that
+ are then rendered (using a <code><a href=#video>video</a></code> element), user agents
+ are encouraged to renegotiate for a resolution that matches the
+ rendered display size.</p>
+
+ <p class=note>Starting with the native resolution means that if
+ the Web application notifies its peer of the native resolution as it
+ starts sending data, and the peer prepares its <code><a href=#video>video</a></code>
+ element accordingly, there will be no need for a renegotiation once
+ the stream is flowing.</p>
+
<p>All SDP media descriptions for streams represented by
<code><a href=#stream>Stream</a></code> objects must include a label attribute ("<code title="">a=label:</code>") whose value is the value of the
<code><a href=#stream>Stream</a></code> object's <code title=dom-stream-label><a href=#dom-stream-label>label</a></code> attribute. <a href=#refsSDP>[SDP]</a> <a href=#refsSDPLABEL>[SDPLABEL]</a></p>
Modified: index
===================================================================
--- index 2011-04-20 22:45:20 UTC (rev 6021)
+++ index 2011-04-21 22:25:46 UTC (rev 6022)
@@ -243,7 +243,7 @@
<header class=head id=head><p><a class=logo href=http://www.whatwg.org/ rel=home><img alt=WHATWG height=101 src=/images/logo width=101></a></p>
<hgroup><h1 class=allcaps>HTML</h1>
- <h2 class="no-num no-toc">Living Standard — Last Updated 20 April 2011</h2>
+ <h2 class="no-num no-toc">Living Standard — Last Updated 21 April 2011</h2>
</hgroup><p>You can take part in this work. <a href=http://www.whatwg.org/mailing-list>Join the working group's discussion list.</a></p>
<p><strong>Web designers!</strong> We have a <a href=http://blog.whatwg.org/faq/>FAQ</a>, a <a href=http://forums.whatwg.org/>forum</a>, and a <a href=http://www.whatwg.org/mailing-list#help>help mailing list</a> for you!</p>
<!--<p class="impl"><strong>Implementors!</strong> We have a <a href="http://www.whatwg.org/mailing-list#implementors">mailing list</a> for you too!</p>-->
@@ -73968,6 +73968,19 @@
the session. The <code><a href=#peerconnection>PeerConnection</a></code> API does not support
bidirectional ("sendrecv") audio or video media streams. <a href=#refsSDPOFFERANSWER>[SDPOFFERANSWER]</a></p>
+ <p>User agents may negotiate any codec and any resolution, bitrate,
+ or other quality metric. User agents are encouraged to initially
+ negotiate for the native resolution of the stream. For streams that
+ are then rendered (using a <code><a href=#video>video</a></code> element), user agents
+ are encouraged to renegotiate for a resolution that matches the
+ rendered display size.</p>
+
+ <p class=note>Starting with the native resolution means that if
+ the Web application notifies its peer of the native resolution as it
+ starts sending data, and the peer prepares its <code><a href=#video>video</a></code>
+ element accordingly, there will be no need for a renegotiation once
+ the stream is flowing.</p>
+
<p>All SDP media descriptions for streams represented by
<code><a href=#stream>Stream</a></code> objects must include a label attribute ("<code title="">a=label:</code>") whose value is the value of the
<code><a href=#stream>Stream</a></code> object's <code title=dom-stream-label><a href=#dom-stream-label>label</a></code> attribute. <a href=#refsSDP>[SDP]</a> <a href=#refsSDPLABEL>[SDPLABEL]</a></p>
Modified: source
===================================================================
--- source 2011-04-20 22:45:20 UTC (rev 6021)
+++ source 2011-04-21 22:25:46 UTC (rev 6022)
@@ -84460,6 +84460,19 @@
bidirectional ("sendrecv") audio or video media streams. <a
href="#refsSDPOFFERANSWER">[SDPOFFERANSWER]</a></p>
+ <p>User agents may negotiate any codec and any resolution, bitrate,
+ or other quality metric. User agents are encouraged to initially
+ negotiate for the native resolution of the stream. For streams that
+ are then rendered (using a <code>video</code> element), user agents
+ are encouraged to renegotiate for a resolution that matches the
+ rendered display size.</p>
+
+ <p class="note">Starting with the native resolution means that if
+ the Web application notifies its peer of the native resolution as it
+ starts sending data, and the peer prepares its <code>video</code>
+ element accordingly, there will be no need for a renegotiation once
+ the stream is flowing.</p>
+
<p>All SDP media descriptions for streams represented by
<code>Stream</code> objects must include a label attribute ("<code
title="">a=label:</code>") whose value is the value of the
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