[html5] r7048 - [e] (0) Yet more polishing of the media timeline phraseology. Affected topics: V [...]
whatwg at whatwg.org
whatwg at whatwg.org
Wed Apr 4 11:56:03 PDT 2012
Author: ianh
Date: 2012-04-04 11:56:01 -0700 (Wed, 04 Apr 2012)
New Revision: 7048
Modified:
complete.html
index
source
Log:
[e] (0) Yet more polishing of the media timeline phraseology.
Affected topics: Video and Audio
Modified: complete.html
===================================================================
--- complete.html 2012-04-03 17:07:40 UTC (rev 7047)
+++ complete.html 2012-04-04 18:56:01 UTC (rev 7048)
@@ -240,7 +240,7 @@
<header class=head id=head><p><a class=logo href=http://www.whatwg.org/><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 3 April 2012</h2>
+ <h2 class="no-num no-toc">Living Standard — Last Updated 4 April 2012</h2>
</hgroup><dl><dt><strong>Web developer edition:</strong></dt>
<dd><strong><a href=http://developers.whatwg.org/>http://developers.whatwg.org/</a></strong></dd>
<dt>Multiple-page version:</dt>
@@ -29382,14 +29382,15 @@
<p><dfn id=defineTimeline title="establish the media
timeline">Establishing the media timeline</dfn>: If the <a href=#media-resource>media
resource</a> somehow specifies an explicit timeline whose origin
- is not negative, then the <a href=#media-timeline>media timeline</a> should be that
- timeline. (Whether the <a href=#media-resource>media resource</a> can specify a
- timeline or not depends on the <a href=#media-resource title="media resource">media
- resource's</a> format.) If the <a href=#media-resource>media resource</a>
- specifies an explicit start time <em>and date</em>, then that time
- and date should be considered the zero point in the <a href=#media-timeline>media
- timeline</a>; the <a href=#timeline-offset>timeline offset</a> will be the time
- and date, exposed using the <code title=dom-media-startDate><a href=#dom-media-startdate>startDate</a></code> attribute.</p>
+ is not negative (i.e. gives each frame a specific time offset and
+ gives the first frame a zero or positive offset), then the
+ <a href=#media-timeline>media timeline</a> should be that timeline. (Whether the
+ <a href=#media-resource>media resource</a> can specify a timeline or not depends on
+ the <a href=#media-resource title="media resource">media resource's</a> format.) If
+ the <a href=#media-resource>media resource</a> specifies an explicit start time
+ <em>and date</em>, then that time and date should be considered the
+ zero point in the <a href=#media-timeline>media timeline</a>; the <a href=#timeline-offset>timeline
+ offset</a> will be the time and date, exposed using the <code title=dom-media-startDate><a href=#dom-media-startdate>startDate</a></code> attribute.</p>
<p>If the <a href=#media-resource>media resource</a> has a discontinuous timeline,
the user agent must extend the timeline used at the start of the
@@ -29410,26 +29411,28 @@
have an explicit timeline, the zero time on the <a href=#media-timeline>media
timeline</a> should correspond to the first frame of the
<a href=#media-resource>media resource</a>. In the even rarer case of a <a href=#media-resource>media
- resource</a> with no explicit timings ofd any kind, the user
- agent must determine the time for each frame.</p>
+ resource</a> with no explicit timings of any kind, not even frame
+ durations, the user agent must itself determine the time for each
+ frame in a user-agent-defined manner.</p>
<p class=note>An example of a file format with no explicit
- timeline but with explicit timings is the Animated GIF format. An
- example of a file format with no explicit timings at all is the
- JPEG-push format (<code title="">multipart/x-mixed-replace</code>
- with JPEG frames, often used as the format for MJPEG streams).</p>
+ timeline but with explicit frame durations is the Animated GIF
+ format. An example of a file format with no explicit timings at all
+ is the JPEG-push format (<code title="">multipart/x-mixed-replace</code> with JPEG frames, often
+ used as the format for MJPEG streams).</p>
- <p>If, even in the absence of timing information, the user agent
- will be able to seek to an earlier point than the first frame
- originally provided by the server, then the zero time should
- correspond to the earliest seekable time of the <a href=#media-resource>media
- resource</a>; otherwise, it should correspond to the first frame
- received from the server (the point in the <a href=#media-resource>media
+ <p>If, in the case of a resource with no timing information, the
+ user agent will nonetheless be able to seek to an earlier point than
+ the first frame originally provided by the server, then the zero
+ time should correspond to the earliest seekable time of the
+ <a href=#media-resource>media resource</a>; otherwise, it should correspond to the
+ first frame received from the server (the point in the <a href=#media-resource>media
resource</a> at which the user agent began receiving the
stream).</p>
- <p class=note>At the time of writing, no format without an
- explicit <a href=#media-timeline>media timeline</a> supported seeking.</p>
+ <p class=note>At the time of writing, there is no known format
+ that lacks explicit frame time offsets yet still supports seeking to
+ a frame before the first frame sent by the server.</p>
<div class=example>
Modified: index
===================================================================
--- index 2012-04-03 17:07:40 UTC (rev 7047)
+++ index 2012-04-04 18:56:01 UTC (rev 7048)
@@ -240,7 +240,7 @@
<header class=head id=head><p><a class=logo href=http://www.whatwg.org/><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 3 April 2012</h2>
+ <h2 class="no-num no-toc">Living Standard — Last Updated 4 April 2012</h2>
</hgroup><dl><dt><strong>Web developer edition:</strong></dt>
<dd><strong><a href=http://developers.whatwg.org/>http://developers.whatwg.org/</a></strong></dd>
<dt>Multiple-page version:</dt>
@@ -29382,14 +29382,15 @@
<p><dfn id=defineTimeline title="establish the media
timeline">Establishing the media timeline</dfn>: If the <a href=#media-resource>media
resource</a> somehow specifies an explicit timeline whose origin
- is not negative, then the <a href=#media-timeline>media timeline</a> should be that
- timeline. (Whether the <a href=#media-resource>media resource</a> can specify a
- timeline or not depends on the <a href=#media-resource title="media resource">media
- resource's</a> format.) If the <a href=#media-resource>media resource</a>
- specifies an explicit start time <em>and date</em>, then that time
- and date should be considered the zero point in the <a href=#media-timeline>media
- timeline</a>; the <a href=#timeline-offset>timeline offset</a> will be the time
- and date, exposed using the <code title=dom-media-startDate><a href=#dom-media-startdate>startDate</a></code> attribute.</p>
+ is not negative (i.e. gives each frame a specific time offset and
+ gives the first frame a zero or positive offset), then the
+ <a href=#media-timeline>media timeline</a> should be that timeline. (Whether the
+ <a href=#media-resource>media resource</a> can specify a timeline or not depends on
+ the <a href=#media-resource title="media resource">media resource's</a> format.) If
+ the <a href=#media-resource>media resource</a> specifies an explicit start time
+ <em>and date</em>, then that time and date should be considered the
+ zero point in the <a href=#media-timeline>media timeline</a>; the <a href=#timeline-offset>timeline
+ offset</a> will be the time and date, exposed using the <code title=dom-media-startDate><a href=#dom-media-startdate>startDate</a></code> attribute.</p>
<p>If the <a href=#media-resource>media resource</a> has a discontinuous timeline,
the user agent must extend the timeline used at the start of the
@@ -29410,26 +29411,28 @@
have an explicit timeline, the zero time on the <a href=#media-timeline>media
timeline</a> should correspond to the first frame of the
<a href=#media-resource>media resource</a>. In the even rarer case of a <a href=#media-resource>media
- resource</a> with no explicit timings ofd any kind, the user
- agent must determine the time for each frame.</p>
+ resource</a> with no explicit timings of any kind, not even frame
+ durations, the user agent must itself determine the time for each
+ frame in a user-agent-defined manner.</p>
<p class=note>An example of a file format with no explicit
- timeline but with explicit timings is the Animated GIF format. An
- example of a file format with no explicit timings at all is the
- JPEG-push format (<code title="">multipart/x-mixed-replace</code>
- with JPEG frames, often used as the format for MJPEG streams).</p>
+ timeline but with explicit frame durations is the Animated GIF
+ format. An example of a file format with no explicit timings at all
+ is the JPEG-push format (<code title="">multipart/x-mixed-replace</code> with JPEG frames, often
+ used as the format for MJPEG streams).</p>
- <p>If, even in the absence of timing information, the user agent
- will be able to seek to an earlier point than the first frame
- originally provided by the server, then the zero time should
- correspond to the earliest seekable time of the <a href=#media-resource>media
- resource</a>; otherwise, it should correspond to the first frame
- received from the server (the point in the <a href=#media-resource>media
+ <p>If, in the case of a resource with no timing information, the
+ user agent will nonetheless be able to seek to an earlier point than
+ the first frame originally provided by the server, then the zero
+ time should correspond to the earliest seekable time of the
+ <a href=#media-resource>media resource</a>; otherwise, it should correspond to the
+ first frame received from the server (the point in the <a href=#media-resource>media
resource</a> at which the user agent began receiving the
stream).</p>
- <p class=note>At the time of writing, no format without an
- explicit <a href=#media-timeline>media timeline</a> supported seeking.</p>
+ <p class=note>At the time of writing, there is no known format
+ that lacks explicit frame time offsets yet still supports seeking to
+ a frame before the first frame sent by the server.</p>
<div class=example>
Modified: source
===================================================================
--- source 2012-04-03 17:07:40 UTC (rev 7047)
+++ source 2012-04-04 18:56:01 UTC (rev 7048)
@@ -31906,14 +31906,15 @@
<p><dfn id="defineTimeline" title="establish the media
timeline">Establishing the media timeline</dfn>: If the <span>media
resource</span> somehow specifies an explicit timeline whose origin
- is not negative, then the <span>media timeline</span> should be that
- timeline. (Whether the <span>media resource</span> can specify a
- timeline or not depends on the <span title="media resource">media
- resource's</span> format.) If the <span>media resource</span>
- specifies an explicit start time <em>and date</em>, then that time
- and date should be considered the zero point in the <span>media
- timeline</span>; the <span>timeline offset</span> will be the time
- and date, exposed using the <code
+ is not negative (i.e. gives each frame a specific time offset and
+ gives the first frame a zero or positive offset), then the
+ <span>media timeline</span> should be that timeline. (Whether the
+ <span>media resource</span> can specify a timeline or not depends on
+ the <span title="media resource">media resource's</span> format.) If
+ the <span>media resource</span> specifies an explicit start time
+ <em>and date</em>, then that time and date should be considered the
+ zero point in the <span>media timeline</span>; the <span>timeline
+ offset</span> will be the time and date, exposed using the <code
title="dom-media-startDate">startDate</code> attribute.</p>
<p>If the <span>media resource</span> has a discontinuous timeline,
@@ -31935,26 +31936,29 @@
have an explicit timeline, the zero time on the <span>media
timeline</span> should correspond to the first frame of the
<span>media resource</span>. In the even rarer case of a <span>media
- resource</span> with no explicit timings ofd any kind, the user
- agent must determine the time for each frame.</p>
+ resource</span> with no explicit timings of any kind, not even frame
+ durations, the user agent must itself determine the time for each
+ frame in a user-agent-defined manner.</p>
<p class="note">An example of a file format with no explicit
- timeline but with explicit timings is the Animated GIF format. An
- example of a file format with no explicit timings at all is the
- JPEG-push format (<code title="">multipart/x-mixed-replace</code>
- with JPEG frames, often used as the format for MJPEG streams).</p>
+ timeline but with explicit frame durations is the Animated GIF
+ format. An example of a file format with no explicit timings at all
+ is the JPEG-push format (<code
+ title="">multipart/x-mixed-replace</code> with JPEG frames, often
+ used as the format for MJPEG streams).</p>
- <p>If, even in the absence of timing information, the user agent
- will be able to seek to an earlier point than the first frame
- originally provided by the server, then the zero time should
- correspond to the earliest seekable time of the <span>media
- resource</span>; otherwise, it should correspond to the first frame
- received from the server (the point in the <span>media
+ <p>If, in the case of a resource with no timing information, the
+ user agent will nonetheless be able to seek to an earlier point than
+ the first frame originally provided by the server, then the zero
+ time should correspond to the earliest seekable time of the
+ <span>media resource</span>; otherwise, it should correspond to the
+ first frame received from the server (the point in the <span>media
resource</span> at which the user agent began receiving the
stream).</p>
- <p class="note">At the time of writing, no format without an
- explicit <span>media timeline</span> supported seeking.</p>
+ <p class="note">At the time of writing, there is no known format
+ that lacks explicit frame time offsets yet still supports seeking to
+ a frame before the first frame sent by the server.</p>
<div class="example">
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