Videos/A Digital Media Primer For Geeks - Revision history

Gmaxwell: ep02 link

2013-02-26T11:09:21Z

ep02 link

← Older revision		Revision as of 11:09, 26 February 2013
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	The program offers a brief history of digital media, a quick summary of the sampling theorem, and myriad details of low level audio and video characterization and formatting. It's intended for budding geeks looking to get into video coding, as well as the technically curious who want to know more about the media they wrangle for work or play.		The program offers a brief history of digital media, a quick summary of the sampling theorem, and myriad details of low level audio and video characterization and formatting. It's intended for budding geeks looking to get into video coding, as well as the technically curious who want to know more about the media they wrangle for work or play.
-	<br/><br/><br/>	+	<br/>
		+	<br/>
		+	See also: [[Videos/Digital_Show_and_Tell\|Episode 02: Digital Show and Tell]]
		+	<br/><br/>
	<center><font size="+2">[http://www.xiph.org/video/vid1.shtml Download or Watch online]</font></center>		<center><font size="+2">[http://www.xiph.org/video/vid1.shtml Download or Watch online]</font></center>
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Gmaxwell: /* Credits */ make link direct

2013-02-26T00:18:16Z

Credits: make link direct

← Older revision		Revision as of 00:18, 26 February 2013
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	<br style="clear:both;"/><hr/>		<br style="clear:both;"/><hr/>
-	<center><font size="+1">''[[~~A Digital Media Primer For Geeks (episode 1)~~/making\|Learn more about the making of this video…]]''</font></center>	+	<center><font size="+1">''[[/making\|Learn more about the making of this video…]]''</font></center>

Gmaxwell: dev versions no longer needed.

2013-02-26T00:07:59Z

dev versions no longer needed.

← Older revision		Revision as of 00:07, 26 February 2013
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	<center><font size="+2">[http://www.xiph.org/video/vid1.shtml Download or Watch online]</font></center>		<center><font size="+2">[http://www.xiph.org/video/vid1.shtml Download or Watch online]</font></center>
	<br style="clear:both;"/>		<br style="clear:both;"/>
-	Players supporting WEBM: [http://www.videolan.org/vlc/ VLC 1.1+], [https://www.mozilla.com/en-US/firefox/~~all-beta.html~~ Firefox ~~4 (beta)~~], [http://www.chromium.org/~~getting-involved/dev-channel~~ Chrome ~~(development versions)~~], [http://www.opera.com/ Opera], [http://www.webmproject.org/users/ more…]	+	Players supporting WEBM: [http://www.videolan.org/vlc/ VLC 1.1+], [https://www.mozilla.com/en-US/firefox/ Firefox ], [http://www.chromium.org/Home Chrome ], [http://www.opera.com/ Opera], [http://www.webmproject.org/users/ more…]

	Players supporting Ogg/Theora: [http://www.videolan.org/vlc/ VLC], [http://www.firefox.com/ Firefox], [http://www.opera.com/ Opera], [[TheoraSoftwarePlayers\|more…]]		Players supporting Ogg/Theora: [http://www.videolan.org/vlc/ VLC], [http://www.firefox.com/ Firefox], [http://www.opera.com/ Opera], [[TheoraSoftwarePlayers\|more…]]

Gmaxwell: moved A Digital Media Primer For Geeks/Episode 01 to Videos/A Digital Media Primer For Geeks

2013-02-25T23:59:44Z

moved A Digital Media Primer For Geeks/Episode 01 to Videos/A Digital Media Primer For Geeks

← Older revision

Revision as of 23:59, 25 February 2013

Lee Carré: moved A Digital Media Primer For Geeks (episode 1) to A Digital Media Primer For Geeks/Episode 01: Establishing a hierarchical structure, especially in anticipation of future episodes. This allows for meta pages, such as giving a summary of e...

2011-09-16T21:57:21Z

moved A Digital Media Primer For Geeks (episode 1) to A Digital Media Primer For Geeks/Episode 01: Establishing a hierarchical structure, especially in anticipation of future episodes. This allows for meta pages, such as giving a summary of e...

← Older revision

Revision as of 21:57, 16 September 2011

Edrz: /* Analog vs Digital */

2010-09-30T20:18:18Z

Analog vs Digital

← Older revision		Revision as of 20:18, 30 September 2010
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	important. It's [[WikiPedia:Continuous_function\|continuous]] in both value and time; that is, at any		important. It's [[WikiPedia:Continuous_function\|continuous]] in both value and time; that is, at any
	given time it can have any real value, and there's a smoothly varying		given time it can have any real value, and there's a smoothly varying
-	value at every point in in time. No matter how much we zoom in, there	+	value at every point in time. No matter how much we zoom in, there
	are no discontinuities, no singularities, no instantaneous steps or		are no discontinuities, no singularities, no instantaneous steps or
	points where the signal ceases to exist. It's defined		points where the signal ceases to exist. It's defined

Edrz: /* Introduction */

2010-09-30T20:11:42Z

Introduction

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	Quite a few people watching are going to be way past anything that I'm		Quite a few people watching are going to be way past anything that I'm
	talking about, at least for now. On the other hand, I'm probably		talking about, at least for now. On the other hand, I'm probably
-	going to go too fast for folks who really ~~are~~ are brand new to all of	+	going to go too fast for folks who really are brand new to all of
	this, so if this is all new, relax. The important thing is to pick out		this, so if this is all new, relax. The important thing is to pick out
	any ideas that really grab your imagination. Especially pay attention		any ideas that really grab your imagination. Especially pay attention

Bemasc: /* Containers */ Add "Going Deeper" for Containers

2010-09-23T03:12:49Z

Containers: Add "Going Deeper" for Containers

← Older revision		Revision as of 03:12, 23 September 2010
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	manipulate, and present the media. In general, any container can hold		manipulate, and present the media. In general, any container can hold
	any kind of data. And data can be put into any container.		any kind of data. And data can be put into any container.
		+
		+
		+	<center><div style="background-color:#DDDDFF;border-color:#CCCCDD;border-style:solid;width:80%;padding:0 1em 1em 1em;text-align:left;">
		+	'''Going deeper…'''
		+	* There are several common general-purpose container formats: [[wikipedia:Audio_Video_Interleave\|AVI]], [[wikipedia:Matroska\|Matroska]], [[wikipedia:Ogg\|Ogg]], [[wikipedia:QuickTime_File_Format\|QuickTime]], and [[wikipedia:Comparison_of_container_formats\|many others]]. These can contain and interleave many different types of media streams.
		+	* Some special-purpose containers have been designed that can only hold one format:
		+	** [http://wiki.multimedia.cx/index.php?title=YUV4MPEG2 The y4m format] is the most common single-purpose container for raw YUV video. It can also be stored in a general-purpose container, for example in Ogg using [[OggYUV]].
		+	** MP3 files use a [[wikipedia:MP3#File_structure\|special single-purpose file format]].
		+	** [[wikipedia:WAV\|WAV]] and [[wikipedia:AIFC\|AIFC]] are semi-single-purpose formats. They're audio-only, and typically contain raw PCM audio, but are occasionally used to store other kinds of audio data ... even MP3!
		+	</div></center>
		+
	<br style="clear:both;"/>		<br style="clear:both;"/>

Bemasc: /* done! */ Remove talk about containers from the raw-video's Going Deeper

2010-09-23T02:51:01Z

done!: Remove talk about containers from the raw-video's Going Deeper

← Older revision		Revision as of 02:51, 23 September 2010
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	<center><div style="background-color:#DDDDFF;border-color:#CCCCDD;border-style:solid;width:80%;padding:0 1em 1em 1em;text-align:left;">		<center><div style="background-color:#DDDDFF;border-color:#CCCCDD;border-style:solid;width:80%;padding:0 1em 1em 1em;text-align:left;">
	'''Going deeper…'''		'''Going deeper…'''
-	* [http://wiki.multimedia.cx/index.php?title=~~YUV4MPEG2 The y4m format~~] ~~is the most common simple container for raw YUV video. People occasionally use [[OggYUV]] to store it in Ogg instead~~.	+	* YCbCr is defined in terms of RGB by the ITU in two incompatible standards: [[wikipedia:Rec. 601\|Rec. 601]] and [[wikipedia:Rec. 709\|Rec. 709]]. Both conversion standards are lossy, which has prompted some to adopt a lossless alternative called [http://wiki.multimedia.cx/index.php?title=YCoCg YCoCg].
	* Learn about [[wikipedia:High_dynamic_range_imaging\|high dynamic range imaging]], which achieves better representation of the full range of brightnesses in the real world by using more than 8 bits per channel.		* Learn about [[wikipedia:High_dynamic_range_imaging\|high dynamic range imaging]], which achieves better representation of the full range of brightnesses in the real world by using more than 8 bits per channel.
	* Learn about how [[wikipedia:Trichromatic_vision\|trichromatic color vision]] works in humans, and how human color perception is encoded in the [[wikipedia:CIE 1931 color space\|CIE 1931 XYZ color space]].		* Learn about how [[wikipedia:Trichromatic_vision\|trichromatic color vision]] works in humans, and how human color perception is encoded in the [[wikipedia:CIE 1931 color space\|CIE 1931 XYZ color space]].
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	** If we were all [[wikipedia:Dichromacy\|dichromats]] then video would only need two color channels. Some humans might be [[wikipedia:Tetrachromacy#Possibility_of_human_tetrachromats\|tetrachromats]], in which case they would need an additional color channel for video to fully represent their vision.		** If we were all [[wikipedia:Dichromacy\|dichromats]] then video would only need two color channels. Some humans might be [[wikipedia:Tetrachromacy#Possibility_of_human_tetrachromats\|tetrachromats]], in which case they would need an additional color channel for video to fully represent their vision.
	** [http://www.xritephoto.com/ph_toolframe.aspx?action=coloriq Test your color vision] (or at least your monitor).		** [http://www.xritephoto.com/ph_toolframe.aspx?action=coloriq Test your color vision] (or at least your monitor).
-	* YCbCr is defined in terms of RGB by the ITU in two incompatible standards: [[wikipedia:Rec. 601\|Rec. 601]] and [[wikipedia:Rec. 709\|Rec. 709]]. Both conversion standards are lossy, which has prompted some to adopt a lossless alternative called [http://wiki.multimedia.cx/index.php?title=YCoCg YCoCg].
	</div></center>		</div></center>

Gmaxwell: /* Introduction */ irc channel

2010-09-22T15:33:22Z

Introduction: irc channel

← Older revision		Revision as of 15:33, 22 September 2010
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	*[http://www.0xdeadbeef.com/weblog/2010/01/html5-video-and-h-264-what-history-tells-us-and-why-were-standing-with-the-web/ HTML5 Video and H.264: what history tells us and why we're standing with the web]: Chris Blizzard of Mozilla on free formats and the open web		*[http://www.0xdeadbeef.com/weblog/2010/01/html5-video-and-h-264-what-history-tells-us-and-why-were-standing-with-the-web/ HTML5 Video and H.264: what history tells us and why we're standing with the web]: Chris Blizzard of Mozilla on free formats and the open web
	*[http://diveintohtml5.org/video.html Dive into HTML5]: tutorial on HTML5 web video		*[http://diveintohtml5.org/video.html Dive into HTML5]: tutorial on HTML5 web video
-	*[http://webchat.freenode.net/?channels=~~vp8~~ Chat with the creators of the video] via freenode IRC in #~~vp8~~.	+	*[http://webchat.freenode.net/?channels=xiph Chat with the creators of the video] via freenode IRC in #xiph.
	</div></center>		</div></center>