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	<entry>
		<id>http://wiki.bakabt.me/index.php?title=DXVA&amp;diff=4788</id>
		<title>DXVA</title>
		<link rel="alternate" type="text/html" href="http://wiki.bakabt.me/index.php?title=DXVA&amp;diff=4788"/>
		<updated>2010-07-19T19:43:48Z</updated>

		<summary type="html">&lt;p&gt;JackMasamune: /* Graphics cards */  typo correction&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;This article is meant to give you a brief explanation of what DXVA is and why it is benificial if you can use it.&lt;br /&gt;
&lt;br /&gt;
==Overview==&lt;br /&gt;
&lt;br /&gt;
DXVA, or DirectX Video Accelleration, is a system built into Windows operating systems since Windows XP that allows programs, if they support it, to offload the decoding of certain media codecs to the GPU. Doing so reduces the strain on the CPU and allows for even High Definition content to be played on a relatively weak system.&lt;br /&gt;
&lt;br /&gt;
==Why offload?==&lt;br /&gt;
&lt;br /&gt;
Media is almost always encoded in one format or another using one codec or another in order to save space. In order to display it to you the program playing it must first decode the file and reassemble the image. The decoding process requires quite intensive calculations and while for small resolutions at low quality a modern CPU can handle it, high resoltion and high quality encodes, such as 1080P with H.264, can require such enormous amount of calculation that even modern CPUs can&#039;t handle it, resulting in image stuttering, artifacts and dropped frames.&lt;br /&gt;
&lt;br /&gt;
Fortunately modern computers usually come equipped with a GPU: Graphics Processing Unit. While normally used for rendering graphics, in essence a GPU is a processor just like your CPU is, only it supports a different and much more limited amount of capabilities. One of the main capabilities however is to do specific calculations greatly parallellised. To compare: a normal CPU nowadays has 2-4 cores that can calculate in parallel, a GPU has hundreds of them. As luck has it, the decoding of media codecs such as H.264 can be parallelised into the calculating abilities of a GPU, allowing the GPU to calculate it. What is a monstrous task for even the best CPU becomes a cakewalk for even the weakest GPU.&lt;br /&gt;
&lt;br /&gt;
This way people that do not have a strong CPU can still view 1080P content.&lt;br /&gt;
&lt;br /&gt;
==DXVA Versions==&lt;br /&gt;
&lt;br /&gt;
DXVA has 2 versions:&lt;br /&gt;
&lt;br /&gt;
*DXVA 1.0: supported in Windows XP and Windows 2000. Allows basic offloading of MPEG2 and standard definition codecs.&lt;br /&gt;
&lt;br /&gt;
*DXVA 2.0: supported in Windows Vista and Windows 7. Allows offloading of much more HD content such as VP-1 and H.264.&lt;br /&gt;
&lt;br /&gt;
==What do I need to use DXVA?==&lt;br /&gt;
&lt;br /&gt;
2 Things: a GPU that allows the calculations to be offloaded to it, and a program that is able to use DXVA.&lt;br /&gt;
&lt;br /&gt;
===Graphics cards===&lt;br /&gt;
Both ATI and nVidia have graphics cards that support offloading, however not all GPUs support the same offload capabilities.&lt;br /&gt;
&lt;br /&gt;
*ATI: called UVD or [https://secure.wikimedia.org/wikipedia/en/wiki/Unified_Video_Decoder Unified Video Decoder]. Supports offloading of H.264/AVC and VC-1. Supported in Radeon HD 2xxx and up. Comes in 3 versions, each with more capabilities. Check the wiki page for details.&lt;br /&gt;
&lt;br /&gt;
*nVidia: called [https://secure.wikimedia.org/wikipedia/en/wiki/Nvidia_PureVideo PureVideo]. Supports offloading of H.264/AVC and VC-1. Supported from GeForce 6600 onwards. Comes in 4 versions, each with more capabilities. Check the wiki page for details.&lt;br /&gt;
&lt;br /&gt;
===Programs===&lt;br /&gt;
The full list can be found on the Wikipedia page about DXVA (see references).&lt;br /&gt;
&lt;br /&gt;
===&amp;lt;span style=&amp;quot;color:green&amp;quot;&amp;gt;Recommended&amp;lt;/span&amp;gt;===&lt;br /&gt;
Media Player Classic Home Cinema: Supports full H.264 offloading using internal decoders when configured properly. Refer to [[Windows Video Playback]] and [http://forums.bakabt.com/index.php?topic=13746.0 this] guide for more details.&lt;br /&gt;
&lt;br /&gt;
==References==&lt;br /&gt;
*&#039;&#039;&#039;[https://secure.wikimedia.org/wikipedia/en/wiki/DXVA DXVA]&#039;&#039;&#039; from Wikipedia&lt;br /&gt;
*&#039;&#039;&#039;[https://secure.wikimedia.org/wikipedia/en/wiki/Unified_Video_Decoder UVD]&#039;&#039;&#039; from Wikipedia&lt;br /&gt;
*&#039;&#039;&#039;[https://secure.wikimedia.org/wikipedia/en/wiki/Nvidia_PureVideo PureVideo]&#039;&#039;&#039; from Wikipedia&lt;br /&gt;
*&#039;&#039;&#039;[http://www.guru3d.com/article/accelerate-x264-1080p-movies-over-the-gpu-guide/1 Accelerate x.264 1080p movies over the GPU guide]&#039;&#039;&#039; from Guru3D&lt;/div&gt;</summary>
		<author><name>JackMasamune</name></author>
	</entry>
	<entry>
		<id>http://wiki.bakabt.me/index.php?title=DXVA&amp;diff=4769</id>
		<title>DXVA</title>
		<link rel="alternate" type="text/html" href="http://wiki.bakabt.me/index.php?title=DXVA&amp;diff=4769"/>
		<updated>2010-07-14T15:38:11Z</updated>

		<summary type="html">&lt;p&gt;JackMasamune: /* References */  Added a link to an extra article explaining things&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;This article is meant to give you a brief explanation of what DXVA is and why it is benificial if you can use it.&lt;br /&gt;
&lt;br /&gt;
==Overview==&lt;br /&gt;
&lt;br /&gt;
DXVA, or DirectX Video Accelleration, is a system built into Windows operating systems since Windows XP that allows programs, if they support it, to offload the decoding of certain media codecs to the GPU. Doing so reduces the strain on the CPU and allows for even High Definition content to be played on a relatively weak system.&lt;br /&gt;
&lt;br /&gt;
==Why offload?==&lt;br /&gt;
&lt;br /&gt;
Media is almost always encoded in one format or another using one codec or another in order to save space. In order to display it to you the program playing it must first decode the file and reassemble the image. The decoding process requires quite intensive calculations and while for small resolutions at low quality a modern CPU can handle it, high resoltion and high quality encodes, such as 1080P with H.264, can require such enormous amount of calculation that even modern CPUs can&#039;t handle it, resulting in image stuttering, artifacts and dropped frames.&lt;br /&gt;
&lt;br /&gt;
Fortunately modern computers usually come equipped with a GPU: Graphics Processing Unit. While normally used for rendering graphics, in essence a GPU is a processor just like your CPU is, only it supports a different and much more limited amount of capabilities. One of the main capabilities however is to do specific calculations greatly parallellised. To compare: a normal CPU nowadays has 2-4 cores that can calculate in parallel, a GPU has hundreds of them. As luck has it, the decoding of media codecs such as H.264 can be parallelised into the calculating abilities of a GPU, allowing the GPU to calculate it. What is a monstrous task for even the best CPU becomes a cakewalk for even the weakest GPU.&lt;br /&gt;
&lt;br /&gt;
This way people that do not have a strong CPU can still view 1080P content.&lt;br /&gt;
&lt;br /&gt;
==DXVA Versions==&lt;br /&gt;
&lt;br /&gt;
DXVA has 2 versions:&lt;br /&gt;
&lt;br /&gt;
*DXVA 1.0: supported in Windows XP and Windows 2000. Allows basic offloading of MPEG2 and standard definition codecs.&lt;br /&gt;
&lt;br /&gt;
*DXVA 2.0: supported in Windows Vista and Windows 7. Allows offloading of much more HD content such as VP-1 and H.264.&lt;br /&gt;
&lt;br /&gt;
==What do I need to use DXVA?==&lt;br /&gt;
&lt;br /&gt;
2 Things: a GPU that allows the calculations to be offloaded to it, and a program that is able to use DXVA.&lt;br /&gt;
&lt;br /&gt;
===Graphics cards===&lt;br /&gt;
Both ATI and nVidia have graphics cards that support offloading, however not all GPUs support the same offload capabilities.&lt;br /&gt;
&lt;br /&gt;
*ATI: called UVD or [https://secure.wikimedia.org/wikipedia/en/wiki/Unified_Video_Decoder Unified Video Decoder]. Supports offloading of H.264/AVC and VC-1. Supported in Radeon HD 2xxx and up. Comes in 3 versions, each with more capabilities. Check the wiki page for details.&lt;br /&gt;
&lt;br /&gt;
*nVidia: called [https://secure.wikimedia.org/wikipedia/en/wiki/Nvidia_PureVideo PureVideo]. Supports offloading of H2.64/AVC and VC-1. Supported from GeForce 6600 onwards. Comes in 4 versions, each with more capabilities. Check the wiki page for details.&lt;br /&gt;
&lt;br /&gt;
===Programs===&lt;br /&gt;
The full list can be found on the Wikipedia page about DXVA (see references).&lt;br /&gt;
&lt;br /&gt;
===&amp;lt;span style=&amp;quot;color:green&amp;quot;&amp;gt;Recommended&amp;lt;/span&amp;gt;===&lt;br /&gt;
Media Player Classic Home Cinema: Supports full H.264 offloading using internal decoders when configured properly. Refer to [[Windows Video Playback]] and [http://forums.bakabt.com/index.php?topic=13746.0 this] guide for more details.&lt;br /&gt;
&lt;br /&gt;
==References==&lt;br /&gt;
*&#039;&#039;&#039;[https://secure.wikimedia.org/wikipedia/en/wiki/DXVA DXVA]&#039;&#039;&#039; from Wikipedia&lt;br /&gt;
*&#039;&#039;&#039;[https://secure.wikimedia.org/wikipedia/en/wiki/Unified_Video_Decoder UVD]&#039;&#039;&#039; from Wikipedia&lt;br /&gt;
*&#039;&#039;&#039;[https://secure.wikimedia.org/wikipedia/en/wiki/Nvidia_PureVideo PureVideo]&#039;&#039;&#039; from Wikipedia&lt;br /&gt;
*&#039;&#039;&#039;[http://www.guru3d.com/article/accelerate-x264-1080p-movies-over-the-gpu-guide/1 Accelerate x.264 1080p movies over the GPU guide]&#039;&#039;&#039; from Guru3D&lt;/div&gt;</summary>
		<author><name>JackMasamune</name></author>
	</entry>
	<entry>
		<id>http://wiki.bakabt.me/index.php?title=Codecs&amp;diff=4768</id>
		<title>Codecs</title>
		<link rel="alternate" type="text/html" href="http://wiki.bakabt.me/index.php?title=Codecs&amp;diff=4768"/>
		<updated>2010-07-14T14:15:00Z</updated>

		<summary type="html">&lt;p&gt;JackMasamune: /* Text Codecs */  Added Wikipedia links&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;This article is meant as a brief explanation of the most common codecs used on BakaBT and is purely information.  For codec troubleshooting, see the [[Common_Playback_Problems|Common Playback Problems]] BakaBT Wiki article, or visit the [http://forums.BakaBT.com/index.php?board=27.0 Playback Forum] for help playing/installing codecs.&lt;br /&gt;
&lt;br /&gt;
==Overview==&lt;br /&gt;
A codec is a device or software that is capable of decoding and/or encoding data, wether it be a digital data stream or signal.  Basically, they are what we use to encode and decode virtually all of the content found on BakaBT.  For the most part, we only worry about the decoding.&lt;br /&gt;
&lt;br /&gt;
==Compression==&lt;br /&gt;
Basically, two types of compression exist, &#039;&#039;Lossy&#039;&#039;, and &#039;&#039;Lossles&#039;&#039;.  For example, most of the anime found on BakaBT will use &#039;&#039;Lossy codecs&#039;&#039;, where as several soundtracks use &#039;&#039;Lossless&#039;&#039;.&lt;br /&gt;
&lt;br /&gt;
*&#039;&#039;&#039;Lossy codecs&#039;&#039;&#039; - Many of the more popular codecs in the software world are lossy, meaning that they reduce quality by some amount in order to achieve compression. Smaller data sets ease the strain on relatively expensive storage sub-systems such as non-volatile memory and hard disk, as well as write-once-read-many formats such as CD-ROM, DVD and Blu-ray Disc.&lt;br /&gt;
*&#039;&#039;&#039;Lossless codecs&#039;&#039;&#039; - There are also many lossless codecs which are typically used for archiving data in a compressed form while retaining all of the information present in the original stream. If preserving the original quality of the stream is more important than eliminating the correspondingly larger data sizes, lossless codecs are preferred. Especially if the data is to undergo further processing (for example editing) in which case the repeated application of processing (encoding and decoding) on lossy codecs will degrade the quality of the resulting data such that it is readily identifiable (visually, audibly or both). Using more than one codec or encoding scheme successively can also degrade quality significantly. The decreasing cost of storage capacity and network bandwidth has a tendency to reduce the need for lossy codecs for some media.&lt;br /&gt;
&lt;br /&gt;
==Video Codecs==&lt;br /&gt;
Currently, many formats exist for video codecs, here are the more common ones found on BakaBT:&lt;br /&gt;
&lt;br /&gt;
&amp;lt;!--  Needs some more information  --&amp;gt;&lt;br /&gt;
*&#039;&#039;&#039;[https://secure.wikimedia.org/wikipedia/en/wiki/MPEG-2 MPEG-2]&#039;&#039;&#039; - the codec which is used on DVDs and on some Blu-ray/HD-DVD discs.&lt;br /&gt;
*&#039;&#039;&#039;[https://secure.wikimedia.org/wikipedia/en/wiki/MPEG-4_Part_2 MPEG-4 Part 2]&#039;&#039;&#039; - also known as MPEG-4 SP/MPEG-4 ASP. Popular software implemantations are: DivX, Xvid, 3ivx&lt;br /&gt;
*&#039;&#039;&#039;[https://secure.wikimedia.org/wikipedia/en/wiki/H.264 MPEG-4 Part 10]&#039;&#039;&#039; - also known as MPEG-4 AVC/H.264. Used on Blu-ray/HD-DVD discs.&lt;br /&gt;
*&#039;&#039;&#039;[https://secure.wikimedia.org/wikipedia/en/wiki/WMV WMV]&#039;&#039;&#039; - codec developed by Microsoft.&lt;br /&gt;
*&#039;&#039;&#039;[https://secure.wikimedia.org/wikipedia/en/wiki/VC-1 VC-1]&#039;&#039;&#039; - H.264 rival. Used on Blu-ray/HD-DVD discs. Can be offloaded via [[DXVA]] on recent ATI GPUs and the newest nVidia GPUs.&lt;br /&gt;
*&#039;&#039;&#039;[https://secure.wikimedia.org/wikipedia/en/wiki/X264 x264]&#039;&#039;&#039; - Open Source (free) implementation of H.264 standard. Can be offloaded via [[DXVA]] on nVidia and ATI GPUs.&lt;br /&gt;
&lt;br /&gt;
==Audio Codecs==&lt;br /&gt;
Several audio formats exist as well, these apply to both movies and music/sounds.  Here are some of the common ones used on BakaBT.&lt;br /&gt;
&lt;br /&gt;
&amp;lt;!-- Needs verification  --&amp;gt;&lt;br /&gt;
*&#039;&#039;&#039;[https://secure.wikimedia.org/wikipedia/en/wiki/MP3 MP3]&#039;&#039;&#039;: Lossy codec that is commonly supported by just about every media player out there. Can be easily copied over to the portable media player of your choice. Quality is highly dependent on bitrate.&lt;br /&gt;
&lt;br /&gt;
*&#039;&#039;&#039;[https://secure.wikimedia.org/wikipedia/en/wiki/Flac FLAC]&#039;&#039;&#039;: Lossless codec. Offers potentially higher audio quality than MP3, at the cost of higher file size. Is not commonly supported by standard media players or portable media players. Common media players such as Windows Media Player can be made compatible using a plug-in, while other media players such as Media Player Classic Home Cinema have built-in support.&lt;br /&gt;
&lt;br /&gt;
==Text Codecs==&lt;br /&gt;
Text codecs are used for files that contain softsubs, they are basically text that is rendered during playback separately from the video track instead of being rendered directly to the video file during encoding (hardsubs).  The main advantage of using softsubs being that multiple subtitle/karaoke tracks can be packaged into one file or not used at all during playback.  The main drawback is that it adds more overhead to the file.&lt;br /&gt;
&lt;br /&gt;
The softsub file is sometimes a separate file, .sub for example, but is usually inside the [[Containers|container]] file.  Here are the most common codecs used on BakaBT:&lt;br /&gt;
 &lt;br /&gt;
*&#039;&#039;&#039;[https://secure.wikimedia.org/wikipedia/en/wiki/SubStation_Alpha SubStation Alpha]&#039;&#039;&#039; - Commonly used on BakaBT.  Supports both styled text and metadata.  Has a precision of 10 milliseconds.  Frequently encoded within a [[Containers|container]], thus rarely seen as a separate file.  Uses a .ssa or .ass extension.&lt;br /&gt;
*&#039;&#039;&#039;[https://secure.wikimedia.org/wikipedia/en/wiki/VobSub VobSub]&#039;&#039;&#039; - Common on BakaBT as well.  VobSub is image-based so it doesn&#039;t support styled text or metadata.  This is the codec used when the subtitles are ripped directly from the source DVD.  These have a precision of 1 millisecond.&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
* Hardsubs are rendered directly into the video stream so a separate codec isn&#039;t required&lt;br /&gt;
&lt;br /&gt;
==References==&lt;br /&gt;
*&#039;&#039;&#039;[http://en.wikipedia.org/wiki/Video_codec Video codec]&#039;&#039;&#039; from Wikipedia&lt;br /&gt;
*&#039;&#039;&#039;[http://en.wikipedia.org/wiki/List_of_codecs#Audio_codecs Audio codecs]&#039;&#039;&#039; from Wikipedia&lt;br /&gt;
*&#039;&#039;&#039;[http://en.wikipedia.org/wiki/Subtitle_(captioning)#Types Subtitle (captioning)]&#039;&#039;&#039; from Wikipedia&lt;/div&gt;</summary>
		<author><name>JackMasamune</name></author>
	</entry>
	<entry>
		<id>http://wiki.bakabt.me/index.php?title=Codecs&amp;diff=4767</id>
		<title>Codecs</title>
		<link rel="alternate" type="text/html" href="http://wiki.bakabt.me/index.php?title=Codecs&amp;diff=4767"/>
		<updated>2010-07-14T14:13:29Z</updated>

		<summary type="html">&lt;p&gt;JackMasamune: /* Audio Codecs */  Styling&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;This article is meant as a brief explanation of the most common codecs used on BakaBT and is purely information.  For codec troubleshooting, see the [[Common_Playback_Problems|Common Playback Problems]] BakaBT Wiki article, or visit the [http://forums.BakaBT.com/index.php?board=27.0 Playback Forum] for help playing/installing codecs.&lt;br /&gt;
&lt;br /&gt;
==Overview==&lt;br /&gt;
A codec is a device or software that is capable of decoding and/or encoding data, wether it be a digital data stream or signal.  Basically, they are what we use to encode and decode virtually all of the content found on BakaBT.  For the most part, we only worry about the decoding.&lt;br /&gt;
&lt;br /&gt;
==Compression==&lt;br /&gt;
Basically, two types of compression exist, &#039;&#039;Lossy&#039;&#039;, and &#039;&#039;Lossles&#039;&#039;.  For example, most of the anime found on BakaBT will use &#039;&#039;Lossy codecs&#039;&#039;, where as several soundtracks use &#039;&#039;Lossless&#039;&#039;.&lt;br /&gt;
&lt;br /&gt;
*&#039;&#039;&#039;Lossy codecs&#039;&#039;&#039; - Many of the more popular codecs in the software world are lossy, meaning that they reduce quality by some amount in order to achieve compression. Smaller data sets ease the strain on relatively expensive storage sub-systems such as non-volatile memory and hard disk, as well as write-once-read-many formats such as CD-ROM, DVD and Blu-ray Disc.&lt;br /&gt;
*&#039;&#039;&#039;Lossless codecs&#039;&#039;&#039; - There are also many lossless codecs which are typically used for archiving data in a compressed form while retaining all of the information present in the original stream. If preserving the original quality of the stream is more important than eliminating the correspondingly larger data sizes, lossless codecs are preferred. Especially if the data is to undergo further processing (for example editing) in which case the repeated application of processing (encoding and decoding) on lossy codecs will degrade the quality of the resulting data such that it is readily identifiable (visually, audibly or both). Using more than one codec or encoding scheme successively can also degrade quality significantly. The decreasing cost of storage capacity and network bandwidth has a tendency to reduce the need for lossy codecs for some media.&lt;br /&gt;
&lt;br /&gt;
==Video Codecs==&lt;br /&gt;
Currently, many formats exist for video codecs, here are the more common ones found on BakaBT:&lt;br /&gt;
&lt;br /&gt;
&amp;lt;!--  Needs some more information  --&amp;gt;&lt;br /&gt;
*&#039;&#039;&#039;[https://secure.wikimedia.org/wikipedia/en/wiki/MPEG-2 MPEG-2]&#039;&#039;&#039; - the codec which is used on DVDs and on some Blu-ray/HD-DVD discs.&lt;br /&gt;
*&#039;&#039;&#039;[https://secure.wikimedia.org/wikipedia/en/wiki/MPEG-4_Part_2 MPEG-4 Part 2]&#039;&#039;&#039; - also known as MPEG-4 SP/MPEG-4 ASP. Popular software implemantations are: DivX, Xvid, 3ivx&lt;br /&gt;
*&#039;&#039;&#039;[https://secure.wikimedia.org/wikipedia/en/wiki/H.264 MPEG-4 Part 10]&#039;&#039;&#039; - also known as MPEG-4 AVC/H.264. Used on Blu-ray/HD-DVD discs.&lt;br /&gt;
*&#039;&#039;&#039;[https://secure.wikimedia.org/wikipedia/en/wiki/WMV WMV]&#039;&#039;&#039; - codec developed by Microsoft.&lt;br /&gt;
*&#039;&#039;&#039;[https://secure.wikimedia.org/wikipedia/en/wiki/VC-1 VC-1]&#039;&#039;&#039; - H.264 rival. Used on Blu-ray/HD-DVD discs. Can be offloaded via [[DXVA]] on recent ATI GPUs and the newest nVidia GPUs.&lt;br /&gt;
*&#039;&#039;&#039;[https://secure.wikimedia.org/wikipedia/en/wiki/X264 x264]&#039;&#039;&#039; - Open Source (free) implementation of H.264 standard. Can be offloaded via [[DXVA]] on nVidia and ATI GPUs.&lt;br /&gt;
&lt;br /&gt;
==Audio Codecs==&lt;br /&gt;
Several audio formats exist as well, these apply to both movies and music/sounds.  Here are some of the common ones used on BakaBT.&lt;br /&gt;
&lt;br /&gt;
&amp;lt;!-- Needs verification  --&amp;gt;&lt;br /&gt;
*&#039;&#039;&#039;[https://secure.wikimedia.org/wikipedia/en/wiki/MP3 MP3]&#039;&#039;&#039;: Lossy codec that is commonly supported by just about every media player out there. Can be easily copied over to the portable media player of your choice. Quality is highly dependent on bitrate.&lt;br /&gt;
&lt;br /&gt;
*&#039;&#039;&#039;[https://secure.wikimedia.org/wikipedia/en/wiki/Flac FLAC]&#039;&#039;&#039;: Lossless codec. Offers potentially higher audio quality than MP3, at the cost of higher file size. Is not commonly supported by standard media players or portable media players. Common media players such as Windows Media Player can be made compatible using a plug-in, while other media players such as Media Player Classic Home Cinema have built-in support.&lt;br /&gt;
&lt;br /&gt;
==Text Codecs==&lt;br /&gt;
Text codecs are used for files that contain softsubs, they are basically text that is rendered during playback separately from the video track instead of being rendered directly to the video file during encoding (hardsubs).  The main advantage of using softsubs being that multiple subtitle/karaoke tracks can be packaged into one file or not used at all during playback.  The main drawback is that it adds more overhead to the file.&lt;br /&gt;
&lt;br /&gt;
The softsub file is sometimes a separate file, .sub for example, but is usually inside the [[Containers|container]] file.  Here are the most common codecs used on BakaBT:&lt;br /&gt;
 &lt;br /&gt;
*&#039;&#039;&#039;SubStation Alpha&#039;&#039;&#039; - Commonly used on BakaBT.  Supports both styled text and metadata.  Has a precision of 10 milliseconds.  Frequently encoded within a [[Containers|container]], thus rarely seen as a separate file.  Uses a .ssa or .ass extension.&lt;br /&gt;
*&#039;&#039;&#039;VobSub&#039;&#039;&#039; - Common on BakaBT as well.  VobSub is image-based so it doesn&#039;t support styled text or metadata.  This is the codec used when the subtitles are ripped directly from the source DVD.  These have a precision of 1 millisecond.&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
* Hardsubs are rendered directly into the video stream so a separate codec isn&#039;t required&lt;br /&gt;
&lt;br /&gt;
==References==&lt;br /&gt;
*&#039;&#039;&#039;[http://en.wikipedia.org/wiki/Video_codec Video codec]&#039;&#039;&#039; from Wikipedia&lt;br /&gt;
*&#039;&#039;&#039;[http://en.wikipedia.org/wiki/List_of_codecs#Audio_codecs Audio codecs]&#039;&#039;&#039; from Wikipedia&lt;br /&gt;
*&#039;&#039;&#039;[http://en.wikipedia.org/wiki/Subtitle_(captioning)#Types Subtitle (captioning)]&#039;&#039;&#039; from Wikipedia&lt;/div&gt;</summary>
		<author><name>JackMasamune</name></author>
	</entry>
	<entry>
		<id>http://wiki.bakabt.me/index.php?title=Codecs&amp;diff=4766</id>
		<title>Codecs</title>
		<link rel="alternate" type="text/html" href="http://wiki.bakabt.me/index.php?title=Codecs&amp;diff=4766"/>
		<updated>2010-07-14T14:12:42Z</updated>

		<summary type="html">&lt;p&gt;JackMasamune: /* Audio Codecs */  Added info about MP3 and FLAC&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;This article is meant as a brief explanation of the most common codecs used on BakaBT and is purely information.  For codec troubleshooting, see the [[Common_Playback_Problems|Common Playback Problems]] BakaBT Wiki article, or visit the [http://forums.BakaBT.com/index.php?board=27.0 Playback Forum] for help playing/installing codecs.&lt;br /&gt;
&lt;br /&gt;
==Overview==&lt;br /&gt;
A codec is a device or software that is capable of decoding and/or encoding data, wether it be a digital data stream or signal.  Basically, they are what we use to encode and decode virtually all of the content found on BakaBT.  For the most part, we only worry about the decoding.&lt;br /&gt;
&lt;br /&gt;
==Compression==&lt;br /&gt;
Basically, two types of compression exist, &#039;&#039;Lossy&#039;&#039;, and &#039;&#039;Lossles&#039;&#039;.  For example, most of the anime found on BakaBT will use &#039;&#039;Lossy codecs&#039;&#039;, where as several soundtracks use &#039;&#039;Lossless&#039;&#039;.&lt;br /&gt;
&lt;br /&gt;
*&#039;&#039;&#039;Lossy codecs&#039;&#039;&#039; - Many of the more popular codecs in the software world are lossy, meaning that they reduce quality by some amount in order to achieve compression. Smaller data sets ease the strain on relatively expensive storage sub-systems such as non-volatile memory and hard disk, as well as write-once-read-many formats such as CD-ROM, DVD and Blu-ray Disc.&lt;br /&gt;
*&#039;&#039;&#039;Lossless codecs&#039;&#039;&#039; - There are also many lossless codecs which are typically used for archiving data in a compressed form while retaining all of the information present in the original stream. If preserving the original quality of the stream is more important than eliminating the correspondingly larger data sizes, lossless codecs are preferred. Especially if the data is to undergo further processing (for example editing) in which case the repeated application of processing (encoding and decoding) on lossy codecs will degrade the quality of the resulting data such that it is readily identifiable (visually, audibly or both). Using more than one codec or encoding scheme successively can also degrade quality significantly. The decreasing cost of storage capacity and network bandwidth has a tendency to reduce the need for lossy codecs for some media.&lt;br /&gt;
&lt;br /&gt;
==Video Codecs==&lt;br /&gt;
Currently, many formats exist for video codecs, here are the more common ones found on BakaBT:&lt;br /&gt;
&lt;br /&gt;
&amp;lt;!--  Needs some more information  --&amp;gt;&lt;br /&gt;
*&#039;&#039;&#039;[https://secure.wikimedia.org/wikipedia/en/wiki/MPEG-2 MPEG-2]&#039;&#039;&#039; - the codec which is used on DVDs and on some Blu-ray/HD-DVD discs.&lt;br /&gt;
*&#039;&#039;&#039;[https://secure.wikimedia.org/wikipedia/en/wiki/MPEG-4_Part_2 MPEG-4 Part 2]&#039;&#039;&#039; - also known as MPEG-4 SP/MPEG-4 ASP. Popular software implemantations are: DivX, Xvid, 3ivx&lt;br /&gt;
*&#039;&#039;&#039;[https://secure.wikimedia.org/wikipedia/en/wiki/H.264 MPEG-4 Part 10]&#039;&#039;&#039; - also known as MPEG-4 AVC/H.264. Used on Blu-ray/HD-DVD discs.&lt;br /&gt;
*&#039;&#039;&#039;[https://secure.wikimedia.org/wikipedia/en/wiki/WMV WMV]&#039;&#039;&#039; - codec developed by Microsoft.&lt;br /&gt;
*&#039;&#039;&#039;[https://secure.wikimedia.org/wikipedia/en/wiki/VC-1 VC-1]&#039;&#039;&#039; - H.264 rival. Used on Blu-ray/HD-DVD discs. Can be offloaded via [[DXVA]] on recent ATI GPUs and the newest nVidia GPUs.&lt;br /&gt;
*&#039;&#039;&#039;[https://secure.wikimedia.org/wikipedia/en/wiki/X264 x264]&#039;&#039;&#039; - Open Source (free) implementation of H.264 standard. Can be offloaded via [[DXVA]] on nVidia and ATI GPUs.&lt;br /&gt;
&lt;br /&gt;
==Audio Codecs==&lt;br /&gt;
Several audio formats exist as well, these apply to both movies and music/sounds.  Here are some of the common ones used on BakaBT.&lt;br /&gt;
&lt;br /&gt;
&amp;lt;!-- Needs verification  --&amp;gt;&lt;br /&gt;
&lt;br /&gt;
*[https://secure.wikimedia.org/wikipedia/en/wiki/MP3 MP3]: Lossy codec that is commonly supported by just about every media player out there. Can be easily copied over to the portable media player of your choice. Quality is highly dependent on bitrate.&lt;br /&gt;
&lt;br /&gt;
*[https://secure.wikimedia.org/wikipedia/en/wiki/Flac FLAC]: Lossless codec. Offers potentially higher audio quality than MP3, at the cost of higher file size. Is not commonly supported by standard media players or portable media players. Common media players such as Windows Media Player can be made compatible using a plug-in, while other media players such as Media Player Classic Home Cinema have built-in support.&lt;br /&gt;
&lt;br /&gt;
==Text Codecs==&lt;br /&gt;
Text codecs are used for files that contain softsubs, they are basically text that is rendered during playback separately from the video track instead of being rendered directly to the video file during encoding (hardsubs).  The main advantage of using softsubs being that multiple subtitle/karaoke tracks can be packaged into one file or not used at all during playback.  The main drawback is that it adds more overhead to the file.&lt;br /&gt;
&lt;br /&gt;
The softsub file is sometimes a separate file, .sub for example, but is usually inside the [[Containers|container]] file.  Here are the most common codecs used on BakaBT:&lt;br /&gt;
 &lt;br /&gt;
*&#039;&#039;&#039;SubStation Alpha&#039;&#039;&#039; - Commonly used on BakaBT.  Supports both styled text and metadata.  Has a precision of 10 milliseconds.  Frequently encoded within a [[Containers|container]], thus rarely seen as a separate file.  Uses a .ssa or .ass extension.&lt;br /&gt;
*&#039;&#039;&#039;VobSub&#039;&#039;&#039; - Common on BakaBT as well.  VobSub is image-based so it doesn&#039;t support styled text or metadata.  This is the codec used when the subtitles are ripped directly from the source DVD.  These have a precision of 1 millisecond.&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
* Hardsubs are rendered directly into the video stream so a separate codec isn&#039;t required&lt;br /&gt;
&lt;br /&gt;
==References==&lt;br /&gt;
*&#039;&#039;&#039;[http://en.wikipedia.org/wiki/Video_codec Video codec]&#039;&#039;&#039; from Wikipedia&lt;br /&gt;
*&#039;&#039;&#039;[http://en.wikipedia.org/wiki/List_of_codecs#Audio_codecs Audio codecs]&#039;&#039;&#039; from Wikipedia&lt;br /&gt;
*&#039;&#039;&#039;[http://en.wikipedia.org/wiki/Subtitle_(captioning)#Types Subtitle (captioning)]&#039;&#039;&#039; from Wikipedia&lt;/div&gt;</summary>
		<author><name>JackMasamune</name></author>
	</entry>
	<entry>
		<id>http://wiki.bakabt.me/index.php?title=Containers&amp;diff=4765</id>
		<title>Containers</title>
		<link rel="alternate" type="text/html" href="http://wiki.bakabt.me/index.php?title=Containers&amp;diff=4765"/>
		<updated>2010-07-14T14:06:28Z</updated>

		<summary type="html">&lt;p&gt;JackMasamune: /* Containers */  Added Wikipedia links&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;This article is meant to be purely informational, offering an overview of common containers found on BakaBT.&lt;br /&gt;
&lt;br /&gt;
==Containers==&lt;br /&gt;
&lt;br /&gt;
A container format is a file format that can contain various types of data, compressed by  means of standardized audio/video codecs. The container file is used to identify and interleave the different data types. Simpler container formats can contain different types of audio codecs, while more advanced container formats can support multiple audio and video streams, subtitles, chapter-information, and meta-data - along with the synchronization information needed to play back the various streams together.&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
Some containers are exclusive to audio:&lt;br /&gt;
* [https://secure.wikimedia.org/wikipedia/en/wiki/AIFF AIFF] (IFF file format, widely used on Mac OS platform)&lt;br /&gt;
* [https://secure.wikimedia.org/wikipedia/en/wiki/WAV WAV]  (RIFF file format, widely used on Microsoft Windows platform)&lt;br /&gt;
* [https://secure.wikimedia.org/wikipedia/en/wiki/XMF XMF]  (XMF Extensible Music Format XMF)&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
Other flexible containers can hold many types of audio and video, as well as other media. The most popular containers currently used on BakaBT are, but not limited too, the following:&lt;br /&gt;
* [https://secure.wikimedia.org/wikipedia/en/wiki/Advanced_Systems_Format Advanced Systems Format (ASF)] (standard container for Microsoft Windows Media Audio WMA and WMV&lt;br /&gt;
* [https://secure.wikimedia.org/wikipedia/en/wiki/Audio_Video_Interleave Audio Video Interleave (AVI)] (the standard Microsoft Windows container, also based on RIFF)&lt;br /&gt;
* [https://secure.wikimedia.org/wikipedia/en/wiki/DivX DivX] (Media format created by DivX, Inc.)&lt;br /&gt;
* [https://secure.wikimedia.org/wikipedia/en/wiki/Matroska Matroska / MKV] (not standard for any codec or system, but it is an open standard and open source container format).&lt;br /&gt;
* [https://secure.wikimedia.org/wikipedia/en/wiki/MPEG-TS MPEG transport stream|MPEG-2 transport stream (TS)] (a.k.a. MPEG-TS) (standard container for digital broadcasting; typically contains multiple video and audio streams, and an electronic program guide) and program stream (PS)&lt;br /&gt;
* [https://secure.wikimedia.org/wikipedia/en/wiki/MPEG-4_Part_14 MPEG-4 Part 14|MP4] (standard audio and video container for the MPEG-4 multimedia portfolio)&lt;br /&gt;
* [https://secure.wikimedia.org/wikipedia/en/wiki/Ogg Ogg] (standard audio container for Xiph.Org Foundation|Xiph.org codecs, can also contain video (as in Ogg Theora))&lt;br /&gt;
* [https://secure.wikimedia.org/wikipedia/en/wiki/Ogg#OGM OGM] (&amp;quot;Ogg Media&amp;quot;, standard video container for Xiph.Org Foundation codecs)&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
There are many other container formats, only major ones and those pertaining to BakaBT will be mentioned here.&lt;br /&gt;
&lt;br /&gt;
==Issues==&lt;br /&gt;
The following are several issues which exist over the container to use.&lt;br /&gt;
# Popularity; how widely supported a container is. (Not a big issue with CCCP)&lt;br /&gt;
# Overhead; the difference in file-size between two files with the same content in a different container. (MyVideo.ogg is 230Mb while MyVideo.mkv is 220Mb and final output is the same, just an example of this, not an actual case.)&lt;br /&gt;
# Support for advanced codec functionality.  Older formats such as AVI do not support new codec features like B-frames, Variable_bitrate (VBR) audio, Variable frame rate (VFR) natively, although the format may be &amp;quot;hacked&amp;quot; to add support, creating compatibility problems.&lt;br /&gt;
# Support for advanced content, such as chapters, subtitles, meta-tags, user-data.&lt;br /&gt;
# Support of streaming media.  (Not an issue with BakaBT though)&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
== References ==&lt;br /&gt;
#[http://en.wikipedia.org/wiki/Container_format_(digital) Wikipedia Container format]&lt;/div&gt;</summary>
		<author><name>JackMasamune</name></author>
	</entry>
	<entry>
		<id>http://wiki.bakabt.me/index.php?title=Windows_Video_Playback&amp;diff=4764</id>
		<title>Windows Video Playback</title>
		<link rel="alternate" type="text/html" href="http://wiki.bakabt.me/index.php?title=Windows_Video_Playback&amp;diff=4764"/>
		<updated>2010-07-14T13:54:36Z</updated>

		<summary type="html">&lt;p&gt;JackMasamune: /* Recommended */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;This article is aimed at providing useful information regarding playback on Windows based computers. &lt;br /&gt;
&lt;br /&gt;
==A List of Commonly Used Players==&lt;br /&gt;
&lt;br /&gt;
===&amp;lt;span style=&amp;quot;color:green&amp;quot;&amp;gt;Recommended&amp;lt;/span&amp;gt;===&lt;br /&gt;
;[http://sourceforge.net/projects/guliverkli/ Media Player Classic (MPC)]:This player is included in [[CCCP]]. It is recommended that you use this player, however it must be configured correctly. Refer to [http://forums.bakabt.com/index.php?topic=13746.0 this] guide. For 64-bit Windows users it even has a x64 version, but that version will only work with 64-bit codecs, so for now it is recommended that you use the 32-bit version until 64-bit codecs mature more.&lt;br /&gt;
Please note that this player has been superseded by Media Player Classic Home Cinema (MPCHC). Please use this newer version of MPC bundled with the newest CCCP (which contains a custom build of the player).&lt;br /&gt;
&lt;br /&gt;
;[http://www.inmatrix.com/ Zoom Player]:This player is &#039;&#039;&#039;no longer&#039;&#039;&#039; included in [[CCCP]] because the free version of it is no longer being developed and it may have playback issues in Vista. Very nice, relatively easy to use interface. Do not download the Professional versions, download the standard edition. The professional versions are trials, they stop working after a while. Has an installation center that installs all CCCP codecs for you.&lt;br /&gt;
&lt;br /&gt;
;[http://www.kmplayer.com/forums/showthread.php?t=4094 The KMPlayer]:Good player with internal and external filter support, handles a wide range of subtitles and allows you to capture audio, video, and screenshots in many ways but for better user experience it needs to be [[KMPlayer| tweaked]] to display styled subs and ordered chapters properly.&lt;br /&gt;
&lt;br /&gt;
===&amp;lt;span style=&amp;quot;color:orange&amp;quot;&amp;gt;Acceptable&amp;lt;/span&amp;gt;===&lt;br /&gt;
;[http://www.allplayer.org/ ALLPlayer]:This player will utilize CCCP, but has a confusing interface and useless features. It is also rather homely. &lt;br /&gt;
&lt;br /&gt;
;[http://coreplayer.com/ Coreplayer]:Developed by the same team that developed the CoreAVC codec. It does not uililize [[CCCP]], meaning it only uses internal filters. Also it will not render subtitles. &lt;br /&gt;
&lt;br /&gt;
;[http://www.cowonamerica.com/products/jetaudio/ JetAudio Player]:Supports 57 file formats and it includes tools for ripping, burning, external recording, file conversion, and broadcasting. Features are highly customizable, but it has no built-in MP3 encoding.&lt;br /&gt;
&lt;br /&gt;
;[http://www.mplayerhq.hu/ MPlayer]:This player only utilizes internal codecs &amp;amp; filters. It will play videos as well as [[CCCP]] can, but the keyboard orientated interface can be confusing to people used to menu driven players.&lt;br /&gt;
&lt;br /&gt;
;[http://www.corecoded.com/ The Core Media Player (TCMP)]:Not to be confused with the Coreplayer (see above). It will work fine if you don&#039;t use the included filters. &lt;br /&gt;
&lt;br /&gt;
;[http://www.winamp.com/ WinAmp 5]:Will work fine if configured correctly. Subtitles must be loaded manually. &lt;br /&gt;
&lt;br /&gt;
;[http://www.microsoft.com/windows/windowsmedia/ Windows Media Player]:Not to be confused with Media Player Classic (see above). Will play fine, but will sometimes crash. Various other issues.&lt;br /&gt;
&lt;br /&gt;
===&amp;lt;span style=&amp;quot;color:red&amp;quot;&amp;gt;Not Recommended&amp;lt;/span&amp;gt;===&lt;br /&gt;
&lt;br /&gt;
;[http://www.bsplayer.org/ BSPlayer]:We don&#039;t suggest anyone uses this player. It is filled with bugs. &lt;br /&gt;
&lt;br /&gt;
;[http://www.divx.com/ DivX Player]:This player is semi-compatible with [[CCCP]]. It will play MKV, OGM, and MP4 files, but it cannot play audio files. Not recommended for use. Tends to pixelate the image in certain instances.&lt;br /&gt;
&lt;br /&gt;
;[http://ffmpeg.mplayerhq.hu/ FFPlayer]:Doesn&#039;t utilize vsfilter. &lt;br /&gt;
&lt;br /&gt;
;[http://www.apple.com/quicktime/ QuickTime]:Will play AVI and MP4 files (depends on installed QT codecs), but cannot handle MKV or OGM files. Ignores [[CCCP]]. To play QuickTime files, it is recommended that you use the [http://www.free-codecs.com/download/QuickTime_Alternative.htm QT Alternative] which works in conjuction with Media Player Classic. &lt;br /&gt;
&lt;br /&gt;
;[http://www.real.com/ RealPlayer 10]:Loads [[CCCP]] with AVI files, but won&#039;t load MKV or OGM files. To play Real files, it is recommended that you use the [http://www.free-codecs.com/download/Real_Alternative.htm Real Alternative] which works in conjunction with Media Player Classic. &lt;br /&gt;
&lt;br /&gt;
;[http://www.videolan.org/vlc/ VLC Media Player]:This player supports nearly every media filetype one may encounter, but is not recommended for use. It does not utilize external codecs, and might not support some new features of the MKV container. It is currently still under development, but BakaBT does not recommend its use for the purpose of watching most fansubs (especially more recent ones). Only recommended to keep around as a last-ditch effort for playing stubborn video files.&lt;br /&gt;
&lt;br /&gt;
==Codecs and Codec Packs==&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
===Codec Packs===&lt;br /&gt;
&lt;br /&gt;
;[[CCCP]] (&amp;lt;span style=&amp;quot;color:limegreen&amp;quot;&amp;gt;Recommended&amp;lt;/span&amp;gt;):&lt;br /&gt;
* [[CCCP]] stands for Combined Community Codec Pack and was created to consolidate the filter packs of many different fansub groups into a single reliable filter pack that is shared by all of the fansub groups.&lt;br /&gt;
* Stability is high, [[CCCP]] claim to be bug free.&lt;br /&gt;
* Lightweighted (it only includes what you really need).&lt;br /&gt;
* Bundled with Media Player Classic Home Cinema, the newest build of MPC since the original developer retired the project. Much more efficient than MPC.&lt;br /&gt;
[http://www.cccp-project.net/ CCCP Homepage]&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
;[http://www.free-codecs.com/download/K_Lite_Mega_Codec_Pack.htm K-Lite Mega Codec Pack]:&lt;br /&gt;
* Plays almost every video available, even rare (for playback of anime you don&#039;t need most of them).&lt;br /&gt;
* Comes bundled with Media Player Classic.&lt;br /&gt;
[http://www.free-codecs.com/download/K_Lite_Mega_Codec_Pack.htm K-Lite Mega Codec Pack on Free-Codecs.com].&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
;[http://www.xpcodecpack.com/ XP Codec Pack]:&lt;br /&gt;
* Plays many different formats, it&#039;s like a little heavier pack than [[CCCP]].&lt;br /&gt;
* Gets regular updates (this means it may not be stable all times).&lt;br /&gt;
[http://www.xpcodecpack.com/ XP Codec Pack Homepage]&lt;br /&gt;
&lt;br /&gt;
===Codecs===&lt;br /&gt;
;[[CoreAVC]] Professional (&amp;lt;span style=&amp;quot;color:limegreen&amp;quot;&amp;gt;Recommended&amp;lt;/span&amp;gt; if you have trouble with h264 encodes):&lt;br /&gt;
Refer to [http://forums.bakabt.com/index.php?topic=8513.0 Psyren&#039;s guide]&lt;br /&gt;
&lt;br /&gt;
;[http://www.free-codecs.com/download/Real_Alternative.htm Real Alternative]&lt;br /&gt;
Allows you to play Real Media (.rm) files in a media player without the need to install Real Player.&lt;br /&gt;
;[http://www.free-codecs.com/download/QuickTime_Alternative.htm QuickTime Alternative]&lt;br /&gt;
Allows you to play QuickTime (.mov) files in a media player without the need to install QuickTime. It also allows you to stream video and sound from the Internet using QuickTime.&lt;/div&gt;</summary>
		<author><name>JackMasamune</name></author>
	</entry>
	<entry>
		<id>http://wiki.bakabt.me/index.php?title=User:JackMasamune&amp;diff=4763</id>
		<title>User:JackMasamune</title>
		<link rel="alternate" type="text/html" href="http://wiki.bakabt.me/index.php?title=User:JackMasamune&amp;diff=4763"/>
		<updated>2010-07-14T13:49:13Z</updated>

		<summary type="html">&lt;p&gt;JackMasamune: Created page with &amp;#039;==My style of Wikipedia linking==  People will probably notice, but when I link to Wikipedia I use the SSL protected way of linking. It&amp;#039;s just safer.&amp;#039;&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;==My style of Wikipedia linking==&lt;br /&gt;
&lt;br /&gt;
People will probably notice, but when I link to Wikipedia I use the SSL protected way of linking. It&#039;s just safer.&lt;/div&gt;</summary>
		<author><name>JackMasamune</name></author>
	</entry>
	<entry>
		<id>http://wiki.bakabt.me/index.php?title=Codecs&amp;diff=4762</id>
		<title>Codecs</title>
		<link rel="alternate" type="text/html" href="http://wiki.bakabt.me/index.php?title=Codecs&amp;diff=4762"/>
		<updated>2010-07-14T13:47:24Z</updated>

		<summary type="html">&lt;p&gt;JackMasamune: /* Video Codecs */  Added links to Wikipedia for each codec&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;This article is meant as a brief explanation of the most common codecs used on BakaBT and is purely information.  For codec troubleshooting, see the [[Common_Playback_Problems|Common Playback Problems]] BakaBT Wiki article, or visit the [http://forums.BakaBT.com/index.php?board=27.0 Playback Forum] for help playing/installing codecs.&lt;br /&gt;
&lt;br /&gt;
==Overview==&lt;br /&gt;
A codec is a device or software that is capable of decoding and/or encoding data, wether it be a digital data stream or signal.  Basically, they are what we use to encode and decode virtually all of the content found on BakaBT.  For the most part, we only worry about the decoding.&lt;br /&gt;
&lt;br /&gt;
==Compression==&lt;br /&gt;
Basically, two types of compression exist, &#039;&#039;Lossy&#039;&#039;, and &#039;&#039;Lossles&#039;&#039;.  For example, most of the anime found on BakaBT will use &#039;&#039;Lossy codecs&#039;&#039;, where as several soundtracks use &#039;&#039;Lossless&#039;&#039;.&lt;br /&gt;
&lt;br /&gt;
*&#039;&#039;&#039;Lossy codecs&#039;&#039;&#039; - Many of the more popular codecs in the software world are lossy, meaning that they reduce quality by some amount in order to achieve compression. Smaller data sets ease the strain on relatively expensive storage sub-systems such as non-volatile memory and hard disk, as well as write-once-read-many formats such as CD-ROM, DVD and Blu-ray Disc.&lt;br /&gt;
*&#039;&#039;&#039;Lossless codecs&#039;&#039;&#039; - There are also many lossless codecs which are typically used for archiving data in a compressed form while retaining all of the information present in the original stream. If preserving the original quality of the stream is more important than eliminating the correspondingly larger data sizes, lossless codecs are preferred. Especially if the data is to undergo further processing (for example editing) in which case the repeated application of processing (encoding and decoding) on lossy codecs will degrade the quality of the resulting data such that it is readily identifiable (visually, audibly or both). Using more than one codec or encoding scheme successively can also degrade quality significantly. The decreasing cost of storage capacity and network bandwidth has a tendency to reduce the need for lossy codecs for some media.&lt;br /&gt;
&lt;br /&gt;
==Video Codecs==&lt;br /&gt;
Currently, many formats exist for video codecs, here are the more common ones found on BakaBT:&lt;br /&gt;
&lt;br /&gt;
&amp;lt;!--  Needs some more information  --&amp;gt;&lt;br /&gt;
*&#039;&#039;&#039;[https://secure.wikimedia.org/wikipedia/en/wiki/MPEG-2 MPEG-2]&#039;&#039;&#039; - the codec which is used on DVDs and on some Blu-ray/HD-DVD discs.&lt;br /&gt;
*&#039;&#039;&#039;[https://secure.wikimedia.org/wikipedia/en/wiki/MPEG-4_Part_2 MPEG-4 Part 2]&#039;&#039;&#039; - also known as MPEG-4 SP/MPEG-4 ASP. Popular software implemantations are: DivX, Xvid, 3ivx&lt;br /&gt;
*&#039;&#039;&#039;[https://secure.wikimedia.org/wikipedia/en/wiki/H.264 MPEG-4 Part 10]&#039;&#039;&#039; - also known as MPEG-4 AVC/H.264. Used on Blu-ray/HD-DVD discs.&lt;br /&gt;
*&#039;&#039;&#039;[https://secure.wikimedia.org/wikipedia/en/wiki/WMV WMV]&#039;&#039;&#039; - codec developed by Microsoft.&lt;br /&gt;
*&#039;&#039;&#039;[https://secure.wikimedia.org/wikipedia/en/wiki/VC-1 VC-1]&#039;&#039;&#039; - H.264 rival. Used on Blu-ray/HD-DVD discs. Can be offloaded via [[DXVA]] on recent ATI GPUs and the newest nVidia GPUs.&lt;br /&gt;
*&#039;&#039;&#039;[https://secure.wikimedia.org/wikipedia/en/wiki/X264 x264]&#039;&#039;&#039; - Open Source (free) implementation of H.264 standard. Can be offloaded via [[DXVA]] on nVidia and ATI GPUs.&lt;br /&gt;
&lt;br /&gt;
==Audio Codecs==&lt;br /&gt;
Several audio formats exist as well, these apply to both movies and music/sounds.  Here are some of the common ones used on BakaBT.   (Coming soon!)&lt;br /&gt;
&lt;br /&gt;
&amp;lt;!-- Needs verification  --&amp;gt;&lt;br /&gt;
==Text Codecs==&lt;br /&gt;
Text codecs are used for files that contain softsubs, they are basically text that is rendered during playback separately from the video track instead of being rendered directly to the video file during encoding (hardsubs).  The main advantage of using softsubs being that multiple subtitle/karaoke tracks can be packaged into one file or not used at all during playback.  The main drawback is that it adds more overhead to the file.&lt;br /&gt;
&lt;br /&gt;
The softsub file is sometimes a separate file, .sub for example, but is usually inside the [[Containers|container]] file.  Here are the most common codecs used on BakaBT:&lt;br /&gt;
 &lt;br /&gt;
*&#039;&#039;&#039;SubStation Alpha&#039;&#039;&#039; - Commonly used on BakaBT.  Supports both styled text and metadata.  Has a precision of 10 milliseconds.  Frequently encoded within a [[Containers|container]], thus rarely seen as a separate file.  Uses a .ssa or .ass extension.&lt;br /&gt;
*&#039;&#039;&#039;VobSub&#039;&#039;&#039; - Common on BakaBT as well.  VobSub is image-based so it doesn&#039;t support styled text or metadata.  This is the codec used when the subtitles are ripped directly from the source DVD.  These have a precision of 1 millisecond.&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
* Hardsubs are rendered directly into the video stream so a separate codec isn&#039;t required&lt;br /&gt;
&lt;br /&gt;
==References==&lt;br /&gt;
*&#039;&#039;&#039;[http://en.wikipedia.org/wiki/Video_codec Video codec]&#039;&#039;&#039; from Wikipedia&lt;br /&gt;
*&#039;&#039;&#039;[http://en.wikipedia.org/wiki/List_of_codecs#Audio_codecs Audio codecs]&#039;&#039;&#039; from Wikipedia&lt;br /&gt;
*&#039;&#039;&#039;[http://en.wikipedia.org/wiki/Subtitle_(captioning)#Types Subtitle (captioning)]&#039;&#039;&#039; from Wikipedia&lt;/div&gt;</summary>
		<author><name>JackMasamune</name></author>
	</entry>
	<entry>
		<id>http://wiki.bakabt.me/index.php?title=Codecs&amp;diff=4761</id>
		<title>Codecs</title>
		<link rel="alternate" type="text/html" href="http://wiki.bakabt.me/index.php?title=Codecs&amp;diff=4761"/>
		<updated>2010-07-14T13:43:40Z</updated>

		<summary type="html">&lt;p&gt;JackMasamune: /* Video Codecs */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;This article is meant as a brief explanation of the most common codecs used on BakaBT and is purely information.  For codec troubleshooting, see the [[Common_Playback_Problems|Common Playback Problems]] BakaBT Wiki article, or visit the [http://forums.BakaBT.com/index.php?board=27.0 Playback Forum] for help playing/installing codecs.&lt;br /&gt;
&lt;br /&gt;
==Overview==&lt;br /&gt;
A codec is a device or software that is capable of decoding and/or encoding data, wether it be a digital data stream or signal.  Basically, they are what we use to encode and decode virtually all of the content found on BakaBT.  For the most part, we only worry about the decoding.&lt;br /&gt;
&lt;br /&gt;
==Compression==&lt;br /&gt;
Basically, two types of compression exist, &#039;&#039;Lossy&#039;&#039;, and &#039;&#039;Lossles&#039;&#039;.  For example, most of the anime found on BakaBT will use &#039;&#039;Lossy codecs&#039;&#039;, where as several soundtracks use &#039;&#039;Lossless&#039;&#039;.&lt;br /&gt;
&lt;br /&gt;
*&#039;&#039;&#039;Lossy codecs&#039;&#039;&#039; - Many of the more popular codecs in the software world are lossy, meaning that they reduce quality by some amount in order to achieve compression. Smaller data sets ease the strain on relatively expensive storage sub-systems such as non-volatile memory and hard disk, as well as write-once-read-many formats such as CD-ROM, DVD and Blu-ray Disc.&lt;br /&gt;
*&#039;&#039;&#039;Lossless codecs&#039;&#039;&#039; - There are also many lossless codecs which are typically used for archiving data in a compressed form while retaining all of the information present in the original stream. If preserving the original quality of the stream is more important than eliminating the correspondingly larger data sizes, lossless codecs are preferred. Especially if the data is to undergo further processing (for example editing) in which case the repeated application of processing (encoding and decoding) on lossy codecs will degrade the quality of the resulting data such that it is readily identifiable (visually, audibly or both). Using more than one codec or encoding scheme successively can also degrade quality significantly. The decreasing cost of storage capacity and network bandwidth has a tendency to reduce the need for lossy codecs for some media.&lt;br /&gt;
&lt;br /&gt;
==Video Codecs==&lt;br /&gt;
Currently, many formats exist for video codecs, here are the more common ones found on BakaBT:&lt;br /&gt;
&lt;br /&gt;
&amp;lt;!--  Needs some more information  --&amp;gt;&lt;br /&gt;
*&#039;&#039;&#039;MPEG-2&#039;&#039;&#039; - the codec which is used on DVDs and on some Blu-ray/HD-DVD discs.&lt;br /&gt;
*&#039;&#039;&#039;MPEG-4 Part 2&#039;&#039;&#039; - also known as MPEG-4 SP/MPEG-4 ASP. Popular software implemantations are: DivX, Xvid, 3ivx&lt;br /&gt;
*&#039;&#039;&#039;MPEG-4 Part 10&#039;&#039;&#039; - also known as MPEG-4 AVC/H.264. Used on Blu-ray/HD-DVD discs.&lt;br /&gt;
*&#039;&#039;&#039;WMV&#039;&#039;&#039; - codec developed by Microsoft.&lt;br /&gt;
*&#039;&#039;&#039;VC-1&#039;&#039;&#039; - H.264 rival. Used on Blu-ray/HD-DVD discs. Can be offloaded via [[DXVA]] on recent ATI GPUs and the newest nVidia GPUs.&lt;br /&gt;
*&#039;&#039;&#039;x264&#039;&#039;&#039; - Open Source (free) implementation of H.264 standard. Can be offloaded via [[DXVA]] on nVidia and ATI GPUs.&lt;br /&gt;
&lt;br /&gt;
==Audio Codecs==&lt;br /&gt;
Several audio formats exist as well, these apply to both movies and music/sounds.  Here are some of the common ones used on BakaBT.   (Coming soon!)&lt;br /&gt;
&lt;br /&gt;
&amp;lt;!-- Needs verification  --&amp;gt;&lt;br /&gt;
==Text Codecs==&lt;br /&gt;
Text codecs are used for files that contain softsubs, they are basically text that is rendered during playback separately from the video track instead of being rendered directly to the video file during encoding (hardsubs).  The main advantage of using softsubs being that multiple subtitle/karaoke tracks can be packaged into one file or not used at all during playback.  The main drawback is that it adds more overhead to the file.&lt;br /&gt;
&lt;br /&gt;
The softsub file is sometimes a separate file, .sub for example, but is usually inside the [[Containers|container]] file.  Here are the most common codecs used on BakaBT:&lt;br /&gt;
 &lt;br /&gt;
*&#039;&#039;&#039;SubStation Alpha&#039;&#039;&#039; - Commonly used on BakaBT.  Supports both styled text and metadata.  Has a precision of 10 milliseconds.  Frequently encoded within a [[Containers|container]], thus rarely seen as a separate file.  Uses a .ssa or .ass extension.&lt;br /&gt;
*&#039;&#039;&#039;VobSub&#039;&#039;&#039; - Common on BakaBT as well.  VobSub is image-based so it doesn&#039;t support styled text or metadata.  This is the codec used when the subtitles are ripped directly from the source DVD.  These have a precision of 1 millisecond.&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
* Hardsubs are rendered directly into the video stream so a separate codec isn&#039;t required&lt;br /&gt;
&lt;br /&gt;
==References==&lt;br /&gt;
*&#039;&#039;&#039;[http://en.wikipedia.org/wiki/Video_codec Video codec]&#039;&#039;&#039; from Wikipedia&lt;br /&gt;
*&#039;&#039;&#039;[http://en.wikipedia.org/wiki/List_of_codecs#Audio_codecs Audio codecs]&#039;&#039;&#039; from Wikipedia&lt;br /&gt;
*&#039;&#039;&#039;[http://en.wikipedia.org/wiki/Subtitle_(captioning)#Types Subtitle (captioning)]&#039;&#039;&#039; from Wikipedia&lt;/div&gt;</summary>
		<author><name>JackMasamune</name></author>
	</entry>
	<entry>
		<id>http://wiki.bakabt.me/index.php?title=Main_Page&amp;diff=4760</id>
		<title>Main Page</title>
		<link rel="alternate" type="text/html" href="http://wiki.bakabt.me/index.php?title=Main_Page&amp;diff=4760"/>
		<updated>2010-07-14T13:38:33Z</updated>

		<summary type="html">&lt;p&gt;JackMasamune: /* To Do List */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;&amp;lt;!-- &lt;br /&gt;
&lt;br /&gt;
------------------------------Banner------------------------------&amp;gt;&lt;br /&gt;
{| style=&amp;quot;width:100%; background:#402365; margin-top:1.2em; border:1px solid #ccc;&amp;quot;&lt;br /&gt;
|style=&amp;quot;width:56%; color:#000&amp;quot;| &amp;lt;!-- &lt;br /&gt;
&lt;br /&gt;
-----------&amp;quot;Welcome to BakaBT&amp;quot;----------&amp;gt;&lt;br /&gt;
{| style=&amp;quot;width:99%; border:solid 0px; background:none;&amp;quot;&lt;br /&gt;
|style=&amp;quot;width:600px; text-align:center; white-space:nowrap; color:#fff;&amp;quot;|&lt;br /&gt;
&amp;lt;div style=&amp;quot;font-size:162%; border:none; margin:0; padding:.1em; color:#fff;&amp;quot;&amp;gt;The BakaBT Wiki!&amp;lt;/div&amp;gt;&lt;br /&gt;
&amp;lt;div style=&amp;quot;font-size:90%; border:none; margin:0; padding:.1em; color:#c06c8d;&amp;quot;&amp;gt;&#039;&#039;&#039;Welcome to the new BakaBT Wiki. Still under construction.&#039;&#039;&#039; &amp;lt;/div&amp;gt;&lt;br /&gt;
|}&amp;lt;!--&lt;br /&gt;
&lt;br /&gt;
------------Text----------&amp;gt;&lt;br /&gt;
|style=&amp;quot;width:1%; font-size:95%;&amp;quot;|&lt;br /&gt;
|}&lt;br /&gt;
Welcome to the BakaBT Wiki. We have a lot of useful information here.&lt;br /&gt;
For general problems (such as with your PC or BitTorrent in general), start with Google.&lt;br /&gt;
For anything BakaBT-related, take the following steps:&lt;br /&gt;
&lt;br /&gt;
 &lt;br /&gt;
{|border=&amp;quot;1&amp;quot;&lt;br /&gt;
|style=&amp;quot;border:none;&amp;quot;|&amp;lt;span style=&amp;quot;font-size:14pt;font-weight:bold;&amp;quot;&amp;gt;How to search effectively&amp;lt;/span&amp;gt;&lt;br /&gt;
&lt;br /&gt;
&amp;lt;b&amp;gt;Step 01:&amp;lt;/b&amp;gt; Search our Wiki database. Use phrases like &amp;quot;video playback&amp;quot; or &amp;quot;torrent error&amp;quot; to get better results. You can look at our information index down below or in our [[FAQ]] which contains the most commonly asked questions.&lt;br /&gt;
&lt;br /&gt;
&amp;lt;b&amp;gt;Step 02:&amp;lt;/b&amp;gt; If the Wiki didn&#039;t have what you were looking for, go to our [http://forums.bakabt.com forums] and seek answers there. We advise all to do a forum search before posting in a thread in the appropriate location. Chances are your question has already been answered.&lt;br /&gt;
&lt;br /&gt;
&amp;lt;b&amp;gt;Step 03:&amp;lt;/b&amp;gt; Ask us on [[IRC]]. Our support channel, #bakabt-support is located on irc.rizon.net! Have patience and our staff will get to you as soon as possible. If you do not wish to use IRC, proceed to Step 04.&lt;br /&gt;
&lt;br /&gt;
&amp;lt;b&amp;gt;Step 04:&amp;lt;/b&amp;gt; All the above steps failed! What now? Use our help form. When filling out the form, be descriptive and detailed. Have patience. Our staff will try and help out as soon as possible.&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
&#039;&#039;&#039;NOTE:&#039;&#039;&#039; Only ask for help through one of the above means. Don&#039;t ask on the forums or on IRC &amp;lt;u&amp;gt;until you&#039;ve read the wiki and FAQ&amp;lt;/u&amp;gt;. And don&#039;t use the help form unless it can&#039;t be asked on the forums or on IRC. &#039;&#039;Spamming all support channels with the same question simultaneously is a sure way to piss site staff off.&#039;&#039;&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
=Important Information=&lt;br /&gt;
{|cellspacing=&amp;quot;20&amp;quot;&lt;br /&gt;
|-style=&amp;quot;font-size: 14pt;&amp;quot;&lt;br /&gt;
!width=&amp;quot;33%&amp;quot;|New to BakaBT?&lt;br /&gt;
!width=&amp;quot;33%&amp;quot;|How to upload?&lt;br /&gt;
!width=&amp;quot;33%&amp;quot;|Tips for uploaders&lt;br /&gt;
&lt;br /&gt;
|-valign=&amp;quot;top&amp;quot;&lt;br /&gt;
|width=&amp;quot;33%&amp;quot;|&lt;br /&gt;
* [[Site Rules|Rules you &#039;&#039;must&#039;&#039; follow]] &#039;&#039;(Site Rules)&#039;&#039;&lt;br /&gt;
* [[For First Timers|How to seed and earn ratio!]] &#039;&#039;(For First Timers)&#039;&#039;&lt;br /&gt;
* [[FAQ|Most questions are answered here]] &#039;&#039;(FAQ)&#039;&#039;&lt;br /&gt;
* [[BT Clients#Whitelist|Bittorrent clients we allow]] &#039;&#039;(Whitelist)&#039;&#039;&lt;br /&gt;
&lt;br /&gt;
|width=&amp;quot;33%&amp;quot;|&lt;br /&gt;
* [[How to make an offer|Offering a torrent]] &#039;&#039;(Description Guide)&#039;&#039;&lt;br /&gt;
* [[Format Preferences|What is accepted]] &#039;&#039;(Format Preferences)&#039;&#039;&lt;br /&gt;
* [[DO NOT UPLOAD|DO NOT UPLOAD!]] &#039;&#039;(Blacklist)&#039;&#039;&lt;br /&gt;
* [[How to create torrent files|How to create .torrent files to upload here]]&lt;br /&gt;
&lt;br /&gt;
|width=&amp;quot;33%&amp;quot;|&lt;br /&gt;
* [[Guide to Uploading Manga|Tips for manga uploads]]&lt;br /&gt;
* [[Offer Templates|Description templates]]&lt;br /&gt;
* [[Convert FLAC to MP3|How to convert FLAC files to MP3 files]]&lt;br /&gt;
&lt;br /&gt;
|-style=&amp;quot;font-size: 14pt;&amp;quot;&lt;br /&gt;
!width=&amp;quot;33%&amp;quot;|In trouble?&lt;br /&gt;
!width=&amp;quot;33%&amp;quot;|Other problems?&lt;br /&gt;
!width=&amp;quot;33%&amp;quot;|&lt;br /&gt;
&lt;br /&gt;
|-valign=&amp;quot;top&amp;quot;&lt;br /&gt;
|width=&amp;quot;33%&amp;quot;|&lt;br /&gt;
* [[Account Restrictions|Why was I warned/disabled/banned?]] &#039;&#039;(Account Restrictions)&#039;&#039;&lt;br /&gt;
* [[For First Timers#Re-seeding Downloaded Files with Different Clients|How to seed files I already have]]&lt;br /&gt;
* [[PFCorner|PFCorner: An Easy Seedbox Service]]&lt;br /&gt;
&lt;br /&gt;
|width=&amp;quot;33%&amp;quot;|&lt;br /&gt;
* [[Troubleshooting|General Troubleshooting]]&lt;br /&gt;
* [[The BakaBT Website|Visual Guide to BakaBT&#039;s Website]]&lt;br /&gt;
&lt;br /&gt;
|width=&amp;quot;33%&amp;quot;|&lt;br /&gt;
&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
=Guides &amp;amp; Resources=&lt;br /&gt;
{|cellspacing=&amp;quot;20&amp;quot;&lt;br /&gt;
|-style=&amp;quot;font-size: 14pt;&amp;quot;&lt;br /&gt;
!width=&amp;quot;50%&amp;quot;|Bittorrent (BT)&lt;br /&gt;
!width=&amp;quot;50%&amp;quot;|Internet Relay Protocol (IRC)&lt;br /&gt;
&lt;br /&gt;
|-valign=&amp;quot;top&amp;quot;&lt;br /&gt;
|width=&amp;quot;50%&amp;quot;|&lt;br /&gt;
* [http://en.wikipedia.org/wiki/BitTorrent_(protocol) About the Bittorrent protocol]&lt;br /&gt;
* [[BT Terminology]]&lt;br /&gt;
* [[BT Clients]]&lt;br /&gt;
&lt;br /&gt;
|width=&amp;quot;50%&amp;quot;|&lt;br /&gt;
* [[IRC|Quick Guide to IRC]]&lt;br /&gt;
&lt;br /&gt;
|-style=&amp;quot;font-size: 14pt;&amp;quot;&lt;br /&gt;
!width=&amp;quot;50%&amp;quot;|Video &amp;amp; Audio&lt;br /&gt;
!width=&amp;quot;50%&amp;quot;|Glossary &amp;amp; Others&lt;br /&gt;
&lt;br /&gt;
|-valign=&amp;quot;top&amp;quot;&lt;br /&gt;
|width=&amp;quot;50%&amp;quot;|&lt;br /&gt;
* [[Mac Video Playback]]&lt;br /&gt;
* [[Linux Video Playback]]&lt;br /&gt;
* [[Windows Video Playback]]&lt;br /&gt;
* [[Common Playback Problems]] &#039;&#039;(Still needs a ton of work)&#039;&#039;&lt;br /&gt;
* [http://www.cccp-project.net/wiki/index.php?title=Installation_Walkthrough CCCP Installation Walkthrough] (with screencaps)&lt;br /&gt;
&lt;br /&gt;
|width=&amp;quot;50%&amp;quot;|&lt;br /&gt;
* [[BBCode|Guide to BakaBT&#039;s BBCode]]&lt;br /&gt;
* [[Containers|Video/Audio Containers]] &#039;&#039;(Needs work)&#039;&#039;&lt;br /&gt;
* [[Codecs|Video/Audio Codecs]]  &#039;&#039;(Needs information and verification)&#039;&#039;&lt;br /&gt;
* [[Terminology|Glossary of Terms]] &#039;&#039;(Needs work)&#039;&#039;&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
|-style=&amp;quot;font-size: 14pt;&amp;quot;&lt;br /&gt;
!width=&amp;quot;50%&amp;quot;|Other Media&lt;br /&gt;
!width=&amp;quot;50%&amp;quot;|&lt;br /&gt;
&lt;br /&gt;
|-valign=&amp;quot;top&amp;quot;&lt;br /&gt;
|width=&amp;quot;50%&amp;quot;|&lt;br /&gt;
* [[Manga|Viewing Manga]]&lt;br /&gt;
&lt;br /&gt;
|width=&amp;quot;50%&amp;quot;|&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
=To Do List=&lt;br /&gt;
*[[CCCP]] &#039;&#039;(Raw Version)&#039;&#039;&lt;br /&gt;
* What is [[Anime]]?&#039;&#039; (still needs some work)&#039;&#039;&lt;br /&gt;
* [[Manga]] &#039;&#039;(Also needs work)&#039;&#039;&lt;br /&gt;
* [[Keywords]]  (Needs tremendous work)&lt;br /&gt;
* [[DXVA]] (Needs fact checking and styling)&lt;br /&gt;
&lt;br /&gt;
=Staff=&lt;br /&gt;
* [[Staff List]] - List of BakaBT Staff members.&lt;/div&gt;</summary>
		<author><name>JackMasamune</name></author>
	</entry>
	<entry>
		<id>http://wiki.bakabt.me/index.php?title=DXVA&amp;diff=4759</id>
		<title>DXVA</title>
		<link rel="alternate" type="text/html" href="http://wiki.bakabt.me/index.php?title=DXVA&amp;diff=4759"/>
		<updated>2010-07-14T13:37:31Z</updated>

		<summary type="html">&lt;p&gt;JackMasamune: Added tons of content&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;This article is meant to give you a brief explanation of what DXVA is and why it is benificial if you can use it.&lt;br /&gt;
&lt;br /&gt;
==Overview==&lt;br /&gt;
&lt;br /&gt;
DXVA, or DirectX Video Accelleration, is a system built into Windows operating systems since Windows XP that allows programs, if they support it, to offload the decoding of certain media codecs to the GPU. Doing so reduces the strain on the CPU and allows for even High Definition content to be played on a relatively weak system.&lt;br /&gt;
&lt;br /&gt;
==Why offload?==&lt;br /&gt;
&lt;br /&gt;
Media is almost always encoded in one format or another using one codec or another in order to save space. In order to display it to you the program playing it must first decode the file and reassemble the image. The decoding process requires quite intensive calculations and while for small resolutions at low quality a modern CPU can handle it, high resoltion and high quality encodes, such as 1080P with H.264, can require such enormous amount of calculation that even modern CPUs can&#039;t handle it, resulting in image stuttering, artifacts and dropped frames.&lt;br /&gt;
&lt;br /&gt;
Fortunately modern computers usually come equipped with a GPU: Graphics Processing Unit. While normally used for rendering graphics, in essence a GPU is a processor just like your CPU is, only it supports a different and much more limited amount of capabilities. One of the main capabilities however is to do specific calculations greatly parallellised. To compare: a normal CPU nowadays has 2-4 cores that can calculate in parallel, a GPU has hundreds of them. As luck has it, the decoding of media codecs such as H.264 can be parallelised into the calculating abilities of a GPU, allowing the GPU to calculate it. What is a monstrous task for even the best CPU becomes a cakewalk for even the weakest GPU.&lt;br /&gt;
&lt;br /&gt;
This way people that do not have a strong CPU can still view 1080P content.&lt;br /&gt;
&lt;br /&gt;
==DXVA Versions==&lt;br /&gt;
&lt;br /&gt;
DXVA has 2 versions:&lt;br /&gt;
&lt;br /&gt;
*DXVA 1.0: supported in Windows XP and Windows 2000. Allows basic offloading of MPEG2 and standard definition codecs.&lt;br /&gt;
&lt;br /&gt;
*DXVA 2.0: supported in Windows Vista and Windows 7. Allows offloading of much more HD content such as VP-1 and H.264.&lt;br /&gt;
&lt;br /&gt;
==What do I need to use DXVA?==&lt;br /&gt;
&lt;br /&gt;
2 Things: a GPU that allows the calculations to be offloaded to it, and a program that is able to use DXVA.&lt;br /&gt;
&lt;br /&gt;
===Graphics cards===&lt;br /&gt;
Both ATI and nVidia have graphics cards that support offloading, however not all GPUs support the same offload capabilities.&lt;br /&gt;
&lt;br /&gt;
*ATI: called UVD or [https://secure.wikimedia.org/wikipedia/en/wiki/Unified_Video_Decoder Unified Video Decoder]. Supports offloading of H.264/AVC and VC-1. Supported in Radeon HD 2xxx and up. Comes in 3 versions, each with more capabilities. Check the wiki page for details.&lt;br /&gt;
&lt;br /&gt;
*nVidia: called [https://secure.wikimedia.org/wikipedia/en/wiki/Nvidia_PureVideo PureVideo]. Supports offloading of H2.64/AVC and VC-1. Supported from GeForce 6600 onwards. Comes in 4 versions, each with more capabilities. Check the wiki page for details.&lt;br /&gt;
&lt;br /&gt;
===Programs===&lt;br /&gt;
The full list can be found on the Wikipedia page about DXVA (see references).&lt;br /&gt;
&lt;br /&gt;
===&amp;lt;span style=&amp;quot;color:green&amp;quot;&amp;gt;Recommended&amp;lt;/span&amp;gt;===&lt;br /&gt;
Media Player Classic Home Cinema: Supports full H.264 offloading using internal decoders when configured properly. Refer to [[Windows Video Playback]] and [http://forums.bakabt.com/index.php?topic=13746.0 this] guide for more details.&lt;br /&gt;
&lt;br /&gt;
==References==&lt;br /&gt;
*&#039;&#039;&#039;[https://secure.wikimedia.org/wikipedia/en/wiki/DXVA DXVA]&#039;&#039;&#039; from Wikipedia&lt;br /&gt;
*&#039;&#039;&#039;[https://secure.wikimedia.org/wikipedia/en/wiki/Unified_Video_Decoder UVD]&#039;&#039;&#039; from Wikipedia&lt;br /&gt;
*&#039;&#039;&#039;[https://secure.wikimedia.org/wikipedia/en/wiki/Nvidia_PureVideo PureVideo]&#039;&#039;&#039; from Wikipedia&lt;/div&gt;</summary>
		<author><name>JackMasamune</name></author>
	</entry>
	<entry>
		<id>http://wiki.bakabt.me/index.php?title=DXVA&amp;diff=4758</id>
		<title>DXVA</title>
		<link rel="alternate" type="text/html" href="http://wiki.bakabt.me/index.php?title=DXVA&amp;diff=4758"/>
		<updated>2010-07-14T13:05:36Z</updated>

		<summary type="html">&lt;p&gt;JackMasamune: Start of article&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;This article is meant to give you a brief explanation of what DXVA is and why it is benificial if you can use it.&lt;/div&gt;</summary>
		<author><name>JackMasamune</name></author>
	</entry>
	<entry>
		<id>http://wiki.bakabt.me/index.php?title=Codecs&amp;diff=4757</id>
		<title>Codecs</title>
		<link rel="alternate" type="text/html" href="http://wiki.bakabt.me/index.php?title=Codecs&amp;diff=4757"/>
		<updated>2010-07-14T13:04:07Z</updated>

		<summary type="html">&lt;p&gt;JackMasamune: /* Video Codecs */&lt;/p&gt;
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&lt;div&gt;This article is meant as a brief explanation of the most common codecs used on BakaBT and is purely information.  For codec troubleshooting, see the [[Common_Playback_Problems|Common Playback Problems]] BakaBT Wiki article, or visit the [http://forums.BakaBT.com/index.php?board=27.0 Playback Forum] for help playing/installing codecs.&lt;br /&gt;
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==Overview==&lt;br /&gt;
A codec is a device or software that is capable of decoding and/or encoding data, wether it be a digital data stream or signal.  Basically, they are what we use to encode and decode virtually all of the content found on BakaBT.  For the most part, we only worry about the decoding.&lt;br /&gt;
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==Compression==&lt;br /&gt;
Basically, two types of compression exist, &#039;&#039;Lossy&#039;&#039;, and &#039;&#039;Lossles&#039;&#039;.  For example, most of the anime found on BakaBT will use &#039;&#039;Lossy codecs&#039;&#039;, where as several soundtracks use &#039;&#039;Lossless&#039;&#039;.&lt;br /&gt;
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*&#039;&#039;&#039;Lossy codecs&#039;&#039;&#039; - Many of the more popular codecs in the software world are lossy, meaning that they reduce quality by some amount in order to achieve compression. Smaller data sets ease the strain on relatively expensive storage sub-systems such as non-volatile memory and hard disk, as well as write-once-read-many formats such as CD-ROM, DVD and Blu-ray Disc.&lt;br /&gt;
*&#039;&#039;&#039;Lossless codecs&#039;&#039;&#039; - There are also many lossless codecs which are typically used for archiving data in a compressed form while retaining all of the information present in the original stream. If preserving the original quality of the stream is more important than eliminating the correspondingly larger data sizes, lossless codecs are preferred. Especially if the data is to undergo further processing (for example editing) in which case the repeated application of processing (encoding and decoding) on lossy codecs will degrade the quality of the resulting data such that it is readily identifiable (visually, audibly or both). Using more than one codec or encoding scheme successively can also degrade quality significantly. The decreasing cost of storage capacity and network bandwidth has a tendency to reduce the need for lossy codecs for some media.&lt;br /&gt;
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==Video Codecs==&lt;br /&gt;
Currently, many formats exist for video codecs, here are the more common ones found on BakaBT:&lt;br /&gt;
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&amp;lt;!--  Needs some more information  --&amp;gt;&lt;br /&gt;
*&#039;&#039;&#039;MPEG-2&#039;&#039;&#039; - the codec which is used on DVDs and on some Blu-ray/HD-DVD discs.&lt;br /&gt;
*&#039;&#039;&#039;MPEG-4 Part 2&#039;&#039;&#039; - also known as MPEG-4 SP/MPEG-4 ASP. Popular software implemantations are: DivX, Xvid, 3ivx&lt;br /&gt;
*&#039;&#039;&#039;MPEG-4 Part 10&#039;&#039;&#039; - also known as MPEG-4 AVC/H.264. Used on Blu-ray/HD-DVD discs.&lt;br /&gt;
*&#039;&#039;&#039;WMV&#039;&#039;&#039; - codec developed by Microsoft.&lt;br /&gt;
*&#039;&#039;&#039;VC-1&#039;&#039;&#039; - H.264 rival. Used on Blu-ray/HD-DVD discs. Can be offloaded via [[DXVA]] on recent ATI GPUs and the newest nVidia GPUs.&lt;br /&gt;
*&#039;&#039;&#039;x264&#039;&#039;&#039; - free implementation of H.264 standard. Can be offloaded via [[DXVA]] on nVidia and ATI GPUs.&lt;br /&gt;
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==Audio Codecs==&lt;br /&gt;
Several audio formats exist as well, these apply to both movies and music/sounds.  Here are some of the common ones used on BakaBT.   (Coming soon!)&lt;br /&gt;
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&amp;lt;!-- Needs verification  --&amp;gt;&lt;br /&gt;
==Text Codecs==&lt;br /&gt;
Text codecs are used for files that contain softsubs, they are basically text that is rendered during playback separately from the video track instead of being rendered directly to the video file during encoding (hardsubs).  The main advantage of using softsubs being that multiple subtitle/karaoke tracks can be packaged into one file or not used at all during playback.  The main drawback is that it adds more overhead to the file.&lt;br /&gt;
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The softsub file is sometimes a separate file, .sub for example, but is usually inside the [[Containers|container]] file.  Here are the most common codecs used on BakaBT:&lt;br /&gt;
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*&#039;&#039;&#039;SubStation Alpha&#039;&#039;&#039; - Commonly used on BakaBT.  Supports both styled text and metadata.  Has a precision of 10 milliseconds.  Frequently encoded within a [[Containers|container]], thus rarely seen as a separate file.  Uses a .ssa or .ass extension.&lt;br /&gt;
*&#039;&#039;&#039;VobSub&#039;&#039;&#039; - Common on BakaBT as well.  VobSub is image-based so it doesn&#039;t support styled text or metadata.  This is the codec used when the subtitles are ripped directly from the source DVD.  These have a precision of 1 millisecond.&lt;br /&gt;
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* Hardsubs are rendered directly into the video stream so a separate codec isn&#039;t required&lt;br /&gt;
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==References==&lt;br /&gt;
*&#039;&#039;&#039;[http://en.wikipedia.org/wiki/Video_codec Video codec]&#039;&#039;&#039; from Wikipedia&lt;br /&gt;
*&#039;&#039;&#039;[http://en.wikipedia.org/wiki/List_of_codecs#Audio_codecs Audio codecs]&#039;&#039;&#039; from Wikipedia&lt;br /&gt;
*&#039;&#039;&#039;[http://en.wikipedia.org/wiki/Subtitle_(captioning)#Types Subtitle (captioning)]&#039;&#039;&#039; from Wikipedia&lt;/div&gt;</summary>
		<author><name>JackMasamune</name></author>
	</entry>
	<entry>
		<id>http://wiki.bakabt.me/index.php?title=Manga&amp;diff=4756</id>
		<title>Manga</title>
		<link rel="alternate" type="text/html" href="http://wiki.bakabt.me/index.php?title=Manga&amp;diff=4756"/>
		<updated>2010-07-14T12:58:20Z</updated>

		<summary type="html">&lt;p&gt;JackMasamune: &lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;Manga (漫画) is the Japanese word for comic.  In the English speaking world the term refers to any comic of Japanese origin.  (Unaltered) manga is read from right to left, mimicking the order of the current Japanese writing systems. Although many translations and [[Scanlation|scanlations]] flip the images to make manga seem more familier to casual comic fans, this proccess is very unpopular with the majority of manga fans, as it is clearly not &amp;quot;how the artist intended&amp;quot;.&lt;br /&gt;
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==A List of Commonly Used Viewers==&lt;br /&gt;
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===Windows===&lt;br /&gt;
===&amp;lt;span style=&amp;quot;color:green&amp;quot;&amp;gt;Recommended&amp;lt;/span&amp;gt;===&lt;br /&gt;
* [[MangaMeeya]]&lt;br /&gt;
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===&amp;lt;span style=&amp;quot;color:orange&amp;quot;&amp;gt;Acceptable&amp;lt;/span&amp;gt;===&lt;br /&gt;
* Microsoft Office Picture Manager: Supports automatic scaling, can use left and right arrow keys for page scrolling given that the pages are numbered wit the page number at the back of the filename. Comes standard with Office 2003/2007. Probably with 2010 too.&lt;/div&gt;</summary>
		<author><name>JackMasamune</name></author>
	</entry>
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