DXVA - Revision history

Duki: Text replace - "bakabt.com" to "bakabt.me"

2011-08-18T18:45:41Z

Text replace - "bakabt.com" to "bakabt.me"

← Older revision		Revision as of 20:45, 18 August 2011
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	===<span style="color:green">Recommended</span>===		===<span style="color:green">Recommended</span>===
	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.		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.me/index.php?topic=13746.0 this] guide for more details.

	==References==		==References==

JackMasamune: /* Graphics cards */ typo correction

2010-07-19T19:43:48Z

Graphics cards: typo correction

← Older revision		Revision as of 21:43, 19 July 2010
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	*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.		*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.

	*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.		*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.

	===Programs===		===Programs===

JackMasamune: /* References */ Added a link to an extra article explaining things

2010-07-14T15:38:11Z

References: Added a link to an extra article explaining things

← Older revision		Revision as of 17:38, 14 July 2010
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	*'''[https://secure.wikimedia.org/wikipedia/en/wiki/Unified_Video_Decoder UVD]''' from Wikipedia		*'''[https://secure.wikimedia.org/wikipedia/en/wiki/Unified_Video_Decoder UVD]''' from Wikipedia
	*'''[https://secure.wikimedia.org/wikipedia/en/wiki/Nvidia_PureVideo PureVideo]''' from Wikipedia		*'''[https://secure.wikimedia.org/wikipedia/en/wiki/Nvidia_PureVideo PureVideo]''' from Wikipedia
			*'''[http://www.guru3d.com/article/accelerate-x264-1080p-movies-over-the-gpu-guide/1 Accelerate x.264 1080p movies over the GPU guide]''' from Guru3D

JackMasamune: Added tons of content

2010-07-14T13:37:31Z

Added tons of content

← Older revision		Revision as of 15:37, 14 July 2010
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	This article is meant to give you a brief explanation of what DXVA is and why it is benificial if you can use it.		This article is meant to give you a brief explanation of what DXVA is and why it is benificial if you can use it.

			==Overview==

			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.

			==Why offload?==

			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't handle it, resulting in image stuttering, artifacts and dropped frames.

			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.

			This way people that do not have a strong CPU can still view 1080P content.

			==DXVA Versions==

			DXVA has 2 versions:

			*DXVA 1.0: supported in Windows XP and Windows 2000. Allows basic offloading of MPEG2 and standard definition codecs.

			*DXVA 2.0: supported in Windows Vista and Windows 7. Allows offloading of much more HD content such as VP-1 and H.264.

			==What do I need to use DXVA?==

			2 Things: a GPU that allows the calculations to be offloaded to it, and a program that is able to use DXVA.

			===Graphics cards===
			Both ATI and nVidia have graphics cards that support offloading, however not all GPUs support the same offload capabilities.

			*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.

			*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.

			===Programs===
			The full list can be found on the Wikipedia page about DXVA (see references).

			===<span style="color:green">Recommended</span>===
			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.

			==References==
			*'''[https://secure.wikimedia.org/wikipedia/en/wiki/DXVA DXVA]''' from Wikipedia
			*'''[https://secure.wikimedia.org/wikipedia/en/wiki/Unified_Video_Decoder UVD]''' from Wikipedia
			*'''[https://secure.wikimedia.org/wikipedia/en/wiki/Nvidia_PureVideo PureVideo]''' from Wikipedia

JackMasamune: Start of article

2010-07-14T13:05:36Z

Start of article

New page

This article is meant to give you a brief explanation of what DXVA is and why it is benificial if you can use it.