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X-Video Bitstream Acceleration: Wikis


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X-Video Bitstream Acceleration (XvBA), designed by AMD for its ATI Radeon GPU, is a future extension of the X video extension (Xv) for the X Window System on Linux operating-systems[1]. XvBA API allows video programs to offload portions of the video decoding process to the GPU video-hardware. Currently, the portions designed to be offloaded by XvBA onto the GPU are motion compensation (mo comp) and inverse discrete cosine transform (iDCT), and VLD (Variable-Length Decoding) for MPEG-2, MPEG-4 AVC (H.264) and VC-1 encoded video.

XvBA is a Linux equivalent of Microsoft's DirectX Video Acceleration (DxVA) API for Windows[1] and a competitor to NVIDIA's Video Decode and Presentation API for Unix (VDPAU)[2].

In November 2009 a backend for Video Acceleration API (VA API) was released for XvBA[3] which means any software that supports VA API will also support XvBA.[2]


Device drivers

Each hardware video GPU capable of XvBA video acceleration requires a X11 software device driver to enable these features. Currently only AMD's ATI Radeon graphics cards hardware that has support for Unified Video Decoder version 2.0 or later (primarily the Radeon HD 4000 series) are supported by the proprietary ATI Catalyst device driver.[4][5][6]

See also


External links



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