gstreamer-vaapi
  VA-API support to GStreamer

  Copyright (C) 2010 Splitted-Desktop Systems


License
-------

gstreamer-vaapi helper libraries are available under the terms of the
GNU Lesser General Public License v2.1+.

gstreamer-vaapi plugin elements are available under the terms of the
GNU General Public License v2+.


Overview
--------

gstreamer-vaapi consists in a collection of VA-API based plugins for
GStreamer and helper libraries.

  * `vaapidecode' is used to decode MPEG-2, MPEG-4, H.264, VC-1, WMV3
    videos to video/x-vaapi-surfaces surfaces, depending on the
    underlying HW capabilities.

  * `vaapiconvert' is used to convert from video/x-raw-yuv pixels to
    video/x-vaapi-surface surfaces.

  * `vaapisink' is used to display video/x-vaapi-surface surfaces to
    screen.


Features
--------

  * VA-API support from 0.29 to 0.31
  * OpenGL rendering through VA/GLX or GLX texture-from-pixmap + FBO
  * Support for major HW video decoding solutions on Linux (AMD, Intel, NVIDIA)


Requirements
------------

Software requirements

  * libgstreamer0.10-dev >= 0.10.0
  * libgstreamer-plugins-base0.10-dev >= 0.10.16
  * libva-dev >= 0.31.0-1+sds9 (VA/GLX)
  * libavcodec-dev >= 0.6 or with <libavcodec/vaapi.h>

Hardware requirements

  * AMD platforms with UVD2 (XvBA supported)
  * Intel Poulsbo (US15W)
  * Intel Eaglelake (G45)
  * Intel Ironlake (HD Graphics)
  * NVIDIA platforms with PureVideo (VDPAU supported)


Usage
-----

The GStreamer pipeline currently has to be built manually.
i.e. neither decodebin{,2} nor playbin{,2} would select the VA-API
elements automatically.

  * Play an H.264 video with an MP4 container in fullscreen mode
  $ gst-launch-0.10 -v filesrc location=/path/to/video.mp4 ! \
      qtdemux ! vaapidecode ! vaapisink fullscreen=true


Caveats
-------

  * No ad-hoc parser, vaapidecoder currently relies on FFmpeg
  * MPEG-4 Part-2 (DivX) has decoding bugs