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GStreamer multimedia framework
a192f40ed9
A rendering mode can be "overlay" or "texture"'ed blit. The former mode implies that a VA surface used for rendering can't be re-used right away for decoding, so the sink shall make provisions to retain the associated surface proxy until the next surface is to be displayed. The latter mode implies that the VA surface is implicitly copied to an intermediate backing store, or back buffer of a frame buffer, so the associated surface proxy can be disposed right away. |
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gstreamer-vaapi
VA-API support to GStreamer
Copyright (C) 2010-2011 Splitted-Desktop Systems
Copyright (C) 2011-2012 Intel Corporation
Copyright (C) 2011 Collabora Ltd.
License
-------
gstreamer-vaapi helper libraries and plugin elements are available
under the terms of the GNU Lesser General Public License v2.1+
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.
* `vaapiupload' is used to convert from video/x-raw-yuv pixels to
video/x-vaapi-surface surfaces.
* `vaapidownload' is used to convert from video/x-vaapi-surface
surfaces to video/x-raw-yuv pixels.
* `vaapipostproc' is used to postprocess video/x-vaapi-surface
surfaces, for e.g. deinterlacing.
* `vaapisink' is used to display video/x-vaapi-surface surfaces to
screen.
Features
--------
* VA-API support from 0.29 to 0.32
* MPEG-2, MPEG-4, H.264 and VC-1 ad-hoc decoders
* 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
* libva-dev >= 1.0.3 (VA/GLX)
* libgstreamer0.10-dev >= 0.10.35.1
or with GstBaseSink::query()
* libgstreamer-plugins-base0.10-dev >= 0.10.35
* libgstreamer-plugins-bad0.10-dev >= 0.10.22.1
or with GstVideoContext, GstSurfaceBuffer, codecparsers
If codecparsers-based decoders are not used:
* libavcodec-dev >= 0.6
or with <libavcodec/vaapi.h>
Hardware requirements
* AMD platforms with UVD2 (XvBA supported)
* Intel Eaglelake (G45)
* Intel Ironlake, Sandy Bridge and Ivy Bridge (HD Graphics)
* Intel Poulsbo (US15W)
* Intel Medfield or Cedar Trail
* NVIDIA platforms with PureVideo (VDPAU supported)
Usage
-----
VA elements are automatically plugged into GStreamer pipelines. So,
using playbin2 should work as is. However, here are a few alternate
pipelines constructed manually.
* 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
* Play a raw MPEG-2 interlaced stream
$ gst-launch-0.10 -v filesrc location=/path/to/mpeg2.bits ! \
mpegvideoparse ! vaapidecode ! vaapipostproc ! vaapisink