gstreamer-vaapi
 VA-API support to GStreamer
 Copyright (C) 2010-2011 Splitted-Desktop Systems
 Copyright (C) 2011-2020 Intel Corporation
 Copyright (C) 2011 Collabora Ltd.
 Copyright (C) 2015-2020 Igalia, S.L.
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.
 * `vaapi<CODEC>dec' is used to decode JPEG, MPEG-2, MPEG-4:2, H.264
 AVC, H.264 MVC, VP8, VP9, VC-1, WMV3, HEVC videos to VA surfaces,
 depending on the actual value of <CODEC> and the underlying
 hardware capabilities. This plugin is also able to implicitly
 download the decoded surface to raw YUV buffers.
 * `vaapi<CODEC>enc' is used to encode into MPEG-2, H.264 AVC, H.264
 MVC, JPEG, VP8, VP9, HEVC videos, depending on the actual value of
 <CODEC> (mpeg2, h264, etc.) and the hardware capabilities. By
 default, raw format bitstreams are generated, so the result may be
 piped to a muxer, e.g. qtmux for MP4 containers.
 * `vaapipostproc' is used to filter VA surfaces, for e.g. scaling,
 deinterlacing (bob, motion-adaptive, motion-compensated), noise
 reduction or sharpening. This plugin is also used to upload raw
 YUV pixels into VA surfaces.
 * `vaapisink' is used to render VA surfaces to an X11 or Wayland
 display. This plugin also features a "headless" mode (DRM) more
 suited to remote transcode scenarios, with faster throughput.
 * `vaapioverlay` is a accelerated compositor that blends or
 composite different video streams.
Features
--------
 * VA-API support from 0.39
 * JPEG, MPEG-2, MPEG-4, H.264 AVC, H.264 MVC, VP8, VC-1, HEVC and
 VP9 ad-hoc decoders
 * MPEG-2, H.264 AVC,H.264 MVC, JPEG, VP8, VP9 and HEVC ad-hoc
 encoders
 * OpenGL rendering through VA/GLX or GLX texture-from-pixmap + FBO
 * Support for EGL backend
 * Support for the Wayland display server
 * Support for headless decode pipelines with VA/DRM
 * Support for major HW video decoding solutions on Linux (AMD,
 Intel, NVIDIA)
 * Support for HW video encoding on Intel HD Graphics hardware
 * Support for VA Video Processing APIs (VA/VPP)
 - Scaling and color conversion
 - Image enhancement filters: Sharpening, Noise Reductio, Color
 Balance, Skin-Tone-Enhancement
 - Advanced deinterlacing: Motion-Adaptive, Motion-Compensated
Requirements
------------
Hardware requirements
 * Hardware supported by i965 driver or iHD, such as
 - Intel Ironlake, Sandybridge, Ivybridge, Haswell, Broadwell,
 Skylake, etc. (HD Graphics)
 - Intel BayTrail, Braswell
 - Intel Poulsbo (US15W)
 - Intel Medfield or Cedar Trail
 * Hardware supported by AMD Radeonsi driver, such as the list below
 - AMD Carrizo, Bristol Ridge, Raven Ridge, Picasso, Renoir
 - AMD Tonga, Fiji, Polaris XX, Vega XX, Navi 1X
 * Other hardware supported by Mesa VA gallium state-tracker
Usage
-----
 VA elements are automatically plugged into GStreamer pipelines. So,
 using playbin should work as is.
 However, here are a few alternate pipelines that could be manually
 constructed.
 * Play an H.264 video with an MP4 container in fullscreen mode
 $ gst-launch-1.0 -v filesrc location=/path/to/video.mp4 ! \
 qtdemux ! vaapidecodebin ! vaapisink fullscreen=true
 * Play a raw MPEG-2 interlaced stream
 $ gst-launch-1.0 -v filesrc location=/path/to/mpeg2.bits ! \
 mpegvideoparse ! vaapimpeg2dec ! vaapipostproc ! vaapisink
 * Convert from one pixel format to another, while also downscaling
 $ gst-launch-1.0 -v filesrc location=/path/to/raw_video.yuv ! \
 videoparse format=yuy2 width=1280 height=720 ! \
 vaapipostproc format=nv12 height=480 ! vaapisink
 * Encode a 1080p stream in raw I420 format into H.264
 $ gst-launch-1.0 -v filesrc location=/path/to/raw_video.yuv ! \
 videoparse format=i420 width=1920 height=1080 framerate=30/1 ! \
 vaapih264enc rate-control=cbr tune=high-compression ! \
 qtmux ! filesink location=/path/to/encoded_video.mp4
Sources
-------
 gstreamer-vaapi is Open Source software, so updates to this
 framework are really easy to get.
 Stable source code releases can be found at:
 <https://gstreamer.freedesktop.org/src/gstreamer-vaapi/>
 GitLab repository for work-in-progress changes is available at:
 <https://gitlab.freedesktop.org/gstreamer/gstreamer-vaapi>
Reporting Bugs
--------------
 Bugs can be reported in the GStreamer's GitLab system at:
 <https://gitlab.freedesktop.org/gstreamer/gstreamer-vaapi/issues>