134 lines
4.6 KiB
Plaintext
134 lines
4.6 KiB
Plaintext
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gstreamer-vaapi
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VA-API support to GStreamer
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Copyright (C) 2010-2011 Splitted-Desktop Systems
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Copyright (C) 2011-2020 Intel Corporation
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Copyright (C) 2011 Collabora Ltd.
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Copyright (C) 2015-2020 Igalia, S.L.
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License
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-------
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gstreamer-vaapi helper libraries and plugin elements are available
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under the terms of the GNU Lesser General Public License v2.1+
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Overview
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--------
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gstreamer-vaapi consists in a collection of VA-API based plugins for
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GStreamer and helper libraries.
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* `vaapi<CODEC>dec' is used to decode JPEG, MPEG-2, MPEG-4:2, H.264
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AVC, H.264 MVC, VP8, VP9, VC-1, WMV3, HEVC videos to VA surfaces,
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depending on the actual value of <CODEC> and the underlying
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hardware capabilities. This plugin is also able to implicitly
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download the decoded surface to raw YUV buffers.
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* `vaapi<CODEC>enc' is used to encode into MPEG-2, H.264 AVC, H.264
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MVC, JPEG, VP8, VP9, HEVC videos, depending on the actual value of
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<CODEC> (mpeg2, h264, etc.) and the hardware capabilities. By
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default, raw format bitstreams are generated, so the result may be
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piped to a muxer, e.g. qtmux for MP4 containers.
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* `vaapipostproc' is used to filter VA surfaces, for e.g. scaling,
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deinterlacing (bob, motion-adaptive, motion-compensated), noise
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reduction or sharpening. This plugin is also used to upload raw
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YUV pixels into VA surfaces.
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* `vaapisink' is used to render VA surfaces to an X11 or Wayland
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display. This plugin also features a "headless" mode (DRM) more
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suited to remote transcode scenarios, with faster throughput.
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* `vaapioverlay` is a accelerated compositor that blends or
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composite different video streams.
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Features
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--------
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* VA-API support from 0.39
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* JPEG, MPEG-2, MPEG-4, H.264 AVC, H.264 MVC, VP8, VC-1, HEVC and
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VP9 ad-hoc decoders
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* MPEG-2, H.264 AVC,H.264 MVC, JPEG, VP8, VP9 and HEVC ad-hoc
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encoders
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* OpenGL rendering through VA/GLX or GLX texture-from-pixmap + FBO
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* Support for EGL backend
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* Support for the Wayland display server
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* Support for headless decode pipelines with VA/DRM
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* Support for major HW video decoding solutions on Linux (AMD,
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Intel, NVIDIA)
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* Support for HW video encoding on Intel HD Graphics hardware
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* Support for VA Video Processing APIs (VA/VPP)
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- Scaling and color conversion
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- Image enhancement filters: Sharpening, Noise Reductio, Color
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Balance, Skin-Tone-Enhancement
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- Advanced deinterlacing: Motion-Adaptive, Motion-Compensated
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Requirements
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------------
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Hardware requirements
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* Hardware supported by i965 driver or iHD, such as
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- Intel Ironlake, Sandybridge, Ivybridge, Haswell, Broadwell,
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Skylake, etc. (HD Graphics)
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- Intel BayTrail, Braswell
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- Intel Poulsbo (US15W)
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- Intel Medfield or Cedar Trail
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* Hardware supported by AMD Radeonsi driver, such as the list below
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- AMD Carrizo, Bristol Ridge, Raven Ridge, Picasso, Renoir
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- AMD Tonga, Fiji, Polaris XX, Vega XX, Navi 1X
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* Other hardware supported by Mesa VA gallium state-tracker
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Usage
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-----
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VA elements are automatically plugged into GStreamer pipelines. So,
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using playbin should work as is.
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However, here are a few alternate pipelines that could be manually
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constructed.
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* Play an H.264 video with an MP4 container in fullscreen mode
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$ gst-launch-1.0 -v filesrc location=/path/to/video.mp4 ! \
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qtdemux ! vaapidecodebin ! vaapisink fullscreen=true
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* Play a raw MPEG-2 interlaced stream
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$ gst-launch-1.0 -v filesrc location=/path/to/mpeg2.bits ! \
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mpegvideoparse ! vaapimpeg2dec ! vaapipostproc ! vaapisink
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* Convert from one pixel format to another, while also downscaling
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$ gst-launch-1.0 -v filesrc location=/path/to/raw_video.yuv ! \
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videoparse format=yuy2 width=1280 height=720 ! \
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vaapipostproc format=nv12 height=480 ! vaapisink
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* Encode a 1080p stream in raw I420 format into H.264
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$ gst-launch-1.0 -v filesrc location=/path/to/raw_video.yuv ! \
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videoparse format=i420 width=1920 height=1080 framerate=30/1 ! \
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vaapih264enc rate-control=cbr tune=high-compression ! \
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qtmux ! filesink location=/path/to/encoded_video.mp4
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Sources
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-------
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gstreamer-vaapi is Open Source software, so updates to this
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framework are really easy to get.
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Stable source code releases can be found at:
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<https://gstreamer.freedesktop.org/src/gstreamer-vaapi/>
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GitLab repository for work-in-progress changes is available at:
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<https://gitlab.freedesktop.org/gstreamer/gstreamer-vaapi>
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Reporting Bugs
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--------------
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Bugs can be reported in the GStreamer's GitLab system at:
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<https://gitlab.freedesktop.org/gstreamer/gstreamer-vaapi/issues>
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