gstreamer/subprojects/gstreamer-vaapi
Víctor Manuel Jáquez Leal 74b3e07616 vaapi: plugin: Handle when no encoders/decoders available.
Nouveau driver currently only exposes postproc entry. But
vaapidecodebin is registered independent if there are decoders or not,
exposing a segmentation fault.

This patch removes the encoder/decoder/codec arrays if no entries are
found, and if no decoders are found vaapidecodebin is not
registered. Also for vaapipostproc if no postproc entry is found.

Also, if general decoder, used by vaapidecodebin, doesn't have a sink
pad string, don't register the glib type.

Fixes: #1349
Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2906>
2022-08-17 12:58:24 +01:00
..
docs vaapi: fix up package-origin in meson_options.txt 2022-04-21 10:54:50 +01:00
gst vaapi: plugin: Handle when no encoders/decoders available. 2022-08-17 12:58:24 +01:00
gst-libs vaapi: plugin: Handle when no encoders/decoders available. 2022-08-17 12:58:24 +01:00
scripts Move files from gstreamer-vaapi into the "subprojects/gstreamer-vaapi/" subdir 2021-09-24 16:14:54 -03:00
tests meson: update for meson.build_root() and .build_source() deprecation 2021-10-20 11:20:44 +00:00
.gitignore Move files from gstreamer-vaapi into the "subprojects/gstreamer-vaapi/" subdir 2021-09-24 16:14:54 -03:00
AUTHORS Move files from gstreamer-vaapi into the "subprojects/gstreamer-vaapi/" subdir 2021-09-24 16:14:54 -03:00
ChangeLog Release 1.20.3 2022-06-15 23:36:22 +01:00
COPYING.LIB Move files from gstreamer-vaapi into the "subprojects/gstreamer-vaapi/" subdir 2021-09-24 16:14:54 -03:00
gstreamer-vaapi.doap Release 1.20.3 2022-06-15 23:36:22 +01:00
meson.build Back to development 2022-06-16 00:59:00 +01:00
meson_options.txt vaapi: fix up package-origin in meson_options.txt 2022-04-21 10:54:50 +01:00
NEWS Release 1.20.3 2022-06-15 23:36:22 +01:00
README Move files from gstreamer-vaapi into the "subprojects/gstreamer-vaapi/" subdir 2021-09-24 16:14:54 -03:00
RELEASE Release 1.20.3 2022-06-15 23:36:22 +01:00

  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>