GStreamer multimedia framework
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Víctor Manuel Jáquez Leal 361f55be31 vaapidecode: decide allocation doesn't update srccaps
The received caps query will bring the already negotiated caps, so they are
not expected to change.

This patch removes this verification which is dead code path.

Signed-off-by: Víctor Manuel Jáquez Leal <victorx.jaquez@intel.com>

https://bugzilla.gnome.org/show_bug.cgi?id=756686
2015-10-20 12:32:44 +02:00
debian.upstream debian: add yasm as build dependency 2015-08-25 18:09:44 +02:00
docs doc: add VA-API reference in freedesktop 2015-06-04 19:14:33 +02:00
ext build: Remove disable-md5 option for libvpx build 2015-10-19 16:05:25 +02:00
gst vaapidecode: decide allocation doesn't update srccaps 2015-10-20 12:32:44 +02:00
gst-libs decoder: h264: initialize PPS's slice_group_id 2015-09-15 19:36:37 +02:00
patches patches/videoparsers: h265parser: more API fences 2015-09-15 19:52:24 +02:00
pkgconfig build: use git.mk 2015-05-18 16:14:46 +02:00
tests tests: Fix compilation while enabling egl as the only renderer in build 2015-07-02 12:37:27 +03:00
.gitmodules Changing source code download links from https://gitorious to https://github 2015-04-04 00:06:56 +03:00
AUTHORS AUTHORS: Updates 2015-02-03 13:08:53 +02:00
autogen.sh autogen: drop videoutils submodule. 2015-04-17 10:44:09 +02:00
configure.ac build: check for patch and fix yasm check 2015-10-19 16:05:25 +02:00
COPYING.LIB Relicense gst-libs/ code to LGPL v2.1+. 2010-09-20 12:55:42 +02:00
git.mk build: use git.mk 2015-05-18 16:14:46 +02:00
Makefile.am build: use git.mk 2015-05-18 16:14:46 +02:00
NEWS NEWS: updates 2015-07-15 15:49:19 +03:00
README README: updates 2015-07-22 12:40:19 +03:00

  gstreamer-vaapi
  VA-API support to GStreamer

  Copyright (C) 2010-2011 Splitted-Desktop Systems
  Copyright (C) 2011-2014 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 JPEG, MPEG-2, MPEG-4:2, H.264 AVC,
    H.264 MVC, VP8, VC-1, WMV3, HEVC videos to VA surfaces, depending
    on the underlying hardware capabilities. This plugin is also able
    to implicitly download the decoded surface to raw YUV buffers.

  * `vaapiencode_<CODEC>' is used to encode into MPEG-2, H.264 AVC,
    H.264 MVC, JPEG, VP8, HEVC videos, depending on the actual value
    of <CODEC> (mpeg2, h264, etc.). 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.


Features
--------

  * VA-API support from 0.29 to 0.38
  * JPEG, MPEG-2, MPEG-4, H.264 AVC, H.264 MVC, VP8, VC-1 and HEVC ad-hoc decoders
  * MPEG-2, H.264 AVC,H.264 MVC, JPEG, VP8 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
------------

Software requirements

  * GStreamer 1.2.x (up to including GStreamer 1.6):
      libglib2.0-dev (>= 2.32)
      libgstreamer1.0-dev (>= 1.2.0)
      libgstreamer-plugins-base1.0-dev (>= 1.2.0)
      libgstreamer-plugins-bad1.0-dev (>= 1.2.0)

  * Renderers:
      DRM: libva-dev (>= 1.1.0), libdrm-dev, libudev-dev
      X11: libva-dev (>= 1.0.1)
      GLX: libva-dev (>= 1.0.3)
      Wayland: libva-dev (>= 1.1.0), libwayland-dev (>= 1.0.2)

Hardware requirements

  * AMD platforms with UVD2 (XvBA supported)
  * Intel Eaglelake (G45)
  * Intel Ironlake, Sandybridge, Ivybridge, Haswell and Broadwell (HD Graphics)
  * Intel BayTrail, Braswell
  * 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 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 ! vaapidecode ! vaapisink fullscreen=true

  * Play a raw MPEG-2 interlaced stream
  $ gst-launch-1.0 -v filesrc location=/path/to/mpeg2.bits ! \
      mpegvideoparse ! vaapidecode ! 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 ! \
      vaapiencode_h264 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:
  <http://www.freedesktop.org/software/vaapi/releases/gstreamer-vaapi/>

  Git repository for work-in-progress changes is available at:
  <https://github.com/01org/gstreamer-vaapi>


Reporting Bugs
--------------

  Bugs can be reported in the GNOME Bugzilla system at:
  <https://bugzilla.gnome.org/enter_bug.cgi?product=gstreamer-vaapi>

  From the main page, new bugs can be reported through New -> Other ->
  gstreamer-vaapi product.