This document is deprecated. See vaapi.md instead.
Hardware acceleration of video decode on Linux is unsupported in Chrome for user-facing builds. During development (targeting other platforms) it can be useful to be able to trigger the code-paths used on HW-accelerated platforms (such as CrOS and win7) in a linux-based development environment. Here's one way to do so, with details based on a gprecise setup.
Install pre-requisites: On Ubuntu Precise, at least, this includes:
sudo apt-get install libtool libvdpau1 libvdpau-dev
Install and configure libva
DEST=${HOME}/apps/libva cd /tmp git clone git://anongit.freedesktop.org/libva cd libva git reset --hard libva-1.2.1 ./autogen.sh && ./configure --prefix=${DEST} make -j32 && make install
Install and configure the VDPAU VAAPI driver
DEST=${HOME}/apps/libva cd /tmp git clone git://anongit.freedesktop.org/vaapi/vdpau-driver cd vdpau-driver export PKG_CONFIG_PATH=${DEST}/lib/pkgconfig/:$PKG_CONFIG_PATH export LIBVA_DRIVERS_PATH=${DEST}/lib/dri export LIBVA_X11_DEPS_CFLAGS=-I${DEST}/include export LIBVA_X11_DEPS_LIBS=-L${DEST}/lib export LIBVA_DEPS_CFLAGS=-I${DEST}/include export LIBVA_DEPS_LIBS=-L${DEST}/lib make distclean unset CC CXX ./autogen.sh && ./configure --prefix=${DEST} --enable-debug find . -name Makefile |xargs sed -i 'sI/usr/lib/xorg/modules/driversI${DEST}/lib/driIg' sed -i -e 's/_(\(VAEncH264VUIBufferType\|VAEncH264SEIBufferType\));//' src/vdpau_dump.c make -j32 && rm -f ${DEST}/lib/dri/{nvidia_drv_video.so,s3g_drv_video.so} && make install
Add to args.gn:
target_os = "chromeos"
to link in VaapiVideoDecodeAccelerator
proprietary_codecs = true
and ffmpeg_branding = "Chrome"
to allow Chrome to play h.264 content, which is the only codec VAVDA knows about today.Rebuild chrome
Run chrome with LD_LIBRARY_PATH=${HOME}/apps/libva/lib
in the environment, and with the --no-sandbox
command line flag.
If things don‘t work, a Debug build (to include D*LOG’s) with --vmodule=*content/common/gpu/media/*=10,gpu_video*=1
might be enlightening.
** note NOTE THIS IS AN UNSUPPORTED CONFIGURATION AND LIKELY TO BE BROKEN AT ANY POINT IN TIME **
This page is purely here to help developers targeting supported HW <video>
decode platforms be more effective. Do not expect help if this setup fails to work.