1 # Enabling hardware <video> decode codepaths on linux
3 Hardware acceleration of video decode on Linux is
4 [unsupported](https://crbug.com/137247) in Chrome for user-facing builds. During
5 development (targeting other platforms) it can be useful to be able to trigger
6 the code-paths used on HW-accelerated platforms (such as CrOS and win7) in a
7 linux-based development environment. Here's one way to do so, with details based
10 * Install pre-requisites: On Ubuntu Precise, at least, this includes:
13 sudo apt-get install libtool libvdpau1 libvdpau-dev
16 * Install and configure [libva](http://cgit.freedesktop.org/libva/)
19 DEST=${HOME}/apps/libva
21 git clone git://anongit.freedesktop.org/libva
23 git reset --hard libva-1.2.1
24 ./autogen.sh && ./configure --prefix=${DEST}
25 make -j32 && make install
28 * Install and configure the
29 [VDPAU](http://cgit.freedesktop.org/vaapi/vdpau-driver) VAAPI driver
32 DEST=${HOME}/apps/libva
34 git clone git://anongit.freedesktop.org/vaapi/vdpau-driver
36 export PKG_CONFIG_PATH=${DEST}/lib/pkgconfig/:$PKG_CONFIG_PATH
37 export LIBVA_DRIVERS_PATH=${DEST}/lib/dri
38 export LIBVA_X11_DEPS_CFLAGS=-I${DEST}/include
39 export LIBVA_X11_DEPS_LIBS=-L${DEST}/lib
40 export LIBVA_DEPS_CFLAGS=-I${DEST}/include
41 export LIBVA_DEPS_LIBS=-L${DEST}/lib
44 ./autogen.sh && ./configure --prefix=${DEST} --enable-debug
45 find . -name Makefile |xargs sed -i 'sI/usr/lib/xorg/modules/driversI${DEST}/lib/driIg'
46 sed -i -e 's/_(\(VAEncH264VUIBufferType\|VAEncH264SEIBufferType\));//' src/vdpau_dump.c
47 make -j32 && rm -f ${DEST}/lib/dri/{nvidia_drv_video.so,s3g_drv_video.so} && make install
50 * Add to `$GYP_DEFINES`:
51 * `chromeos=1` to link in `VaapiVideoDecodeAccelerator`
52 * `proprietary_codecs=1 ffmpeg_branding=Chrome` to allow Chrome to play
53 h.264 content, which is the only codec VAVDA knows about today.
54 * Re-run gyp (`./build/gyp_chromium` or `gclient runhooks`)
56 * Run chrome with `LD_LIBRARY_PATH=${HOME}/apps/libva/lib` in the environment,
57 and with the `--no-sandbox` command line flag.
58 * If things don't work, a Debug build (to include D\*LOG's) with
59 `--vmodule=*content/common/gpu/media/*=10,gpu_video*=1` might be
63 NOTE THIS IS AN UNSUPPORTED CONFIGURATION AND LIKELY TO BE BROKEN AT ANY
67 This page is purely here to help developers targeting supported HW `<video>`
68 decode platforms be more effective. Do not expect help if this setup fails to