Beyond Linux® From Scratch （systemd 版） - 版本 g1798b28

第 42 章 Multimedia Libraries and Drivers

libaom-3.14.1

Introduction to libaom

The libaom package contains a reference version of the Alliance for Open Media video codec. This codec is a patent free alternative to H.265, and is starting to be used throughout the internet.

[注意]

注意

Development versions of BLFS may not build or run some packages properly if LFS or dependencies have been updated since the most recent stable versions of the books.

Package Information

libaom Dependencies

Recommended

yasm-1.3.0 (or NASM-3.02)

Optional

Doxygen-1.17.0

Installation of libaom

Prevent installing static versions of the libraries: 

sed -i 's/aom aom_static/aom/' cmake/aom_install.cmake

Install libaom by running the following commands: 

mkdir aom-build &&
cd    aom-build &&

cmake -D CMAKE_INSTALL_PREFIX=/usr \
      -D CMAKE_BUILD_TYPE=Release  \
      -D BUILD_SHARED_LIBS=1       \
      -D ENABLE_DOCS=no            \
      -G Ninja .. &&
ninja

This package does not come with a working test suite.

Now, as the root user: 

ninja install

Command Explanations

-D BUILD_SHARED_LIBS=1: This switch builds shared versions of the libraries.

-D ENABLE_DOCS=no: This switch disables building the documentation because it fails due to an incompatibility with the latest version of Doxygen-1.17.0.

-D ENABLE_NASM=yes: Use this switch if you have both yasm-1.3.0 and NASM-3.02 installed and wish to use nasm instead of yasm.

Contents

Installed Programs: aomdec and aomenc
Installed Libraries: libaom.so
Installed Directories: /usr/include/aom

Short Descriptions

aomdec

provides various decoders supported by this package, including one for AV1

aomenc

provides various encoders supported by this package, including one for AV1

libaom.so

contains functions that provide a reference implementation of the AV1 codec