Beyond Linux® From Scratch (systemd Edition) - Version 12.4

Chapter 42. Multimedia Libraries and Drivers

libaom-3.12.1

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.

This package is known to build and work properly using an LFS 12.4 platform.

Package Information

libaom Dependencies

Recommended

yasm-1.3.0 (or NASM-2.16.03)

Optional

Doxygen-1.14.0

[Note]

Note

An Internet connection is needed for some tests of this package. The system certificate store may need to be set up with make-ca-1.16.1 before testing this package.

Installation of libaom

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

To test the results, issue: ninja testdata && ninja runtests. Note that the tests take an extremely long time to run.

Now, as the root user: 

ninja install &&
rm -v /usr/lib/libaom.a

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-1.14.0.

-D ENABLE_NASM=yes: Use this switch if you have both yasm-1.3.0 and NASM-2.16.03 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

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

aomenc

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

libaom.so

contains functions that provide a reference implementation of the AV1 codec