Beyond Linux® From Scratch (systemd 版) - Version 2021-01-14

第42章 マルチメディアライブラリとドライバー

libmpeg2-0.5.1

Introduction to libmpeg2

The libmpeg2 package contains a library for decoding MPEG-2 and MPEG-1 video streams. The library is able to decode all MPEG streams that conform to certain restrictions: 「constrained parameters」 for MPEG-1, and 「main profile」 for MPEG-2. This is useful for programs and applications needing to decode MPEG-2 and MPEG-1 video streams.

本パッケージは LFS-10.0 において正しくビルドでき動作することが確認されています。

Package Information

libmpeg2 Dependencies

Optional

X ウィンドウシステム and SDL-1.2.15

User Notes: http://wiki.linuxfromscratch.org/blfs/wiki/libmpeg2

Installation of libmpeg2

Install libmpeg2 by running the following commands: 

sed -i 's/static const/static/' libmpeg2/idct_mmx.c &&

./configure --prefix=/usr    \
            --enable-shared  \
            --disable-static &&
make

To test the results, issue: make check. To perform a more comprehensive regression test, see the file test/README in the source tree.

Now, as the root user: 

make install &&

install -v -m755 -d /usr/share/doc/mpeg2dec-0.5.1 &&
install -v -m644 README doc/libmpeg2.txt \
                    /usr/share/doc/mpeg2dec-0.5.1

Command Explanations

sed -i ...: This sed fixes problems with recent GCC compilers.

--disable-static: このスイッチはスタティックライブラリをインストールしないようにします。

Contents

Installed Programs: corrupt_mpeg2, extract_mpeg2 and mpeg2dec
Installed Libraries: libmpeg2.so and libmpeg2convert.so
Installed Directories: /usr/include/mpeg2dec and /usr/share/doc/mpeg2dec-0.5.1

Short Descriptions

extract_mpeg2

extracts MPEG video streams from a multiplexed stream.

mpeg2dec

decodes MPEG1 and MPEG2 video streams.

libmpeg2.so

contains API functions used to decode MPEG video streams.

libmpeg2convert.so

contains API functions used for color conversions of MPEG video streams.

最終更新日： 2020-08-20 04:37:56 +0900