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FFmpeg軟體只是個解碼編碼軟體，如果支援多種格式必須先安裝好對應的庫，下面就說下我裝的庫：
1. 安裝faad2
# wget http://downloads.sourceforge.net/faac/faad2-2.6.1.tar.gz
# tar xvfz faad2-2.6.1.tar.gz
# cd faad2
# ./bootstrap
# ./configure
# make
# make install
2. 安裝liba52
# wget http://liba52.sourceforge.net/files/a52dec-0.7.4.tar.gz
# tar xvfz a52dec-0.7.4.tar.gz
# cd a52dec-0.7.4
# ./configure
# make
# make install
3. 安裝libdirac
# wget http://downloads.sourceforge.net/dirac/dirac-0.10.0.tar.gz
# tar xvfz dirac-0.10.0.tar.gz
# cd dirac-0.10.0
# ./configure
# make
# make install
4. 安裝faac2
# wget http://downloads.sourceforge.net/faac/faac-1.26.tar.gz
# tar xvfz faac-1.26.tar.gz
# cd faac
# ./bootstrap
# ./configure
# make
# make install
5. 安裝libamrnb
# wget http://ftp.penguin.cz/pub/users/utx/amr/amrnb-7.0.0.2.tar.bz2
# tar xvfj amrnb-7.0.0.2.tar.bz2
# cd amrnb-7.0.0.2
# ./configure
# make
# make install
6. 安裝libamrwb
# wget http://ftp.penguin.cz/pub/users/utx/amr/amrwb-7.0.0.3.tar.bz2
# tar xvfj amrwb-7.0.0.3.tar.bz2
# cd amrwb-7.0.0.3
# ./configure
# make
# make install
7. 安裝libmp3lame
# wget http://downloads.sourceforge.net/lame/lame-3.97.tar.gz
# tar xzf lame-3.97.tar.gz
# cd lame-3.97
# ./configure
# make
# make install
8. 安裝libx264
此軟體包需要用git來擷取，所以要先安裝git:
# wget http://kernel.org/pub/software/scm/git/git-1.6.2.tar.gz (地址要確認)
# tar zxvf git-1.6.2.tar.gz
# cd git-1.6.2
# ./configure
# make
# make install
然後安裝libx264
# /usr/local/bin/git clone git://git.videolan.org/x264.git x264
# cd x264
# ./configure --enable-pthread --enable-shared --disable-asm
# make
# make install
8. 安裝libnut，該軟體需要用svn擷取原始碼，svn可以直接用yum install svn來裝。先下載:
# svn co svn://svn.mplayerhq.hu/nut/src/trunk libnut
下載後代碼儲存在建立立的libnut目錄下，對於64位Linux需要修改設定檔:
# cd libnut
# vi config.mak
在最後一個CFLAGS下一行增加:
CFLAGS += -fPIC
然後編譯安裝:
# make
# make install
9. 安裝libogg
# wget http://downloads.xiph.org/releases/ogg/libogg-1.1.3.tar.gz
# tar xvf libogg-1.1.3.tar.gz
# cd libogg-1.1.3
# ./configure
# make
# make install
10. 安裝libtheora (svn擷取)
# svn co http://svn.xiph.org/trunk/theora theora
# cd theora
# ./autogen.sh
# ./configure
# make
# make install
11. 安裝libvorbis
# wget http://downloads.xiph.org/releases/vorbis/libvorbis-1.2.0.tar.gz
# tar xvfz libvorbis-1.2.0.tar.gz
# cd libvorbis-1.2.0
# ./configure
# make
# make install
12. 安裝libxvid
# wget http://downloads.xvid.org/downloads/xvidcore-1.2.1.tar.gz
# tar xvf xvidcore-1.2.1.tar.gz
# cd xvidcore-1.2.1/build/generic
# ./bootstrap.sh
# ./configure --disable-assembly
# make
# make install
上面的媒體支援庫安裝完後，可以設定下環境準備編譯FFmpeg了！
13. 修改環境變數
# vi /etc/ld.so.conf
在檔案末增加一行:
/usr/local/lib
然後生效之:
# ldconfig
14. 安裝FFmpeg
可以通過svn擷取，不過檔案比較大，所以特別慢:
# svn checkout svn://svn.mplayerhq.hu/ffmpeg/trunk ffmpeg
# cd ffmpeg
也可以自己下載:
# http://www.ffmpeg.org/releases/ffmpeg-0.5.tar.bz2
# bzip2 -d ffmpeg-0.5.tar.bz2
# tar -xf ffmpeg-0.5.tar
# cd ffmpeg-0.5
編譯(64位系統需要設定PKG_CONFIG_PATH參數):
# export PKG_CONFIG_PATH=/usr/local/lib/pkgconfig CFLAGS="-fPIC -m64"
# ./configure --enable-shared \
--enable-gpl \
--enable-nonfree \
--enable-postproc \
--enable-avfilter \
--enable-avfilter-lavf \
--enable-pthreads \
--enable-libamr-nb \
--enable-libamr-wb \
--enable-libdirac \
--enable-libfaac \
--enable-libfaad \
--enable-libfaadbin \
--enable-libmp3lame \
--enable-libnut \
--enable-libtheora \
--enable-libvorbis \
--enable-libx264 \
--enable-libxvid \
--enable-decoder=libx264 \
--enable-encoder=libx264
# make
# make install
14. 可能出現的錯誤:
/usr/include/linux/videodev.h:56: error: syntax error before "ulong"
/usr/include/linux/videodev.h:72: error: syntax error before ‘}‘ token
libavdevice/v4l.c: In function `grab_read_header‘:
libavdevice/v4l.c:75: error: storage size of ‘tuner‘ isn‘t known
libavdevice/v4l.c:133: error: invalid application of `sizeof‘ to incomplete type `video_tuner‘
libavdevice/v4l.c:140: error: invalid application of `sizeof‘ to incomplete type `video_tuner‘
libavdevice/v4l.c:75: warning: unused variable `tuner‘
這可能是原始碼videodev.h不是針對次版本Linux寫的，標準C沒有ulong類型，所以要改成unsigned long
15. 運行ffmpeg -formats，可能出的錯誤:
ffmpeg: error while loading shared libraries: libavfilter.so.0: cannot open shared object file: No such file or directory
這事沒有設定環境路徑造成了，增加一個ffmpeg.conf設定檔:
# cd /etc/ld.so.conf.d
# vi ffmpeg.conf
在檔案內寫上:
/usr/local/lib
然後確認生效:
# ldconfig
16. 其他:
本文中沒有提到libgsm的安裝，請參考下面的資料。
