ubuntu完整编译安装ffmpeg,成功通过opencv+ffmpeg编译

ubuntu14下编译安装ffmpeg是件麻烦事,但是ffmpeg的成功编译又关系到后面使用opencv的成功与否,本文作者在3台ubuntu系统上折腾过ffmpeg,每台电脑因为ffmpeg都重装过2次以上系统,有的是因为莫名其妙的问题,有的是因为一开始版本过高后来想换低版本,结果链接库的时候又提示失败。今天给大家分享完整的编译ffmpeg的过程，下面的命令行都可以直接复制使用：
此次完全成功的版本是:ubuntu14.04+ffmpeg
本文作者安装的共享库路径一致指定为:/usr/local,你也可以指定自己的,比如/usr
1：安装MP3音频编码器 lame

wget https://sourceforge.net/projects/lame/files/lame/3.99/lame-3.99.5.tar.gz/download  "lame-3.99.5.tar.gz"tar zxvf lame-3.99.5.tar.gzcd lame-3.99.5./configure --enable-shared --prefix=/usr/local  &&make -j8 && make install 

2.安装汇编优化器yasm

wget http://www.tortall.net/projects/yasm/releases/yasm-1.3.0.tar.gztar zxvf yasm-1.3.0.tar.gzcd yasm-1.3.0./configure --enable-shared --prefix=/usr/local  &&make -j8 && make install 

3.安装ogg库，libogg

wget http://downloads.xiph.org/releases/ogg/libogg-1.3.2.tar.gz tar zxvf libogg-1.3.2.tar.gz cd libogg-1.3.2./configure --enable-shared --prefix=/usr/local  &&make -j8 && make install 

4.安装vorbis编解码器，libvorbis

wget http://downloads.xiph.org/releases/vorbis/libvorbis-1.3.3.tar.gztar zxvf libvorbis-1.3.3.tar.gzcd libvorbis-1.3.3./configure --enable-shared --prefix=/usr/local  &&make -j8 && make install 

这里有可能出现错误提示:

 *** Could not run Ogg test program, checking why... *** The test program compiled, but did not run. This usually means *** that the run-time linker is not finding Ogg or finding the wrong *** version of Ogg. If it is not finding Ogg, you'll need to setyour *** LD_LIBRARY_PATH environment variable, or edit /etc/ld.so.conf to point *** to the installed location Also, make sure you have run ldconfig if that *** is required on your system *** *** If you have an old version installed, it is best to remove it,although *** you may also be able to get things to work by modifying LD_LIBRARY_PATH configure: error: must have Ogg installed! 

解决办法:

# vi /etc/ld.so.conf include /etc/ld.so.conf.d/*.conf /usr/local/lib # ldconfig –v 

5.安装x264编码器的库，x264-snapshot

git clone http://git.videolan.org/git/x264.gitcd x264./configure --enable-shared --prefix=/usr/local  &&make -j8 && make install 

6.安装xvid编码器，xvidcore

wget http://downloads.xvid.org/downloads/xvidcore-1.3.2.tar.gztar zxvf xvidcore-1.3.2.tar.gz cd xvidcore/build/generic/./configure --enable-shared --prefix=/usr/local  &&make -j8 && make install 

7.安装dts库,libdca

wget http://download.videolan.org/pub/videolan/libdca/0.0.5/libdca-0.0.5.tar.bz2tar xvf libdca-0.0.5.tar.bz2cd libdca-0.0.5./configure --enable-shared --prefix=/usr/local  &&make -j8 && make install 

8.安装a52，a52dec

wget http://liba52.sourceforge.net/files/a52dec-0.7.4.tar.gztar zxvf a52dec-0.7.4.tar.gzcd a52dec-0.7.4./configure --enable-shared --prefix=/usr/local   'CFLAGS=-fPIC' &&make -j8 && make install 

注意这里configure 的选址里面多了’CFLAGS=-fPIC’,如果加这个选项的话,会出现这个错误:

/usr/bin/ld: .libs/imdct.o: relocation R_X86_64_32S against `a local symbol’ can not be used when making a shared object; recompile with -fPIC.libs/imdct.o: could not read symbols: Bad valuecollect2: ld returned 1 exit statusmake[1]: *** [liba52.la] Error 1make[1]: Leaving directory `/home/buynintw/src/a52dec-0.7.4/liba52′make: *** [install-recursive] Error 1

9.安装faad

wget http://downloads.sourceforge.net/faac/faad2-2.7.tar.gztar xvf faad2-2.7.tar.gzcd faad2-2.7./configure --enable-shared --prefix=/usr/local  --with-mp4v2 &&make -j8 && make install 

10.安装faac编码器

wget http://downloads.sourceforge.net/faac/faac-1.28.tar.gztar xvf faac-1.28.tar.gzcd faac-1.28./configure --enable-shared --prefix=/usr/local --with-mp4v2  &&make -j8 && make install 

这里肯定会出现一个错误,因为这是源码中的语法错误:

In file included from mp4common.h:29:0,from 3gp.cpp:28:mpeg4ip.h:126:58: error: new declaration ‘char* strcasestr(const char*, const char*)’ /usr/include/string.h:369:28: error: ambiguates old declaration ‘const char* strcasestr(const char*, const char*)’make[3]: *** [3gp.o] Error 1make[3]: Leaving directory `/usr/local/pc/ffmpeg/faac-1.28/common/mp4v2'make[2]: *** [all-recursive] Error 1make[2]: Leaving directory `/usr/local/pc/ffmpeg/faac-1.28/common'make[1]: *** [all-recursive] Error 1make[1]: Leaving directory `/usr/local/pc/ffmpeg/faac-1.28'make: *** [all] Error 2

解决办法很简单:
在faac-1.28当前目录下,

cd common/mp4v2vi mpeg4ip.h

找到源代码的第126行和129行
如果vi没有打开行数显示,先:

vi ~/.vimrc

然后在里面写入set nu
然后保存退出source ~/.vimrc就能显示行号了
修改对应代码段为:

修改前：#ifdef __cplusplusextern "C" {#endifchar *strcasestr(const char *haystack, const char *needle);#ifdef __cplusplus}#endif修改后：#ifdef __cplusplusextern "C++" {#endifconst char *strcasestr(const char *haystack, const char *needle);#ifdef __cplusplus}#endif

全部的改变在于两行:
1:extern “C” {变成extern “C++” {
2:char *strcasestr变成const char *strcasestr
然后再make clean,重新configure,make和make install就行
11.安装3gp的一些编解码文件，amrnb、amrwb

首先是amrnb:wget http://ftp.penguin.cz/pub/users/utx/amr/amrnb-11.0.0.0.tar.bz2 tar xvf amrnb-11.0.0.0.tar.bz2 cd amrnb-11.0.0.0 ./configure --enable-shared --prefix=/usr/local --with-mp4v2  &&make -j8 && make install 

然后是amrwb:wget http://ftp.penguin.cz/pub/users/utx/amr/amrwb-11.0.0.0.tar.bz2 tar xvf amrwb-11.0.0.0.tar.bz2 cd amrwb-11.0.0.0 ./configure --enable-shared --prefix=/usr/local --with-mp4v2  &&make -j8 && make install 

12.安装opencore-amr

wget https://sourceforge.net/projects/opencore-amr/files/opencore-amr/opencore-amr-0.1.3.tar.gz/download  "opencore-amr-0.1.3.tar.gz"tar zxvf opencore-amr-0.1.3.tar.gzcd opencore-amr-0.1.3 ./configure --enable-shared --prefix=/usr/local --with-mp4v2  &&make -j8 && make install 

13.最后终于可以安装ffmpeg了.可是这里的坑也多
首先是ffmpeg版本的选择,3以上的版本对opencv支持有的不兼容,因此推荐装2版本,2.8,2.7,2.4都行
然后就是这里的configure选项也是很重要的,网上很多版本,让人不知道该configure哪些,这里的终极大招还不会出错的configure如下(其实也是错了多次再回来重新configure得出的教训):

./configure --prefix=/usr/local --enable-libmp3lame --enable-libvorbis --enable-gpl --enable-version3 --enable-nonfree --enable-pthreads --enable-libfaac --enable-libopencore-amrnb \--enable-libopencore-amrwb --enable-libx264 --enable-libxvid --enable-postproc --disable-ffserver --disable-ffplay  --enable-pic --enable-shared最后make -j8 && make install 

还没完,现在你在命令行直接输入ffmpeg会提示缺少某个库libXXXX, No such file or directoy
,因为我们还没把ffmpeg需要的库告诉系统,这里就取决于之前你–prefix=/usr/local的路径,将这个路径后面加一个lib加入到/etc/ld.so.conf文件中即可:
我们这里的路径当然是/usr/local/lib

sudo vi /etc/ld.so.conf

在文件里面另起一行
内容就是之前的路径:/usr/local/lib
然后保存退出,
执行命令ldconfig
此时在命令行输入ffmpeg就行了

[注意]:一定注意之前在不同的configure中加入的 ‘CFLAGS=-fPIC’之类的不同的选项不能少,不然后面你还是得回来重新安装,别在前面为了快捷直接./configure也不–enable-shared ,后面有你好受的,全程遵循我的步骤,不会错的骚年!