ffmpeg安装

1、分别解压ffmpeg、yasm、opencore、lame
2、configure makemake install yasm组件
3、configure makemake install open组件

4、执行./configure --enable-libopencore-amrnb --enable-version3makemake install ffmpeg组件

如果报错common.mak:28: *** unterminated call to function `foreach': missing `)'.

表示make版本太低，要求3.81版本，需要安装make到单独的目录

重新make，直接利用新的make进行make，如到指定目录下执行/export/home/zzy/make/latest/bin/make

如果缺少某些包，需要根据具体情况进行环境变量的配置

declare -x LD_LIBRARY_PATH="/usr/local/lib:/export/home/zzy/wav2amr/app/yasm/lib:/export/home/zzy/wav2amr/app/opencore-amr"

wav2amr

ffmpeg -i in/18953100357_18629064137_20110623112310.wav  -acodec libopencore_amrnb   -y out/18953100357_18629064137_20110623112310.amr

ffmpeg -i 29918757.flv  -f 3gp  -acodec aac -s 176x144 -ar 16000 -ab 12200 -ac 1 -y -strict experimental amrnb3.3gp 
ffmpeg -i 29918757.flv  -f 3gp  -acodec aac -s 176x144 -y -strict experimental 98.3gp 

/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:76: error: storage size of 'tuner' isn't known
libavdevice/v4l.c:134: error: invalid application of `sizeof' to incomplete type `video_tuner' 
libavdevice/v4l.c:141: error: invalid application of `sizeof' to incomplete type `video_tuner' 
libavdevice/v4l.c:76: warning: unused variable `tuner'
make: *** [libavdevice/v4l.o] 错误 1
解决办法  
将/usr/include/linux/videodev.h中的ulong类型改为 unsigned long 类型，编译还可能报错如下
  HTML    doc/developer.html
Unknown option: init-file
Try 'texi2html -help' for usage instructions.
make: *** [doc/developer.html] 错误 2
属于文档错误，不必理会 ，直接make install即可。

截图
ffmpeg -i 29918757.flv -ss 1 -s 192*80 -f image2 11.jpg

 wav2mp3
lib supporter : libmp3lame
./configure --enable-libopencore-amrnb --enable-version3 --enable-libmp3lame --prefix=/usr/local/ffmpeg 
hint:ERROR: libmp3lame >= 3.98.3 not found
download:
http://sourceforge.net/projects/lame/files/latest/download?source=files
优选
./configure --enable-shared


备选
./configure --prefix=/static --disable-shared --enable-static


make
make install


./configure --enable-shared




编译后报错依旧（share编译应不会报错，static编译可能会报错），执行ffmpeg configure 报错依旧，查看config.log 找不到lame.sh，可以采用如下命令指定lame.sh位置


./configure --enable-libopencore-amrnb --enable-version3 --enable-libmp3lame --prefix=/usr/local/ffmpeg  --extra-cflags=-I/static/include --extra-ldflags=-L/static/lib
最终
ffmpeg -i 04596677878_13339397677_20101230094147.wav -y  -vn -ar 44100 -ac 2 -ab 192 -f mp3 son_final.mp3