yasm/nasm not found or too old. Use --disable-yasm for a crippledbuild错误
2017-07-21 12:04
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安装ffmpeg过程中，执行./configure时，报yasm/nasm not found or too old. Use --disable-yasm for a crippledbuild错误，分析、解决如下：
分析：yasm是汇编编译器，ffmpeg为了提高效率使用了汇编指令，如MMX和SSE等。所以系统中未安装yasm时，就会报上面错误。
解决：安装yasm编译器。安装方法如下：
在http://www.tortall.net/projects/yasm/releases下面找到适合自己平台的yasm版本。然后进行安装。举例如下：
1）下载：wget http://www.tortall.net/projects/yasm/releases/yasm-1.3.0.tar.gz
2）解压：tar zxvf yasm-1.3.0.tar.gz
3）切换路径： cd yasm-1.3.0
4）执行配置： ./configure
5）编译：make
6）安装：make install
分析：yasm是汇编编译器，ffmpeg为了提高效率使用了汇编指令，如MMX和SSE等。所以系统中未安装yasm时，就会报上面错误。
解决：安装yasm编译器。安装方法如下：
在http://www.tortall.net/projects/yasm/releases下面找到适合自己平台的yasm版本。然后进行安装。举例如下：
1）下载：wget http://www.tortall.net/projects/yasm/releases/yasm-1.3.0.tar.gz
2）解压：tar zxvf yasm-1.3.0.tar.gz
3）切换路径： cd yasm-1.3.0
4）执行配置： ./configure
5）编译：make
6）安装：make install
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