1.制作一个目录avconv-source

mkdir avconv-source

2.)下载并安装x264库

cd ~/avconv-source
git clone git://git.videolan.org/x264.git x264
cd x264
sudo ./configure --enable-static
sudo make
sudo make install

3.)下载avconv源码

cd ~/avconv-source
git clone git://git.libav.org/libav.git avconv
cd avconv
sudo ./configure
sudo ./configure --enable-gpl --enable-libx264
sudo make
sudo make install

现在你可以执行

avconv -i test.mov -c:v libx264 -c:a copy test.mp4