linux 安装 ffmpeg 教程 假设下载目录 /opt/soft cd /opt/soft 解压包: tar -jxvf ffmpeg-2.8.6.tar.bz2 进入解压后目录 cd ffmpeg-2.8.6 执行 ./configure --enable-shared --prefix=/usr/local/ffmpeg 提示出错: yasm/nasm not found or too old. Use --disable-yasm for a crippled build. If you think configure made a mistake, make