思路 ，先 configure之后 编辑config.mak,在make；make install
x264
./configure --enable-pthread --enable-static --disable-shared --host=arm-linux --disable-asm
ffmpeg
./configure --enable-cross-compile --arch=aarch64 --target-os=linux --enable-static --enable-shared --disable-yasm --enable-gpl --cc=aarch64-linux-gnu-gcc --enable-libx264 --extra-cflags=-I/usr/local/include --extra-ldflags=-L/usr/local/lib --prefix=/root/work/code/BaseCore/src/ffmpeg/ffmpeg-aarch64 --extra-libs=-ldl
修改 config.mak看链接中红线部分 https://blog.csdn.net/sunxiaopengsun/article/details/79347960