ffmpeg config 命令
./configure --enable-gpl --enable-shared --enable-libopenjpeg --enable-libx264 --enable-libx265 --enable-openssl --enable-debug=3 --enable-nonfree
报错 ERROR: openssl not found
sudo apt install openssl 无效，会提示已安装
解决办法
sudo apt install libssl-dev libssl-doc
然后就可以了