sudo apt install gnutls-dev
cd /usr/local/src
git clone https://github.com/r3n33/FFmpeg.git -b dynoverlay
cd FFmpeg
./configure --arch=armel --target-os=linux --enable-gpl --enable-libx264 --enable-nonfree --enable-gnutls --extra-libs=-ldl --enable-zlib
make -j4
sudo make install