Install 64 bit Strawberry Perl Delete Strawberry Perl path entries from system path Install 64 bit NASM Enter the NASM install directory on your Windows PATH git clone https://github.com/openssl/openssl.git Open 64 bit VS command shell as Administrator build OpenSSL using steps below (this could take a while). Now, download the OpenSSL pkg-config folder here and place it in the lib directory of your OpenSSL install directory. > cd %SOURCE_DIR%gst-build > meson build --reconfigure --prefix=%GSTREAMER_1_0_ROOT_X86_64% -Dtls=disabled -Ddevtools=disabled && ninja -C build install