vMix includes some open source libraries. Details of some these libraries and applicable source code is available below:

FFmpeg

This software uses code of FFmpeg licensed under the LGPLv2.1 and its source can be downloaded here

FFmpeg was compiled using the following command line:
./configure --toolchain=msvc --enable-shared --disable-static --arch=amd64 --enable-zlib
./make

FFmpeg Command Line

This software utilises the FFmpeg command line software licensed under the GPLv3. Its source can be downloaded here
The command line software incorporates x264, the source code and licenses can be found in the download above.

FFmpeg command line was compiled using the following:
./configure --enable-gpl --enable-version3 --enable-libx264 --enable-zlib --enable-nvenc --cpu=i686
./make