I managed to make a lot of progress tonight - fixed the compiler error, figured out how to get the 32-bit libraries needed to compile on Ubuntu and finally got a working build of both tsMuxer and tsMuxerGUI!
I have now made the repository public so you can all try compiling for your platform or just hack away at the code:
https://github.com/justdan96/tsMuxer
Thanks to everyone for being so patient, hopefully this will lead to a lot of healthy discussion and collaboration!