I got some help from someone I know, I simply used:
apt-cache search libavformat
this will list the package name you need, the above example outputs
libavformat-dev - Development files for libavformat
libavformat-extra-54 - Libav file format library (transitional package)
libavformat54 - Libav file format library
libdlna-dev - development files for libdlna
libdlna0 - DLNA codec library
the development files name is what you need: so
sudo apt-get install libavformat-dev
gets me what I want, then do the same for the others, I found the instructions in the readme of AppGameKit were useless for me anyhow, coz I got file not found or whatever the output was!
Hope this helps with others who are stuck on getting this working on the latest ubuntu
Thing is I have ran my code that was ok in windows, but not in linux, it is when I call my model loading function to select and load in a .obj model, I simply get no file select window whatsoever!
Hail to the king, baby!